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QU3500.1D - Class D Monoblock Amplifier - 3500W
Brand New Quantum Audio QP5100D 5100 W Monoblock Class D Car Amplifier High SPL | eBay
QUANTUM AUDIO QA1800D 1800W MONO BLOCK D Car Amplifier
QE1600.1M - Monoblock Amplifier - 1600W
QEA2500.1D – Quantum Audio
Amazon.com: Brand New Quantum Audio Cozmik Series 4,000 Watts Dynamic Power (2000 Rms) Mono-block Car Amplifier with Built in Crossover, Sub-sonic Filter, Bass Boost Control, and Free Remote Bass Knob : Electrónica
QPX2000.1M – Quantum Audio
Quantum Audio QB 4150 Amplifier 4-150 not tested | eBay