Anyone have experience with this unit? It would simplify my voicing process. That’s the only time it’d be used, so power handling isn’t super important. Mainly just to quickly A/B/C speakers. Externally appears identical to the $60 Monoprice unit
This type of device often runs your speaker audio through a set of transformers, so not very Hi-Fi.
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Tell that to the tube guys…
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Those transformers in that kind of matching selector can add as much as 32 ohms to your loudspeaker impedance.
Low Fidelity enthusiasts can fight me.
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Bummer. Thanks for the info.
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https://www.amazon.com/gp/product/B0BZNPKM9C/ref=ewc_pr_img_2?th=1
Add a 12v power supply and some binding post and you have a remote A/B switcher.
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Interesting Ken. I was actually wanting something remote.
are those clean enough and handle enough power to run audio? Would it work for a preamp level signal?
I have used a similar Parasound speaker switch. It is pretty clean if you don’t use the impedance protection feature. It looks like it can be switched off on the Audtek unit.
12v 10A=120 watts per leg so 240 watts max. No relay is perfect but they are still used in almost every intigrated amplifier for both speaker selection and protection.
They should work for signal as well. Ideally you wouldnt switch the relays while playing music to avoid any carbon build up but to be honest we arent listening at levels where any of these are real concerns.
If you were going to do switching berween signal and speakers you should add a volume pot on the signal outputs so you could level match for better A/B comparisons.
If your serious I could probably whip up a scematic. Might even have some parts.
I have two integrated amps. If it would work for signal level, I could use the amp’s built in volume controls for level matching. That’s actually the PITA I’m dealing with now. The speakers I’m A/B’ing are about 7db different in sensitivity, so every time I want to switch between them using a single amp with two speaker outputs I have to go back to a noise track and level match SPL. If I could switch at the signal level, I could level match the two separate integrated amp’s volumes and then just switch back and forth to A/B.
It is not $20, but I bought the Fosi L30 speaker/amplifier switcher and it has been a game changer for my voicing routine. Not simply the switching, but the REMOTE control switching. I can switch back and forth instantaneously, whereas if I had to get up and push the A/B button it would be much harder to compare. (It looks like it is about $150 now, I think I got it for closer to $100 on Cyber Monday.)
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I was trying to not spend that kind of money. Does the Fosi unit let you level match speakers?
As you have realized, the level matching is crucial. The L30 allows you to have two amps (A/B) and two pairs of speakers (1/2). For listening in mono I just run one amplifier to Speaker 1 and another amplifier with the volume adjusted appropriately to Speaker 2 and switch 1/2 with the remote. For stereo I run Amp A to the pair of Speakers 1 and Amp B to Speaker pair 2. On the remote, Amp A/B is Left/Right and Speakers 1/2 are Up/Down I can quickly switch from A and 1 to B and 2.
PE has the L30 for $143 and @6thplanet just posted that they have 15% off for the rest of February. (Not that I’m trying to have you part with your money 
).
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Wanna borrow my switcher?
I need to get one of these LC30’s. The one with orange meters is about $10 cheaper too. Looks like this would work to quickly A/B switch between two monophonic VCAD 3-way crossover variants using EQ APO and a 6 channel amplifier. EDIT: I just checked the owner’s manual, and this will only switch out a VCAD 2-way crossover, not 3-way. Boo.
Of note, the Fosi should likely not be used with tube amps.
I think it’s a good option. I’m just cheap 
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