LP3-2 L.O.C. PRO Series 2-Channel Line Output Converter

I used on speaker outputs on a vintage receiver for proper connectivity with a subwoofer that contains one pair of RCA inputs. Fast shipping. Overall great product, it even included a tiny screwdriver for setting voltage on the unit!

Used this to tap into speaker wire even tho my amp can take a high level signal, I recommend going this route instead. Sounds great and zero static or hum, buy it!

Worked perfectly as opposed to another brand I won't mention

I bought this unit to facilitate adding a line-level output onto our LeGrand OnQ Digital whole-house audio system. The individual keypad amplifiers for each room are of the non-common ground type and only have speaker level outputs (no aux or line level outputs). One must be careful using devices like this on non-common ground amps. Some designs use only a very simple circuit employing only resistors and can cause damage to amplifiers of that type. I took the over off this unit when I received it and was pleased to find that it uses transformer-coupled circuits, which is the correct method for non-common ground amps. It works perfectly and does exactly what I wanted. I'm using this device to drive an auxilliary 4-channel headphone amplifier in my music room. Now my musician friends and I can don headphones and play along with whatever music is being played over our home audio system, and actually hear both ourselves and the music. Perfect for what I wanted to accomplish.

It works. It also brings in some hum. It might be caused by the really old vintage receiver I'm using that causes it in combination with the convertor, but this unit provides a ground wire which when I connect it to the fm ground on the back of the receiver, it really cuts down on the hum. So I'm pretty pleased.