Use the view menu to select the layout and format of the data. Click the Go button to make the new settings take effect.
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Normalised response plots for different Ipod EQ settings:
1. Bass reducer
2. Small Speakers
3. Jazz
4. Spoken Word
5. Hiphop
6. Treble booster....
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MP3 Player
Chris Skirrow
AL = -6dBu, EQ - flat, Vol - Full
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iPod Video tested using MS10 Sequence 3 and Segment h at -18dB FS with Noise shaping. Composite results sheet.
The iPod has a very good frequency response and noise and distortion performance. The iPod would ....
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MP3 Player
TEST
AL = -6dBu, EQ - flat, Vol - Full
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iPod Video tested using MS10 Sequence 3 and Segment h at -18dB FS with Noise shaping. Composite results sheet.
The iPod has a very good frequency response and noise and distortion performance. The iPod would ....
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MP3 Player
Test
AL = -6dBu, EQ - flat, Vol - Full
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iPod Video tested using MS10 Sequence 3 and Segment h at -18dB FS with Noise shaping. Composite results sheet.
The iPod has a very good frequency response and noise and distortion performance. The iPod would ....
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CD Player
Xiaoyuan Gu
Digital IO -15dB FS, SEQ3 on Test CD2
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Excellent CD transport. The Philips CD Pro2M mechanism, the top loader and the black gates are certainly a plus. Minor roll-off of the bottom end, and phase shifts, nevertheless a top performer. Tested with the ....
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CD Player
Xiaoyuan Gu
Analog IO -15 dB FS, MF X-DAC V3
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Excellent CD transport. The Philips CD Pro2M mechanism, the top loader and the black gates are certainly a plus. Minor roll-off of the top end, and phase shifts, nevertheless a top performer. Tested with the ....
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Microphone
Pete Skirrow
Short grill fitted
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Tested by comparison with Lindos MM3 mic (believed flat) in Lindos studio using Mackie HR824 speaker plus 18-inch sub-woofers.
Note the 6dB peak around 15kHz cause by the grill chamber resonance, which will add some ....
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Microphone
Pete Skirrow
Miniature electret @100mm full seq
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Excellent low noise miniature electret mic. A lower cost alternative to the DPA4060, with almost the same noise level, though max SPL is specified as 120dB.
Note HF peak of 4dB@15kHz (less than Beyer show ....
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Appalling frequency respose, no bass! Suspect this is 91-143 sold as having speech-only response, though it was supplied as a 91-142 sold as 'truly flat response'!
Tested by comparison with Lindos MM3 mic (blue trace) ....
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Speaker
Pete Skirrow
With Lindos LF Equaliser EQ1
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EXCELLENT SMALL SPEAKER - almost meets GradeB. This speaker broke new ground with an aluminium honeycomb sealed enclosure (no ports) for resonance-free bass, and low coloration impulse response plus laser tested drivers.
Tested using Lindos ....
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Speaker
Pete SKirrow
Half-space Mic @ 1m
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EXCELLENT SMALL SPEAKER which broke new ground with an aluminium honeycomb sealed enclosure (no ports) for resonance-free bass, and low coloration impulse-response plus laser tested drivers.
Tested using 'Lindos Outdoor Half-space' method. +10dB gain set ....
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MP3 Player
Pete Skirrow
128 kb/s test file AL -18dBFS
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Excellent Quality - Almost GradeA but for level. Note phase shift indicating a single time-shared DAC. Rather fiddly to use and upload to. I prefer SD flash card player for easy organisation of music files ....
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PC Sound Card
Pete Skirrow
In-Out using Creative Recorder -15A
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Poor noise level, even though this was a test with alignment level 15dB below FS.
Aligned for -18dB FS noise would be -56dB, which is some 12dB worse than the best 16-bit performance! At other ....
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Headphones
Pete Skirrow
In-Ear Response
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Lacking bass and uncomfortable. The sound is not bad as cheap headphones go, and the top-end is actually impressive but ruined by the 3kHz peak and rapid rolloff below 150Hz.
