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Connect two audio amplifiers with Co-axial Cable

Paddycol

I want to connect two audio amplifiers in different rooms  so the output from Amplifier 1 can be input to Amplifier 2 and sent on to loudspeakers connected to Amplifier 2. 

The rooms are on opposite ends of the house so running a cable is not an option.

There is already standard co-axial cable ports in both rooms that can be connected in the attic - this was originally intended for TV signals.

Amplifier 1 ( Technics Su-V570 PSX Caps) has a Phones Out port. 

Amplifier 2 (Pioneer SX-N30AE) has several Analog Audio in ports and also has a Digital Co-Axial in Port  

My question is - can I connect the co-axial cable via a suitable adapter from the Phones Out port of Amplifier 1 into either the Analog Audio in OR the Digital-Co-Axial in(using an analog-digital converter) on Amplifier 2 ?

Would the sound quality deteriorate significantly ?

  • 0

    Hi,
    You could try it, but won't it be mono, unless you have two co-ax cables in each room that you can patch.

    There is a fair chance it may pick up noise, since you're talking about many tens of meters of cable running literally through an entire home, but it's a quick thing to rule it in/out if you already have this cable installed.

    If you can send it digitally then that could be good (there are various products to send and receive wirelessly for instance, or using network connections) then that could be another option, but then you probably cannot sync the audio too easily (if that is what you're trying to do). Sonus etc will to some degree sync the sound in different rooms, but those are overall different systems compared to analog amplifiers intended for connection to analog stereo sources.

    You could sent it analog with more chance of decent quality over that distance (compared to the coax), but ordinarily would require a different setup, with twisted wire (which can be low-cost, for example CAT-5 cable). To do that, you'd use a transformer to convert to a balanced output. But this won't help if you're using coax.

  • 0
    1. Deteriorate significantly depends on your taste for hi fi :-) .    I have a Scott receiver whose output feeds into a Carver magnetic amp. That setup requires an impedance bridge between the two to match expected impedances. This situation is similar, the headphone output is maybe expecting a 4-16 ohm load , your 2nd amp audio inputs maybe hi impedance expecting 200 mV signal. Sorry i didnt check ur amps spec.  I also have used an ipod to feed into a receiver input, the ipod cant drive headphones, only earbuds, so that works well. I did like Shabaz's idea of an a/d converter on the amp1 side and a d/a before amp2. Not sure if that exists, but I do have an optical out on a fire tv that i have an adapter to convert to analog into the same stereo i mentioned. It may take some more research to find those adapters.
  • 0

    You can use a low cost audio-to-SPDIFF converter which will encode stereo onto coax. If your #2 amp has an SPDIFF input (it sounds like it does), it is a matter of using a suitable connector. If not, you would need an SPDIFF-to-audio converter at the other end. It should retain fairly high fidelity. Note it should only run less than 10 meters.