{"product_id":"bmw-3-series-e30-front-rear-jbl-concert-a704-amp-2-x-stage3-527-speakers-audio-upgrade","title":"BMW 3 Series E30 Front \u0026 Rear JBL Concert A704 Amp +  2 x STAGE3 527 Speakers Audio Upgrade","description":"\u003cp\u003e\u003cstrong\u003eThis bespoke package includes the following equipment:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e2 x Pairs JBL STAGE3 527 - 5.25\" 2-Way Coaxial Speakers 400W Total Power\u003c\/li\u003e \u003cli\u003eJBL Concert A704 - 4 Channel AB Class Bridgeable Car Amplifier\u003c\/li\u003e \u003cli\u003eWiring Kit 8 Gauge\u003c\/li\u003e \u003cli\u003e5 Sheets 2mm Thick 390 X 250 Mm Sound Deadening\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e \u003cem\u003eThis package is for vehicles without Factory Tweeter mounts \u0026amp; vehicles with an aftermarket stereo with at least 2 RCA pre-outs. if you are using the factory stereo then you would need the item below.\u003c\/em\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eJBL Concert A704 - 4 Channel AB Class Bridgeable Car Amplifier:\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eConcert sound and elegant design\u003c\/span\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan class=\"\"\u003e\u003cstrong\u003ePowerful Class AB Amplifier\u003c\/strong\u003e\u003cbr\u003eClass AB amplifier output stage combines the advantages of the Class A amplifier and the Class B amplifier while minimizing low efficiency and distortion.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eAdjustable High-Pass\/Low-Pass Crossover Filter\u003c\/strong\u003e\u003cbr\u003eConcert amps feature the High-Pass Filter (HPF) and the Low-Pass Filter (LPF), which allow you to adjust the frequency from 40 Hz to 400 Hz based on your own musical taste to deliver the correct music frequencies to speakers.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eAuto power on feature\u003c\/strong\u003e\u003cbr\u003eWhen using the high level signal inputs, the amplifier will automatically turn on when a DC offset is detected (\u0026gt;2.5 volts). When using the line-level signal inputs, the amplifier will also turn on when a +12V signal is detected from the external enable wire.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eEfficient Cooling Design\u003c\/strong\u003e\u003cbr\u003eThe high-performance amplifiers are not only powerful but also compact and feature an efficient cooling design.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eConcert sound and elegant design\u003c\/strong\u003e\u003cbr\u003eJBL Concert amplifiers deliver an extraordinary sound experience and have an elegant industrial design.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eReliable performance\u003c\/strong\u003e\u003cbr\u003eTo deliver high-quality sound and reliable performance, the Concert amplifiers use high-quality components such as audio capacitors and power MOSFET. The amplifiers also have to undergo a rigorous testing process that unstable amplifiers would not survive. \u003cspan class=\"goog-text-highlight\"\u003eJBL freezes them, bakes them, shakes them, exposes them to ultraviolet light and tests them at full power for days.\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan class=\"\"\u003e\u003cspan class=\"goog-text-highlight\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e \u003cem\u003eThis package is for vehicle without Factory Tweeter mounts \u0026amp; vehicles with an aftermarket stereo with at least 2 RCA pre-outs. if you are using the factory stereo, then you would need the item below.\u003c\/em\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e\u003cspan class=\"goog-text-highlight\"\u003eProduct Features:\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e4-Channel Class AB Car Amplifier\u003c\/li\u003e \u003cli\u003eRated Power RMS Output:\u003c\/li\u003e \u003cli\u003e70W x 4 @ 4 ohm\u003c\/li\u003e \u003cli\u003e90W x 4 @ 2 ohm\u003c\/li\u003e \u003cli\u003e180W x 2 @ 4 ohm bridged,\u003c\/li\u003e \u003cli\u003e\u0026lt;1%THD\u003c\/li\u003e \u003cli\u003eFull\/High-Pass\/Low-Pass Filter:\u003c\/li\u003e \u003cli\u003e40-400Hz, 12dB\/octave\u003c\/li\u003e \u003cli\u003eSN Ratio (1W @ 4 ohms): \u0026gt;75dB\u003c\/li\u003e \u003cli\u003eFrequency Response (-3dB):10Hz – 45kHz\u003c\/li\u003e \u003cli\u003eGross weight: 2.86kg\u003c\/li\u003e \u003cli\u003eUK Authorised Internet Dealer\u003c\/li\u003e \u003cli\u003eFull Manufacturer's Warranty\u003c\/li\u003e \u003cli\u003eNext-day Delivery Available\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhat's in the box:\u003c\/strong\u003e\u003c\/p\u003e \u003cdiv class=\"\"\u003e \u003cul\u003e \u003cli\u003e4-Channel amplifier\u003c\/li\u003e \u003cli\u003eFour 30A fuses (2 installed\/2 spares)\u003c\/li\u003e \u003cli\u003e4 Speaker wire to RCA adapters\u003c\/li\u003e \u003cli\u003eFour 2-1\/8\" screws\u003c\/li\u003e \u003cli\u003eLogo badge w\/ adhesive backing\u003c\/li\u003e \u003cli\u003eOwner's manual (Eng\/Span\/Fren\/Others)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eJBL STAGE3 527 - 5.25\" 2-Way Coaxial Speakers:\u003c\/strong\u003e\u003c\/p\u003e \u003cdiv class=\"\"\u003e \u003cp\u003e\u003cstrong\u003ePlus One™ Woofers Cones\u003c\/strong\u003e\u003cbr\u003eHarman’s patented (US patent #7,548,631) Plus One™ polypropylene woofer cones provide increased cone area of up to 35% by moving the attachment point between the surround and the frame outward. The benefit of this technology is an increase in overall efficiency by up to 2dB. This provides superior output and performance when used as an upgrade to a factory system and also for a pure aftermarket system with outboard amplification.