Parasound Halo A31 3-Channel Power Amplifier
Power Amplifier, 3 x 250watts, 8 ohm (Black Finish Only) Drop the A31 into your system and everything locks in: voices stand center‑stage, low end digs deeper without bloat, and effects surge with head‑turning impact. It’s the missing muscle your movies and music have been asking for. Designed by legendary audio engineer John Curl, it runs high‑bias Class A/AB (the first ~7 watts in pure Class A) with a direct‑coupled signal path for maximum clarity. A 1.5 kVA toroidal transformer and 98,400 µF of filter capacitance supply clean current on demand, while 250 W x3 into 8 Ω (400 W x3 into 4 Ω), balanced XLR and RCA inputs, and THX Ultra2 certification make integration straightforward in serious home theaters. 250 watts x 3 @ 8 Ohms / 400 watts x 3 @ 4 Ohms, Adjustable gain for up to +6db over THX Reference level, Unbalanced RCA and balanced XLR inputs, Circuitry designed by legendary John Curl, High bias class A/AB operation, Direct coupled (no capacitors or inductors in signal path), Complementary MOSFET driver stage and JFET input stage, 24 beta-matched 15 amp, 60 MHz bipolar output transistors, 1.5 kVA encapsulated toroid power transformer with independent, secondary windings for each channel, 98,400 µF power supply filter capacitance, DC Servo and relay protection circuits, AC present, channel status, high temperature indicators, Heavy-duty 24k gold-plated 5-way speaker terminals, THX Ultra2 certified, Auto turn-on by 12v trigger or audio signal, 4u Chassis, carry handles, rack mounting adapter included.
Specifications:
Frequency Response: 5 Hz - 100 kHz, +0/-3 dB at 1 watt.
Total Harmonic Distortion (THD): < 0.2 % at full power, < 0.03 %.
IM Distortion: <0.04%.
Input Impedance: Unbalanced - 47 kΩ, Balanced - 94 kΩ.
S/N Ratio: 112 dB, input shorted, IHF A-weighted.
Dimensions: Width: 171/2", Height without feet: 7", Height with feet: 7-5/8", Depth: 20".
Net Weight: 65 lb.
Shipping Weight: 79 lb.
