ST-4B
4-Channel Class AB Amplifier delivering 65W RMS of daily-driver Zapco power.
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.
- Max Output
- 125 W
- Impedance
- 4Ω / 2Ω stable
Our actual price is below the manufacturer's advertised minimum — final price is shown in cart.
- Authorized dealer
- Free US shipping
- Manufacturer warranty
SKU: ZAP-AMP-ST4B-4CHAB
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.
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 |
Datasheets, manuals & templates
No documents attached yet.
