WillistonAudioLabs Posted October 11, 2013 Report Share Posted October 11, 2013 I'm sure many of you have heard praises about the SQ of the Pioneer 80PRS head unit. I've been using the 80PRS in my daily driver for about 6 months and since I recently got my hands on an "old school" Panasonic VP-7704P THD / Volt meter, I felt it would be interesting to see how it measured.Test parameters:- 1kHz 0dB test tone from SMD DD-1 setup CD- Internal amp disabled- Measurement taken at end of 17ft RCA Cable (shows exactly what the amp is seeing)- More tests upcoming showing USB/Bluetooth comparisonsWow, impressive results!4.81V of super clean 0.015% THD at full volume 62 Watch the video in 1080P on YouTubeor embedded below: See my videos on YouTube http://www.willistonaudio.com Many tests and demos of OLD and NEW SCHOOL car audio gear! See cool pics on Instagram @oldschoolstereo Link to comment Share on other sites More sharing options...
Krakin Posted October 11, 2013 Report Share Posted October 11, 2013 That is Crazy low. Now test your speakers distortion. Some subs hit well over 10% A test on speaker distortion done by Aurthur C Ludwig Sr. Measured harmonic distortion Frequency 80 dB SPL 86 dB SPL 92 dB SPL 20 - 40 Hz 6% 8% 10% 100 - 200 Hz 1% 1% 1% 1000 - 5000 Hz 0.4% 1% 1.5% 5 - 10 kHz 0.14% 0.25% 0.44% http://www.silcom.com/~aludwig/EARS.htm Edit: had to fix table Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
WillistonAudioLabs Posted October 11, 2013 Author Report Share Posted October 11, 2013 I understand the distortion at the speaker, but you want to minimize THD in the signal path and a clean head unit can only help the overall SQ. Sure, there are a LOT of factors as to SQ and distortion in a system, but this test was just to show the RMS voltage and THD. Great point to make though, sort of puts things into perspective. Some people are measurement freaks, others prefer to use their ears...I'm in the middle, do both See my videos on YouTube http://www.willistonaudio.com Many tests and demos of OLD and NEW SCHOOL car audio gear! See cool pics on Instagram @oldschoolstereo Link to comment Share on other sites More sharing options...
Krakin Posted October 11, 2013 Report Share Posted October 11, 2013 I have just found that determining SQ from an amplifier's/speaker's output isn't a good form of judgement. I mean of course it's good to not have distortion, but distortion changes between every amplifier. Go listen to a quality tube amplifier, and then a quality solid state amplifier. Push each one into distortion. See which one you notice a change in sound quality first. Besides all that I am planning on getting an 80PRS soon, and I love to see that kind of input (output?) signal after 17ft of RCA's. Thanks for sharing your test man. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
smashedz28 Posted October 11, 2013 Report Share Posted October 11, 2013 Love my 80prs. Great sounding head unit with tons of control. Link to comment Share on other sites More sharing options...
Kyblack76 Posted October 11, 2013 Report Share Posted October 11, 2013 Nice job BigD SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.