• High efficiency DPT Technology
  • Premium heavy duty Toroidal Transformer
  • Highly sensitive CMRR balanced input stage
  • Ultra low-load output capacity
  • Channel independent power, Signal and clip LEDs


Pulz AD21300 is a two channel power amplifier designed and built for applications where sonic transparency and robust high power output capability are the prime criteria.

Built around an oversized classic toroidal power supply and ultra – linear Class AB output stage, Pulz AD21300 packs 3500 Watts of continuously deliverable clean audio in a 2U chassis.

This is made possible by the innovative dynamic power tracking controller (DPT) which fluidly adjusts the power supply rails to track the signal. As a result unwanted power dissipation in the output stages is minimized by almost 80%.

The Pulz AD21300 remains relatively cool even when driving the most demanding low impedance subwoofer loads. This approach is superior to the standard SMPS based power supplies which are prone to failures and compromise the sonic purity due to interferences.

All the components used in the Pulz AD21300 are of the highest standard and from the most reputed manufacturers.

Channel independent soft clipping, level indicators, sensitivity selection, protection and high CMRR balanced input stages are the additional useful features which makes Pulz AD21300 out perform the standard amplifiers currently available.

No. of Channels2
Output Power (per channel)2 X 400 Watts @ 16Ω

2 X 800 Watts @ 8Ω

2 X 1300 Watts @ 4Ω

1 X 2500 Watts @ 8Ω bridge mode

1 X 3500 Watts @ 4Ω bridge mode

Frequency Response20Hz – 20kHz, +0/-0.5dB
Total Harmonic Distortion + Noise<0.1%
Signal to Noise Ratio110dB
Damping factor>300
Slew Rate>10V/us
Input Sensitivity0.7V, 1.4V
Input Impedance20kΩ, balanced
Voltage Gain38dB at 0.7V Sensitivity
CoolingAir flow from front to rear
ProtectionFuseless short circuit protection, ultrasonic and RF protection, thermal protection
Load ProtectionTurn on delay, DC fault protection, Ultrasonic limiting
Power requirement220V AC 50Hz, ±10%




Balanced inputs XLR-F

NL4 Speakon

Front panelPower switch, Level control, Power indicator, Signal indicator, Clip, Protection
Rear panelStereo/Bridge switches, Sensitivity selection switch, VCL selection switch
Product dimensions88 mm X 490 X 490 mm (3.4″ X 19.3″ X 19.3″)
Net Weight32 kg (70 lb)
Packed Weight35 kg (77 lb)