Palmer PWT 05 MK2

I came to the Palmer PWT 05 MK2 as someone who needed reliable, low-noise power for a compact pedalboard without spending a fortune, and I ended up appreciating how unapologetically practical it is. My setup includes a mix of vintage-style and modern pedals that demand clean DC and sometimes a little extra current or voltage, so I put the unit through day-to-day rehearsal and a few small gig situations to see how it behaved under real use.

First Impressions

Right out of the box the PWT 05 MK2 feels built like a small stage-friendly tank - the metal case has real weight to it and the IEC mains inlet gives it a pro look that immediately told me this was not a flimsy wall-wart. I appreciated that Palmer bundles a decent assortment of cables - short and long leads, a 1-to-5 daisy, and two Y-cables for combining outputs - so I could get everything patched and playing within minutes.

Design & Features

The unit provides five individually isolated 9 V outputs, each rated at 250 mA, with center-negative polarity and dedicated overload and power LEDs - that isolation is the main reason it keeps pedals quiet on my board. Its layout is straightforward - all five coaxial jacks are accessible, the front panel includes the LEDs and a mains switch while the back houses the IEC inlet and a voltage selector for worldwide use, and the enclosure has mounting points and cable strain reliefs suited to fixed installation.

Build Quality & Protection

Build quality is a clear strength - the PWT 05 MK2 is heavier than most compact supplies because it uses a substantial transformer and proper internal components, and that shows in the feel and the absence of rattles. The overload LED and protection circuitry worked reliably during my tests - when I intentionally exceeded an output the unit flagged the condition rather than failing catastrophically, which gave me confidence in using it with various pedal types.

Power Flexibility & Cables

I liked that Palmer included two Y-cables - one to combine two outputs in parallel for 500 mA and the other to combine outputs in series to reach 18 V - these are handy when you need a bit more headroom for a hungry pedal or an 18 V stomp. The 1-to-5 daisy adapter is useful for powering low-draw pedals from a single isolated output, but I made sure the combined current draw stayed under the 250 mA limit for that output - the unit is not a monster of current, so planning is required.

Playability & Usability

Putting the PWT 05 MK2 under or on a board requires thinking about its 45 mm height and 1.5 kg weight - I mounted it under a small pedalboard frame using the built-in mounting points and cable strain-relief and it sat securely. Once installed the unit is extremely simple to use - plug, switch on, and the LEDs confirm power and overload states - and the lack of hum or ground-loop noise is immediately noticeable in both rehearsal room and amp-on settings.

Real-World Experience

In rehearsals the PWT 05 MK2 stayed dead-quiet - no hiss or ground hum crept into my chain when engaging noisy distortion or modulation pedals, which tells me the isolated outputs and the internal transformer design are doing their job. I did run into the natural limitation of 250 mA per output when experimenting with newer high-current pedals, and on one occasion the overload LED stayed lit even while the pedal still worked - a sign to me that the unit's protection circuit is conservative and that you should double-check combined draws when using daisies or Y-cables.

The Trade-Offs

The main compromises are current and size - if you build larger modern pedalboards with multiple high-current digital pedals you will quickly bump into the 250 mA-per-output limit and may prefer a module-based high-current supply. Also, the unit's height and weight make it less ideal for ultra-compact mobile boards, but for a small-to-medium rig that stays mostly in one place the trade-off is acceptable given the solid construction and quiet operation.

Final Verdict

The PWT 05 MK2 is a very sensible choice if you want robust, isolated 9 V power for a small-to-medium pedalboard without paying boutique prices - it delivers clean, quiet power, sensible protection, and useful cabling options in a solid metal package. I recommend it for beginners and gigging players who run mostly analog or modest-draw digital pedals and value isolation and build quality over maximal current - if you need multiple high-current rails you should look at higher-output supplies instead.