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What size volume potentiometer do I need given the following gear specifications?

Hi Folks, 

I'm looking to build my own passive volume control. My inspiration is the Emotiva Control Freak. From what I have found, it uses a Bourns 4-gang, 10k potentiometer. It seems to work well with my gear. Would I be correct in that I would use the same impedence pot (10k) if I build my own? Also, what brands do you guys recommend? I was thinking of an ALP blue velvet, TKD, or EIZZ? As for cabling, I'm going to use Mogami W2549 mic cable in 1 meter or less length. I'm looking to make XLR, as well as RCA at some point.   
  
GEAR & SPECS:
Odyssey Stratos Amp
Input Impedence: >10k ohms (manual), 47k ohms (magazine). 

Adcom GCD-750
Output Impedence: 50 ohms RCA / 100 ohms XLR
Output Voltage: 3.0 volts RCA / 6.0 volts XLR

Emotiva Control Freak (XLR)
Bourns 4-gang 10k pot. 
XLR cables. 
(Emailed Emotiva to see what cable they used. They said they use a type-b, high speed HDMI wire). 

Thanks, 
JSB

jsbach1685

Showing 1 response by georgehifi

georgehifi's avatar
georgehifi
10,312 posts
 

With a source 3v and output impedance of 50ohms, an amp input load impedance of 10kohms.

A 1kohm passive log stereo pot is the order of the day, and is properly impedance matched, input and output.

I would opt for an Alps Blue Velvet if they have one.

Couldn't find an Alps but you could try these.

http://www.jameco.com/1/1/51187-rv24bf-10-15r1-a1k-dual-audio-potentiometer-1k-%CF%89-resistors.html


http://cpc.farnell.com/1/1/29631-omeg-pc2g16eco1kb-pot-dual-gang-log-1k.html


Cheers George

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