Zapco ST-64D SQ MINI 4 Channel Class D Amplifier

If you are upgrading the audio in your VW Transporter and want a compact amp that is easy to package, the Zapco ST-64D SQ MINI is a strong option. Its small footprint makes it ideal for discreet installs in T5, T6 and T6.1 vans, especially where you want proper amplification without giving up valuable space. Zapco lists it as a 4-channel full-range Class D amplifier with RCA and speaker-level inputs, variable gain control, variable electronic crossover and auto turn-on via speaker-level inputs.

For Transporter builds, that means it works well for front speaker upgrades, front and rear speaker systems, or compact bridged setups where install space is tight. The bridgeable design gives you more flexibility when planning a system, and the micro chassis helps keep the install neat and easy to hide away. Optional HD Bluetooth support is also listed by both CEN and Zapco.

Power output is listed at 4 x 50 watts RMS at 4 ohms, 4 x 75 watts RMS at 2 ohms, and 2 x 150 watts RMS bridged at 4 ohms. Frequency response is given as 15Hz to 30kHz ±1dB, with THD under 0.1% at rated power, signal-to-noise ratio above 90dB, and overall dimensions of 86 x 42 x 151mm.

Key features

• 4-channel full-range Class D amplifier.
• RCA and speaker-level inputs.
• Bridgeable output layout.
• Variable input gain control.
• Variable electronic crossover.
• Auto-on with speaker-level inputs.
• Micro chassis for discreet installs.
• Variable bass boost control.
• Optional HD Bluetooth.

Technical specifications

Part number: ST-64D SQ MINI
Power at 4Ω: 4 x 50 watts
Power at 2Ω: 4 x 75 watts
Bridged power at 4Ω: 2 x 150W RMS
THD at rated power: < 0.1%
Signal-to-noise ratio: > 90dB
Frequency response: 15Hz to 30kHz ±1dB
Input sensitivity: 0.25V to 5V
Net dimensions: 86mm x 42mm x 133mm
Overall dimensions: 86mm x 42mm x 151mm

What’s included

Zapco ST-64D SQ MINI amplifier
1 year warranty