Blog
2026-09-18
18
2026-09-18
BOX02: 4x50W Class D Car Audio Digital Power Amplifier for Plug-and-Play Upgrades
The ZESTECH BOX02 is a 4x50W Class D car audio digital power amplifier: DC 9-16V input with a 24V internal bus, 90%+ efficiency, 20Hz-20kHz bandwidth with SNR >=95dB and THD <=0.01% @ 1W, +-7dB three-band analog tuning, over-voltage / thermal / shor
2026-09-15
15
2026-09-15
4CH × 75W: What a Real Car-Grade DSP Amplifier Adds to Your Sound
The ZESTECH ZT-BOX03 packs a 4-channel 45W/75W amplifier, 24-bit DSP with 10-band EQ, SPDIF optical and Bluetooth 5.2 inputs, and six-layer protection into one compact plug-and-play aluminum box — no wire cutting required.
2026-09-10
10
2026-09-10
ZESTECH 4CH × 75W DSP Amplifier
BOX03 — User Manual & Specification1. Product OverviewThe BOX03 DSP amplifier is built around an automotive-grade digital amplifier chip, delivering a maximum output of 4CH × 75W into 4Ω speakers. ...
1970-01-01
01
1970-01-01
Small Box, Serious Sound: Inside the ZESTECH BOX03 DSP Amplifier
The ZESTECH ZT-BOX03 is a compact 4-channel DSP digital car amplifier: 75W max / 50W RMS per channel, 24-bit DSP with 10-band parametric EQ and time alignment, Line IN, SPDIF optical 96-192kHz and Bluetooth 5.2 inputs, 90%+ efficiency, six-layer protectio
Tel： +86 755 2369 9550
Email： info@szzest.com
Add：
Building A, Huada Industrial Park, Fuqiao Third Industrial Zone,
Fuhai Street, Bao 'an District, Shenzhen, Guangdong
Design:jiasuweb