PowerBass ACS-4090 4-Channel Amplifier
Key features
- Amplifier channels: 4
- RMS per channel at 4 ohms: 45 W
- RMS per channel at 2 ohms: 90 W
- Frequency response: 10 Hz - 50 kHz
- Input sensitivity: 0.25 V - 6.0 V
- Dimensions (L × W × H): 12.8 × 7.1 × 2.0 in
PowerBass ACS-4090 4-Channel Amplifier is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
Add four-channel power to a space-limited car audio system with the PowerBass ACS-4090 4-channel amplifier. Its Class A/B design delivers 90W RMS per channel at 2 ohms, with high- and low-level inputs for connecting to different audio sources.
Key Features & Benefits
- Four-channel output: Power four speakers from one compact amplifier.
- Flexible speaker loads: The amplifier is 2-ohm stable in four-channel mode and supports 4-ohm loads when bridged.
- High- and low-level inputs: Choose speaker-level or RCA connections for integration with a factory head unit or aftermarket source.
- Adjustable sound controls: Variable high- and low-pass crossovers, gain control, and selectable 12dB bass boost help tailor the signal.
- Delayed turn-on and off: The remote soft-delay circuit is designed to eliminate turn-on pops.
- Protection and cooling: Protection circuits address impedance overload, speaker shorts, overheating, and DC output; the 6 oz/kg high-density heatsink supports cooling.
Technical Specifications
| Specification | Details |
|---|---|
| Model | ACS-4090 |
| Amplifier type | 4-channel, Class A/B, full-range |
| Output power at 14.4V | 4 ohm: 45 watts x 4; 2 ohm: 90 watts x 4; 1 ohm: N/A |
| RMS output | 90W RMS per channel into 2 ohms |
| Peak power | 720 watts |
| Bridged load | 4 ohms |
| Power supply | PWM MOSFET |
| Inputs | High Level (Speaker) / Low Level (RCA) |
| Crossover | Variable High/Low Pass Electronic Crossover |
| Bass boost | Selectable 12dB Bass Boost EQ |
| Gain control | Variable |
| Frequency response | 10 Hz – 50 kHz |
| Signal-to-noise ratio | >100 dB |
| Total harmonic distortion | 0.3% @ Rated Power |
| Dimensions (in Inches) | 12.8" x 7.1" x 2.0" |
| Depth | 12.8" |
| Heatsink | 6 oz/kg high-density design |
| Protection circuit | Impedance overload, speaker short, thermal overheating, and DC output conditions |
Why Choose This Product?
The ACS-4090 combines four-channel amplification with crossover and gain adjustments in a compact chassis. Use its controls to shape the signal for your speakers, whether you’re building a component system or fitting amplification into a vehicle with limited space.
Its stated frequency response runs from 10 Hz to 50 kHz, while the signal-to-noise ratio is greater than 100 dB. These figures help you compare its listed audio performance with the requirements of your system.
Installation & Compatibility Notes
Before installation, confirm the available mounting space against the amplifier’s listed dimensions and depth. Match speaker loads to the specified operating conditions: 2 ohms for four-channel use or 4 ohms when bridged. The amplifier accepts speaker-level or RCA inputs.
Frequently Asked Questions
How much power does the ACS-4090 deliver?
At 14.4V, its listed output is 45 watts x 4 at 4 ohms and 90 watts x 4 at 2 ohms. The product description also lists 720 watts peak power.
What speaker impedance does it support?
It is 2-ohm stable in four-channel use. For bridged operation, the listed load is 4 ohms.
Can it connect to a factory head unit?
It has high-level speaker inputs as well as low-level RCA inputs, allowing either connection type.
What sound adjustments are available?
It includes variable high- and low-pass electronic crossovers, variable gain control, and selectable 12dB bass boost EQ.
How much mounting space should I allow?
The listed dimensions are 12.8" x 7.1" x 2.0", with a listed depth of 12.8".
Explore More
Shop for the PowerBass ACS-4090 at 12 Volt Outlet. Want to learn more about PowerBass? Explore our PowerBass brand profile.
