4-channel stereo mixer

Ult-Sound JAM-4S - is a 4-channel stereo mixer.

Built using special low-noise audio operational amplifiers.
True hands-on control with dual-layer knobs for each channel.

When used with stereo signals, the knobs act as balance and volume controls for the L and R channels.
If nothing is patched into the B input, the A channel is automatically linked to B.
It works as a 4-channel stereo mixer, but can instantly reconfigure into:
- 4 channel mono-to-stereo converter
- dual independent 4-channel mono mixers with clearly separated A/B buses on the panel

https://www.ult-sound.com/product-page/ult-sound-jam-4s