The short answer

What is the Accuphase PS-1250?

Most power products sold for audio systems are filters. A filter sits between the wall and your components and tries to strip noise off the waveform that arrives, but the waveform itself, with its flattened peaks and distortion, passes through largely as it came. If the power in your building is dirty, a filter can only do so much with it.

The PS-1250 works on a different principle. Accuphase calls it a clean power supply, and the name describes the method. The unit takes in ordinary mains power, generates a clean reference sine wave of its own, and uses a power amplifier stage to rebuild the output waveform from that reference, correcting it in real time. The components plugged into its 8 outlets never see the waveform from the wall at all. They run on AC that the PS-1250 generated, held at a regulated AC 120 V within 1.5 V, with output waveform distortion of 0.08 percent or less.

Our own product page FAQ sums up the distinction this way: the PS-1250 “actively rebuilds the waveform and regulates output voltage, addressing distortion that filters cannot correct.” That is the whole idea of the product. It is not an accessory that conditions power. It is a power supply for your entire system, built the way Accuphase builds an amplifier, and at 42.1 kg it has the mass to match.

That display is more than decoration. Power problems are usually invisible, which is why listeners argue about them. The PS-1250 puts the incoming waveform and the regenerated waveform on the same panel, meters both, and lets you see the distortion the unit is removing. Owners who live with noisy mains, like the Toronto owner quoted further down this page, tend to describe the product in exactly those terms: bad power in, perfect AC out.

Specifications

What owners say

We will be straight about the size of this record. We searched the major audio forums, Reddit, and review sites for people who own a PS-1250, and the public footprint is thin: two owners who speak about the unit directly, one recommendation from a member of the dCS community forum, and show coverage from publications that heard systems powered through one. What follows is everything real that we found, in the owners’ own words. We would rather show you two genuine voices than a wall of invented consensus.

“I have a PS-530 and a PS-1250 for my amps. They clean up the crappy power with high distortion in may old downtown neighbourhood and regenerate perfect AC with very little THD.”

This Toronto owner runs both of Accuphase’s clean power supplies, the PS-530 and the PS-1250, for his amplifiers, in an old downtown neighbourhood where the mains power carries heavy distortion. His account is the clearest owner description of the product doing its core job: dirty power comes in, and the units regenerate clean AC with very little total harmonic distortion.

“replaced the C-2900 with the C-3900S and added a PS-1250 power supply. Amazing!”

This owner added the PS-1250 to a flagship Accuphase system built around A-300 monoblock amplifiers and a C-3900S preamplifier, with TAD CE1tx speakers, all bought new through an authorized Accuphase dealer. The whole report on the power supply is that one word, and in context it reads the way it sounds: the change was not subtle.

“Have a look at an Accuphase power supply: PS-550 or PS-1250 depending on the amount of power you need. Fewer gee-whiz features, build quality several notches up.”

In a thread about power delivery for a flagship dCS system, the poster was weighing a PS Audio P12. A community member pointed him to Accuphase instead, sizing the choice by capacity, the 400 VA PS-550 or the 900 VA PS-1250, and put the appeal plainly: fewer showy features, and build quality several notches up.

Where else the PS-1250 shows up

Journalist Matej Isak of audiodrom.net, writing about a listening visit, described a friend who “powers his setup … through the Accuphase PS-1250 active power supply,” a system whose components carry list prices totaling 160 thousand Euro, in a custom built and acoustically treated room he called “a truly awesome listening environment.” When someone assembles a system at that level, the power foundation is a deliberate choice, and the PS-1250 was the choice.

Stereophile’s Montreal Audiofest 2025 show report covered a room built on Accuphase electronics, A-300 monoblocks and a C-3900 preamplifier with KEF Blade One Meta speakers, powered through what the report called “an eight-outlet PS-1250 Power Regenerator.” The sound earned this description: “seamless tonal balance, solid imaging and center fill, and its completely unforced and organic presentation.” Show coverage is not an owner review, and we present it as nothing more than that, but it is consistent with what the owners above describe.

Five things owners praise about the PS-1250

1. It genuinely cleans up bad mains power

   The Toronto owner’s problem was measurable: high distortion on the power in his old downtown neighbourhood. His words for what the unit does are “regenerate perfect AC with very little THD,” which is the product’s entire reason to exist, reported by someone living with the problem daily.

2. The improvement is large, not subtle

   The WhatsBestForum owner dropped the PS-1250 into a system with A-300 monoblocks and a C-3900S preamplifier and summarized the result as “Amazing!” Nobody writes that about a change they have to strain to hear.

