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NAD C 326BBE
NAD C 326BBE
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Old 5th December 2019, 05:49 PM   #11
scoobis is offline scoobis
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I was hoping someone had gone down this road before and could tell me if there is any audible difference between the caps used and the cap types I was talking about.
Also maybe some insight on the original 3020.
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Old 5th December 2019, 10:16 PM   #12
Douglas Blake is offline Douglas Blake  Canada
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Quote:
Originally Posted by zapbuzz View Post
I dont agree with Douglas
Oh really??? ... LOL.

You do make an excellent argument and I am not totally in disagreement.

Of late, since retiring, I've been messing with the little Chinese class D chip amps and I've had problems with the bulk supply electrolytics in some of them. Even had a couple explode on me. In particular the 25v caps running on 24v supplies are problematic, so I know they're substandard. So now when I bring in a mini-amp I just automatically swap them out, with 35 volt parts and usually going up a couple of standard values in the process.

I am not adverse to re-capping. Lets say that you have a piece of older gear on your bench and you spot a bulgy cap or one with abnormally high AC ripple on it... Sure I'll swap it, and all the others in similar positions as well, particularly in power supplies.

What I find kind of laughable is the guy who gets a brand new amp, opens it up and starts swapping out parts. Now unless there is a known issue --as with the chip amps-- this just strikes me as a horrible waste of time and money. It's asymptomatic repair and it risks causing other problems in a brand new piece of kit.

For the sonic differences along the signal path... look up "Confirmation Bias" ... "they told me this would be better" so when you turn it on you believe it is. Often as not there is absolutely no measurable difference whatsoever when simply replacing non-faulty parts. It's like these guys who try to tune up their systems with patch cords or think that wire lifts will help the sound... it's all a matter of what you expect to hear.

So... we're not entirely on opposite sides here... It's just that I think the "replace everything" philosophy is a bit overdone.
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Last edited by Douglas Blake; 5th December 2019 at 10:32 PM.
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Old 6th December 2019, 05:36 PM   #13
webfors is offline webfors  Canada
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Interesting, I have a 320BEE sitting for years under a cover in the basement. Probably bought it around 2003. Do the caps age without use? That amp has not had much use at all.
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Old 6th December 2019, 06:19 PM   #14
Mark Tillotson is offline Mark Tillotson
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They can't dry out nearly as fast it kept cold. But deterioration of the insulating layer is likely to happen. Careful re-forming might improve longevity after storage (its advised for high voltage electrolytics to avoid high leakage at first use)


They age quickest run hot (inside unventilated boxes, with high ripple currents to heat them up internally) - so off the shelf ought to be better than used, all else being equal.
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Old 6th December 2019, 06:25 PM   #15
Electoneman is offline Electoneman
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I have never been able to hear a difference between capacitor brands / models. Nichicon makes great caps, but boy do they milk the "audio" cap thing. It's like trying to decipher a puzzle with all their models. FW, FG, KW, KZ, KA, KT, etc. Personally I like using PW everywhere unless a low leakage cap is spec'd - in that case, KL. Never had an issue, never noticed a difference.
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Old 6th December 2019, 06:44 PM   #16
Douglas Blake is offline Douglas Blake  Canada
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Quote:
Originally Posted by Electoneman View Post
I have never been able to hear a difference between capacitor brands / models. Nichicon makes great caps, but boy do they milk the "audio" cap thing. It's like trying to decipher a puzzle with all their models. FW, FG, KW, KZ, KA, KT, etc. Personally I like using PW everywhere unless a low leakage cap is spec'd - in that case, KL. Never had an issue, never noticed a difference.
Given that audio frequencies are the lowest on the spectrum, the "audio" designation on a capacitor could be a degradation of their normal functionality. But the audiophiles love this stuff, for whatever ill conceived reason.

Like you, I don't hear a difference and I've never been able to measure one either.
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