The Adcom GFA-5705 five-channel power amplifier is engineered for serious home cinema enthusiasts who demand uniform, high-current amplification across all five channels without compromise. Delivering 200 watts per channel into 8 ohms and 300 watts into 4 ohms from a massive toroidal transformer and identical per-channel circuit architecture, it brings explosive dynamics and effortless composure to even the most demanding surround sound loudspeaker systems.The Hi-Fi Centre Team TakeThe GFA-5705 solves a problem that plagues most home cinema setups: the weak link in the amplification chain. When every channel is driven by identical high-current circuitry, panning effects and surround soundfields become genuinely seamless — there's no audible timbre shift as sound moves from front to surround. The 200W per channel rating is conservative; the real story is the headroom, which means you can turn your system up to reference levels during intense film passages without the amplifier flinching. For anyone running a serious five-speaker array in a dedicated home theatre room, this is the foundation that the rest of the system deserves.Key Acoustic & Design Features Identical 5-Channel Architecture: Every channel uses the same high-current circuit topology, ensuring uniform tonal balance and seamless panning across front, centre, and surround speakers. Massive Toroidal Power Supply: A large toroidal transformer with extensive filter capacitance delivers stable current on demand for explosive dynamic peaks without sag or compression. Passive Extruded Heat Sinks: Heavy-gauge aluminum fins dissipate heat silently during demanding sessions — no fans, no noise floor interference. Authorized Dealer: Hi-Fi Centre is an Authorized Adcom Dealer — every purchase includes the full manufacturer's warranty and dedicated support from our team. Technical Specifications Brand: Adcom Model: GFA-5705 Type: 5-Channel Class A/B Power Amplifier Power Output (8 Ω, all channels driven): 200 W/ch (20 Hz – 20 kHz, 300 (20 Hz – 20 kHz) Input Sensitivity: 1.8 V rms (200 W/8 Ω) Input Impedance: 22,000 Ω Gain: 27 dB Inputs: 5x Balanced XLR, 5x Unbalanced RCA, 1x 12V Trigger Outputs: 5-way gold-plated binding posts Dimensions (H x W x D): 275 x 480 x 565 mm Weight: 36.7 kg (81 lbs)
