Accuphase PS-1250 Power Supply

Accuphase PS-1250 Clean Power Supply

A reference-grade AC power regenerator built to give every connected component the cleanest electricity it will ever see.

What the PS-1250 Actually Does

The Accuphase PS-1250 is not a passive filter or a surge strip. It is an active power regenerator that takes the AC coming out of your wall, which in almost every home carries some amount of distortion, noise, and voltage sag, and rebuilds it into a clean, stable sine wave before it ever reaches your amplifier, DAC, or turntable. The difference matters because every piece of audio electronics you own uses that incoming AC as its raw material. Feed it dirty power and even the best amplifier is working against a noisy foundation. Feed it the PS-1250's output and that same amplifier has nothing left to fight.

How the Regeneration Circuit Works

Inside the PS-1250, a reference signal generator builds an ideal sine wave from scratch, independent of whatever is coming in from the wall. The unit then compares your home's actual incoming AC against that internally generated reference and corrects the difference in real time, filling in what's missing and stripping out what shouldn't be there. This happens across three stages. A line filter first removes high frequency noise from digital sources and switching power supplies elsewhere in your home. A large shielded toroidal transformer then removes common mode noise. Finally, a balanced correction amplifier, built around a 20 transistor push pull output stage, finishes shaping the waveform into the clean sine wave that reaches your gear. The result, measured by Accuphase, is a reduction of third order harmonics from negative 40 decibels down to negative 80 decibels, and a total harmonic distortion figure of 0.08 percent or less at the output.

The Real-Time Display and Why It Matters

The PS-1250's front panel carries a color display that shows output power in VA, input and output voltage, input and output distortion percentage, and a live waveform overlay comparing what's coming in against what's going out. This is not decoration. It lets you actually see how much load you've placed on the unit, which matters because the PS-1250 is rated for 900VA of continuous output and will flash a warning if your connected gear pushes past 1,200VA. Since the VA draw of an integrated amplifier or power amplifier changes with volume level, this display is how you confirm your system stays comfortably within the PS-1250's capacity even at higher listening levels.

Build Quality, Size, and Where It Lives in a System

This is a substantial component. The 120V version weighs 42.1 kilograms, or 92.8 pounds, and measures 465mm wide, 243mm tall, and 499mm deep, roughly 18.3 by 9.6 by 19.6 inches. That size and weight come from the large toroidal transformer and the two 48,000 microfarad filtering capacitors inside, the same kind of heavy, high current parts you'd expect inside an Accuphase power amplifier rather than a typical power conditioner. It cools entirely through natural air convection with no internal fan, so it runs silently and won't introduce any mechanical or electrical noise of its own. Plan for a sturdy shelf or the bottom of an equipment rack, since this is not a component you want sitting on a flexible glass shelf.

Choosing Between the PS-1250 and the PS-550

Accuphase makes two Clean Power Supply models, and the question we hear most often is which one a given system actually needs. The PS-550 is the smaller of the two, built around the same regeneration technology but rated for roughly 500VA of continuous output and housed in a smaller, lighter chassis with fewer output terminals. The PS-1250 nearly doubles that capacity at 900VA continuous, with a correspondingly larger transformer, larger filter capacitors, and more output terminals on the rear panel. If you're powering a single integrated amplifier, a DAC, and a streamer, the PS-550 is often enough. If you're running a higher powered amplifier alongside a turntable, a phono stage, and digital sources all at once, or you simply want headroom to add components later without recalculating your VA budget, the PS-1250 is the one built for that load.

Who the PS-1250 Is For

The PS-1250 makes sense for a system where every other weak link has already been addressed: good speakers, a capable amplifier, solid cabling, and a listening room that's been treated with at least some care. At that point, the AC power feeding the whole system becomes the next limiting factor, and it's one most people never think to address. Owners typically describe the change as a deeper, more settled bass response, a quieter background between notes, and a soundstage that holds its shape more convincingly at higher volumes. It is equally useful for digital and analog sources, since digital gear benefits from reduced jitter and interference while analog gear benefits from a quieter noise floor and more stable voltage delivery to its power supply.

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Key Specifications

• Model: Accuphase PS-1250 Clean Power Supply
• Price: $17,575.00 USD
• Rated Output Capacity: 900 VA continuous
• Rated Output Voltage: AC 120V ±1.5V (120V version) or AC 230V ±3.0V (230V version)
• Rated Output Current: 7.5A (120V version) or 3.9A (230V version)
• Output Frequency: 50Hz or 60Hz, matching input frequency
• Output Waveform Distortion (THD): 0.08% or less
• Rated Input Voltage: AC 120V ±10% (120V version) or AC 230V ±10% (230V version)
• No Load Power Consumption: 37W (120V version) or 55W (230V version)
• Filtering: Two 48,000 μF/100V filtering capacitors with a large shielded toroidal power transformer
• Output Stage: Balanced correction amplifier with 20 parallel push pull output transistors
• Display: Color display showing output power (VA), input/output voltage, input/output distortion, and live waveform
• Cooling: Natural air convection, no fan
• Dimensions (W x H x D): 465mm x 243mm x 499mm (18.3" x 9.6" x 19.6")
• Net Weight: 42.1 kg / 92.8 lbs (120V version) or 41.3 kg / 91.1 lbs (230V version)
• Shipping Weight: 51 kg / 113 lbs
• Included Accessory: AC power cord
• Warranty: 3-year limited manufacturer warranty through Accuphase's authorized U.S. distributor; ask our team to confirm current terms at time of purchase

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Why Buy From All Elite Audio

All Elite Audio is an authorized Accuphase dealer, which means every PS-1250 we sell is sourced through Accuphase's official U.S. distribution channel, carries a full factory warranty, and is backed by our own setup and support after the sale. Power conditioning is one of those upgrades that's easy to get wrong on paper and hard to evaluate without hearing it in a real system, so we'd rather talk through your specific amplifier, sources, and total VA load before you commit to one unit over another. Reach out and we'll walk you through it.

