Zapco · Amplifier
ST-4B
4-Channel Class AB Amplifier delivering 65W RMS of daily-driver Zapco power.
DAILY
- Max Output
- 125 W
- Impedance
- 4Ω / 2Ω stable
$159.99
- Authorized dealer
- $15 flat-rate shipping
- Manufacturer warranty
Ships in 2–3 business days · 3–5 business days in transit · Estimated delivery 5–8 business days
SKU: ZAP-AMP-ST4B-4CHAB
Overview
Built for the install, not the spec sheet
Committed to Excellence. The ST-B series is the accessible entry point into authentic Zapco amplification. It anchors the foundation of the Zapco lineup, delivering the brand's clean, honest power to first-time and budget-minded builds.
Configured as Class AB 4-Channel Entry, the ST-4B is rated at 4x65W @4Ω, 4x125W @2Ω. It is 4Ω / 2Ω stable.
Ideal as an accessible first amplifier, it pairs naturally with ESB 1000, 2000 and 3000 Series speakers.
Specifications
Measured, not marketed
Power
| Configuration | Class AB 4-Channel Entry |
|---|---|
| RMS | 4x65W @4Ω, 4x125W @2Ω |
Electrical
| Class | Class AB |
|---|---|
| Impedance | 4Ω / 2Ω stable |
| Frequency Response | — |
Physical
| Weight | 15.1kg |
|---|---|
| EAN | 8033373003516 |
Documents
Datasheets, manuals & templates
Designed For
Which build is this for?
Complete the System