Measured using modified Lindos MM3 ....
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CD Player
Xiaoyuan Gu
Analog IO
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Decent performer except falls at spectrum extremes. Good noise results but unfortunately clips at full-scale. Cute design though. Tested with the E-MU 1616M sound card by Xiaoyuan Gu.....
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Cassette Deck
Pete Skirrow
Rec-Replay TDK-SAX DolbyB
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Poor noise level spoils otherwise excellent results . Noise is 7dB higher than if the tape is replayed on a JVC machine.This problem is common to other Denon machines and seems to be caused by ....
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Cassette Deck
Pete Skirrow
Headroom Plot Rec-Replay Dolby-B TDK-SAX
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Bias set for SAX (hi bias) tape. Note the smooth soft-limiting which is so valued for minimising harshness on overload peaks. This is giving 7dB of compression at +19dB
....
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Cassette Deck
Pete Skirrow
Replay only from Test Tape
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This deck is as supplied, no azimuth trim etc. The test tape was Made using TDK-SAX on Denon DR-M24HX with high bias. Note excellent HF response, free from the gross roll-off on one channel obtained ....
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Cassette Deck
Pete Skirrow
REC-REPLAY Dolby-B TDK-SAX
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Excellent Freq Response
This is a two-head machine measured during record. Note the slight phase error due to head misalignment (both heads are in one block).
Noise performance is poor - a good machine can ....
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Cassette Deck
Headroom Plot Rec-Replay Dolby-B TDK-SAX
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Bias set for SAX (hi bias) tape. Note the smooth soft-limiting which is so valued for minimising harshness on overload peaks. This is giving 7dB of compression at +19dB
....
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Cassette Deck
test
Headroom Plot Rec-Replay Dolby-B TDK-SAX
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Bias set for SAX (hi bias) tape. Note the smooth soft-limiting which is so valued for minimising harshness on overload peaks. This is giving 7dB of compression at +19dB
....
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Cassette Deck
test
Headroom Plot Rec-Replay Dolby-B TDK-SAX
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Bias set for SAX (hi bias) tape. Note the smooth soft-limiting which is so valued for minimising harshness on overload peaks. This is giving 7dB of compression at +19dB
....
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Microphone
Pete Skirrow
With short grill fitted
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....
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Microphone
Pete Skirrow
No Grill fitted
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Excellent mic for many purposes, with lower noise than most electrets and exceptional high level capability to 130dB SPL with low distortion (particularly necessary for boom-mounted mics used on stage performers but also useful for ....
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Microphone
Pete Skirrow
Short Grill Fitted Full sequence @ 100mm
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Red is DPA4060 short grill
Blue is Lindos MM3.
Source is 3" driver in infinite baffle at 100mm with bass EQ (not correct). The use of a single driver allows high levels to be achieved ....
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Microphone
Pete Skirrow
Short grill, full seq
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Using 3" speaker @100mm with (non ideal) bass EQ, by comparison with Lindos MM3 (blue DPA red MM3).
Note 3 to 4dB HF peak compared to 1dB without grille.....
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Microphone
Pete Skirrow
No grille, full seq @ 100mm
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Using 3" Speaker as source, @100mm with (non ideal) bass EQ.
Noise is not valid (amp noise)
Dist Residue is mostly that of speaker (as DPA4060 is known to acheive -60 @ 100dB SPL, but ....
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CD Player
Xiaoyuan Gu
Analog IO, interconnects: VDH the Second
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Decent performance except phase shifts, rolloff of the subbass and clipping at full-scale. The former is perhaps due to the single BB DAC chip used for the main analog outputs. Tested with E-MU 1616 M ....
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PC Sound Card
Chris Skirrow
DigiSonic
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Output Calibration
7.79dB
Input Calibration
7.17dB
Max I/P and O/P +10dBu....
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....
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....
