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Naim Audio


Regular price $8,999.00 USD
Regular price Sale price $8,999.00 USD
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NPX 300

Optimised power and performance

Reach a higher level of musical performance with the NPX 300 power supply for the 200 Series sources and preamplifiers, including the NSC 222 streaming preamplifier.
NPX 300 deactivates the internal power supply, immediately reducing noise, and provides a superior, cleaner power supply. You can connect several NPX 300 power supplies within the same configuration for an exceptional musical experience.



The NPX 300 powers your system in a silent, fluid way, allowing the preamplifier to concentrate on its main task: controlling the signal. In addition to improving the performance of the NSC 222 preamplifier and streamer, the NPX 300 can be used to upgrade several Naim products, lending them immense flexibility over time.



Controlled power

The NPX 300 incorporates a new transformer, which works with six exclusive Naim power regulators (DR technology - Discrete Regulator), providing a cleaner power to your system. Less “noise” means a better sound!
It works perfectly with the 200 Series products, and is also compatible with the NDX2 or even the NAC-N 272 – you just need the specific cables.  




Inspired by the best

At Naim, all our choices are made with the aim of creating a unique emotional connection with music,and offering you the best products in their category. The NPX300 includes a certain number of innovations used on the flagship Naim 555PS DR power supply, such as the separation of the digital and analog power supplies via dedicated Burndy cables.


The story of Naim and aluminium

Our founder, Julian Vereker, immediately understood the many benefits of aluminium as a material for wrapping Naim electronic components. He knew that delicate audio components are very sensitive to the effects of magnetic fields, unstable temperatures, unwanted vibrations, etc. While other manufacturers were bending thin sheets of steel, Naim used thick plates of aluminium.

The Naim Classic range maximises this highly technical and durable approach, with aluminium housings rivalled only by Statement, our flagship product. Naim chose a superior-quality aluminium, which optimally combines thermal and microphonic properties. The front panels are treated with solid 20mm-thick aluminium billets; heat sinks frame the side panels and 5mm plates cover the top and bottom surfaces of the products. The aluminium is brushed, sandblasted and anodised to guarantee unalterable beauty throughout the product's life. The New Classic range can be immediately distinguished with one look and one touch, before the first note of music even plays.



The Naim NPX 300 - The Difference Is Not Discrete - Read More 

"I was very skeptical when first trying out Naim power supplies. The first time I heard their 555 PS power supply being added to a NDX2 streamer it literally took seconds for me to realise I was completely wrong. However, there is a problem when I take the power supply out of the system. It’s like splitting a mother and child, they are genuinely meant to be together, the fine picture that the three units paint together, becomes less clear as a pair. It’s certainly very hard to go back…" - Kerrin, Matt and Nick

Naim celebrates 50 years with new Classic series for streamers and record spinners alike - Read More 

"Another potential partner in crime for the NSC 222 is the NPX 300 power supply, which Naim says offers an “instant upgrade” for the streaming preamp by disabling its internal power supply, thus reducing the noise floor, and delivering to it “superior, cleaner” power." - Becky Roberts



Naim logo White illuminated
Connectivity Micro USB (update only)


Weight 31.75lbs (14.4kg)
Dimensions (HxWxD) 35/8x17x121/2" (9.15 x 43.2 x 31.75cm)


Mains Supply 115V or 230V, 50/60Hz
Power Output Type 3, Type 4
Power Consumption Standby <0,5W

Product Type

Type Power supply