Audison SPM4

4 Channel Stereo Passive Mixer Stereo passive mixer (unpowered) featuring 4 input channels and 2 output channels, designed for active OEM multi-way systems where each speaker is powered by one specific amplified channel. SPM4 mixes audio through 4 audio transformers specifically developed to achieve very low distortion and highly linear acoustic response. SPM4 provides the ability to mix the midrangewoofer and tweeter channels coming from the amplifier and supply one single mid-high channel. ...