Puritan PSM156

 

grk

268 posts

04-12-2026 at 11:30pm 

@audphile1

You don’t know what you are talking about! The Puritan 156 does NOT have transformers and does not emit EMF or  RFI.
 

@grk cool. See the picture above. Also, any component that has current flowing thru it will emit EMI/RFI. Unless it’s enclosed in a faraday cage.

pick up this tool and measure EMI near your components. https://a.co/d/05qmWo1d

 

Also, why would they put transformers in a device that is designed to remove transformer hum caused by DC?

good question. 156 removes the DC offset by means of filtering out the DC component and blocking it from reaching the outlets on the 156. That’s done with capacitors and active circuitry. Hence, once again, the components you see in the picture, including caps and coils. Your class D amps don’t draw much from the wall. Probably about the same as a a streamer or a cd player or a dac. No issues for your system. 

Correct me if I’m wrong…there are transformers directly in front of iec. The toroidal inductors and a bank of caps on the circuit board. That’s not current limiting? 
Claim is it will handle 15a. I know the pass mono blocks don’t draw that much at idle or during play. 

@audphile1 I've read MANY reviews and user experiences of the 156 and you seem to be the unicorn here. Maybe yours was defective or maybe your configuration was unique and caused problems! I've used 2 high quality and high current amps plugged directly in to the PSM-156 and noticed ZERO noise issues or current restrictions. I tend to trust the manufacturer over a random single person on the internet. Also if Puritan cared more about making money they would have just suggested to me to buy a 1512 that was well over $4000 instead of just  buying another 156.

@willywonka 

I am sharing my experience with you all. 

My unit was not defective. It worked fine but as stated I noticed reduced dynamics  Yes the noise floor was reduced. But it’s a cost I wasn’t willing to pay.
The icing on the cake / final nail in the puritan coffin, was when the 156 couldn’t handle the pass labs mono blocks that are way under the claimed current handling specs while in idle. It was tested without the amps in it, photographed and listed. 
I understand I’m some random guy and I get it that you have more trust in the manufacturer than you do in my experience.

I’m happy to hear it works for you. 
 

Been enjoying mine for a couple of years. Had a previous Coda integrated plugged in. never noticed any change/softening in dynamics. Currently have a couple of Laiv Ganm monos and seems to be working perfectly.

Was just at Axpona and noticed they make a plate with small out riggers for a vertical  orientation. $ 250 bucks I thought was a bit much. Anybody else with ideas?

Any forum members using the Ground master with it?  Grounding rod or their plug in?