SoundQubed Q4-2000 16v Q Series 4 Channel Amplifier

SoundQubed Q4-2000 — 4-Channel Amplifier | Q-Series Flagship | 325W x 4 @ 4Ω

The SoundQubed Q4-2000 is a flagship Q-Series 4-channel amplifier — a high-speed digital amplifier with Class A/B-like processing in a Class D footprint. Delivering 325W x 4 at 4Ω, 500W x 4 at 2Ω, and 780W x 2 bridged at 4Ω, the Q4-2000 is built for enthusiasts who demand precision crossover control, flagship-grade build quality, and serious power for their front stage or full system build. Korean-built, with a standard plexi backing and oversized heatsink, it shares the same cutting-edge platform as its big brother the Q4-3200.

The Q4-2000 features fully bandpassable crossovers with a selectable band-pass (X1–X10) crossover multiplier — eliminating the need for a separate DSP in most builds. The HPF range covers 20 Hz–8 kHz and the LPF covers 50 Hz–8 kHz, giving you precise control over both the top and bottom sides of the slope across all four channels. Input mode is selectable between 2-channel and 4-channel, adapting to your specific signal routing needs. With a signal-to-noise ratio of 90 dB, 89% efficiency at 4 ohm, a damping factor of 100, and Tiffany-style RCA inputs, the Q4-2000 delivers exceptional audio quality with flagship-grade refinement.

Stable at 2Ω in stereo and 4Ω in bridged mode, the Q4-2000 is protected by a full suite of thermal, overload, DC output, short circuit, voltage input, and clipping protection circuits. With a 4GA power input and 120A fuse rating, it’s compatible with most upgraded electrical systems right out of the box. Surface mount component technology and a heavy-duty PCB ensure reliable, durable performance in the most demanding conditions.

Why Choose the SoundQubed Q4-2000?

• 325W x 4 @ 4Ω / 500W x 4 @ 2Ω / 780W x 2 Bridged @ 4Ω — Flagship-level power and flexibility for serious front stage and full system builds.
• High-Speed Digital with Class A/B-Like Processing — The best of both worlds — Class D efficiency with Class A/B sonic character.
• Fully Bandpassable Crossovers with X-Over Multiplier (X1–X10) — Eliminates the need for a separate DSP — precise HPF and LPF slope control across all channels.
• Selectable 2Ch/4Ch Input Mode — Adapts to your signal routing — run from a 2-channel or 4-channel source without additional hardware.
• Damping Factor of 100 — Solid cone control for tight, accurate bass and detailed midrange reproduction.
• 90 dB Signal-to-Noise Ratio — Clean, accurate signal reproduction across all four channels.
• 4GA Power Input + 120A Fuse — Compatible with most upgraded electrical systems — no extreme wiring required.
• Korean-Built Flagship Quality — Surface mount component technology, heavy-duty PCB, Tiffany-style RCA, and Audio Precision quality control verification.

System Configuration Recommendations

High-Output Front Stage: Run all four channels at 2Ω for 500W per channel to a full set of high-power component speakers. Use the selectable bandpass crossover with the frequency multiplier to dial in your exact crossover points without a DSP. At this power level, high-quality component speakers with appropriate RMS ratings are essential.

Front Stage + Subwoofer: Use channels 1/2 for front component speakers (HPF filtered) and bridge channels 3/4 for a subwoofer (LPF filtered) for 780W of subwoofer power. The bandpassable crossover and multiplier give you DSP-level control from a single amplifier. Pair with a dedicated SoundQubed S1-1250 or Q1-4500v2 monoblock for a complete high-output system.

Electrical Requirements: The Q4-2000 requires a 120A fuse and proper 4-gauge power and ground wiring. A high-output alternator and upgraded battery are recommended for sustained high-power use at full output.

Full Specifications

Frequently Asked Questions

Q: Do I need a DSP with the Q4-2000?
A: Not necessarily — the Q4-2000’s fully bandpassable crossovers with X-Over frequency multiplier (X1–X10) give you DSP-level crossover control built into the amplifier. For most builds, this eliminates the need for a separate DSP unit.

Q: What’s the minimum impedance for bridged mode?
A: The Q4-2000 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: What’s the difference between the Q4-2000 and Q4-3200?
A: Both are Korean-built flagship Q-Series 4-channel amplifiers sharing the same platform. The Q4-3200 delivers more power (520W vs. 325W x4 @ 4Ω), requires 0GA wiring and a 300A fuse, and is built for higher-output competition front stage builds. The Q4-2000 is the ideal choice for serious daily driver and sound quality builds where 4GA wiring and a 120A fuse are sufficient.

Q: What wiring do I need for the Q4-2000?
A: 4GA power and ground wiring is required, along with a 120A fuse. A high-output alternator and upgraded battery are recommended for sustained high-power use at full output.