Rowen PT2000 Isolation Transformer, Silver

The Rowen PT2000 is an isolation transformer that galvanically isolates your hi-fi system from the mains and supplies up to five devices with filtered power.

Clean power sounds like voodoo at first – until you've heard what your home wiring does to your system every day. The 2000 VA toroidal transformer from Rowen, hand-built in Düdingen, smooths the mains voltage, keeps the high-frequency noise from switch-mode power supplies, LED lights and your neighbour's drill out, and gives your system the calm foundation it actually wants to play from. The silver fascia looks particularly good in open racks.

Why the Rowen PT2000?

Power isn't just power. What comes out of your wall socket is contaminated with interference all day long – every switch-mode power supply, every dimmer, every LED dumps noise into the grid. The PT2000 re-transforms the voltage from primary to secondary via a toroidal core, smoothing the sine wave and galvanically decoupling your gear from the rest of the household. High-frequency interference disappears, voltage spikes get absorbed, and your components' power supplies no longer have to fight through the mess – which relieves them and tends to benefit their lifespan. Four Swiss T13 outlets plus a Schuko socket supply up to five devices; the front-panel mains switch shuts down the whole system with one flip.

What you hear

The effect isn't a fireworks display, it's a clean-up. The background gets blacker, the playback calmer – and suddenly the soundstage stands cleaner in the room, with more air between the instruments. In the bass you gain contour and precision, fine dynamics and small details come through more clearly. Digital sources with rather tightly sized power supplies benefit most noticeably – DACs and streamers often thank the clean supply the most audibly. Overall, everything sounds a touch smoother and more natural, without the character of your system changing.

Who is the Rowen PT2000 for?

Plainly: the PT2000 pays off if your system resolves enough to show the difference – and especially if you live in an apartment or an older house with a noisy grid, where neighbours, light fixtures and household appliances all chip in. Digital front-ends benefit the most. It's less worthwhile if a high-quality power conditioner is already in your chain, or if your "system" is a Bluetooth speaker on the kitchen counter – then your money is better spent elsewhere. And: 21 kg wants a solid spot, not a wobbly shelf board.

Our verdict

The PT2000 is one of those Swiss-made classics you don't expect to make a difference – and that you won't want to take out of the chain once you've heard it. Solidly built, honestly effective, no showmanship. If you take the foundation of your system seriously, it starts right here: with the power. Tell us about your chain and your room, and we'll tell you whether the PT2000 is worth it for you.

What the press says

"The sound improves noticeably. […] Blacker background, deeper, more stable bass, more colour, more spaciousness." – hifitest 3/2026, overall verdict "very good" (5/5, high-end class).

Technical data

• Type: Toroidal isolation transformer (power conditioner)
• Power: 2000 VA
• Outputs: 4× T13 (CH, IEC type J), 1× Schuko (IEC type F) – up to 5 devices
• Galvanic isolation: yes
• Mains switch: front-mounted
• Housing colour: Silver
• Made: Swiss Made (Rowen, Düdingen)
• Dimensions (W×H×D): 21.5 × 14.2 × 30 (+5) cm
• Weight: 21 kg
• Warranty: 5 years
• Included: Rowen PT2000, user manual

Frequently asked questions

What does an isolation transformer like the Rowen PT2000 do sonically?
It galvanically isolates your system from the mains and smooths the voltage. Audibly, that shows up as a calmer, blacker background, more precise bass and a more cleanly layered soundstage. How strong the effect is depends on your system, your power grid and placement – with resolving systems it's usually clearly noticeable.

How many devices can I connect to the PT2000?
Up to five. The PT2000 offers four Swiss T13 outlets (IEC type J) and one Schuko socket (type F). That lets you power an amplifier, streamer, DAC and phono preamp from a single source. The front-panel mains switch cuts power to the whole system with one flip.

Do digital sources like streamers and DACs benefit too?
Yes, often even the most noticeably. Streamers and DACs frequently have compact power supplies that are sensitive to mains interference. The PT2000's galvanic isolation and smoothed sine wave take this load off them – you usually hear that as more calm and finer resolution in digital playback.

Do I need the PT2000 if I already have a mains filter?
Not necessarily. A pure mains filter and an isolation transformer work differently – the PT2000 isolates galvanically and delivers a strong 2000 VA. If a high-quality power conditioner is already in your chain, the added benefit is smaller. Tell us what you have, and we'll give you an honest assessment.

How big and heavy is the Rowen PT2000?
It measures 21.5 × 14.2 × 30 (+5) cm (W×H×D) and weighs around 21 kg. So the transformer brings some real weight and needs a stable, solid spot – ideally on a load-bearing surface near your system, not on a wobbly shelf board.

Why buy the Rowen PT2000 at HD Zürisee?
Because as an experienced team in Wädenswil, we know where clean power supply really makes a difference – and where it doesn't. We'll advise you on the right combination of transformer, mains cables and components, deliver and install on site on request, and handle the warranty properly. Call, write to us, or reach us via WhatsApp.

Pairs well with

You get the full effect with the right cabling – a good mains cable between the wall socket and the PT2000 isn't an accessory, it's part of the concept. Browse Mains filters & power conditioning, add high-quality Cables & connectors, or check out the AudioQuest solutions if you want to think the clean-power topic all the way through.