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New JBL Synthesis SMA-4750 Bridgeable Class D Amplifier

4 x 750W Bridgeable Power Amplifier with DSP and Dante
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Item ID: SMA4750AM
JBL Synthesis SMA-4750 Bridgeable Class D Amplifier
Price:$4,999 and 00 cents
$834.00 suggested monthly payment§ with 6 month special financing‡

We Can Get It!

While this isn't an item we normally stock, we can still get it to you as fast as possible due to our great relationship with JBL Synthesis. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated May 2026.

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JBL Synthesis SMA-4750 Bridgeable Class D Amplifier
We Can Get It!
Price:$4,999 and 00 cents
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High-powered Amplification for Your JBL Synthesis System

A world-class 4-channel Class D power amplifier for your JBL Synthesis installation, the SMA-4750 is designed for high-power, high-channel-count systems. The SMA-4750 delivers 750 watts per channel into 8 ohms, and you can bridge adjacent channels for up to 2,500 watts into 8 ohms. You’ll appreciate this amplifier’s flexible channel configuration, which tackles LCR, surround, height, and subwoofer duties with equal aplomb. Moreover, full input and output DSP equips you with high-resolution EQ, delay, and limiting. Delivering maximum power while taking up minimal rack space, the SMA-4750 offers full external control for seamless system integration, features a CI‑focused user interface, and includes Dante digital audio networking for seamless expansion and routing. Ultimately, the JBL Synthesis SMA-4750 provides you with a rock-solid anchor for ambitious custom installations.

Note: JBL Synthesis products can only be purchased through a certified Sweetwater Sales Engineer. Please call us if you have questions.

JBL Synthesis: immersive home theater audio, perfectly tailored to your room

JBL Synthesis melds expert engineering, advanced calibration, and unmatched sound, providing you with a turnkey system geared toward cinematic-caliber audio. Every JBL Synthesis system is fully customized to your room’s size, acoustics, and construction, ensuring perfect component synergy and guaranteed sonic immersion for every seat. Each system is specified, installed, and meticulously calibrated to your space, creating enveloping sound powered by JBL’s compression-driver technology in lieu of conventional tweeters. This unique hardware yields breathtaking dynamics, unrivaled clarity, and astonishing realism. Your Sweetwater Sales Engineer can design a custom-tailored system for you, from speakers and amplifiers to room layout to wiring, rack systems, and supporting electronics. Such a level of customization removes all guesswork from the setup process, keeping the task accessible to DIY installers. Moreover, JBL Synthesis systems integrate flawlessly with modern home construction materials and layouts, complete with an eye-grabbing stamped faceplate. Ultimately, JBL Synthesis offers more than a sound system; it delivers a bold statement of uncompromising performance, craftsmanship, and pride of ownership.

JBL Synthesis SMA-4750 Features:

  • A world-class 4-ch. Class D power amp for JBL Synthesis installations
  • Delivers 750W/ch. into 8 ohms; bridgeable adjacent channels for up to 2,500W into 8 ohms
  • Flexible channel configuration tackles LCR, surround, height, and subwoofer duties with equal aplomb
  • Full I/O DSP features high-resolution EQ, delay, and limiting
  • Full external control for straightforward system integration
  • CI‑focused user interface is optimized for residential applications
  • Dante digital audio networking provides seamless expansion and routing

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

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  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
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Tech Specs

  • Amp Type: Rackmount Amplifier
  • Number of Channels: 4-channel
  • Power Class: Class D
  • Watts per Channel @ 8 ohms: 750W
  • Watts per Channel @ 4 ohms: 1500W
  • Watts Bridged: 2500W @ 8 Ohms
  • Analog Inputs: 4 x XLR
  • Speaker Outputs: 2 x Dual Binding Posts
  • Data I/O: 2 x RJ-45 (Dante/AES67), 1 x RJ-45 (control)
  • 12-volt Trigger: 2 x 1/8" (in, out)
  • DSP: 32-bit/96kHz
  • Frequency Response: 20Hz to 20kHz (±0.5dB, @ 4 ohmns)
  • THD: 0.02%
  • Cooling System: Fan-cooled Chassis (51dBA maximum noise)
  • Features: Includes: 2 x Rackmount Bracks (w/screws)
  • Rack Spaces: 2U
  • Power Source: Standard IEC AC Input (cable included)
  • Height: 3.5"
  • Width: 19"
  • Depth: 17.03"
  • Weight: 21.82 lbs
  • Manufacturer Part Number: JBLSMA4750AM

What Makes Our Sales Engineers Great?

Sweetwater Sales Engineers are a world-class team of experts dedicated to you. Hand selected from across the globe, each brings a wealth of experience and expertise in the world of music gear to provide you with unparalleled service completely free of charge. Friendly relationships, real trust, and the right gear are only a call or a click away!

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