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anewmission

Need help with DIY passive pre

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I have started ordering parts to build my rca switch/passive pre

 

I'm going to have 5 pairs of rca inputs. I ordered and elma rotary switch. So all those parts are fine.

 

What I would like to do is add a 2 or 3 way switch, and a volume pot

 

So from the rotary switch it goes to the2/3 way switch

 

I want one of the switch position to completely bypass the volume pot. And the other position to run through the pot. I might get a black beauty.

I suck at drawing diagrams and I don't have any apps that do it.

 

The other thing is that I would love to have two sets of outputs.... Is this possible with no power?

 

And how do I split the wiring for the volume pot and bypassing the volume pot?

 

Black beauty or a dact

 

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Posted (edited)

Sorry didn't read it all

Edited by georgehifi

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Posted (edited)
12 hours ago, anewmission said:

The other thing is that I would love to have two sets of outputs.... Is this possible with no power?

Yes it's possible, but it all depends on your amp input impedance load and your source output impedance load

 

Cheers George

Edited by georgehifi

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Yes it's possible, but it all depends on your amp input impedance load and your source output impedance load
 
Cheers George
Thanks George. Is there a stereo in two stereo out type converter that would fit. Or would I need to double the wiring at the two way switch.

This is my attempt at a dual mono/ passive pre/ HT bypass and switch.

All simple in theory, and shouldn't damage the sound if I do it correctly

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Or there could be another elma rotary switch that has two outputs?

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Those are very nice. Maybe dual mono isn't what I meant. Dual stereo outputs is what I mean. So I can use separate power amps one for the speakers and one for the subs.

Those switches are nice. I know with the parts I'm ordering I'm getting a+++ quality and it's going to end up being under $100

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Posted (edited)
54 minutes ago, anewmission said:

Maybe dual mono isn't what I meant. Dual stereo outputs is what I mean.

Just use a pair of these, that's what I use for my 2 x bi-amped ME850's

https://www.ebay.com.au/itm/PRO-2-x-RCA-Y-SHAPE-SPLITTER-1-MALE-PLUG-to-2-FEMALE-SOCKETS-AV-ADAPTER-GOLD/202706925775?epid=4028164814&hash=item2f324638cf:g:r7gAAOSwUDZcmJ2X

 

Cheers George

Edited by georgehifi

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It will just cut the output impedance in half?

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10 hours ago, anewmission said:

Dual stereo outputs is what I mean. So I can use separate power amps one for the speakers and one for the subs.

 

9 hours ago, anewmission said:

It will just cut the output impedance in half?

It's no different to having two pairs of rca outputs on a passive preamp

 

Cheers George

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