PCD302 power line conditioner





Powering the audio equipment...   Caring for the music...

For more than three decades, JMF Audio had focused on the amplification and the transport of the audio signal, building a reputation for a natural rendering of music among music lovers, audiophiles and studio professionals. With time, questionnings regarding the influence of the mains power on the perceived sound quality became frequent. Thus we decided to study the subject, for our own sake, for our clients' statisfaction, for the music.  We measured, analysed, listened, made correlations... Tackling power line issues along with ensuring musicality, the challenge was high...    

We now can state that as much optimized an audio system can be it will never reveal its full potential without a clean mains power supply. Following the success of the PC3 power cord for the significant sound quality improvement that comes along, JMF Audio brings a total answer: the PCD302 power line filter and distributor, a world's first concept.

The PCD302's exclusive bi-directional and independent filtering principle suppresses power line disturbances coming from the outside as well as interactions between audio gears. 



Dual mono concept


Each mono section powered through an attached JMF Audio PC3 cord


Phase detection on each input


Bi-directional JMF Audio BDF223 filtering! 


The PCD302 contains 6 large, hand wrapped, potted BDF223 filters


10 filtered outputs of which 6 are totally independent


Sequential power output to reduce in-rush currents on the mains


Case and front panel size identical to the JMF Audio power amplifiers


A single front panel button to power-on and power-off the main power supply


Mounted on sub-chassis, acoustically floating, vibration free


Soundproof case


Total power handling: over 7kW


Operation from 100 to 240V AC automatic

Elegant concept:

With a simple gesture, on its front panel button, the PCD302 can start up and power down an entire JMF Audio setup, without risk of power line shutdown, without risk of "pop" in the speakers.

The sequential output power-up ensures a spread of in-rush currents over time.

The PCD302 is built around the same chassis as the JMF Audio power amplifiers, for a coherent stacking.

Simplicity of installation:

Two indicators on the rear panel light up to warn in case of phase reversal.

The operation from 100 to 240V AC, without servicing, makes installation internationally easy and safe.

Clear and extensive owner's manual provided.

Majestic listening result:

Wider soundstage, fluidity, sweetness, fullness, deeper bass. Which is typical of a JMF Audio element.

Whereas renown audio power line filters and conditioners only bring a slight improvement, at best, the persons who have had the privilege to listen with the PCD302 in our rooms or at home got turned over!


View of the 6 strips of JMF Audio BDF223 filters, hand wrapped, potted

The two warning lights in the middle indicate input phase reversal

The red dots on each output indicate the phase


Walnut finish

Rear view that shows the symmetrical dual mono concept, 

10 filtered outputs of which 6 are totally independent

Input through attached JMF Audio PC3 cords (no IEC plug)

Technical specifications:


Input current max 32A in total (16A nominal on each input) 
Output power max 7kW in total (3.5kW per channel / 230V)
Input power cord JMF Audio PC3 attached for each channel
Output socket Shuko Europe (US version possible on special order) 
Power-up type Sequential, from left to right
Input voltage range 100V to 240V AC (automatic, no servicing needed)
Case 19" size identical to HQS6002 and HQS7001 amplifiers
Weight 23kg
Finishes Aluminum machined, brushed, anodized, or wood walnut laser engraved


EU : PC3 cord Europe plug, Shuko output sockets

US : PC3 cord US plug, US output sockets

Owners' comments:

The JMF Audio PCD 302 power line conditioner has seduced music lovers from all areas. Whether these experienced audiophiles used to defend exotic cords, or electronic mains regenerators or whether the sound engineers used to simply ignore power line influence, they have found in the PCD 302 a relevant solution providing precision, fluidity, amplitude, greatness in the presentation of music.

We are thankful to the enthusiastic JMF Audio instruments-for-the-music owners for their feedbacks, comments and the wish for some of them to get the information published. 

However it has been decided to limit the comments on this page to just a few. Music enthusiasts are invited to discover and experience for themselves. JMF Audio would be pleased to guide and advise a representative.

Please refer to the Contact page and our Policy.



H. D. (HPM500, HQS9001, PRS1.5, DXC2.2-MKII, CM4, PC3) France

Comparison at the client's: "I thought my previous mains conditioning setup would defend better..." [teasing].

Once acquired: "Last week-end I reorganized all my system [...] How easy and quick it has become with the ability to power on/off with 1 button instead of 7 before!! And then:

- Definitely an improvement on musicality with respect to my previous filters!

- Better sharpness, a veil has been removed, a greater definition of the sound stages, three dimensional space!

- Music becomes more lively, more touchable, and comes the wish to listen even louder [...]

- Real significant gap, as experienced on the first test together at home, and even better when placing the sources on the PCD302 as well instead of on the [Japanese make]." (via email)


C. M. (HQS9001, PRS1.5, DXC2.2-MKII, CM4, PC3)

Prototype demo at JMF Audio: "What a surprise. For sure we did not expect a mains filter from JMF Audio" [...]

