{"product_id":"helix-d-four-4-channel-520-watts-peak-power-amplifier-with-active-crossover","title":"HELIX D FOUR - 4 Channel 520 Watts Peak Power Amplifier with Active Crossover","description":"\u003cdiv id=\"old_extended\"\u003e \u003cp\u003eThe new entry into the HELIX world! The amplifiers of the D series are solely modest with respect to pricing. Everything else is thoroughly pure HELIX quality without any compromises. Loads of power, excellent measurement data and a whole bunch of features ensure a pristine and crispy sound experience!\u003c\/p\u003e \u003cp\u003eAbsolutely nothing has been missed for powerful sound reproduction - the active crossover with a highpass filter, lowpass filter, bandpass and bass boost are equally as self-evident as the intelligent high-level input that incorporates Audiotec Fischer´s proprietary ADEP circuit. It is even possible to add an optional volume remote control for the amp channels C and D which is very useful if those outputs are firing a subwoofer. \u003cbr\u003e\u003cbr\u003eThe elegant design not only states right from the beginning of the amp's heritage but also allows easy integration into your car thanks to its compact dimensions. That is sound-tuning at its best!\u003c\/p\u003e \u003cdiv class=\"product-icons\"\u003e \u003c\/div\u003e \u003cdiv class=\"product-icons\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: medium;\"\u003eProduct Features:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e \u003cdiv class=\"product-icons\"\u003e \u003cul\u003e \u003cli\u003e4-channel high- and low-level input\u003c\/li\u003e \u003cli\u003eSmart high-level input with ADEP circuit (Advanced Diagnostics Error Protection) and Auto Turn-On function\u003c\/li\u003e \u003cli\u003eFully active crossover with highpass, lowpass, bandpass and bass boost\u003c\/li\u003e \u003cli\u003eExtremely stable MOSFET power supply\u003c\/li\u003e \u003cli\u003e“Input mode” switch for flexible input signal routing\u003c\/li\u003e \u003cli\u003eHigh-level input sensitivity up to 14 Volts max.\u003c\/li\u003e \u003cli\u003eCable remote control for volume adjustment of the channels C \u0026amp; D optionally available\u003c\/li\u003e \u003cli\u003eMassive aluminum heatsink for best cooling conditions\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: medium;\"\u003eSpecial Features:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eSmart high-level input\u003cbr\u003eThe latest generation of OE car radios incorporates sophisticated possibilities of diagnosing the connected speakers. If a common amplifier will be hooked up failure messages and loss of specific features (e.g. fader function) quite often appears - but not with the D FOUR.\u003cbr\u003eThe new ADEP circuit (Advanced Diagnostics Error Protection) avoids all these problems without loading the speaker outputs of the OE radio during high volumes unnecessarily.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: medium;\"\u003eSpecifications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e \u003ctable border=\"0\" cellspacing=\"0\" cellpadding=\"0\"\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eOutput power RMS \/ max.\u003c\/td\u003e \u003ctd valign=\"top\"\u003e \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003e- @ 4 Ohms\u003c\/td\u003e \u003ctd valign=\"top\"\u003e4 x 65 \/ 130 Watts\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003e- @ 2 Ohms\u003c\/td\u003e \u003ctd valign=\"top\"\u003e4 x 90 \/ 180 Watts\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003e- @ 1 Ohm\u003c\/td\u003e \u003ctd valign=\"top\"\u003e- \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003e- bridged @ 4 Ohms\u003c\/td\u003e \u003ctd valign=\"top\"\u003e2 x 180 \/ 360 Watts\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003e- bridged @ 2 Ohms\u003c\/td\u003e \u003ctd valign=\"top\"\u003e- \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eAmplifier technology\u003c\/td\u003e \u003ctd valign=\"top\"\u003eClass AB\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eInputs\u003c\/td\u003e \u003ctd