A Dedicated Power Amplifier with Finesse and Musicality at Heart

The 9-channel PA-MC5501 is Onkyo'’s top-of-the-line power amp, designed to partner a high-end pre-pro of your choice. As an all-analog amplifier, the PA-MC5501 is built to deliver powerful, well-balanced amplification free from digital noise interference. The precise, high-power performance comes courtesy of components and design features that will impress even the most demanding audiophile. Onkyo'’s trusted WRAT amplifier philosophy ensures low negative feedback and high instantaneous current capability. Meanwhile, customized capacitors, large transistors, gold-plated terminals, and a massive toroidal transformer exemplify the units superb engineering standards. In recognition of this, the PA-MC5501 boasts THX® Ultra2™ certification: the ultimate guarantee of amplification quality.

THX® Ultra2™ Certified

When a home theater component receives THX certification, it is your guarantee that it will accurately present movies the way they were mixed by the filmmaker in the studio. In the case of THX Ultra2 certification— the ultimate benchmark for home audio performance— a power amplifier must offer high-quality, high-output performance for multi-channel playback in large rooms. Among the strict criteria that THX uses for judging the quality of a power amplifier are measurements of continuous power output, distortion levels, and heat generation.


THX Ultra2 Certified
# Channels 9
Rated Power Output
20 Hz to 20 kHz, 0.05% THD (FTC) 150W Min. @ 8 ohms
Continuous 6 Ω Rated
Continuous 4 Ω Rated
WRAT (Wide Range Amplifier Technlogy)
Amplifier Frequency Response 5 Hz-100 kHz
(+1 dB,-3 dB)
Push-Pull Amplification Design with Three-Stage In
All Discrete Output Stage Circuitry
Massive Shielded Toroidal Transformer
Independent Power Supply 3
Large Capacitors for Effective Power Supply ✓ (x2)
(Customized 22,000 Microfarad Each)
Reference Grade Capacitors X
(Audio Tuned for Each Channel)
Large, Custom-Designed Power Transistors
Low-Impedance, Copper Bus Plates for Perfect Ground
High-Current, Low-Impedance Circuit Boards with Th


Gold-Plated XLR Inputs
Machined Solid Brass RCA Inputs
Gold-Plated, Transparent Binding Posts ✓ (5-way)


Multi-Zone Capability (up to Zone 3)*
Bi-Amping Capability*
12 V Trigger Input
Auto Power Down Function
Flat, High-Rigidity, Anti-Resonant Chassis ✓ (1.6 mm Thick)
Aluminum Front Panel
Detachable AC Cord
Warranty 2 YEARS
*Depending on A/V Controller


Power Output
All Channels 150 W/Ch at 8 ohms;
20 Hz-20 kHz, 0.05%; 2 Channels driven, FTC
Dynamic Power             400 W (3 ohms, Front)
300 W (4 ohms, Front)
180 W (8 ohms, Front)
THD (Total Harmonic Distortion)             0.05 %
(Rated Power)
Damping Factor             60 (Front, 1 kHz, 8 ohms)
Input Sensitivity and Impedance             1 V/47 k-ohms (Balanced)
2 V/22 k-ohms (Unbalanced)
Frequency Response             5 Hz to 100 kHz (+1dB, -3 dB)
Signal-to-Noise Ratio             110 dB
(Unbalanced, IHF-A)
Speaker Impedance             4 ohms –16 ohms; or 6 ohms–16 ohms


Power Supply             AC 120 V, 60 Hz
Power Consumption             11.7 A
Dimensions (W X H X D)             17 1/8" x 7 13/16" x 17 9/16"
435 × 198.5 × 446.5 mm
Weight             48.9 lbs (22.2 kg)