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PC Sound Card
Xiaoyuan Gu
Digital IO -18dBFS
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Top-notch sound card. Minor roll-off at the bottom end - the first octave. Generous software package and solid build quality. Would be good to have drivers for MacOS and Linux.....
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PC Sound Card
Xiaoyuan Gu
Analog IO -18dBFS
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Top-notch sound card. Minor roll off at the bottom end - the first octave. Generous software package and solid build quality. Would be good to have drivers for MacOS and Linux.....
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Speaker
Pete Skirrow
Infinite Baffle Mic @ 50mm 100dB SPL
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Suspect dip at 30 is a room resonance Lindos MM3 Mic used, no EQ applied Fitted in wall between two rooms.....
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Speaker
Pete Skirrow
Infinite baffle with crossover (100Hz) and EQ
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Superb response +/-2dB 16Hz to 90Hz with very high level low-frequency capability
Manual measurements -2dB @16 -4@12Hz
Lindos MM3 Mic @50mm from voice-coil, @100dB SPL, dip at 30 may be room resonance.
'Direct Trigger' used ....
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PC Sound Card
Xiaoyuan Gu
Analog IO
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Good performance except that it can not handle well loud materials 12 dB and up - clipping experienced. Tested with the E-MU 1616M sound card by Xiaoyuan Gu.....
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PC Sound Card
Chris Nainby
With Digital I/O
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The Echo MIA card installs its own Control Panel and has the possibility to send and receive SPDIF and AES3 / EBU admittedly both in an unbalanced interface but this does work. ....
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PC Sound Card
Chris Nainby
With Magma Chassis
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Interestingly using the PCI Expansion Chassis made the DigiSonic more consistent in terms of uninterrupted audio. I found when running some of the USB and Firewire Interfaces very little CPU load would cause the audio ....
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PC Sound Card
Chris Nainby
-8 under 0dBfs
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Wavelab 5 Rec / Replay
See http://www.echoaudio.com/Products/PCI/MiaMIDI/index.php for more details.....
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MP3 Player
Pete Skirrow
'Classical' 128kb/s test file
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Good Value (£19) player with a difference - no internal memory, just insert SD flash (512MB max) which needs no support software. Sadly no directories. Unfortunately there is no 'flat' setting, 'rock' gives huge low ....
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MP3 Player
Pete Skirrrow
'Jazz' 128kb/s test file
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See 'classic' setting page....
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MP3 Player
Pete Skirrow
'Normal' 128k test file
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Hardly 'normal'! Obviously compensated for poor earphones. Sadly, non of the four settings is flat, thought the 'Jazz' or 'Classic' settings sound pretty good through the earphones supplied.....
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MP3 Player
Pete Skirrow
'Pop' 128kb/s test file
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Not the way I listen to Pop, more like 'telephone'! Five settings but none of them flat - what a shame! Sounds pretty good though if set to 'classical' with any headphones than lack bass.....
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PC Sound Card
Chris Skirrow
DigiSonic
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Input Offset
-10dB
Output Offset
+10dB....
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Cassette Deck
Pete Skirrow
Rec-Rep Dolby B TDK-SA
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After trimming record level trimmers so 0dB on meters gives 0dB Unison out. Despite being a cheaper single-head machine, this unit has much lower noise and distortionthan for example the Denon DR-M24HX aligned to sametape ....
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Cassette Deck
Pete Skirrow
Replay Only TDK-SAX
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Excellent results. Note the lower noise (by 6-7dB) than on the Denon machine (DR-M24HX) that made the test tape. Also lower distortion!
This SAX tape made with high bias is much more compatible than SA ....
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Filter
Pete Skirrow
Bass EQ for 18-inch Eminenc
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At max gain....
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Designed to equalise the Celestion SL600 speakers for flat half-space response down to 25Hz.....
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AD/DA Convertor
Pete Skirrow
48k 16-bit Noise-Shaped
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Excellent -passes UniSon GradeA++
This shows the true potential 16-bit digital audio, a reference against which to judge other equipment.....
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AD/DA Convertor
Pete Skirrow
In-Out 96k 24-bit
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Excellent - Passes UniSon GradeA++....
