Stetsom Bravo HQ 400.4 4 Channel Digital Amplifier – 400W RMS 2 Ohms Stable

Stetsom Bravo HQ 400.4 4 Channel Digital Amplifier – 400W RMS 2 Ohms Stable
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The Stetsom Bravo HQ 400.4 is built for car audio lovers who want clean multichannel power, useful tuning control, and a compact amplifier that is easy to fit into real-world builds. Stetsom says the Bravo HQ line was developed for people looking for both performance and sound quality, using a compact, discreet, and quiet amplifier design. That makes the HQ 400.4 a strong option for speaker upgrades, full-range systems, and installs where space matters but you still want dependable four-channel output.

This amp gives you four output channels and is also compatible with bridge mode, which opens up more flexibility depending on how you want to power the system. At 14.4 volts it is rated for 4 x 105 watts RMS at 2 ohm, 4 x 60 watts RMS at 4 ohm, or 2 x 180 watts RMS bridged at 4 ohm. That gives you room to run mids and highs in a full active-style setup, power door speakers with headroom, or bridge channels for stronger output in the right application.

One of the best things about this amp is how flexible it is for tuning. The Bravo HQ 400.4 includes variable high-pass and low-pass crossovers from 50 Hz to 2.3 kHz, plus level controls for more precise adjustment. Stetsom also lists a wide 5 Hz to 30 kHz frequency response, which is why this amplifier can be used in a variety of projects with subwoofers, woofers, drivers, and tweeters. For someone building a clean everyday system or a compact multichannel setup, this is the kind of amp that gives you useful power and useful control without taking up a lot of room.

Whether you are powering door speakers, mids and highs, or putting together a compact full-range setup with bridging flexibility, the Stetsom Bravo HQ 400.4 gives you strong four-channel performance, adjustable crossovers, and a size that makes installation easier in tighter builds.

Key Features

Number of Channels: 4 channels

Total RMS Power: 400 watts RMS

Power at 2 Ohm 14.4V: 4 x 105 watts RMS

Power at 4 Ohm 14.4V: 4 x 60 watts RMS

Power at 2 Ohm 12.6V: 4 x 85 watts RMS

Power at 4 Ohm 12.6V: 4 x 50 watts RMS

Bridged Power at 4 Ohm 14.4V: 2 x 180 watts RMS

Bridged Power at 4 Ohm 12.6V: 2 x 150 watts RMS

Stability: 2 ohms stereo stable

Frequency Response: 5 Hz to 30 kHz

Low Pass Crossover: 50 Hz to 2.3 kHz variable

High Pass Crossover: 50 Hz to 2.3 kHz variable

Signal to Noise Ratio: Greater than 90 dB

Harmonic Distortion: Less than 1%

Input Sensitivity: RCA 200 mV to 8.0V / High input 1.5V

Input Impedance: RCA 15K ohms / High 1K ohms

Operating Voltage: 9V to 15.5V DC

Musical Signal Consumption: 17A

Bass Signal Consumption: 34A

Dimensions: 58.5 x 127 x 167 mm

Weight: 640 g

Whether you are building a cleaner daily-driver speaker setup or need a compact four-channel amplifier with bridge flexibility and crossover control, the Bravo HQ 400.4 gives you the kind of practical output and tuning range that make system matching easier.