Audison SPM4 - 4 Channel Stereo Passive Mixer

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 midrange/woofer and tweeter channels coming from the amplifier and supply one single mid-high channel. The Ch1(L/R) channels feature two inputs, one features an inverting input compared to Ch2 (L/R) 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-Eq). 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 - 25w RMS, 50w Peak
• Output Gain - -3 dB
• T.H.D. (input power max) - 0.5% (100Hz), 0.05% (1kHz), 0.05% (10kHz)
• Bandwidth - 15 ÷ 75kHz (-3dB)
• Crosstalk - > 55 dB (10kHz)
• Input impedance - 32 Ω
• Out impedance - 10 kΩ
• Phase inverter - Ch1 (left & right)
• W x H x D - 103.5mm x 36.5mm x 86.5mm (4.07" x 1.43" x 3.40")
• Weight - 0.24kg, 0.53 lb