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AD/DA Convertor
Pete Skirrow
96k 24-bit Wide Sweep
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....
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AD/DA Convertor
Pete Skirrow
In-Out 48k 24-bit
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Excellent - Lindos UniSon Grade A++....
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Microphone
Pete Skirrow
Two MM3's compared
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This represents the worst case of two MM3's compared. See also the DPA4060 test where the reference is the blue mic in this trace, and the Mackie speaker test using the same (blue trace here ....
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Microphone
Chris Skirrow
Ser 002
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Mic under test (blue)
Compared to reference MM3 (red)
Lindos studio speaker Mackie + subwoofer @ 0.5m on tweeter axis 100dB SPL....
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....
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AD/DA Convertor
Chris Skirrow
16-bit 44.1k Noise-Shape
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....
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Speaker
Pete Skirrow
In studio 7x5x2.5m @2.5m with corner traps
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This is about as good as it gets measured at the listening position in a room! Note that a 3dB drop from LF to HF is generally thought optimal (resulting from the way our ears ....
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Test Equipment
Chris Skirrow
S/N:151 Tested back to back
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....
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PC Sound Card
Chris Skirrow
DigiSonic
|
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Default 0dB Input / Output Levels....
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Speaker
Pete Skirrow
Halfspace and Flat settings MM3 Mic @0.6m
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Excellent frequency response from this top-of-the-range professional monitor. The bass cone was near max travel at low frequencies on this 100dB SPL test, though levels up to 117dB SPL are possible over the rest of ....
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Speaker
Pete Skirrow
Headroom Plot - Mic@ 0.6m
|
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Excellent - linear to 117dB SPL @ 1kHz (though the bass unit limits at 100dB SPL at 30Hz).
Input -6dBu to Phono
Ouput rel to 100dB SPL. Lindos MM2 Mic (DAP4060) used for high level ....
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This little speaker drive unit demonstrates the advantages of High-BL (it has a very big magnet for its size). This makes compensation down to 30Hz feasible at low levels.
As well as giving high sensitivity ....
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Speaker
Pete Skirrow
@200mm 100dBSPL on tweeter axis
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Excellent result from an innovative (and expensive!) high performance active loudspeaker (made in Germany) which uses a coaxial 125mm mid-range driver crossing over from a 400mm bass driver at 550Hz. The small mid-range driver allows ....
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MP3 Player
Pete Skirrow
MP3 Test File 128kb/s AL@-15dBFS
|
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Not bad, for a device costing £110 - meets GradeA- apart from low output level. -57dB noise level is very acceptable.
Slot-in SD memory (no HD) and big display with quick scrolling are good features ....
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Tested using SEQ3 and segment 'h' from Lindos test CD2.....
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AD/DA Convertor
Xiaoyuan Gu
Analog outputs
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Good overall performance but clips at full-scale. Note that the resutls were limited by the sound card used. Digital cable: Kimber Illumination D-60 silver coaxial cable. Analog interconnects: Stealth Audio PGS. Powered by the Musical ....
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AD/DA Convertor
Xiaoyuan Gu
Hard Disk Playback of SEQ3
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Decent results, but could have been better expecially this approach avoids the eight-to-fourteen modulation in optical pickup. Tested with the E-MU 1616M sound card, Kimber Illumination D-60 coaxial cable, Stealth PGS analog interconects, and powered ....
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Other
Xiaoyuan Gu
Analog IO nurqhz sequence
|
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Brilliant tube output stage. Would have passed Lindos Grade A if not clips at full scale. A reasonable way of improving the performance of the CD player. Highly recommended.....
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PC Sound Card
Pete Skirrow
Vol slider set to max
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Passes UniSon GradeB (apart from test level) so not bad, though noise is the weakest feature (16dB worse than good 16-bit).
This laptop is good value for money, and neat in appearance, with 14" widescreen ....
