SoundQubed Q4-150ABv2 16.0v Q Series 4 Channel Amplifier

SoundQubed Q4-150ABv2 — 4-Channel Amplifier | Class A/B | 150W x 4 @ 4Ω

The SoundQubed Q4-150ABv2 is the most versatile amplifier in the Q-Series lineup — a full-featured, Class A/B 4-channel amplifier capable of powering your entire car audio system from a single unit. With 150W x 4 at 4Ω, 220W x 4 at 2Ω, and 440W x 2 bridged at 4Ω, the Q4-150ABv2 has the flexibility to drive mids, highs, and a subwoofer simultaneously — or bridge channels for more power to select speakers. Whether you’re building a full system from scratch or upgrading a factory setup, this is the amp that does it all.

The Q4-150ABv2 features variable high-pass (20 Hz–5 kHz) and low-pass (50 Hz–5 kHz) filters that can be configured in a bandpass arrangement for precise frequency control across all four channels. The bass boost (0–18 dB @ 45 Hz) gives you serious low-end punch when driving a subwoofer on the bridged channels. The included remote gain control knob with clipping indicator lets you monitor your levels from the driver’s seat and keep your system clean. With a signal-to-noise ratio of 105 dB and a damping factor greater than 200, the Q4-150ABv2 delivers the kind of sound quality you expect from a Class A/B design.

Stable at 2Ω in stereo and 4Ω in mono/bridged mode, the Q4-150ABv2 is protected by four-way protection circuits and MOSFET switching devices — built to last for years of daily use. Operating across a 9V–16V working voltage range with a 120A external fuse rating, it’s compatible with stock and upgraded electrical systems alike.

Why Choose the SoundQubed Q4-150ABv2?

• 150W x 4 @ 4Ω / 220W x 4 @ 2Ω / 440W x 2 Bridged @ 4Ω — Flexible power configurations for full-system builds, component setups, and subwoofer applications.
• Class A/B Sound Quality — Superb audio fidelity across all four channels — clean, accurate, and musical at any volume level.
• Variable HPF (20 Hz–5 kHz) + LPF (50 Hz–5 kHz) — Full crossover flexibility including bandpass configuration for precise frequency control.
• Bass Boost 0–18 dB @ 45 Hz — Wide boost range for dialing in serious low-end punch on bridged subwoofer channels.
• Remote Gain Knob with Clipping Indicator — Monitor your levels from the driver’s seat and keep your system clean and distortion-free.
• 105 dB Signal-to-Noise Ratio — Exceptionally clean signal for a 4-channel amplifier — quiet background, detailed sound.
• 2Ω Stereo / 4Ω Bridged Stable — Flexible impedance compatibility for a wide range of speaker and subwoofer configurations.
• Four-Way Protection + MOSFET Switching — Built-in protection circuits keep your amplifier running reliably for years of daily use.

System Configuration Recommendations

Full System Build: Use channels 1/2 for front component speakers (high-pass filtered at 80–100 Hz), channels 3/4 bridged for a subwoofer (low-pass filtered at 80 Hz). This gives you a complete 3-way system from a single amplifier — front stage + sub — with the bass boost dialed in on the bridged channels for maximum low-end impact.

4-Speaker Setup: Run all four channels at 2Ω for 220W per channel to a full set of component or coaxial speakers. Use the HPF to protect your speakers from low-frequency content and let your head unit or DSP handle the signal processing.

Electrical Requirements: The Q4-150ABv2 operates from 9V–16V and is compatible with most stock electrical systems. A 120A external fuse is required. Proper 4-gauge power and ground wiring is recommended for clean, reliable performance at full output.

Full Specifications

Frequently Asked Questions

Q: Can the Q4-150ABv2 power my whole car audio system?
A: Yes — that’s exactly what it’s designed for. Use channels 1/2 for front speakers (high-pass filtered) and bridge channels 3/4 for a subwoofer (low-pass filtered). One amp, complete system.

Q: What’s the minimum impedance for bridged mode?
A: The Q4-150ABv2 is stable at 4Ω in bridged mode and 2Ω in stereo mode. Do not bridge into a load below 4Ω — this will damage the amplifier.

Q: Does the Q4-150ABv2 include a remote bass knob?
A: Yes — a remote gain control knob with a clipping indicator is included. The clipping indicator lights up when the amp is being pushed into distortion, helping you set your gain correctly and protect your speakers.

Q: What wiring do I need for the Q4-150ABv2?
A: A 120A external fuse is required. Proper 4-gauge power and ground wiring is recommended for clean, reliable performance at full output. The amp operates from 9V–16V and is compatible with most stock electrical systems.