Karaoke Amplifiers Better Music Builder (M) A-4 4-Channel Power Amplifier 1600 Watts

Better Music Builder (M) A-4 4-Channel Power Amplifier 1600 Watts

Better Music Builder (M) A-4 4-Channel Power Amplifier 1600 Watts
SKU a4
Weight 42.00 lbs


The wait is over! The much anticipated stereo power amplifier from Better Music Builder (M) has arrived! And it comes in two models: A-3 and A-4. A-3 is a 3-Channel and A-4 is a 4-Channel power amplifier. If you’re really looking for something to bring life to your party, bring this along and you’ll have a blast!

This new series is designed by the best minds here in Better Music Builder to make this the most efficient, most durable, and of course the best designed amplifier ever. When you’re using the best components and the most advanced technology, cutting the total weight wasn’t that difficult. And to officially make this the most portable amplifier, we’ve included front handles so you can lug the machine with ease.

Considering how much power the A Series can bring, it needs a sophisticated cooling system. That’s where the patented Turbo-Cooling System from Better Music Builder comes in. Using the new technology, the system aligns the amplifier’s massive heat sinks to provide maximum cooling. Also, the fan speed is programmed to vary automatically based on temperature. What all this means is that the system extends the life of power transistors by maintaining safe internal temperatures.


  • 4-Channel power amplifier
  • Sleek aluminum chassis
  • Signal level indicator for each channel
  • Link and Alone work mode
  • Power overload protection
  • Sophisticated Turbo-Cooling System helps extend life
  • Variable fan speed is automatically adjusted by temperature
  • Anti-dust ventilation grill
  • Front handles for portability
  • Gain has two settings: 32dB and 0.775V
  • Inputs: 4 XLR audio inputs
  • Outputs: 4 dual-banana audio outputs


  • Rated Power: 400W x 4 (8ohm/60s) / 500W x 4 (8ohm/40ms) / 800W x 4 (4ohm/40ms)
  • Maximum Output Voltage: 80 V (Vp/40ms)
  • Input Sensitivity: 1.41 V (32dB/X40)
  • Max Gain (0.775v): 37.3 dB
  • THD: <0.025% (1kHz, normal operating conditions)
  • Intermodulation Distortion: <0.075% (60Hz/7kHz 4:1, normal operating conditions)
  • Frequency Response: <+ / - 0.5dB (20Hz-20kHz, normal operating conditions)
  • Power Bandwidth: 10Hz~22kHz (-3dB, normal operating conditions)
  • Phase Response: <+ / -15 Degrees (20Hz-20kHz, normal operating conditions)
  • S/n Ratio: > 110dB (1kHz, X40 (32dB), A-weighted)
  • Damping: > 300 (63Hz)
  • Conversion Rate: > 20V/us (10kHz Square Wave, X40 (32dB) gain)
  • Input Impedance: > 20k ohm (1kHz, balanced input)
  • Minimum Load Impedance: > 3.2 ohm (single channel)
  • Separation: > 80dB (1kHz)
  • Common Mode Rejection: > 80dB (1kHz)
  • Dimensions (WxHxD): 19x3.5x17.9 inches / 48.2×8.8×45.5 cm
  • Packing Dimensions (WxHxD): 22.8x4.5x21.3 inches / 58x11.5x54 cm
  • Net Weight: 35.3 Lbs / 16 Kg
  • Shipping Weight: 41.9 Lbs / 19 Kg
  • UPC Code: 743062980513

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