Once acquired: "My first feelings on the JMF Audio filter [...] : indisputably an exceptional sonic improvement! In a few words: less hardness, more natural and a fluidity second to none, even on violent passages. A full and ample sound, far from the HIFI tones of the competition. Please warn the next persons that testing is adopting because it is almost impossible to get back to the previous listening. Again congratulations for this step forward that sets a milestone." (via email)


A. M. (HQS9001, PRS1.5, DXC2.2-MKII, CM4, PC3) (2013):

"Just a message to report about the result of my long listenings last week end. In summary it is an excellent result. I did not expect something so obvious. With the demo, we already noticed that a veil had been removed showing a much clearer sound. Now I have been able to appreciate the change on the sound stage. In several recordings we catch very easily the dimension of the room (in which the musicians perform). I made long listenings at high level and this was very pleasant, without fatigue. Congratulations it is remarkable and I am not surprised with the success."


O. G. (HQS7001, DXC2.2-MKII, SR8, CM4, PC3), Paris:

"When I got the PC3 power cords, I bypassed my former audiophile mains conditioner. Therefore I was confident about the PCD302 mains filter. Moreover, the filtering principle pleased me. In the end the PCD302 is also highly effective at home. There is more air. Sound is free of granularity. Overall, there is more music. When removing my PCD302, it is like if there were artifacts, especially in the top end"


G.T.A. (tube amplifiers user) Singapore:

"I am buying it blind. I hope I won't be disappointed since my standard is extremely high"

After reception: 

"It is the best that I have ever heard! It surpasses all AC conditioner out there. Dynamic no compression at all! Images are rock solid. And bass solidity improves tremendously. And there is a lot of tonal color. Punch and attack are all there! I need to import at least another one." (via email)


Tan H.F., Malaysia:

"PCD302 received with thanks. Indeed, it performs superbly... Quietens the system to allow the music to flow through effortlessly. [...] You can use my comments anyway you want." via email (2015)


J-M. B, France (2015) :

"I realized some time ago that the quality of the mains current was as important as the balanced association of audio devices in a playback system. I then acquired [power line conditioning] materials on a large scale basis, which seemed to provide interesting results [...]. After having tested and adopted the JMF Audio PRS1.5 as a preamplifier, I had the chance to test the PCD302 mains conditioner for a few days. I must say that the result was just magic! Natural music without coloration either in timbres or in energy, as opposed to what some cables and conditioners do. So I bought it. Although the investment can seem high, I find it justified with respect to the market and to the musicality it brings to a good system. To test without a doubt before considering a more or less hazardous combination of mains distributors, conditioners or cables in high-end. [...] You can post my comment." 


A. K., Turkey (2015):

"I installed the PCD302 over the weekend. This wonderfully crafted unit replaced my 4 [audiophile] filters perfectly. I am amazed with its musicality, natural but detailed sound and exceptional dynamism. Many thanks for your excellent product and your fast and accurate logistics support. As an additional comment, I’m using TAD CR1 speakers. I had no problem with their ultimate precision, fast , dynamic and detailed performance until now, however this is the first time they sound so warm and musical as well. The PCD302 unleashed what was hidden..."


M. O. (2018):

"I was fortunate to be able to buy the JMF Audio 302. To make it clear and fast, I was expecting some improvement ... It actually is a real revolution in my system .... the veil of colorations that I wanted to get rid of disappeared, leaving room for a realistic window on the music. Everything is in its place with a precise trimming and aeration around the instruments that no power cable had been able to offer me so far. The nuances, the clarity of the interpretation, the dynamics, all this made a leap forward! This device is essential !!!! It metamorphoses the listening so much. It is without a doubt one of the secrets of the JMF Audio Sound, neutral, very readable. Everything is more real, palpable. Congratulations to JMF Audio on this great product."
"I authorize you to post this comment because this product is wonderful!"
(via e-mail).



Morten Lindberg, Lindberg Lyd AS studios, 2L (classical music), Multiple Grammy Awards nominee (2016):

"The PCD302 lowered the background noise in our recordings [...]. We will use it in our recording unit..."

 > See report and measures  


Grammy Awards :

For the first presentation of albums recorded with the PCD302, label 2L received four nominations for the 60th Grammy Awards!

> Read article


Revisions history :

   F   Further improved openness of sound with modified internal circuit.
   E  Added proprietary AUTOMATIC GROUNDING and ISO5 systems. Revised internal cabling. 
   D, C, B Following evolution of the PC3 cords, modified cabling, improved breath of music.
   -  Initial release


JMF Audio products are designed to be references and to last. The base of these instruments is safe and modular. Upgrades are proposed for clients to take advantage of the results of our continuous research and development efforts, without the need for product change. It means "details", but details make the differences and can lead to the exceptional. The device revision (B, C, D...) is indicated by a silver badge located on the rear panel and is linked to the product serial number in JMF Audio's tracking files. 

> More information about our upgrade policy.

We wish to maintain a close relationship with users. We invite you to register your product so as to be informed of the last evolutions and cvpossibilities we offer.


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