JBL SMA-4750

JBL Synthesis SMA-4750 – Powerful and flexible 4-channel Class-D amplifier

The JBL Synthesis SMA-4750 is a compact yet extremely powerful 4-channel Class-D amplifier designed to deliver maximum performance and flexibility in modern high-end and cinema-style audio systems. With 750 watts per channel into 8 ohms – and the ability to bridge channels to a full 2,500 watts – the SMA-4750 is designed to drive LCR, surround, ceiling and subwoofer speakers with impressive control and precision.

The built-in DSP and full network control allow the amplifier to be perfectly adapted and integrated into any JBL Synthesis system, regardless of the complexity of the setup.

Highlights

• 4-channel Class-D amplifier with 750 W per channel into 8 ohms
• Bridging capability: up to 2,500 W into 8 ohms per channel pair
• Built-in 96 kHz / 32-bit DSP for precise speaker matching
• Dante/AES67 network input for digital signal distribution
• Analog XLR input (balanced)
• Extreme damping factor (>1000) for maximum bass control
• Signal-to-noise ratio above 105 dB
• Compact 2U rack design with low fan noise
• Full network and trigger control for system integration

Uncompromising power and control

The SMA-4750 is designed to deliver high power with low distortion. The efficient Class-D construction delivers 750 watts per channel into 8 ohms and 1,500 watts into 4 ohms, while two channels in bridged mode can deliver a whopping 2,500 watts. This provides flexibility that makes the amplifier ideal for both high-performance multi-channel cinema systems and dedicated subwoofer configurations.

With a damping factor of over 1000 and a total harmonic distortion of just 0.35%, the SMA-4750 delivers a sound that combines power, control and precision – even at full load.

Advanced digital signal processing

The built-in DSP operates at 96 kHz resolution and 32-bit floating precision, enabling precise speaker matching and optimal frequency control. The amplifier can be configured via network and seamlessly integrated into professional JBL Synthesis systems where precision and stability are essential.

Flexible connectivity and integration

The SMA-4750 offers both analog XLR inputs and digital Dante/AES67 inputs, making it compatible with both traditional and networked audio systems. The amplifier also features 12V trigger control, RJ45 network port for monitoring and control, and high-quality speaker terminals that support both banana and spade connectors.

Compact design for professional installation

Despite its enormous performance, the SMA-4750 is built in a compact 2U rack cabinet, making it easy to install even in space-constrained environments. The quiet cooling ensures trouble-free operation in both home theaters and professional studios.

Designed for JBL Synthesis systems

As part of the JBL Synthesis ecosystem, the SMA-4750 is optimized to work with the brand's speakers and processors, combining powerful output, flexible configuration and advanced DSP control in an amplifier designed for uncompromising sound reproduction.