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With our second-generation NexD2™ technology
51 dB SPL Effective Piston Area (Sd) 98
The sharp look matching the Black and Copper theme of the AP amplifiers is only the beginning
linear excursion Xmax +/- 6
Zapco ST-4B 4-Ch. Class AB Amplifier 20 Channel DSP With our second-generation NexD2™ technologyThe ST B Series. Great sound for every day use. Zapco has a reputation for sound reproduction and quality that is unsurpassed. It is our dedication to sonic purity and our passion for performance that built Zapco's reputation. With all the new amps coming into the market, not one has been any threat to Zapco's standing as the premium amp and processor line. Just check the audio competition scene and the audio forums. The pros know what to use to win.