valign=\"top\"\u003e4 x RCA \/ Cinch\u003cbr\u003e4 x Highlevel speaker input\u003cbr\u003e1 x Remote In\u003cbr\u003e1 x Remote control input\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eInput sensitivity\u003c\/td\u003e \u003ctd valign=\"top\"\u003eRCA \/ Cinch 0.5 - 6 Volts\u003cbr\u003eHighlevel 1 - 14 Volts\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eInput impedance RCA \/ Cinch\u003c\/td\u003e \u003ctd valign=\"top\"\u003e30 kOhms\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eInput impedance highlevel\u003c\/td\u003e \u003ctd valign=\"top\"\u003e12 Ohms\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eOutputs\u003c\/td\u003e \u003ctd valign=\"top\"\u003e4 x Speaker output\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eOutput voltage RCA \/ Cinch\u003c\/td\u003e \u003ctd valign=\"top\"\u003e- \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eSignal converter for digital input\u003c\/td\u003e \u003ctd valign=\"top\"\u003e- \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eFrequency response\u003c\/td\u003e \u003ctd valign=\"top\"\u003e10 Hz - 50.000 Hz\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eBass boost\u003c\/td\u003e \u003ctd valign=\"top\"\u003e0 - 12 dB \/ 45 Hz\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eHighpass\u003c\/td\u003e \u003ctd valign=\"top\"\u003e15 Hz - 4,000 Hz adjustable\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eLowpass\u003c\/td\u003e \u003ctd valign=\"top\"\u003e40 Hz - 4,000 Hz adjustable\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eBandpass\u003c\/td\u003e \u003ctd valign=\"top\"\u003e15 Hz - 4,000 Hz adjustable\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eSubsonic\u003c\/td\u003e \u003ctd valign=\"top\"\u003e- \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003ePhase\u003c\/td\u003e \u003ctd valign=\"top\"\u003e- \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eSlope high- \/ lowpass\u003c\/td\u003e \u003ctd valign=\"top\"\u003e12 dB\/Oct.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eSlope subsonic \/ lowpass\u003c\/td\u003e \u003ctd valign=\"top\"\u003e- \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eSignal-to-noise ratio digital input\u003c\/td\u003e \u003ctd valign=\"top\"\u003e- \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eSignal-to-noise ratio analog input\u003c\/td\u003e \u003ctd valign=\"top\"\u003e108 dB (A-weighted)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eDistortion (THD)\u003c\/td\u003e \u003ctd valign=\"top\"\u003e0.02 %\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eDamping factor\u003c\/td\u003e \u003ctd valign=\"top\"\u003e65\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eOperating voltage\u003c\/td\u003e \u003ctd valign=\"top\"\u003e9.6 - 16 Volts\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eIdle current\u003c\/td\u003e \u003ctd valign=\"top\"\u003e1000 mA\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eFuse\u003c\/td\u003e \u003ctd valign=\"top\"\u003e2 x 25 A Maxi-fuse (APX)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eAdditional features\u003c\/td\u003e \u003ctd valign=\"top\"\u003eActive, adjustable crossover, bass boost, input mode switch, highlevel input with automatic turn on function and Advanced Diagnostics Error Protection (ADEP), optional cable remote control\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd valign=\"top\"\u003eDimensions (H x W x D)\u003c\/td\u003e \u003ctd valign=\"top\"\u003e53 x 320 x 230 mm \/ \u003cbr\u003e2.09 x 12.60 x 9.06”\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003cdiv class=\"product-icons\"\u003e \u003c\/div\u003e \u003c\/div\u003e","brand":"HELIX","offers":[{"title":"Default Title","offer_id":52760707891466,"sku":"D FOUR","price":179.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0930\/4578\/4842\/files\/helix-d-four-1.png?v=1774286788","url":"https:\/\/audiovisualworld.co.uk\/products\/helix-d-four-4-channel-520-watts-peak-power-amplifier-with-active-crossover","provider":"Audio Visual World","version":"1.0","type":"link"}