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CD Player
Xiaoyuan Gu
Analog IO -15dB FS
|
|
Brilliant CD player with a civilized tone balance, charming mid-range, and tight bass. Overall rounded presentation. Exceptional building quality - like a tank. Minor roll-off of the bottom end and phase shifts. Tested with the ....
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Headphones
Pete Skirrow
In-Ear Response
|
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Horrible muffled sound! Sold as having high bass, they actually have bass-boom as would be predicted from the 8dB peak at 100-200Hz! Poor hi-end reponse.
Measured using modified Lindos MM3 mic fitted into earplug - ....
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AD/DA Convertor
Pete Skirrow
Replay only from CD2 44.1k WAV file
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Not bad, and excellent value for around £30. Amost passes Lindos Grade A if output level is ignored.
Freq response - excellent.
Phase response - excellent, clearly uses separate convertors for each channel.
Noise, pretty ....
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AD/DA Convertor
Pete Skirrow
Digital to digital - analog linked directly
|
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Very poor! High frequency rolloff is quite unacceptable. Phase shift suggests a single time multiplexed A-D (though the D-A showed no such failing). Noise poor despite low clipping level.
As a D-A only this device ....
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Speaker
Pete Skirrow
In lounge stereo @ 2.5m no EQ
|
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Excellent speaker - probably still the best because of their extremely low colouration. This plot is more a feature of the room than the speakers, and can be improved with a little bass equalisation down ....
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Speaker
Pete Skirrow
In lounge (5.0x5.5m) @0.5m L chan
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Superb speakers, still the best for low colouration. Though pretty loud, the measured max SPL @2m in lounge is only 100dB SPL with 100w/chan amp, and though bass boost below 40Hz can be used to ....
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Other
Pete Skirrow
Save-play AAC 128kb/s
|
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....
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Other
Pete Skirrow
RA8 with ATRACS3 264kb/s
|
|
This is a test of ATRACS quality using RealPlayer to make the file from Lindos CD2 and then play back via Yellowtek PUC USB 'soundcard'.
Note the extended bandwidth to 20kHz, compared to 11kHz for ....
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Other
Pete Skirrow
MP3 96kb/s save-play
|
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This is a test of MP3 quality using RealPlayer to make the file from Lindos CD2 and then play back via Yellowtek PUC USB 'soundcard'
Good noise and dist but note the 11kHz rolloff. This ....
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Other
Pete Skirrow
MP3 128kb/s vbr Save-play (rip from CD)
|
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This uses the 'variable bit rate' MP3 option which produces a much smaller file on these tests. This suggests that variable bit rate should be avoided as it does not just reduce file size on ....
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Other
Pete Skirrow
MP3 128kb/s Save-Play
|
|
This is a test of MP3 quality using RealPlayer to make the file from
Lindos CD2 and then play back via Yellowtek PUC USB 'soundcard'
Not bad, but note 16kHz rolloff. This is much better ....
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Other
Pete Skirrow
MP3 192kb/s Save-Play
|
|
This is a test of MP3 quality using RealPlayer to make the file from
Lindos CD2 and then play back via the Yellowtek PUC USB 'soundcard'.
Excellent noise and dist (the noise level is actually ....
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Other
Pete Skirrow
MP3 320kb/s Save-play (rip from CD)
|
|
Roll-off above 16kHz is almost the same as for the 128ks/s test, and is a feature of the MP3 encoding, since tests using WAV files give a flat response to 20kHz out of the PUC. ....
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CD Player
Xiaoyuan Gu
Digital IO + MF X-DAC V3 and X-10 V3
|
|
Clips at full scale due to the DAC added. The phase shift problem remains. Otherwise a performer. Digital cable: Kimber Illumination D60. Analog interconnects are Stealth Audio PGS. Powered by the Musical Fidelity XPSU V3 ....
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CD Player
Xiaoyuan Gu
Analog IO -15 dBFS
|
|
This is a modified version with the chassis internally dumped with bitumen pads and the CD mechanism part with CD mat. The player handles full scale program with ease. Good overall performance except phase shift ....
