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The new Class D Studio Series.





Over the last couple of years Zapco has introduced more than our pure high end SQ Competition amps. We have also introduced a line of great sounding amps in an affordable price range called the Studio series. The Studio D amps are full range Class D amps with great sound, a compact chassis, and more crystal clear power than the competition.

Thanks to a brand new technology, we are able use the NXP Class D solution to get amazing power and performance in a incredibly compact chassis with over 90% efficiency. And this diminutive little beast has all the features of the larger amps... and optional HD Bluetooth streaming!


The HD Bluetooth Module (optional) is a Qualcomm CSR8675 premium tier single-chip solution with 80 MHz DSP, delivering high quality 

wireless audio performance over Bluetooth and aptX HD making it an ideal choice for premium audio products.


What makes the MINI amps truly amazing are their extremely small sizes. The ST-64D MINI measures only 15,1 cm (6”) x 8,6 cm (3,4”), and the ST-104D MINI is only 23,6 cm (9,3”) x 9,5 cm (3,7”). 



These little beasts aren’t just small, and they aren’t just powerful.

They had to earn the Zapco name before we put them into production. But that’s still not all there is to these new amps. They have all the advanced features you would expect... and more. Thanks to a brand new technology, we are able use the NXP Class D solution to get amazing power and performance in a incredibly compact chassis with over 90% efficiency. 

The Mini-Amps Series includes two 4-channel amps with 50 Watts RMS/Ch @ 4Ω (ST-64D MINI), and 95 Watts RMS/Ch @ 4Ω (ST-104D MINI) at less than 0.5% distortion, and a 530 Watts Mono amp. The ST-64D and ST-104D have also the HD Bluetooth Module port, so you can fire up the music on your phone, tablet, or other Bluetooth smart device.

Class D Mini Amplifiers

We also have something special for you if you could handle a little larger chassis? Like the standard Studio X compact chassis? How about 1100 watts of full range Class D power... and HD Bluetooth streaming?

The upgraded TI technology means these amps are also 90% efficient, just like the Mini amps. So again... the power to size is huge. These amplifiers are less than 1/2 the size of any similarly powered amplifiers we have ever made.

This year we bring you the Studio-SQ III series with a new high efficiency finned chassis and temperature controlled fans to assure that your amplifier plays all day long with no problems of overheating, even when you get that urge to really boogie. And with the new chassis, we even made a few tweaks to the internal components to take the sound quality up another notch. Your new ST-204D SQ III is the first of the Studio-D Series with all the Series III upgrades. 


High Power Amplifiers 

The Zapco Class D ST-Series Amplifiers

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