Audison SPM4 4-Channel Stereo Passive Mixer

Stereo passive mixer (unpowere") 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 midrange/woofer and tweeter channels coming from the amplifier and supply one single mid-high channel. The Ch1(L/") channels feature two inputs, one features an inverting input compared to Ch2 (L/") channels; the mixing process often gives better results when one of the two channels undergoes a 180° dephasing. SPM4 is especially recommended to extend the number of inputs of the Audison digital processors or amplifiers with built-in DSP because they feature a De-equalizer (De-E"). In that case, any possible non-linear acoustic emissions due to the mixing of the pre-existing filtered channels are duly compensated.

Technical Specifications

• Max input power W (rm"): 25
• Max input power W (pea"): 50
• Output Gain dB: -3
  • % (100H"): 0.5
• Crosstalk dB (10kH"): > 55
• Input impedance: 32
• Out impedance k: 10
• Phase inverter: Ch1 (left & right)
• W x H x D mm: 103,5 x 36,5 x 86,5
• Weight kg: 0,24