Stealth caps

[triode12]

Originally Posted by joeling

Gents,

I bought the Stealth caps from Parts Connexion.

I have increased the output capacitance from the original 10microfarad to 30microfarad. 10 from the factory Teflon & 20 from the Stealth caps.

This is done specifically to address the lack of bass issue when matched with my Gryphon Mephisto which has a lowish input of 20K ohm as opposed to the ARC norm of 100K for their power amps.

Thanks - they were formerly unobtainable and only available to manufacturers.

[MPS]

Originally Posted by Boone

The V caps website has a calculator for figuring cap value based on input impedance of an amplifier.
No guess work involved.

Coupling Capacitor Calculator by V-Cap

Boone

Nice. so for 20k input impedance 3.9uF capacitor is required for optimal frequency response down to 20Hz. I believe ARC is typically using higher capacitance than required considering that 20k is minimum recommended input impedance.

One could consider V-Cap CuTF for extreme performance level, so using 4uF capacitance by paralleling 4*1uF capacitors for each output, total amount of capacitors is 16 pcs at $328/piece for total amount of $5248

[joeling]

Yes I used the V Cap calculator. However, based on that, 10 microfarad should be more than enough. So, I think Gryphon's input impedance is either overstated or there is some other interaction that I am not smart enough to figure out.

Anyway, adding the additional 20micro farad for the case of Gryphon has improved things quite a bit - although still cannot beat the Naim Statement in the bass department

[Boone]

joeling,

I'm wondering if the improved bass performance is more of a result of the sonic signature of the Stealth caps as opposed to the added capacitance. Either way I'm glad it is an improvement for you.

Boone