Boss BX-4 4 Channel Stereo Mixer
The Boss 4 Channel Stereo Mixer BX-4 is a very compact and easy to use 4 channel mixer with gain, pan and volume controls for each input channel.
Great for a sub-mixer, keys, vocals, or a headphone/practice amp to mix drum machine or iPod or CD player.
Operates with either a standard 9 volt negative tip barrel type power adapter or a 9 volt battery (not include).
In original box.
$40 OBO. Shipping via USPS flat rate additional. I'd be more than happy to combine shipping with any other items I have for sale.
Boss BX-4 4 Channel Stereo Mixer 
