{"product_id":"audison-spm4-stereo-passive-mixer-unpowered","title":"Audison SPM4 Stereo passive mixer (unpowered)","description":"\u003cp\u003eStereo 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.\u003c\/p\u003e \u003cp\u003e\u003cbr\u003eSPM4 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\u003cbr\u003eoften gives better results when one of the two channels undergoes a 180° dephasing.\u003c\/p\u003e \u003cp\u003e\u003cbr\u003eSPM4 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.\u003c\/p\u003e \u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cstrong\u003eProduct Features:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e4-Channel stereo passive mixer\u003c\/li\u003e \u003cli\u003ePower range:\u003c\/li\u003e \u003cli\u003e \u003cul\u003e \u003cli\u003e25 Watts RMS\u003c\/li\u003e \u003cli\u003e50 Watts Peak Power\u003c\/li\u003e \u003c\/ul\u003e \u003c\/li\u003e \u003cli\u003eOutput Gain: -3 dB\u003c\/li\u003e \u003cli\u003eT.H.D(max input power): %(100Hz) 0.5 \/ %(1kHz) 0.05 \/ %(10kHz) 0.05\u003c\/li\u003e \u003cli\u003eBandwidth: 15 - 75k Hz (-3dB)\u003c\/li\u003e \u003cli\u003eCrosstalk: \u0026gt;55dB (10kHz)\u003c\/li\u003e \u003cli\u003eInput Impedance: 32 Ohms\u003c\/li\u003e \u003cli\u003eOut Impedance: 10 kOhms\u003c\/li\u003e \u003cli\u003ePhase inverter: Ch1 (L\u0026amp;R)\u003c\/li\u003e \u003c\/ul\u003e","brand":"Audison","offers":[{"title":"Default Title","offer_id":52760889196810,"sku":"SPM4","price":129.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0930\/4578\/4842\/files\/spm4-1.jpg?v=1774288108","url":"https:\/\/audiovisualworld.co.uk\/products\/audison-spm4-stereo-passive-mixer-unpowered","provider":"Audio Visual World","version":"1.0","type":"link"}