{"product_id":"jbl-sma-4750-4-channel-bridgeable-class-d-amplifier","title":"JBL SMA-4750 4 Channel Bridgeable Class-D Amplifier","description":"\u003c!-- ======================================================\n\n     JBL SMA-4750 4 Channel Bridgeable Class-D Amplifier\n     — AL (bh-*) HTML\n\n     Two-Column Layout (Overview left \/ Specifications right)\n\n     Long-tail keyword used 5×:\n     “JBL SMA-4750 4 Channel Bridgeable Class-D Amplifier”\n\n     Content HTML only — Product schema handled by Shopify\/theme\n\n     ====================================================== --\u003e\n\n\u003cstyle\u003e\n\n  .bh-wrap{max-width:1100px;margin:0 auto;padding:1rem 1.25rem;line-height:1.6}\n\n  .bh-eyebrow{letter-spacing:.08em;text-transform:uppercase;font-size:.8rem;opacity:.7}\n\n  .bh-title{font-size:3rem;margin:.25rem 0 1rem}\n\n  .bh-sub{font-style:italic;margin:0 0 1.25rem}\n\n  .bh-grid{display:grid;gap:1.25rem}\n\n  @media(min-width:900px){.bh-grid{grid-template-columns:1.3fr .7fr;align-items:start}}\n\n  .bh-section{margin:2rem 0}\n\n  .bh-bullets{list-style:disc;padding-left:1.25rem;margin:.5rem 0 0}\n\n  .bh-specs{width:100%;border-collapse:collapse}\n\n  .bh-specs th,.bh-specs td{border:1px solid #e5e7eb;padding:.65rem;vertical-align:top}\n\n  .bh-specs th{width:42%;background:#f8fafc;text-align:left}\n\n  .bh-badge{display:inline-block;border:1px solid #e5e7eb;border-radius:999px;padding:.2rem .6rem;margin:.15rem .3rem 0 0;font-size:.85rem}\n\n  .bh-badges{margin-top:.5rem}\n\n  .bh-faq details{border:1px solid #e5e7eb;border-radius:.5rem;padding:.75rem 1rem;margin:.5rem 0;background:#fafafa}\n\n  .bh-faq summary{font-weight:600;cursor:pointer}\n\n  .bh-note{font-size:.95rem;opacity:.9}\n\n  .bh-condition{display:inline-block;border:1px solid #e5e7eb;border-radius:999px;padding:.3rem .75rem;margin:.5rem 0 0;font-size:.85rem;background:#fafafa}\n\n\u003c\/style\u003e\n\n\u003cdiv class=\"bh-wrap\"\u003e\n\n\u003cspan class=\"bh-eyebrow\"\u003eJBL SYNTHESIS\u003c\/span\u003e\n\n\u003ch1 class=\"bh-title\"\u003eJBL SMA-4750 4 Channel Bridgeable Class-D Amplifier\u003c\/h1\u003e\n\n\u003cp class=\"bh-sub\"\u003e4-channel Class D power amplifier • 750W into 8Ω • 1,500W into 4Ω • 2,500W bridged into 8Ω • 96kHz\/32-bit DSP • Dante\/AES67 ready • balanced XLR inputs • 2U rack-mount design\u003c\/p\u003e\n\nThe \u003cstrong\u003eJBL SMA-4750 4 Channel Bridgeable Class-D Amplifier\u003c\/strong\u003e is a powerful and highly configurable multichannel amplifier engineered for premium JBL Synthesis home theater systems. Delivering up to 750 watts into 8 ohms or 1,500 watts into 4 ohms, the SMA-4750 provides the output and control required for demanding LCR speakers, surrounds, height channels, and high-performance subwoofer applications while occupying only 2U of rack space.\n\nFor systems requiring even greater output, adjacent amplifier channels can be bridged to deliver up to 2,500 watts into an 8-ohm load. An integrated high-resolution DSP suite provides EQ, delay, and limiter functionality, while balanced XLR inputs, Dante\/AES67 digital audio networking capability, IP monitoring and control, 12V triggers, and robust binding-post outputs make the SMA-4750 particularly well suited to professionally designed and integrated immersive audio systems.\n\n\u003cdiv class=\"bh-grid\"\u003e\n\n\u003cdiv\u003e\n\n\u003csection id=\"features-and-tech\" class=\"bh-section\"\u003e\n\n\u003ch2\u003eKey Features \u0026amp; Innovations\u003c\/h2\u003e\n\n\u003cul class=\"bh-bullets\"\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eHigh-powered four-channel Class D amplification\u003c\/strong\u003e — the \u003cstrong\u003eJBL SMA-4750 4 Channel Bridgeable Class-D Amplifier\u003c\/strong\u003e delivers up to 750 watts into 8 ohms or 1,500 watts into 4 ohms, providing substantial output capability for demanding JBL Synthesis loudspeakers and subwoofers.