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Radio
Pete Skirrow
Speaker externally driven
|
|
This is an interesting test of a small modern speaker with roll surround. Unfortunately a full DAB test has not yet been possible, but this plot is interesting as it shows a reasonable response to ....
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Radio
Pete Skirrow
Output amp response (DAB tuner removed)
|
|
Puzzling? The bass boost makes sense, but does the radio really have this amount of HF boost?....
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Headphones
Pete Skirrow
In-ear Response
|
|
Bass-Boom! (Confirmed by music tests). Not good - compare with the HD650 which is much flatter, and our preferred choice.....
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Headphones
Pete Skirrow
In-Ear Response
|
|
Excellent! Wonderful sound on music with real solid bass. These headphones actually are just -1dB @ 20Hz - a very rare thing depite abundant false claims! The 3dB peak @ 100Hz is tolerable, and better ....
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Headphones
Pete Skirrow
In-Ear Response
|
|
Mediocre low-cost headphones lacking bass. Uncomfortable with poor sealing. peak at 3kHz and bass rolloff ruin an otherwise reasonable response.
Measured using modified Lindos MM3 mic fitted into earplug - ear canal blocked.
Drive level ....
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AD/DA Convertor
Chris Skirrow
In-Out 48k 16-bit AL -18FS
|
|
See http://www.sonifex.co.uk/redbox/rbadda_ld.shtml for product details.
Excellent - Passes GradA+. Noise shaping is automatic, achieving the lowest noise possible from 16-bit. See 96k result sheet for notes on possible output imbalance problem
....
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AD/DA Convertor
Chris Skirrow
In-Out 48k 24-bit AL -18FS
|
|
Excellent - Passes GradeA++. See notes on 96k test sheet regarding possible output imbalance problem....
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AD/DA Convertor
Chris Skirrow
In-Out 96k 24-bit AL -18FS
|
|
Excellent - Passes GradeA++. Lower noise is possible from 24-bit, but figures below -75 are not likely to make any difference.
A problem was experienced with the output being badly unbalanced, causing one side to ....
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AD/DA Convertor
Chris Skirrow
24-bit PHASE IN-OUT R CHAN (L CHAN DIRECT)
|
|
....
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AD/DA Convertor
Chris Skirrow
In-Out 44.1k 16-bit AL -18FS
|
|
Excellent Performance. Noise shaping is standard and works well....
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Radio
Pete Skirrow
Megabass On
|
|
Poor bass - so-called 'Megbass' barely manages to equalise the speaker loss at 200Hz. The sound is badly coloured. See Roberts Gemini 15 to see how a proper approach to equalising the speaker can produce ....
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Radio
Pete Skirrow
Mic @ 0.5m Megabass Off
|
|
Poor bass and drastic peaks and dips which are audible as colouration. See test with 'Megabass' on for more comments.
Lindos 'Outdoor-Half-Space' method used with MM3 mic.....
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Video
Pete Skirrow
48k Sample Rate - Level Control at detent
|
|
Good, but noise is up on R chan (same problem confirmed on a second unit). This is a nice machine for both audio recording and DV use and the 48k sound quality can be taken ....
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|
CD Player
Chris Skirrow
Lindos TestCD2B -15dBFS
|
|
Excellent Performance. But note the unexpected phase shift which suggests that one channel is being processed behind the other.
90 deg at 10kHz represents about 1mm path difference in stereo listening, or 5mm of head ....
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CD Player
Chris Skirrow
Lindos CD2 (-18dB FS Noise-Shaped)
|
|
Excellent performance, but fails Grade A on test level and phase.
The latter demonstrates a common problem - a single shared D/A convertor resulting in a time-shift between channels. Though not a problem normally - ....
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Video
Pete Skirrow
In-Out MIC setting, wind filter OFF
|
|
Very poor LF response, and high noise (at this alignment level there is only 9dB of headroom.
Fortunately, the 'line' input setting gives much better signal to noise ratio and a less drastic LF roll-off, ....