Call: 443-402-5055
Text: 443-402-5064
Visit: 1921 York Rd, Timonium, MD 21093

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FAQ

Does the Accuphase PS-1250 have a phono preamp built in?
No. The PS-1250 is a power conditioner, not a phono stage or a preamplifier of any kind. Its job is to clean and stabilize the AC power feeding your equipment, not to amplify or process any audio signal. If you're shopping for a phono preamp for your turntable, that's a separate component entirely, and Accuphase makes several, including the C-47, which we can pair with the PS-1250 if you're building out a full system. The two products solve completely different problems even though they often sit in the same rack.

Does the PS-1250 come with a cartridge or any turntable accessories?
No, the PS-1250 ships with nothing related to a turntable. It includes only its AC power cord, since it is an AC regeneration device meant to sit between your wall outlet and your equipment, not a phono component. If you're assembling a turntable setup and need a cartridge recommendation alongside the PS-1250, our team can put together a complete signal chain that benefits from the clean power this unit provides. The PS-1250's value to a turntable rig comes from quieter, more stable power to the phono stage and preamp, not from anything connected directly to the turntable itself.

How does the PS-1250 compare to the smaller PS-550?
The PS-550 and PS-1250 share the same waveform regeneration technology, but the PS-1250 is rated for roughly 900VA of continuous output compared to the PS-550's roughly 500VA, and it houses a larger transformer, larger filter capacitors, and additional output terminals to match. The PS-550 suits smaller systems, such as a single integrated amplifier paired with a couple of digital sources, where total power draw stays modest. The PS-1250 is the better fit once you're running a higher powered amplifier alongside several other components at once, or you want headroom to add gear later without running out of capacity. Either way, both units improve sound quality the same way, the PS-1250 simply has more room to work with.

What does "total harmonic distortion" mean on this spec sheet, and why does 0.08 percent matter?
Total harmonic distortion, or THD, measures how far a power waveform strays from a perfect, smooth sine wave. The electricity coming out of a typical home outlet is already distorted by other appliances, dimmer switches, and the power grid itself, and that distortion can carry through into your audio system and color the sound. The PS-1250 reduces that distortion to 0.08 percent or less at its output, which is extremely low compared to unconditioned household power. In practical terms, this is part of why systems running through the PS-1250 tend to sound quieter and more settled, with less low-level grain sitting underneath the music.

What else do I need to actually use this with my system?
Not much. The PS-1250 includes its own AC power cord, plugs into a standard wall outlet, and then your amplifier, DAC, turntable, or other components plug into the PS-1250's output terminals instead of directly into the wall. The main thing to plan ahead of time is your total VA load, since the unit is rated for 900VA continuous and will warn you if you exceed roughly 1,200VA across everything connected. Beyond that, no special wiring, rack hardware, or additional accessories are required, and our team is happy to walk through exactly which of your components should plug into it.

Is the PS-1250 a battery backup or UPS?
No. The PS-1250 does not store energy and will not keep your system running if the power goes out. It draws power continuously from the wall, reshapes that incoming power into a clean sine wave, and passes it through to your connected components in real time. If you're also looking for outage protection, that's a separate category of product, and we'd recommend treating it as an addition to the PS-1250 rather than a substitute for it.

How many components can I connect to the PS-1250 at once?
The PS-1250 has multiple output terminals on its rear panel specifically so you can connect several components at the same time, with the front panel VA meter letting you track your total combined load against the 900VA continuous rating. In practice, most owners connect their amplifier or integrated amp, a source or two such as a DAC or CD player, and sometimes a phono stage, all at once. The limiting factor is total power draw rather than the number of physical connections, so it's worth checking the VA rating of your specific gear, particularly your amplifier at higher volumes, before finalizing what's plugged in.

Will the PS-1250 work with both my digital and analog gear?
Yes. The PS-1250 benefits any component that runs on AC power, regardless of whether it's processing a digital or analog signal. Digital sources like DACs and streamers tend to benefit through reduced jitter and a quieter noise floor, while analog gear like phono stages and preamplifiers benefit from steadier, lower noise voltage to their internal power supplies. There's no compatibility concern between component types here, the PS-1250 simply improves the quality of the AC power every connected device receives.

Does the PS-1250 run hot or make any noise?
No. The PS-1250 cools entirely through natural air convection, with no internal fan, so it operates completely silently. It also doesn't rely on the kind of digital switching circuitry that can introduce its own high frequency noise into a system, which is part of why Accuphase designed it around analog correction circuitry instead. You can place it in an enclosed rack or cabinet without worrying about airflow the way you might with a more heavily ventilated component, though normal spacing is still good practice for any electronics.

Where can I buy or audition the Accuphase PS-1250?
The Accuphase PS-1250 is available now through All Elite Audio, an authorized Accuphase dealer with a full home audio showroom where you can hear the difference it makes on a real system before buying. Call us at 443-402-5055 or text 443-402-5064 and we'll set up a time to walk through your current setup and talk through whether the PS-1250 or the smaller PS-550 makes more sense for your system. You're also welcome to visit us directly at 1921 York Rd, Timonium, MD 21093 to see the unit in person and ask any questions in our showroom.