Accuphase · A Series
$24,975
Accuphase · A Series
The A-300 is Accuphase's fiftieth-anniversary reference: a pure Class A monaural amplifier rated at 125 watts into 8 ohms that doubles to 250, 500 and 1,000 watts into 4, 2 and 1 ohm from twenty parallel push-pull MOS-FETs.
Price is for one monaural amplifier. A stereo system uses two.
Authorized Accuphase dealer · Delivery and installation by Pearl Audio · Trade-ins welcome
The story
Created to mark fifty years of Accuphase, the A-300 is the company's definition of the ideal Class A power amplifier. Twenty parallel push-pull power MOS-FETs run in pure Class A, arranged as an instrumentation amplifier with balanced inputs, behind a large toroidal transformer and 100,000 µF of filter capacitance. Output doubles with each halving of impedance, to 1,000 watts into 1 ohm on music signals, and a pair bridged delivers 500 watts into 8 ohms. Double MCS+ voltage amplification, current feedback and balanced remote sensing produce a damping factor above 1,000 and a signal-to-noise ratio of 130 dB.
Stereophile's Jason Victor Serinus reviewed the A-300 in December 2023, and the magazine named it its 2024 Amplification Component of the Year. Each chassis weighs 101 pounds, idles at 230 watts and carries a bar-graph and digital power meter with adjustable hold. A pair of A-300s with the C-3900S preamplifier and DP-770 player is the Accuphase reference system, and it is what we would build for a listener who wants pure Class A without compromise on speaker choice.
Accuphase builds every component in a single finish, so there is nothing to choose. The champagne-gold front panel has been the house signature since 1972.
| Type | Monaural power amplifier, pure Class A |
| Rated output (20 Hz–20 kHz) | 125 W into 8 Ω; 250 W into 4 Ω; 500 W into 2 Ω; 1,000 W into 1 Ω (4 Ω and below on music signals) |
| Bridged output (two units) | 500 W into 8 Ω; 1,000 W into 4 Ω; 2,000 W into 2 Ω (music signals) |
| Output stage | Twenty parallel push-pull power MOS-FETs, Class A, instrumentation-amplifier configuration |
| Total harmonic distortion | 0.03% (4–16 Ω); 0.05% (2 Ω) |
| Frequency response | 20 Hz–20 kHz, +0/−0.2 dB (rated output); 0.5 Hz–160 kHz, +0/−3 dB (1 W) |
| Damping factor | 1,000 or greater |
| Gain | 28 / 25 / 22 / 16 dB, selectable |
| Input sensitivity / impedance | 1.26 V for rated output; 40 kΩ balanced (XLR), 20 kΩ line (RCA) |
| Signal-to-noise ratio | 130 dB (max gain); 135 dB (−12 dB gain); A-weighted, input shorted |
| Power supply | Toroidal transformer; 100,000 µF filter capacitors |
| Power consumption | 230 W idle; 270 W (IEC 62368-1) |
| Dimensions (W × H × D) | 18.3 × 9.4 × 20.3 in (465 × 240 × 515 mm) |
| Weight | 101 lb (46.0 kg) each |
| Sold as | Each (monaural); two required for stereo |
The reference power amplifier, sold per unit. The A-80 is the stereo Class A alternative; the P-7500 gives Class AB power in one chassis.
Pair two A-300s with the C-3900S preamplifier and the DP-770 player for the full Accuphase reference system.
Plan your Accuphase system with Pearl Audio
Pearl Audio is an authorized Accuphase dealer in Portland, Oregon. We can help with system matching, delivery and setup, and arrange a listening appointment. Call (503) 222-2599 or email sales@pearlaudio.com.
The Pearl Audio experience
A system at this level should be heard, thoughtfully matched, and properly set up. From the first audition to long-term ownership, you work with the same people, in person.
Hear the A-300 Mono Power Amplifier by appointment in one of our two purpose-designed demonstration rooms, with your own music and time to compare without pressure.
We deliver and install throughout the Portland area, taking care of placement, connections, ventilation and system configuration ourselves.
We support everything we sell for as long as you own it, whether the answer comes by phone, in your home, or through factory service.
Trade-in assistance and qualifying 100% Trade-Up options give you flexibility when your listening priorities or your system change.
