{"product_id":"ruthless-audio-800-4-4-channel-amplifier","title":"Ruthless Audio 800.4 4 Channel Amplifier","description":"\u003cp\u003eWhen your speaker build calls for four powerful channels and flexible tuning, consider the \u003cstrong\u003eRuthless Audio 800.4 4-Channel Amplifier\u003c\/strong\u003e. This full-size Korean Class-D model is distinct from the 800.4 Micro: it offers a published \u003cstrong\u003e220W x 4 at 2 ohms\u003c\/strong\u003e, bridgeable channels, locking RCA inputs, and a clip light. Use it for front and rear speakers, a component stage, or a properly matched bridged setup.\u003c\/p\u003e\n\n\u003cp\u003eAt 14.4V, the listed ratings are \u003cstrong\u003e220W x 4 @ 2 ohms\u003c\/strong\u003e, \u003cstrong\u003e100W x 4 @ 4 ohms\u003c\/strong\u003e, and \u003cstrong\u003e440W x 2 bridged @ 4 ohms\u003c\/strong\u003e. \u003cstrong\u003eTiffany-style locking RCA inputs\u003c\/strong\u003e help keep signal leads seated, while \u003cstrong\u003e4 AWG power inputs\u003c\/strong\u003e accept the indicated cable size. The onboard \u003cstrong\u003eclip light\u003c\/strong\u003e offers a visual clipping warning, though it does not replace proper gain-setting measurements. Input sensitivity is 0.2V–6V and the stated operating range is 8–16V. The published THD figure is less than 0.01% at 4Ω.\u003c\/p\u003e\n\n\u003cp\u003eThe crossover controls support different speaker arrangements: high-pass adjustment from 20Hz–800Hz, or 200Hz–8kHz with the x10 setting; low-pass adjustment from 50Hz–800Hz, or 500Hz–8kHz with x10. That gives you useful options for a speaker stage or a bridged channel pair. The listing recommends a 100A fuse; check the manufacturer's instructions and size the power run and protection for your installation.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the Ruthless Audio 800.4 4-Channel Amplifier?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e220W x 4 @ 2 Ohms\u003c\/strong\u003e — Listed four-channel RMS output at 14.4V for speakers with suitable power handling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e440W x 2 Bridged @ 4 Ohms\u003c\/strong\u003e — Two bridged pairs offer another configuration when your drivers and final loads match the rating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKorean Class-D Design\u003c\/strong\u003e — The listed amplifier class and construction for this full-size model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiffany-Style Locking RCA Inputs\u003c\/strong\u003e — Locking RCA connections help keep cables secure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 AWG Power Inputs\u003c\/strong\u003e — Power terminals sized for 4-gauge cable; plan the full run and grounding accordingly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClip Light Function\u003c\/strong\u003e — A visible signal-clipping indicator to assist with setup and monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrossover Controls with x10 Setting\u003c\/strong\u003e — HPF 20Hz–800Hz or 200Hz–8kHz; LPF 50Hz–800Hz or 500Hz–8kHz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD \u0026lt; 0.01% @ 4Ω\u003c\/strong\u003e — A published distortion specification for the stated load.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAmplifier \u0026amp; Wiring Recommendations\u003c\/h2\u003e\n\u003cp\u003eMatch the 800.4 to component or coaxial speakers with the right impedance and RMS handling for its actual channel output. Supply a compatible four-channel RCA signal from your head unit or DSP. The listing calls for 4-gauge power and ground wiring and recommends a 100A fuse; confirm cable length, fuse placement, and protection with the manufacturer's guidance. Keep connections secure and route signal cables away from power wiring where practical to help reduce noise.\u003c\/p\u003e\n\u003cp\u003eIf bridging, confirm a minimum 4Ω load per bridged pair and speakers or subwoofer suited to the listed 440W output. The clip light is a useful warning while setting gain, but music dynamics and source levels vary. Follow a proper gain-setting procedure, ideally using appropriate test equipment, instead of treating the light going out as a guarantee that the entire system cannot clip. An upstream DSP can add time alignment, EQ, and additional crossover control when your build needs it.\u003c\/p\u003e\n\n\u003ch2\u003eFull Specifications\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRMS Power @ 4Ω (14.4V)\u003c\/td\u003e\n\u003ctd\u003e100W x 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRMS Power @ 2Ω (14.4V)\u003c\/td\u003e\n\u003ctd\u003e220W x 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBridged Power @ 4Ω (14.4V)\u003c\/td\u003e\n\u003ctd\u003e440W x 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier Class\u003c\/td\u003e\n\u003ctd\u003eClass-D (Korean)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e4 (Bridgeable to 2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Pass Filter\u003c\/td\u003e\n\u003ctd\u003e20Hz–800Hz \/ 200Hz–8kHz (x10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Pass Filter\u003c\/td\u003e\n\u003ctd\u003e50Hz–800Hz \/ 500Hz–8kHz (x10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.01% @ 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Sensitivity\u003c\/td\u003e\n\u003ctd\u003e0.2V – 6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRCA Inputs\u003c\/td\u003e\n\u003ctd\u003eTiffany-Style Locking RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Input Gauge\u003c\/td\u003e\n\u003ctd\u003e4 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClip Light\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e8–16V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Fuse\u003c\/td\u003e\n\u003ctd\u003e100A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 Year Standard \/ 2 Year Extended Available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cem\u003eNote: Physical dimensions are not included in this listing. Contact us for the full spec sheet before planning a tight installation.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between the Ruthless Audio 800.4 and the 800.4 Micro?\u003c\/strong\u003e\u003cbr\u003eA: This full-size 800.4 is listed at 220W x 4 into 2Ω and includes locking RCA inputs, 4 AWG power terminals, a clip light, and x10 crossover settings. The compact 800.4 Micro is listed at 200W x 4 into 2Ω with a 9.25\" overall length. Compare the detailed specs and available mounting space before choosing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What wiring kit do I need for the Ruthless Audio 800.4?\u003c\/strong\u003e\u003cbr\u003eA: The listing recommends 4-gauge power and ground cable and a 100A fuse. Confirm the cable sizing and fuse location for your vehicle and installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I bridge the 800.4 to run a subwoofer?\u003c\/strong\u003e\u003cbr\u003eA: Yes. A bridged pair is rated at 440W into 4Ω at 14.4V. You can reserve another pair for speakers if the rest of your system is configured appropriately; maintain at least the specified bridged impedance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I use the clip light to set my gain?\u003c\/strong\u003e\u003cbr\u003eA: Use it as a clipping warning while following the manufacturer's gain-setting instructions. A DMM or oscilloscope and a suitable test signal can provide a more controlled setup than adjusting gain by ear or by the indicator alone.\u003c\/p\u003e","brand":"Ruthless Audio","offers":[{"title":"No","offer_id":46315128094764,"sku":null,"price":289.99,"currency_code":"USD","in_stock":true},{"title":"Yes","offer_id":46315128127532,"sku":null,"price":289.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/8964\/9196\/files\/xdxdxctryjr.png?v=1790793813","url":"https:\/\/www.4staraudio.com\/products\/ruthless-audio-800-4-4-channel-amplifier","provider":"4StarAudio","version":"1.0","type":"link"}