CD player --> active speakers volume control
Hi there folks. Just came across this forum, and it looks like a great place to pick up some tips on home audio. I like to make my own music, so I've got a pair of Tannoy reveal active monitors for mixing. Last week someone gave me an old CD player (Technics 490) as I didn't have a decent one. Unfortunately, the phono output level is way too high for my active speakers, so I'm trying to build my own simple volume control. Could anyone suggest what kind of potentiometer I should look at for this task? Any help would be very gratefully received.
Cheers,
mike
Hi there folks. Just came across this forum, and it looks like a great place to pick up some tips on home audio. I like to make my own music, so I've got a pair of Tannoy reveal active monitors for mixing. Last week someone gave me an old CD player (Technics 490) as I didn't have a decent one. Unfortunately, the phono output level is way too high for my active speakers, so I'm trying to build my own simple volume control. Could anyone suggest what kind of potentiometer I should look at for this task? Any help would be very gratefully received.
Cheers,
mike
Hi Mike and welcome to diyAudio.
There are several options, depending on how complex you want to get. Have a search on Passive Pre(amps) for some opinions. As for a pot, personally speaking, Alps Blue Velvet is a good start, or if you just have a problem with one channel, then you could sort your problem with a couple of resistors soldered inside your connectors. Search for attenuator pad.
There are several options, depending on how complex you want to get. Have a search on Passive Pre(amps) for some opinions. As for a pot, personally speaking, Alps Blue Velvet is a good start, or if you just have a problem with one channel, then you could sort your problem with a couple of resistors soldered inside your connectors. Search for attenuator pad.
Terrific stuff chaps, thanks very much
I'd pretty much decided that something along the lines of a blue velvet dual channel pot would work nicely. Simple enough for me. Does the rating of the pot affect the maximum level of attenuation? I mean, is it critical that I choose, say, a 10k pot over a 50k?
It's great fun this DIY audio. Might just have to get into it..!
Thanks again.
mike
I'd pretty much decided that something along the lines of a blue velvet dual channel pot would work nicely. Simple enough for me. Does the rating of the pot affect the maximum level of attenuation? I mean, is it critical that I choose, say, a 10k pot over a 50k?
It's great fun this DIY audio. Might just have to get into it..!
Thanks again.
mike
IMO it doesn't matter that much when the response vs rotation curve is spoiled. I always set the loudness levels acoording to my ears and not to my eyes. I therefore even use a linear APLS in my "passive preamp".
Linear pots have the advantage that they have better channel similarity (don't know better words for that) than log types.
But the pot value definitely affects the upper cutoff-frequency by forming an RC lowpass together with the capacity of the cable connected to it.
My pot is a 10k type giving a worst-case cutoff-frequency of 200 kHz together with the low capacitance cable that I use.
Regards
Charles
Linear pots have the advantage that they have better channel similarity (don't know better words for that) than log types.
But the pot value definitely affects the upper cutoff-frequency by forming an RC lowpass together with the capacity of the cable connected to it.
My pot is a 10k type giving a worst-case cutoff-frequency of 200 kHz together with the low capacitance cable that I use.
Regards
Charles
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