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eEdge-driven dome tweeter\u003c\/strong\u003e\u003cbr\u003eEdge-drive dome tweeters on 5-1\/4\" speakers deliver a broader and smoother high-frequency response. Engineered to Fit Close attention to fitment is paramount to the success of this speaker family. External Crossover with 0\/+2dB Tweeter level control. To allow for further system tuning, a 0\/+2dB tweeter level control has been providing an allowance for adjustment based on tweeter location.\u003c\/p\u003e \u003cp\u003e\u003cbr\u003e\u003cstrong\u003eVented basket Frame design\u003c\/strong\u003e\u003cbr\u003eThe super-rigid vented baskets help to cool the voice coils making for a reliable speaker. Not only do these look cool but they provide a real-world benefit by wicking heat away from the motor structure almost like a fan as the cone moves through its stroke. The benefits are lower distortion at high output levels, a longer-lasting speaker and higher power handling.\u003c\/p\u003e \u003cp\u003e\u003cbr\u003e\u003cstrong\u003eCompetitively Tuned\u003c\/strong\u003e\u003cbr\u003eFor most brands, off-the-shelf speakers and a cursory approval of frequency response curves are good enough. That’s not the case with JBL. We don’t only listen to our speakers against the competition – we voice them against each other to ensure each line has the consistent JBL sound signature that’s known and sought out by those who care about their audio. This is just part of an extensive development process undertaken by some of the best transducer\u003cbr\u003eengineers in the world to provide the finest listening experience at\u003cbr\u003eany price point.\u003c\/p\u003e \u003cdiv id=\"readMoreContent\" class=\"\"\u003e \u003cp\u003e\u003cstrong\u003eProduct Features:\u003c\/strong\u003e\u003c\/p\u003e \u003c\/div\u003e \u003c\/div\u003e \u003cul\u003e \u003cli\u003e5-1\/4\" 2-way Coaxial Car Speakers\u003c\/li\u003e \u003cli\u003ePower Handling:\u003c\/li\u003e \u003cli\u003ePeak: 180 watts per pair \/ 90 watts each\u003c\/li\u003e \u003cli\u003eRMS: 60 watts per pair \/ 30 watts each\u003c\/li\u003e \u003cli\u003ePlus One™ polypropylene woofer cones\u003c\/li\u003e \u003cli\u003eRubber speaker surround\u003c\/li\u003e \u003cli\u003ePEI (Polyetherimide) Dome Tweeters\u003c\/li\u003e \u003cli\u003eExternal Crossover with 0\/+2dB Tweeter level control\u003c\/li\u003e \u003cli\u003eVented basket Frame design\u003c\/li\u003e \u003cli\u003eTop-mount Depth: 2-3\/16\"\u003c\/li\u003e \u003cli\u003eCutout Dimensions: 4.47\"\u003c\/li\u003e \u003cli\u003eImpedance: 3 ohms\u003c\/li\u003e \u003cli\u003eFrequency Response: 70 - 20,000 Hz\u003c\/li\u003e \u003cli\u003eSensitivity: 91 dB @2.83V\u003c\/li\u003e \u003cli\u003eFree-Air Resonance (Fs): 95.9 Hz\u003c\/li\u003e \u003cli\u003eEquivalent Compliance (Vas): 4.13 liters\u003c\/li\u003e \u003cli\u003eTotal Speaker Q Value (Qts): 1.39\u003c\/li\u003e \u003cli\u003eElectrical Q Value (Qes): 1.55\u003c\/li\u003e \u003cli\u003eMechanical Q Value (Qms): 13.54\u003c\/li\u003e \u003cli\u003eCrossover Point: 6,000 Hz\u003c\/li\u003e \u003cli\u003eAuthorised UK Internet Dealer\u003c\/li\u003e \u003cli\u003eFull Manufacturer's Warranty\u003c\/li\u003e \u003cli\u003eNext-day Delivery Available\u003c\/li\u003e \u003c\/ul\u003e \u003cdiv class=\"\"\u003e \u003cp\u003e\u003cstrong\u003eWhat's in the Box:\u003c\/strong\u003e\u003c\/p\u003e \u003cdiv class=\"\"\u003e \u003cul\u003e \u003cli\u003eTwo 2-way speakers\u003c\/li\u003e \u003cli\u003e2 Grilles\u003c\/li\u003e \u003cli\u003eEight 1\" Screws\u003c\/li\u003e \u003cli\u003e8 Speed clips\u003c\/li\u003e \u003cli\u003e2 Strips of grille putty\u003c\/li\u003e \u003cli\u003eInstallation manual\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003cp\u003e \u003c\/p\u003e","brand":"JBL","offers":[{"title":"Default Title","offer_id":52761308168458,"sku":"CONCERT-A704+STAGE3527+SKINZ+8G","price":329.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0930\/4578\/4842\/files\/concert-a704_stage3527_skinz_8g_1.jpg?v=1774294780","url":"https:\/\/audiovisualworld.co.uk\/products\/bmw-3-series-e30-front-rear-jbl-concert-a704-amp-2-x-stage3-527-speakers-audio-upgrade","provider":"Audio Visual World","version":"1.0","type":"link"}