Spiug31 Posted November 15, 2009 Report Posted November 15, 2009 I'm looking around for a very clear/transparent balanced volume control with attenuation in ≤2dB steps, across the range -40dB to -85dB (though if it went to -100dB that would be a bonus). This is for feeding my balanced beta22, my source has a low output impedance. putting a fixed attenuator before my present goldpoint attenuator would mean it could start at -40 but couldn't cover the whole range in ≤2dB steps. transformers/autoformers appear not to go this low options I can see are maybe: MiniVol MiniVol PGA2320 Volume Control - error404's Audio DIY Endeavours though I'm no good at coding lcduino1 The LCDuino-1 display I/O processor once it gets finished Anyone know of some more ? budget for an ideal fit would be
cetoole Posted November 16, 2009 Report Posted November 16, 2009 Penny and Giles RF15. Though if you really only need the range of -40 to -85dB, methinks you have way too much gain in your rig, and would be better served by first rectifying that.
luvdunhill Posted November 16, 2009 Report Posted November 16, 2009 custom stepped attenuator I think would be your best option..
Spiug31 Posted November 16, 2009 Author Report Posted November 16, 2009 The gain of the balanced beta22 is 2 (so effectively 4), the present source I have is set for +4dB. I've not spotted any recommended amps that operate at less than unity gain and most sources get made for +4dB or -10dB, either way I'll likely need attenuation. The world is loud looking at the RF15 pdf http://www.controldevicesaudio.com/FaderPDF/RF15.pdf it seems that it goes to -60dB then rapidly drops to its -90dB cut-off in the space of rotating 14 degrees.
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now