Jensen POWER400X4 4-Channel Power Series Amplifier
Four-channel Power Series amp rated 400 W max (peak)
$99.99$129.99 (-23%)
Overview
The Jensen POWER400X4 is a 4-channel Power Series amplifier rated at 400 watts maximum (peak). It uses 2×20 A fusing, #8 minimum power wire, and 2-ohm stereo / 4-ohm bridged minimum loads, with front/rear level, bass EQ, and LPF/HPF/full crossover controls. This listing uses the 400 W max (peak) rating only. POWER400X4 is a distinct 4-channel model from POWER400X2.
Product details
4-channel Power Series
The Jensen POWER400X4 is a four-channel Power Series amplifier rated at 400 watts maximum (peak). It is its own model—do not assume shared electrical ratings with POWER400X2.

Install-ready power and controls
It uses 2×20 A fuses and #8 minimum power wire, with speaker layouts for four speakers or bridged pairs. Front and rear input level, bass EQ, and selectable LPF / full / HPF crossovers help match your speakers.

Peak power rating
This listing uses the 400 watts max (peak) figure only. No continuous RMS wattage is claimed for this SKU.
Key features
- 4-channel Power Series amplifier (POWER400X4)
- 400 watts max (peak)
- 2 × 20 A fuses
- Minimum power wire: #8 AWG
- 2 ohm stereo / 4 ohm bridged minimum
- Front and rear input level controls
- Bass EQ control
- Selectable LPF / Full / HPF crossovers (front and rear)
Specifications
| Brand | Jensen |
|---|---|
| Model | POWER400X4 |
| SKU | POWER400X4 |
| UPC | 827204111338 |
| Product type | 4-channel amplifier |
| Channels | 4 channel |
| Max power | 400 watts (peak) |
| Fuse | 2 × 20 A |
| Min power wire | #8 AWG |
| Min load stereo | 2 ohm |
| Min load bridged | 4 ohm |
| Crossover | LPF / Full / HPF (front & rear) |
| Bass EQ | Yes |
| Channels | 4 channel |
Important notes
- 400 W max (peak) only — no RMS wattage is claimed for this SKU
- Wiring kit, RCA cables, and speakers sold separately
- Use proper grounding, fuse placement, and gauge for a safe install
- Professional installation recommended
What's in the box
- Jensen POWER400X4 amplifier
- Accessories as packaged


