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Puritan Audio PSM156 Studio Master Mains Purifier

Puritan Audio PSM156 Studio Master Mains Purifier
Puritan Audio PSM156 Studio Master Mains PurifierPuritan Audio PSM156 Studio Master Mains PurifierPuritan Audio PSM156 Studio Master Mains Purifier
£1,395.00 £1,550.00
(£1,162.50 Exc. VAT)

Delivery In 5-7 Days

Free U.K. Delivery


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Puritan Audio
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Puritan Audio PSM156 Studio Master Mains Purifier (inc. 2 metre lead)

The PSM156 builds upon the brilliance of the legendary PSM136 retaining the precision symmetrically balanced circuitry and 6 fully independent outputs. 

Increasing the number of independently tuned filter elements from 39 to 52 enables your system to deliver even greater delicacy and detail whilst enhancing dynamics and punch.

The PSM156 will lift your system into a new dimension. Definition takes an enormous stride forward, individual instruments gain air between them with their sound and timbre becoming believable, the sound-stage will move out of your speakers and into the room with gains in three dimensionality with clarity definition and space between the instruments for them to interrelate rather than muddle each other.

Your listening will become a far more engaging and pleasurable experience.

Shipping typically 1-3 days
  • Rebalances the AC sine wave removing DC component, preventing transformer buzz and allowing them to breath properly at full efficiency.
  • Six 15 Amp Outlets each with independent refilter stages for both common and differential mode disturbances avoiding cross contamination between connected equipment.
  • 52 cumulative stages of purification removes common and differential mode interference, enhancing clarity, staging and dynamics.
  • Equal resistance routing to all outputs realises full dynamic performance.
  • Integral earth management system inbuilt with cleansed ground and star earthing format further lowers the noise floor and further enhances clarity and dynamics.
  • Internal wiring silver plated OFC copper PTFE insulated.
  • Massive 30,000 amps of three dimensional surge protection
  • Rated Voltage 110-250v AC 50/60Hz
  • IEC Type C20 Input
  • Electrically and magnetically shielded casing.
  • Dimensions W430, D230, H110.
  • Manufactured in the UK
  • 5 Years Guarantee
  • Awarded a 6 Moons Blue Moon (reserved only for “outstanding” products of “rare excellence”).

UK Delivery

  • FREE delivery via DPD Local By 12pm on orders to value over £300, including one hour delivery window service 'Predict & Follow My Parcel'.
  • Royal Mail Special Delivery By 1pm costs between £5.00 - £10.00 on orders to value under £300, dependent on weight.
  • Saturday or Sunday delivery available upon request for supplemental charge.

EU Delivery

  • £25 delivery charge 'Flat Fee' via DHL Europe by Road service (5-7 days) which provides comprehensive tracking of shipments online.
  • £50 delivery charge 'Flat Fee' via DHL Europe by Air service  (2-3 days) which provides comprehensive tracking of shipments online.
    Receiver is responsible for the payment of local Duties and Taxes.

USA & Canada Delivery

  • Services based on your order being shipped to the U.S. and Canada are calculated as follows:
    £100 delivery charge 'Flat Fee' via DHL international 'Day Definite' service per parcel.
    Receiver is responsible for the payment of local Duties and Taxes.


  • Not all products are available for order into Europe, USA & Canada


  • Full manufacturer's warranty on all new purchases. Standard warranty is typically 12 months to 2 years with some goods coming with 6 years manufacturer's warranty.
  • Goods purchased in UK and EU are covered by the Consumer Contracts Regulations.
Average Rating (5 Reviews):  
Write a Review and share your opinions!

Puritan PSM156
30 January 2024  | 

One of its claims (supported elsewhere on the Internet) is the removal of DC offset. My mains has only 5mv DC offset so I cant make an informed comment.

