ESX QL800.1 Mono Class D Amplifier

The ESX QL800.1 is a QUANTUM QL mono Class D digital amplifier for compact subwoofer-focused car audio installations. The official ESX page confirms 1 x 325W RMS at 4 ohm, 1 x 550W RMS at 2 ohm and 1 x 800W RMS at 1 ohm.

It includes high-level input with EPS, auto turn-on, Start/Stop readiness, a MOSFET PWM power supply, 3-way protection, subsonic and low-pass filtering, bass boost, phase shift and a compact bass remote controller.

Key specifications

• Mono Class D digital amplifier
• 1 x 325/550/800W RMS at 4/2/1 ohm
• High-level input with Error Protection System (EPS)
• Subsonic 10-40 Hz and LPF 40-150 Hz
• Bass boost 0-18 dB and phase shift 0-180 degrees
• Compact bass remote controller included
• Dimensions 226 x 43 x 120 mm
• Efficiency up to 92%

Best used for

Use the QL800.1 as a space-saving mono amplifier for a dedicated subwoofer system where 1 ohm stability, remote bass control and OEM-friendly high-level input are useful.

Setup note

Subwoofer impedance and wiring layout matter on mono amplifiers. If you are unsure how to wire this into your vehicle, send us your system details by WhatsApp or email before ordering and we will help check the setup.