Video test sound of P101 AMP of Rod Elliott

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#2
First, I think a welcome to the forum is in order but I have to ask; are you kidding? How can anyone hear and compare the sound quality of power amplifiers unless they are powering identical loudspeakers, playing in a standard environment like a proper sound studio or suitably large, similar room and furnishings? You might think it sounds as good as any you've heard played at home or at some other venue but how can you honestly compare the sound when it then has to replay through through whatever storage system, amplifier, speakers, listening environment and selection of program material you are currently using to make comparisons with?

Each element of the audio system will add its own "colour" to the sound and this means you'll have little or no idea of whether the amplifier sound differences are disceranble at all, coloured by the re-recording/playback effects or swamped by your own loudspeaker effects.
FWIW, P101 sounds good because (a) its a lateral mosfet design that usually happens to sound good and (b) Rod happens to know and applies a bit more than textbook electronic theory when it comes to audio power amp design and construction. These can be subtle sound effects and likely won't be obvious or perhaps become distorted somewhat when processed a second time.
 
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#3
Ian Finch said:
First, I think a welcome to the forum is in order but I have to ask; are you kidding? How can anyone hear and compare the sound quality of power amplifiers unless they are powering identical loudspeakers, playing in a standard environment like a proper sound studio or suitably large, similar room and furnishings? You might think it sounds as good as any you've heard played at home or at some other venue but how can you honestly compare the sound when it then has to replay through through whatever storage system, amplifier, speakers, listening environment and selection of program material you are currently using to make comparisons with?

Each element of the audio system will add its own "colour" to the sound and this means you'll have little or no idea of whether the amplifier sound differences are disceranble at all, coloured by the re-recording/playback effects or swamped by your own loudspeaker effects.
FWIW, P101 sounds good because (a) its a lateral mosfet design that usually happens to sound good and (b) Rod happens to know and applies a bit more than textbook electronic theory when it comes to audio power amp design and construction. These can be subtle sound effects and likely won't be obvious or perhaps become distorted somewhat when processed a second time.
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Thanks for your interest in this topic, I know the playback sound won't be as good as hearing the amplifier review live but I can't find a single video that talks about DIY or hears or records any music about it's performance, there are many videos about P3A, DOZ but not P101 when it gives better sound quality.
 
#4
P3A and DoZ are usually built as relatively cheap amps. Many here have tried to design and post their own P3A boards to save money but that's seldom very successful unless the designer already has plenty of experience with power amp. boards. P101 as now shown, is a full step up in cost and power requirements and the PCB is designed as part of a clamp holding the output mosfets to the heatsink. The mosfets are also becoming difficult to source and expensive, compared to audio BJTs, which makes the project less attractive if you're on a tight budget.

It's only my personal opinion, but both P3A and 101 are great sounding and useful amps. Theyre different but equally good sounding, to my ears.
 
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