3. Build quality that outclasses rival regenerators

   The dcs.community recommendation over the PS Audio P12 rests on construction: “Fewer gee-whiz features, build quality several notches up.” At 42.1 kg, with a power amplifier stage inside doing the regeneration, the PS-1250 is built like the amplifiers it feeds.

4. It is the power foundation flagship systems choose

   A system with list prices totaling 160 thousand Euro runs through one. The Accuphase room at Montreal Audiofest 2025 ran through one. When cost is no object and the system has to perform, this is the regenerator that keeps appearing underneath it.

5. It does what passive filters cannot

   Regeneration rebuilds the waveform and regulates the output voltage, addressing distortion that filters cannot correct. Owners describe the outcome in output terms, perfect AC and very little THD, because the unit is not polishing the power it received. It is replacing it.

Features named by name

These are the specific technologies and fittings that Accuphase, dealers, and owners point to when they talk about this unit.

• Waveform Shaping Technology

  The core of the design. The PS-1250 compares the output against a clean reference waveform and corrects it in real time, rebuilding the incoming mains into a true sine wave rather than filtering the waveform that arrived.

• Reference Signal Generator

  An internal generator produces the reference waveform the output stage follows, using bandpass and band eliminate filtering to keep that reference at ultra low distortion. Everything downstream of it inherits its purity.

• Symmetric Dual Balanced Power Amplifier

  Regeneration is done by an actual power amplifier stage: two circuits of ten paralleled bipolar transistor output stages in a symmetric dual balanced layout, giving the output the low impedance and current delivery your amplifiers expect from the wall.

• Front panel waveform display and metering

  The center display draws the wave form itself, and the metering switches between voltage, distortion, and wave form for input and output. You can see the incoming distortion and the corrected output on the same panel.

• Regulated output voltage

  Output is held at AC 120 V within 1.5 V regardless of how the incoming line voltage wanders, so your components see the same power at noon and at midnight.

• Elaborate protection features

  A unit that sits between the wall and an entire system carries protection circuitry to guard the equipment downstream of it, part of why owners are comfortable running their amplifiers through it.

YouTube reviews

There are none that we can verify, and we would rather tell you that than dress this section up. We searched YouTube repeatedly, by model name and through the channels that review power products, and found no video review of the Accuphase PS-1250 from any reviewer. The only video mention connected to this product line is a forum post referencing a dealer video review of the Accuphase A-80 amplifier, which is a different product entirely.

If a credible YouTube review of the PS-1250 appears, we will add it here with the reviewer’s own words, the way we handle reviews on our other product posts. Until then, the owner accounts above and a listen in our showroom are the honest evidence available.

Honest criticisms

We looked for them, and we found none from owners. Across Audiogon, WhatsBestForum, the dCS community, Reddit, Audio Science Review, the Steve Hoffman forums, and StereoNet, there is no posted complaint about the PS-1250: nothing about reliability, noise, heat, or sound. We will state the limit of that finding plainly. With only two owners speaking publicly, no complaints surfacing is a small sample, not proof that none exist.

The single reservation we found anywhere came from the dcs.community thread starter, who noted before buying that the PS-1250 appears to cost roughly double a PS Audio P12. That is a shopper’s observation about price, not an owner’s criticism, and the reply he received recommended the Accuphase on build quality. What we can say on price is exact: at All Elite Audio the PS-1250 costs $15,975, and everything the unit does, the regeneration, the 900 VA of output, the construction, is where that money goes.

Frequently asked questions

Sources

Every owner quote on this page is reproduced verbatim from the linked discussion, and the specifications and price come from our own product page. Research current as of October 17, 2026.

• Audiogon Discussion Forum, “Accuphase vs Luxman” thread, owner toronto416 on his PS-530 and PS-1250
• WhatsBestForum, “My First Impressions of the Accuphase A80 Class A Amplifier” thread, owner post adding a PS-1250
• dcs.community, “Varese: Power delivery” thread, PS-550 and PS-1250 recommendation
• audiodrom.net, AAI Assoluto NSA special review, Matej Isak on a system powered through a PS-1250
• Stereophile, Montreal Audiofest 2025 show report, the Accuphase room and its PS-1250
• Headphone.Guru, AXPONA 2023 show conclusions, PS-1250 on display in the AXISS Audio room
• W&W Audio, dealer engineering description of the PS-1250
• All Elite Audio product page for the Accuphase PS-1250, specifications and price

All Elite Audio is an authorized Accuphase dealer in Timonium, Maryland. Product photo via Schuering High End. This post reflects the owner accounts and coverage we could verify on the date shown above; if you own a PS-1250 and want your experience included, contact the showroom.