I purchased and built a VTA ST-120 high gain and I got it with the 100k Stepped Attenuator option. I am really happy with this (both the amp and the attenuator). I have the amp on a coffee table in front of my couch. I have a 15 foot run of RCA running from my DVD, CD player, Cable TV Digital converter box etc. I keep the amp on the coffee table so I can just adjust volume without getting up and down.. Lazy, I know! I use this amp for everything now.. Even Cable TV and commercials have the volume levels all over the place.
I am getting a passive pre-amp. I want this so I can keep the amp on a rack with the CD player, Cable TV Digital converter etc and control the volume with a hand remote. I want the amp close to these pieces so I have short RCA runs to the passive preamp and then short RCA cord runs from the passive preamp to the ST120 amp.
So, I’m having Mapletree audio build me a passive amp. This will have a 24 step attenuator (100k ), and a BENT motor to turn the attenuator with a hand held remote. Then I’ll have a source select and 4 input sources…
The question… I have a 100k attenuator that came with the amp and it works perfect. I am having this passive preamp built with a 100k attenuator because the 100k works well for me now… I am having the passive preamp built with 2 parallel outputs (one pair of RCA outputs to the ST120 amp and the other pair to a sub woofer for times when I feel like turning it on). So, I was wondering if having the 2 parallel outputs impacts the choice of the 100k value on the attenuator… Should I be using a different value then the 100k? I was just assuming I should use the 100k as it works well now in my amp. I really don’t know much about the decision factors in when to use 50k or 100k or 250k to spec out the attenuator.
PS – Bob, if you have any detail on the decision factors that drove the choice of the 100k on the attenuator I’d be interested in hearing and learning.
As always, I appreciate the input Bob and all