SMA-4750
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.
High-powered amplification with bridgeable outputs in a compact rack stackable design
Designed to support high-power and high-channel count systems as part of a complete JBL Synthesis system solution
Flexible design with bridgeable channels - suitable for all JBL Synthesis loudspeakers
Full input and output Hi-Resolution DSP suite including EQ, Delay, and Limiters
Optimized for residential applications with a CI focused UI and feature set
DANTE / AES 67 Ready*digital audio networking
Specifications
General Specifications
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)
Documents & Downloads
The latest owner's manuals, quick start guides, and documents.
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