Pyle QA-4400X mid-range 4-channel car audio amplifier

The Pyle QA-4400X is an older budget/mid-range 4-channel car audio amplifier from the early–mid 2000s. It was marketed mainly in Europe as an affordable multi-channel amp for beginner car audio systems. Description Main features commonly listed: 4-channel / 3-channel operation MOSFET power supply Built-in active crossover Bass boost 2-ohm stable Gold-plated terminals Aluminum heatsink Published specs vary depending on the market and advertising: realistic RMS: around 4 × 70W RMS @ 4Ω around 4 × 100W RMS @ 2Ω around 2 × 160–200W bridged claimed “max power”: usually advertised as 450W–1000W max Dimensions: about 35–42 cm wide roughly 5 kg Sound quality For its class: decent for basic systems okay for door speakers + small subwoofer not true high-power competition gear