Very good but some notifications.
I installed this board to and old Pioneer A-77x amplifier. It performs very well and without any extra interference/noise. I recommend this item. It has 6 channels max, which is great.
Notice:
-It is recommend to solder the protection diodes between the relay coil legs. This board misses them.
-The switcher I got had mistakenly soldered wires between legs 3 and 4. I had to re-solder them into the correct order.
Verified purchase: YesCondition: New