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What? Absolutely untrue. First, let's accept the premise that neutral/transparent performance is the goal.OK, now, if you change the output capacitors (they are in parallel, this is a low pass filter L/C), and the amplifier becomes more neutral/transparent, then that is an improvement in performance, not a "different flavor" sound. First, understand how a capacitor degrades sonic performance: the dialectric absorbs some signal, and then releases it in a delayed fashion. This time delayed release of the signal smears the sound, degrading it from absolute transparency. The closer the capacitor comes to "perfect" performance, the less smearing of the input signal, and the closer the amp is to absolute transparency.It is a mistake to assume that changing an output filter capacitor cannot impove the performance in an absolute sense (improved transparency).
First show us some measurements before and after the cap switch. Then prove any objective improvements are actually audible.
Sure, to an engineer it'd seem silly, but to my ears I'd be fine with having little gardens of capacitors.
Sorry cab, in this case it can all be measured by changing the capacitors.
Twaddle. EEs are quite aware that the constraints of an LC lowpass filter, preventing them from functioning ideally is the IWC (interwinding capacitance) of the inductor, and the ESL (equivalent series inductance) of the cap(s). And they obviously know that paralleling caps lowers net ESL, as they tend to be quite good at high school algebra. Paralleling caps has been used by engineers for decades in RF, digital and ps applications.http://www.n4iqt.com/BillRiley/multi/esr-and-bypass-caps.pdfhttp://www.ultracad.com/esr.htm
Now do our ears say the same thing? Well given that the type of noise they filter, any reduction, even in what we typcially think of as neglegent amounts in theory, might be an improvement. Which is what everyone is saying to be true that listens to the mod.Cab, what about trying to prove it is not audible?
Cab,I think the issue here is somebody going to the time and expense doing this to prove something that may or may not matter for a 10 dollar upgrade. I would guess the only way to get a true call on this would be to have Hypex actually do the test and post their results.So trying to squeeze juice from a stone on this forum does not look like it will get the results necessary to end the debate. The original poster obviously never had the intent to get "Professional" results measured from this change, but simply was giving some DIY guys the heads up he thought it was a nice improvement.I could understand the resistance to it more if this was someone trying to sell you a 1000 dollar upgrade to modules cost about that much, but in this case they are not.
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