A question about amplifier selector switches, valve amps and splitting sources. [Archive]

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Mandryka

12-11-2020, 18:46

I have one source (a DAC), two amps (a Radford valve amp and a Rotel transistor amp) and two speakers (JR149s). I want to be able to switch between the amps easily (to save the valves)

I think I could use this Beresford switch -- it looks suitable for the Radford even if I accidently turn it on with no speakers connected (but I'm not totally sure.)

http://www.homehifi.co.uk/S/tc-7210.htm

Could I get the source into the amps just by using a pair of splitter leads like these?

https://www.amazon.co.uk/dp/B000LB299S/?tag=pinkfishmedia-21

Macca

12-11-2020, 18:54

Yes the splitter box is okay and does say it provides a dummy load so no issue with the Radford.

Yes, you can use Y splitters to run the source into two amps.

Mandryka

12-11-2020, 19:00

Thanks, and I think I’ve put this into the wrong part of the forum. Sorry.

I wasn’t sure about the Y splitters. I am not using a preamp. The DAC outputs 2V. Will each prong of the Y get half of this?

Macca

12-11-2020, 20:14

Firebottle

13-11-2020, 07:40

Both amps will get the full output level. The Dac will have a low enough output impedance to drive both amps without problem.

Mandryka

13-11-2020, 09:27

Thanks gentlemen.

Edward

13-11-2020, 10:07

I use a Y splitter such as these (https://www.amazon.co.uk/Gold-Plated-RCA-Phono-Splitter/dp/B00J5N3YHY).

How are you controlling volume without a preamp? Via the DAC?