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2,500-watt bridged output capability\u003c\/strong\u003e — adjacent amplifier channels can be bridged to provide up to 2,500 watts into an 8-ohm load, making the SMA-4750 exceptionally flexible for high-power LCR and subwoofer applications.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e96kHz \/ 32-bit floating-point DSP\u003c\/strong\u003e — high-resolution digital signal processing provides extensive control over the amplifier's input and output signals while maintaining the precision expected from a reference-level theater system.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eIntegrated EQ, delay \u0026amp; limiters\u003c\/strong\u003e — the onboard DSP suite allows professional integrators to fine-tune loudspeaker performance, timing, and protection parameters for the specific JBL Synthesis system and listening environment.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDante \/ AES67 digital audio networking\u003c\/strong\u003e — networked digital audio capability enables compatible multichannel audio signals to be distributed over Ethernet, simplifying signal routing in advanced JBL Synthesis installations.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBalanced XLR analog inputs\u003c\/strong\u003e — four balanced XLR connections provide robust analog signal transmission and make the amplifier an excellent match for premium AV processors equipped with balanced outputs.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eHigh damping factor\u003c\/strong\u003e — a damping factor greater than 1,000 from 20Hz to 100Hz gives the amplifier excellent electrical control over connected loudspeaker drivers, particularly in demanding low-frequency applications.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCustom-installation focused design\u003c\/strong\u003e — IP monitoring and control, 12V trigger input and output, rack mounting, flexible DSP configuration, and side-to-side cooling make the SMA-4750 well suited to professionally installed equipment racks.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCompact 2U chassis\u003c\/strong\u003e — despite its substantial power output, the amplifier occupies only two rack spaces, allowing multiple SMA amplifiers to be combined efficiently in high-channel-count immersive theater systems.\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" class=\"bh-section bh-faq\"\u003e\n\n\u003ch2\u003eFAQ — JBL SMA-4750\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\n\u003csummary\u003eHow much power does the JBL SMA-4750 produce?\u003c\/summary\u003e\n\n\u003cp\u003eThe SMA-4750 is rated to deliver 750 watts into 8 ohms or 1,500 watts into 4 ohms with two channels driven and less than 0.5% THD. An adjacent channel pair can also be bridged to deliver 2,500 watts into an 8-ohm load.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\n\u003csummary\u003eCan the SMA-4750 channels be bridged?\u003c\/summary\u003e\n\n\u003cp\u003eYes. Adjacent amplifier channels can be bridged for substantially greater output. In bridged operation, the SMA-4750 is rated for up to 2,500 watts into 8 ohms, making it suitable for demanding high-power loudspeaker and subwoofer applications.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\n\u003csummary\u003eWhat types of speakers can the SMA-4750 power?\u003c\/summary\u003e\n\n\u003cp\u003eThe SMA-4750 is designed for use with a wide range of JBL Synthesis loudspeakers. Depending on system requirements and configuration, it can power LCR speakers, surrounds, overhead or height speakers, and passive subwoofers.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\n\u003csummary\u003eDoes the SMA-4750 include DSP?