Where I have found it amazing, is in cleaning the mains supply, particularly noise introduced by Switched Mode Power Supplies SMPS

Brief History
I have been into Hi Fi for over 50 years. My system has evolved over those years and as the system got better all the normal attributes of Hi fi improved.
About 5yrs ago I was able to set up a dedicated listening room, but ironically this is when I became aware of an underlying harshness (glare) to everything I listened to. So in a traditional fashion I changed bits of gear (mainly valve stuff), then interconnects and speaker cables, then treated the room with absorbers and diffusers, then tackled component isolation. All the while I moved the system around the room to search out the best location. I even got my ears syringed in desperation

After all this time and effort, improvements to the Hi Fi were marked, but that slight glare still invaded all my listening, meaning my music sessions never went past 90 minutes. - Sad.

The Cure
Recently I became aware of the damage that SMPSs do to the quality of mains power, injecting high frequency mush back into the supply. A quick count up of my house revealed about 30 SMPSs not including my neighbours.
They were all invasive - 3 Alexas, 8 chargers, computers etc etc, even on one of my DACs and First Watt pre-amp.

As best I could, I turned off every SMPS and listened again. The improvement to the enjoyment of the music improved enough to justify the purchase of a Puritan PSM156

This was a revelation. My system now sounds fantastic and I listen for many hours without feeling the need to go and do something else.

Specifically music seem more real, more relaxing, more enjoyable. I see reviews elsewhere claiming more bass, better instrument separation etc, but I see it much more simply. Removing the MUSH has let the system breath


1. Silences within music and between tracks are blacker. Sometimes it seems like the whole system has turned off.
2. With MUSH removed everything is better defined
3. With MUSH removed small detail is revealed. This shows itself at the boundaries of the soundstage meaning the soundstage itself is wider and deeper
4. I can plug my Hi Fi SMPS devices alongside everything else with no downsides
5. My system sounds the same no matter what else is turned on in the house or what time of day.
6. The cost is spread over 5 devices so its easier to persuade yourself its good value
7. I have lots of experience and you will just have to trust me that spending this money on any other component(s) would have got nowhere near this improvement

The Puritan PSM 156 takes several hours to burn in
It can be left powered on 24/7, consuming just 0.2W of electricity
This device worked for me in my system. Your mileage may vary.

The care and service from Igloo Audio was first class

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1 of 1 people found this review helpful.

PSM 156
26 March 2023  | 

Swapped from a non-filtering distribution strip; difference was immediately apparent. Blacker background, music has more depth front to back. Tracks have greater 3D; instruments appear 3 dimensional, rather than a collection of instruments pasted on to a 2D canvass.

Track components also seem more articulate than without the 156, and the space of the recording is more apparent; the ambience of the room is easier to discern - greater atmosphere/emotion.

The PSM 156 to my mind should be considered a component, as important as any other in a system, it is that good.

Great product, no hyperbole, it does what it is advertised as doing. Now for Puritan's Grounding products

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This review has not been appraised.

Give this a go
15 January 2023  | 

Having read several reviews that were consistent in their very positive view of the Puritan, I decided to take the plunge and buy one. Any regrets? Absolutely not. This thing is quite simply superb in my system consisting of a WT Versalex, Leben CS600 and Harbeth P3s. It does what the maker claims and the reviews reflect. Very pleased.

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2 of 2 people found this review helpful.

Puritan Audio PSM156
05 December 2022  | 

Mains products are hit or miss but having several components with Toroidal Transformers I have been plagued but Transformer hum, watched a YouTube review of the PSM156 so took a chance, Igloo had a great deal and the unit arrived within a day or two. Plugged everything in and silence, no hum at all, then as I played some music I got improvement in detail, sound floor, cannot recommend enough

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6 of 6 people found this review helpful.

Excellent investment
21 April 2022  | 

I have found the Puritan 156 to be a great success. I am running a Lumin streamer to a pair of monobloc valve amps and active stereo subs. The Puritan removed all hums and buzzes from the power amps and I perceive a noticeable 'tightening' of the bass - and perhaps a better soundstage too. And it is great to be able to run the entire system through one mains socket and be confident enough to leave it permanently switched on. Highly recommended.

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2 of 2 people found this review helpful.

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