Studiomaster HX4-600

HX - digital power amplifiers


The HX series are our ultra lightweight, compact yet high performance digital power amplifier models.

All models feature comprehensive protection and status indicators, and are in 2 and 4 channel variants offering from 2 x 225 watts at 4ohms up to 4 x 765 watts.

The HX series are all 1U size, with power factor correction (PFC), universal power supplies with will operate between 90-250VAC, and will perform at loads down to 2ohms.

For demanding installation, conference, entertainment and smaller touring and rental applications, the new HX series will supply the performance, power and reliability you need in a compact, affordable package.


Energy saving design with high efficiency
Power factor correction (PFC)
Universal 90-250V power supply
2 and 4 channel models
Reliable efficient operation down to 2ohm loads
Variable speed fan cooling
Status and protection indicators
Stereo/parallel/bridge modes
Multiple gain modes
Output limiter
Balanced XLR inputs
Professional speaker connectors
Thermal, overload, DC protection
Thermal, fault and limiter indicators

Slope (1kHz, Bypass LPF): 50V/us
Input Sensitivity 1kHz: 1Vrms
THD+N (10% rated output power): 0.02%
IMD-SMPTE (10% rated output power): 0.05%
DIM30 (10% rated output power): 0.05%
Crosstalk rejection (less than rated power, 20Hz – 1kHz): >80Db
Frequency Response (10% rated output power, 8ohm, 20Hz – 20kHz): 0.2dB
Input Impedance: 20k ohm (bal), 10k ohm (unbal)
Damping Factor (8ohm, 20Hz – 100Hz): 300
S/N ratio (A weighted, 20Hz-20kHz): 105dB
Power supply: 90-260VAC, 50/60Hz
Protection: overoad/thermal/DC output protection
Dimensions (WxHxD) 483mm x 44mm x 323mm
Net Weight: 2channel 5.0kg, 4channel 5.7kg

HX4-600
8ohms Stereo: 4x150watts
4ohms Stereo: 4x255watts
2ohms Stereo: 4x435watts
16ohm Bridged: 2x300watts
8ohm Bridged: 2x510watts
4ohm Bridged: 2x870watts

FBT HX-4 600 (Studio Master HX4 600)