• Modular construction
  • Quad channel, parallel mono & bridged mono modes
  • Forced front to back air-cooling
  • LED level meters
  • Turn on delay
  • Strategically located transformer to reduce front panel torsion


The Pulz PZ4820 four channel power amplifier is specially designed as a cost effective solution for today’s competitive environments. The robust bipolar output circuit combines clean power with superb dynamics and can accurately drive a variety of speaker systems, in both active and passive modes. This amplifier is an ideal solution for today’s immersive audio installations which require many channels of high power amplification.

The power supply consists of heavy-duty high current toroidal transformer and large capacitor banks that deliver continuous power without hiccups when driving low impedance speakers. The high-power bipolar devices and the forced air cooling ensure stable operation under harsh conditions. The topology consists largely of discrete components for long term reliability. The modular construction facilitates field serviceability.

The front panel features signal presence, clipping, fault and output level indicators. The amplifier is fully protected against internal and external malfunctions. The Pulz PZ4820 is housed in a 2U rack mountable chassis. The front to back forced air cooling facilitates direct stacking, saving valuable rack space.

The exceptional price to performance ratio combined with sturdy construction makes the Pulz PZ4820 an investment that guarantees many years of trouble free service.

No. of Channels4
Output Power (per channel)4 X 480 Watts @ 8Ω

4 X 820 Watts @ 4Ω

2 X 1560 Watts @ 8Ω in bridge mode

2 X 2100 Watts @ 4Ω in bridge mode

Frequency Response30Hz –20kHz, ±0.2dB
Total Harmonic Distortion + Noise<0.05%
Intermodulation Distortion<0.02%
Signal to Noise Ratio-95dB
Damping factor>400 @ 8Ω
Slew Rate50V/us
Input Sensitivity1.4V RMS (+5dBu)
Input Impedance20kΩ, balanced
Voltage Gain32dB
CoolingAir flow from front to rear
ProtectionClip limiters, High temperature, Short circuit
Load ProtectionTurn on delay, DC fault protection, Ultrasonic limiting
Subsonic filter30Hz, second order high pass
Power requirement230 –240V AC, 50Hz –60Hz




Balanced inputs XLR-F

NL4 Speakon and binding post

Front panelPower switch, Level control, Power indicator, Signal indicator, Clip, Protection
Rear panelBridge indicators, Stereo/bridge switch
Product dimensions89 mm X 483 mm X 457 mm (3.5” X 19’’ X 18’’)
Net Weight26 kg (57 lb)
Packed Weight28 kg (62 lb)