Item #JBLSMA4750AM

JBL Synthesis SMA-4750

4-Channel Power Amplifier
Item #JBLSMA4750AM

JBL Synthesis SMA-4750

4-Channel Power Amplifier
$4,999.00
In Stock: Free 2-Day Shipping

Overview

The SMA-4750 is a versatile 4-channel Class D power amplifier designed to deliver maximum power while taking up minimal rack space. Each channel is rated to deliver 750W into 8 ohms and adjacent channel pairs can be bridged to deliver 2,500W into 8 ohms. This flexible channel configuration makes this an ideal amplifier to power LCR, surround, height channel loudspeakers as well as subwoofers in JBL Synthesis immersive audio systems. Powerful built-in DSP allows for custom loudspeaker tuning and full external control allows for complete and easy system integration.

Watch our Comparison

Audio Advice is the exclusive authorized online seller, and the largest seller of JBL Synthesis systems nationwide. Backed by factory-trained system designers and certified calibration specialists, our team delivers complete custom design, engineering, and support for high-performance home theaters nationwide. Explore and audition reference-level JBL Synthesis surround sound systems in person at our world-class interactive showrooms, or consult with our experts online for turnkey system design and nationwide delivery.


The SMA-4750 and SMA-8300 are state-of-the-art Class D multichannel DSP amplifiers that cater to both high-power and high-channel count systems. With advanced features like bridgeable channels, full input and output Hi-Resolution DSP suite, and DANTE / AES67 digital audio networking, these amplifiers are ideal for powering large LCR, surround, and height channel loudspeakers, as well as subwoofers in JBL Synthesis immersive audio systems.

Both models feature a compact, stackable design with quiet side-to-side ventilation, making them perfect for custom installations. They are equipped with a comprehensive DSP suite including EQ, Delay, and Limiters, providing ultimate control and customization for audiophiles and professional installers alike.

JBL Synthesis SMA-4750 4-Channel Power Amplifier

Details & Specs

Model SMA-4750
Analog audio input 4x XLR (Balanced)
Digital audio input (Dante/AES67) 2x RJ45
Speaker output Binding Posts, accommodates 10AWG wire, spade, and banana termination
12VDC trigger control 1x 3.5mm (in), 1x 3.5mm (out)
Network/Monitoring/Control 1x RJ45
Power Standard IEC
Power (2 channels driven, <0.5% THD), Rated Power (8Ω) 750W
Power (2 channels driven, <0.5% THD), Rated Power (4Ω) 1,500W
Power (2 channels driven, <0.5% THD), Rated Power (8Ω Bridged, one zone driven) 2,500W
Digital signal processing 96kHz, 32-bit floating point
Frequency response (4Ω, 20Hz – 20kHz) ±0.5dB
Total harmonic distortion (at full rated power, from 20Hz – 20kHz) 0.35%
Analog input signal to noise ratio (ref. Rated power, ‘a’-wtd.) >105dB
Analog input signal to noise ratio (ref. Rated power, 20Hz – 20kHz) >99dB
Damping factor (20Hz to 100Hz) >1000
Input impedance (nominally balanced, nominally unbalanced) 70 kΩ balanced, 35 kΩ unblanced
Maximum input level (low amp gain mode) +21dBU
Load impedance stereo/dual mode 2Ω –16Ω load
Impedance bridge mono 4Ω – 16Ω
Maximum fan noise (REF. dB SPL @ 1M) 51dBA
Power supply 100 – 220V ±10%, 50/60Hz
Dimensions incl. rack ears, connectors, controls (H x W x D) 3.5 x 19.0 x 17.0 in (88.9 x 482.6 x 432.6 mm)
Dimensions excl. rack ears, connectors, controls (H x W x D) 3.5 x 17.0 x 15.7 in (88.9 x 431.8 x 400.0 mm)
Net Weight 21.8 lb (9.9 kg)

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