\u003c\/summary\u003e\n\n\u003cp\u003eYes. The amplifier incorporates 96kHz, 32-bit floating-point digital signal processing with input and output DSP functionality including EQ, delay, and limiters. This allows an installer to optimize amplifier and loudspeaker performance for the specific system.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\n\u003csummary\u003eDoes the SMA-4750 support Dante?\u003c\/summary\u003e\n\n\u003cp\u003eYes. The SMA-4750 is Dante\/AES67 ready and provides two RJ45 connections for digital audio networking. Dante functionality can be activated for compatible networked-audio installations.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\n\u003csummary\u003eIs the SMA-4750 rack mountable?\u003c\/summary\u003e\n\n\u003cp\u003eYes. The amplifier is designed for standard 19-inch equipment racks and occupies 2U of rack space. Rack-mount brackets and fastening screws are included.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\n\u003c\/section\u003e\n\n\u003csection id=\"why-buy\" class=\"bh-section\"\u003e\n\n\u003ch2\u003eWhy Buy From Us\u003c\/h2\u003e\n\n\u003cul class=\"bh-bullets\"\u003e\n\n\u003cli\u003eAuthorized JBL Synthesis dealer offering 100% genuine products with full manufacturer warranty coverage\u003c\/li\u003e\n\n\u003cli\u003eExpert guidance on amplifier selection, channel configuration, speaker matching, and complete JBL Synthesis theater design\u003c\/li\u003e\n\n\u003cli\u003eProfessional installation, equipment-rack integration, DSP configuration, system calibration, and optimization services available\u003c\/li\u003e\n\n\u003cli\u003eDedicated customer support for setup, networking, control integration, upgrades, and troubleshooting\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003c\/section\u003e\n\n\u003csection id=\"related\" class=\"bh-section\"\u003e\n\n\u003ch2\u003eRelated \u0026amp; System Matches\u003c\/h2\u003e\n\n\u003cul class=\"bh-bullets\"\u003e\n\n\u003cli\u003eJBL Synthesis SMA-8300 8-Channel Bridgeable Class-D Amplifier\u003c\/li\u003e\n\n\u003cli\u003eJBL Synthesis SDP-60 16-Channel Immersive AV Preamp\/Processor\u003c\/li\u003e\n\n\u003cli\u003eJBL Synthesis SDP-70 24-Channel Immersive AV Preamp\/Processor\u003c\/li\u003e\n\n\u003cli\u003eJBL Synthesis SCL architectural and in-room loudspeakers\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003c\/section\u003e\n\n\u003c\/div\u003e\n\n\u003c!-- RIGHT COLUMN --\u003e\n\n\u003caside\u003e\n\n\u003csection id=\"specs\" class=\"bh-section\"\u003e\n\n\u003ch2\u003eJBL SMA-4750 Specs\u003c\/h2\u003e\n\n\u003ctable class=\"bh-specs\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\n\u003ctd\u003e4-Channel Bridgeable Class D Power Amplifier\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eAmplifier Channels\u003c\/th\u003e\n\n\u003ctd\u003e4\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eRated Power — 8Ω\u003c\/th\u003e\n\n\u003ctd\u003e750W per Channel, 2 Channels Driven, \u0026lt;0.5% THD\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eRated Power — 4Ω\u003c\/th\u003e\n\n\u003ctd\u003e1,500W per Channel, 2 Channels Driven, \u0026lt;0.5% THD\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eBridged Power — 8Ω\u003c\/th\u003e\n\n\u003ctd\u003e2,500W, One Bridged Zone Driven\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eAmplifier Topology\u003c\/th\u003e\n\n\u003ctd\u003eClass D\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDigital Signal Processing\u003c\/th\u003e\n\n\u003ctd\u003e96kHz, 32-bit Floating Point\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDSP Functions\u003c\/th\u003e\n\n\u003ctd\u003eInput \u0026amp; Output DSP Including EQ, Delay \u0026amp; Limiters\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFrequency Response\u003c\/th\u003e\n\n\u003ctd\u003e20Hz–20kHz, ±0.5dB at 4Ω\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTotal Harmonic Distortion\u003c\/th\u003e\n\n\u003ctd\u003e0.35% at Full Rated Power, 20Hz–20kHz\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSignal-to-Noise Ratio — A-Weighted\u003c\/th\u003e\n\n\u003ctd\u003e\u0026gt;105dB Referenced to Rated Power\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSignal-to-Noise Ratio — 20Hz–20kHz\u003c\/th\u003e\n\n\u003ctd\u003e\u0026gt;99dB Referenced to Rated Power\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDamping Factor\u003c\/th\u003e\n\n\u003ctd\u003e\u0026gt;1000, 20Hz–100Hz\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eAnalog Inputs\u003c\/th\u003e\n\n\u003ctd\u003e4 × Balanced XLR\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDigital Audio Networking\u003c\/th\u003e\n\n\u003ctd\u003eDante \/ AES67 Ready via 2 × RJ45\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eNetwork \/ Monitoring \/ Control\u003c\/th\u003e\n\n\u003ctd\u003e1 × RJ45\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSpeaker Outputs\u003c\/th\u003e\n\n\u003ctd\u003e4 × Binding Posts; Accepts Up to 10AWG Wire, Spade \u0026amp; Banana Terminations\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e12V Trigger\u003c\/th\u003e\n\n\u003ctd\u003e1 × 3.5mm Input; 1 × 3.5mm Output\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eInput Impedance\u003c\/th\u003e\n\n\u003ctd\u003e70kΩ Balanced \/ 35kΩ Unbalanced\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMaximum Input Level\u003c\/th\u003e\n\n\u003ctd\u003e+21dBu in Low Amplifier Gain Mode\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eStereo \/ Dual Load Impedance\u003c\/th\u003e\n\n\u003ctd\u003e2Ω–16Ω\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eBridged Mono Load Impedance\u003c\/th\u003e\n\n\u003ctd\u003e4Ω–16Ω\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMaximum Fan Noise\u003c\/th\u003e\n\n\u003ctd\u003e51dBA at 1 Meter\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePower Supply\u003c\/th\u003e\n\n\u003ctd\u003e100–220V ±10%, 50\/60Hz\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eRack Height\u003c\/th\u003e\n\n\u003ctd\u003e2U\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions — Including Rack Ears \/ Connectors\u003c\/th\u003e\n\n\u003ctd\u003e19.0\" W × 3.5\" H × 17.0\" D\u003cbr\u003e482.6 × 88.9 × 432.6mm\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions — Chassis\u003c\/th\u003e\n\n\u003ctd\u003e17.0\" W × 3.5\" H × 15.7\" D\u003cbr\u003e431.8 × 88.9 × 400mm\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eNet Weight\u003c\/th\u003e\n\n\u003ctd\u003e21.8 lb \/ 9.9 kg\u003c\/td\u003e\n\n\u003c\/tr\u003e\n\n\u003c\/tbody\u003e\n\n\u003c\/table\u003e\n\n\u003cp class=\"bh-note\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003c\/section\u003e\n\n\u003csection id=\"whats-in-the-box\" class=\"bh-section\"\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\n\u003cul class=\"bh-bullets\"\u003e\n\n\u003cli\u003eJBL Synthesis SMA-4750 4-Channel Bridgeable Class-D Amplifier\u003c\/li\u003e\n\n\u003cli\u003eRack-mount brackets and fastening screws\u003c\/li\u003e\n\n\u003cli\u003eRegion-appropriate AC power cord(s)\u003c\/li\u003e\n\n\u003cli\u003eQuick Start Guide\u003c\/li\u003e\n\n\u003cli\u003eSafety documentation\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003c\/section\u003e\n\n\u003c!-- No purchase\/CTA section --\u003e\u003c\/aside\u003e\n\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"JBL","offers":[{"title":"Default Title","offer_id":55107407348078,"sku":"JBLSMA4750","price":4999.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/files\/jbl-sma-4750-4-channel-bridgeable-class-d-amplifier.webp?v=1790260158","url":"https:\/\/audiolab.com\/products\/jbl-sma-4750-4-channel-bridgeable-class-d-amplifier","provider":"Audiolab","version":"1.0","type":"link"}