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Amp Camp Amp - ACA
Amp Camp Amp - ACA
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Old Yesterday, 11:32 PM   #6071
Extreme_Boky is offline Extreme_Boky
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Join Date: Dec 2003
Quote:
Originally Posted by oc11 View Post
Hello Anand

I know you kindly sent a link to Nelson Pass' statements saying that the ACA output is the same for the stereo version as for the monoblock. However, if you go to the ACA KIt 1.6 entry (sold out) in the diyaudio store and scroll down to the specifications you will find it clearly stated that the output for the stereo version is 8w per channel and the output for the monoblock version is 15w per channel. So, the output doubles even though the gain per (? board) stays the same. What am I missing here?
Differential signal halves will now receive an ACA, each - double the power at the point of summation = speakers, albeit for 8 and 16-ohm speaker impedance. However, a damping factor will decrease...

Parallel: the input signal is fed equally to both ACA's. Everything stays the same, current capability of the output stage increases - better for 4 ohms (and lower) impedance. The input impedance will be half. The damping factor will increase -> opens the possibility to go to 14 dB gain on each ACA
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Old Today, 02:03 AM   #6072
oc11 is offline oc11  United States
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Thank you so very much 6L6, I will continue the plans with no changes to the values in the schematic. I really am grateful for your help.

To clarify the point of the musicality of the capacitors, I used the descriptions of features and functionality provided in the data sheets of the manufacturers. The 3300 Chemi cons datasheet did not mention audio or music. The Nichicons did make a primary point about the use of these products for high-grade audio equipment. That is all. The other two mods I will do will be installing Allo CMs and increasing the ventilation of the units by drilling additional vents in the top and bottom plates.

Again, thank you very much.
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Old Today, 04:13 AM   #6073
6L6 is offline 6L6  United States
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Amp Camp Amp - ACA
SYclotron Audio | Why are people obsessed with coupling caps?

SYclotron Audio | Why are people obsessed with coupling caps? Part 2

That said, I still stand by what I said earlier - the fancy parts are pretty.

Last edited by 6L6; Today at 04:15 AM.
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Old Today, 05:25 AM   #6074
oc11 is offline oc11  United States
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No question you are right, you know this stuff in and out and I do not. However, I do not see any harm done other than throwing some of my money, not much, down the drain. As always, I appreciate your knowledge which you share freely helping us.
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Old Today, 06:18 AM   #6075
ThermalAlchemy is online now ThermalAlchemy  United States
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Default ESR TEST OF 10uF and 1000uF

One of the qualifications of a high-quality audio capacitor is ESR and lower is supposed to be better ?. This is what I found comparing Nichicon, and the kit caps. When trying to get fancy larger big-name capacitors will you changing amp camp amp smooth tubey like sound for a more sterile fast acting sound?. I guess this is what experimentation is for an exactly what this amplifier in brings out the tinker in every person learning by trial and fire 🔥. Every time I read one of my questions get answered 10 more take its place. Look at the photos below my tester for an ESR meter DER EE DE-5000 Below photos show the capacitors been tested
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Old Today, 08:09 AM   #6076
Extreme_Boky is offline Extreme_Boky
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Choosing a sound coupling cap is the exercise that should be performed purely by listening to the end result. One should choose what best suits his system and his listening preferences. Metalized film capacitors, especially a mix of silver and gold, will have a more pleasing sound, that provides for an enjoyable listening, compared to low ESR electrolytes that measure "good", for example. Dipped in oils/waxes and specifically wound and finished/encapsulated... everything will make a noticeable difference that can't be measured, but it can be heard.

Even the latest First Watt amplifiers use a shiny nice looking white, film, sound-coupling capacitors with "PASS" written on it. And we all know the saying... if it's good for Mr Pass, it must be good for the rest of the mortals.
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