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Video
Pete Skirrow
In-Out on Line input setting
|
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Poor LF response, needs compensating. Noise acceptable though 12db worse than true 16-bit performance.
Audio level is set to 4, at which unity gain in-out is acheived. Input is -16dBu (-10dB Unison AL) which just ....
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Speaker
Pete Skirrow
Flat tone controls @ 0.5m
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Very poor bass response. Though these are reflex (ported) multimedia speakers, with a 3-inch roll surround unit plus tweeter, the port appears to contribute nothing, and bass increases slightly if it is blocked. A 3-inch ....
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Video
Pete Skirrow
Line in using MVX2 adaptor
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Fitted with Lindos MVX2 input adaptor which provides a 'Unison' line-level input (AL=0dBu balanced or -6dBu single-ended on a D-type connector) and incorporates appropriate attenuation to accept balanced or unbalanced input at standard levels. It ....
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Video
Pete Skirrow
Line in using Lindos MFX1 adaptor
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Excellent! Passes Lindos Grade B (apart from level out) using the Lindos MFX1 adaptor which plugs into the Mic input to provide a 'Unison' input socket (D-type connector) with appropriate input attenuation and low-frequency response ....
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CD Player
Pete Skirrow
Played on Sony CDP-479 Audio CD Player
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This demonstrates a typical problem when CD-R's are 'burnt' on a PV and played on an audio machine. Clicks at this level are not normally heard, but are caused by the error correction resorting to ....
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PC Sound Card
Pete Skirrow
laying 128kb/s MP3 file Vol out set to full
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Passes UniSon GradeB (apart from test level) but note the clicks and pops that spoil the otherwise good noise performance! They appear to come from the hard drive (also CD drive when that is used). ....
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PC Sound Card
Pete Skirrow
laying 128kb/s MP3 file Vol out set to full
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Passes UniSon GradeB (apart from test level) but note the clicks and pops that spoil the otherwise good noise performance! They appear to come from the hard drive (also CD drive when that is used). ....
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Cassette Deck
John Ford
Vol -14dB, EQ Super-Sound, AL=-6dB
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Volume control on unit shown in dB, with 0dB as the maximum.
Volume needed to be set at -14dB to get the test level as close as possible to 0dB on the MS10.
'Super-Sound Equaliser' ....
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Cassette Deck
John Ford
Vol -14dB, EQ Super-Sound, AL=-6dB
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Volume control on unit shown in dB, with 0dB as the maximum.
Volume needed to be set at -14dB to get the test level as close as possible to 0dB on the MS10.
'Super-Sound Equaliser' ....
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CD Player
John Ford
Vol -8dB, EQ Super-Sound, AL=-6dB
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Tested using SEQ3 from Lindos CD2 - noise shaped.
Volume control on unit shown in dB, with 0dB as the maximum.
Volume needed to be set at -8dB to get the test level as close ....
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Speaker
Pete Skirrow
Mounted in infinite baffle - mic @ 0.2m
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200Hz peak indicates relatively low damping resulting in rapid rolloff below 100Hz (over 12dB/octave). 20kHz good but peak around 10kHz needs correction.....
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Speaker
Pete Skirrow
No box @ 150mm
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....
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PC Sound Card
Pete Skirrow
REC-REPLAY AL@-18FS
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Good as sound cards go, and the true accurate levels are nice, but noise performance falls short of best 16-bit by about 8dB.
Tested by recording to Creative Recorder. Note that noise is some 4dB ....
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PC Sound Card
Pete Skirrow
Replay only - CD2 44k AL@-18FS Noise-Shaped
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Good as sound cards go, but not true 16-bit performance! The accurate output levels are very nice, but noise levels are around 4dB worse than 16-bit, even on this replay only test from a a ....
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AD/DA Convertor
Pete Skirrow
Output balance check
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Major Problems! This test was made using a simple adaptor into the MiniSonic which loads each side of the left channel with 4.7k to ground and connects each side to the + input of a ....
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