{"product_id":"rcf-sub-708-as-mk3-18in-133db","title":"RCF SUB 708AS MK3 | 18in - 133 dB | Compact High-Power Active Subwoofer","description":"\u003ch2\u003eHigh-Output 18\" Powered Subwoofer for DJs and Live Sound\u003c\/h2\u003e\r\nThe \u003cstrong\u003eRCF SUB 708-AS MK3\u003c\/strong\u003e is a portable, high-power 18\" active subwoofer designed for live performances, DJs, and small to mid-sized venues. With 1400W of Class-D amplification, Bass Motion Control technology, and up to 133 dB max SPL, this rugged subwoofer delivers tight, controlled low-end with exceptional clarity and headroom.\r\n\r\n\u003ch2\u003eRCF SUB 708-AS MK3 Competitive Differences\u003c\/h2\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003eHigh-output 18\" woofer with 3\" voice coil and bass reflex cabinet\u003c\/li\u003e\r\n  \u003cli\u003e1400W Class-D amplifier with convection cooling—no fan required\u003c\/li\u003e\r\n  \u003cli\u003eUp to 133 dB SPL output with extended low-end response down to 35 Hz\u003c\/li\u003e\r\n  \u003cli\u003eAdvanced Bass Motion Control (BMC) for improved excursion management and phase response\u003c\/li\u003e\r\n  \u003cli\u003eSelectable crossover frequencies (80Hz \/ 120Hz) and polarity reverse switch\u003c\/li\u003e\r\n  \u003cli\u003eRugged Baltic birch cabinet with polyurea coating for touring use\u003c\/li\u003e\r\n  \u003cli\u003eRear panel DSP with volume, EQ, phase, and crossover controls\u003c\/li\u003e\r\n  \u003cli\u003eIdeal companion for 8\" and 10\" top speakers in portable PA setups\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch2\u003eRCF SUB 708-AS MK3 Description\u003c\/h2\u003e\r\nThe \u003cstrong\u003eRCF SUB 708-AS MK3\u003c\/strong\u003e is engineered to deliver professional low-frequency reinforcement in portable or installed sound systems. Its powerful 18” woofer is driven by a state-of-the-art ceramic magnet structure, delivering tight, punchy bass in a lightweight, compact format. With 1400W peak (700W RMS) power output and a frequency range from 35 Hz to 120 Hz, this subwoofer excels in music playback and live sound applications.\r\n\r\nRCF's innovative Bass Motion Control (BMC) replaces traditional high-pass filtering with a custom algorithm that maximizes low-frequency performance while preserving phase integrity. The result is a deeper, more accurate bass response with improved woofer stability and reduced distortion.\r\n\r\nBuilt for real-world use, the cabinet is made of Baltic birch plywood with a scratch-resistant polyurea finish. Ergonomic handles and an M20 pole mount make it easy to transport and integrate into any PA system. The rear panel includes comprehensive controls for crossover point selection, polarity, and EQ tailoring—giving users precise control over system tuning.\r\n\r\n\u003ch3\u003eSUB 708-AS MK3 Features\u003c\/h3\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003e1400 Watt Class-D amplifier (700W RMS)\u003c\/li\u003e\r\n  \u003cli\u003e18” woofer with 3” voice coil in bass reflex housing\u003c\/li\u003e\r\n  \u003cli\u003eBass Motion Control excursion management for extended low-end clarity\u003c\/li\u003e\r\n  \u003cli\u003eStereo XLR input and output with selectable high-pass output\u003c\/li\u003e\r\n  \u003cli\u003eSwitchable crossover frequencies: 80Hz \/ 120Hz\u003c\/li\u003e\r\n  \u003cli\u003ePolarity reverse switch\u003c\/li\u003e\r\n  \u003cli\u003eRear panel volume, EQ, polarity, and crossover controls\u003c\/li\u003e\r\n  \u003cli\u003eSoft limiter and thermal\/RMS protection circuitry\u003c\/li\u003e\r\n  \u003cli\u003eEnergy-efficient convection cooling design (fanless)\u003c\/li\u003e\r\n  \u003cli\u003eM20 threaded pole mount\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003eSUB 708-AS MK3 Specifications\u003c\/h3\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003eFrequency Response: 35 Hz – 120 Hz\u003c\/li\u003e\r\n  \u003cli\u003eMax SPL @ 1m: 133 dB\u003c\/li\u003e\r\n  \u003cli\u003eWoofer: 18” with 3.0” voice coil\u003c\/li\u003e\r\n  \u003cli\u003eAmplifier Power: 1400 W Peak \/ 700 W RMS\u003c\/li\u003e\r\n  \u003cli\u003eInput Connectors: Stereo XLR (balanced\/unbalanced)\u003c\/li\u003e\r\n  \u003cli\u003eOutput Connectors: Stereo XLR (line \/ high pass)\u003c\/li\u003e\r\n  \u003cli\u003eInput Sensitivity: -2 dBu \/ +4 dBu\u003c\/li\u003e\r\n  \u003cli\u003eCooling: Convection (fanless)\u003c\/li\u003e\r\n  \u003cli\u003eCabinet Material: Baltic birch plywood\u003c\/li\u003e\r\n  \u003cli\u003eGrille: Steel with acoustic fabric backing\u003c\/li\u003e\r\n  \u003cli\u003eHandles: Two (one on each side)\u003c\/li\u003e\r\n  \u003cli\u003eMounting: M20 threaded pole mount\u003c\/li\u003e\r\n  \u003cli\u003eColor: Black\u003c\/li\u003e\r\n  \u003cli\u003eProduct Dimensions (H x W x D): 27.28 x 19.88 x 26.97 in (693 x 505 x 685 mm)\u003c\/li\u003e\r\n  \u003cli\u003eProduct Weight: 89.51 lbs (40.6 kg)\u003c\/li\u003e\r\n  \u003cli\u003eShipping Dimensions (H x W x D): 28.94 x 22.24 x 29.33 in (735 x 565 x 745 mm)\u003c\/li\u003e\r\n  \u003cli\u003eShipping Weight: 100.53 lbs (45.6 kg)\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"RCF","offers":[{"title":"Default Title","offer_id":50181811896602,"sku":"114808","price":1585.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/2714\/9082\/files\/rcf-sub-708-as-mk3--18in---133-db.webp?v=1756142098","url":"https:\/\/squarecable.com\/products\/rcf-sub-708-as-mk3-18in-133db","provider":"SquareCable","version":"1.0","type":"link"}