{"product_id":"audison-bit-spm4","title":"Audison bit SPM4 4-Channel Stereo Passive Mixer","description":"\u003cp\u003e\u003cstrong\u003eAudison bit SPM4 4-Channel Stereo Passive Mixer — 4 Inputs, 2 Outputs for Active OEM Multi-Way Systems\u003c\/strong\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003eThe Audison bit SPM4 is an unpowered 4-input, 2-output stereo passive mixer designed for active OEM multi-way systems, where each speaker is driven by its own amplified channel. It mixes the midrange\/woofer and tweeter channels coming from the factory amplifier into one single mid-high channel, using four audio transformers developed for very low distortion and a highly linear response. It is especially recommended for adding input channels to Audison processors and DSP amplifiers that use de-equalization.\u003c\/p\u003e\r\n\r\n\u003ch4\u003eKey Features\u003c\/h4\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e4 input channels mixed down to 2 output channels (one stereo pair)\u003c\/li\u003e\r\n\u003cli\u003eFour audio transformers for very low distortion and linear response\u003c\/li\u003e\r\n\u003cli\u003eUnpowered (passive): no power connection needed\u003c\/li\u003e\r\n\u003cli\u003eCh1 (L\/R) inputs include an inverting input to apply a 180° phase shift, which often gives better mixing results\u003c\/li\u003e\r\n\u003cli\u003eMaximum input power: 25 W RMS \/ 50 W peak\u003c\/li\u003e\r\n\u003cli\u003eDesigned to work with the de-equalizer in Audison processors and amplifiers with built-in DSP\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch4\u003ePower and Technical Highlights\u003c\/h4\u003e\r\n\u003cp\u003eOutput gain is -3 dB, frequency response is 15 Hz – 75 kHz (-3 dB), and distortion is 0.05% at 1 kHz and 0.5% at 100 Hz. Input impedance is 32Ω, and the retailer-listed size is 103.5 x 36.5 x 86.5 mm. With a DSP's de-equalizer in the chain, any non-linear response caused by mixing already-filtered channels is compensated.\u003c\/p\u003e\r\n\r\n\u003ch4\u003eIdeal For \/ System Fit\u003c\/h4\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eFactory systems with separate amplified tweeter and midrange\/woofer channels\u003c\/li\u003e\r\n\u003cli\u003eExtending the input count of an Audison bit processor or Forza bit amplifier\u003c\/li\u003e\r\n\u003cli\u003eInstalls where only two inputs are available on the processor\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003eNot an active mixer or amplifier: it only mixes signals passively, and it works best when a de-equalizing processor follows it.\u003c\/p\u003e\r\n\r\n\u003ch4\u003eInstallation Note\u003c\/h4\u003e\r\n\u003cp\u003eWhen an SPM4 is used with Audison bit processors (bit One, bit Ten, AP bit), the ART function is disabled, so use channels 1 and 2 of the processor on the head-unit high-level outputs that are not connected to the SPM4.\u003c\/p\u003e\r\n\r\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\r\n\u003cp\u003e1 x Audison bit SPM4 4-channel stereo passive mixer (confirm the supplied accessories with your supplier)\u003c\/p\u003e\r\n\r\n\u003ch4\u003ePrecautions\u003c\/h4\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eDo not exceed the 25 W RMS \/ 50 W peak maximum input power\u003c\/li\u003e\r\n\u003cli\u003eThe ART (automatic remote turn-on) function is disabled when the SPM4 is used with Audison bit processors\u003c\/li\u003e\r\n\u003cli\u003eTry the phase of the inverting input to find the best mixing result\u003c\/li\u003e\r\n\u003cli\u003eProfessional installation and tuning are recommended\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch4\u003eAudison bit SPM4 vs. Active Mixing\u003c\/h4\u003e\r\n\u003ctable\u003e\r\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eAudison bit SPM4\u003c\/th\u003e\n\u003cth\u003eActive Mixing Stage\u003c\/th\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003eUnpowered (passive)\u003c\/td\u003e\n\u003ctd\u003eNeeds power\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eMixing method\u003c\/td\u003e\n\u003ctd\u003eFour audio transformers\u003c\/td\u003e\n\u003ctd\u003eElectronic circuit\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e4 inputs to 2 outputs\u003c\/td\u003e\n\u003ctd\u003eVaries by model\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003ePhase option\u003c\/td\u003e\n\u003ctd\u003eInverting input on Ch1 for 180° shift\u003c\/td\u003e\n\u003ctd\u003eVaries by model\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eOEM multi-way systems with a de-equalizing DSP\u003c\/td\u003e\n\u003ctd\u003eGeneral signal summing\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003c\/table\u003e\r\n\r\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\r\n\u003cp\u003e\u003cstrong\u003eWhat is the Audison bit SPM4 used for?\u003c\/strong\u003e\u003cbr\u003eIt mixes separate midrange\/woofer and tweeter channels from a factory system into a single mid-high channel.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eDoes it need power?\u003c\/strong\u003e\u003cbr\u003eNo. It is a passive, unpowered mixer.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eHow many inputs and outputs does it have?\u003c\/strong\u003e\u003cbr\u003e4 inputs and 2 outputs (stereo).\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eWhy does it have an inverting input?\u003c\/strong\u003e\u003cbr\u003eMixing often works better when one of the two channels is phase-shifted by 180°.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eWhat power can it handle?\u003c\/strong\u003e\u003cbr\u003e25 W RMS and 50 W peak at the input.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eWhich processors does it suit?\u003c\/strong\u003e\u003cbr\u003eAudison digital processors and amplifiers with built-in DSP that use a de-equalizer.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eDoes it affect the ART function?\u003c\/strong\u003e\u003cbr\u003eYes. ART is disabled when the SPM4 is used with Audison bit processors.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eIs it an amplifier?\u003c\/strong\u003e\u003cbr\u003eNo. It only mixes signals and adds no gain (output gain is -3 dB).\u003c\/p\u003e\r\n\r\n\u003ch4\u003eProduct Specifications\u003c\/h4\u003e\r\n\u003ctable\u003e\r\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eAudison bit SPM4 Stereo Passive Mixer\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e4 inputs \/ 2 outputs\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eMax input power\u003c\/td\u003e\n\u003ctd\u003e25 W RMS \/ 50 W peak\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eOutput gain\u003c\/td\u003e\n\u003ctd\u003e-3 dB\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eFrequency response\u003c\/td\u003e\n\u003ctd\u003e15 Hz – 75 kHz (-3 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eDistortion\u003c\/td\u003e\n\u003ctd\u003e0.05% @ 1 kHz; 0.5% @ 100 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAudison\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003c\/table\u003e\r\n\r\n\u003cp\u003e\u003cstrong\u003eMake factory multi-way systems work with your Audison processor — order the Audison bit SPM4 today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Dolphin Accessories","offers":[{"title":"Default Title","offer_id":67828079624420,"sku":null,"price":26991.0,"currency_code":"INR","in_stock":false}],"url":"https:\/\/dolphinaccessories.com\/products\/audison-bit-spm4","provider":"DolphinAccessories ","version":"1.0","type":"link"}