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Naim NPX TT power supply

Sale price£2,699.00
1 in stock

Sales ☎ 01925 828009

Naim Audio NPX TT power supply is an upgrade to the power supply for the NVC TT phono stage. It has dedicated sections for digital and analogue and will provide the best possible power source for this excellent phono stage.

Firstly, a large transformer is used for good transient response. The separate feeds for the digital and analogue circuits prevent any mutual interference. Finally, Naim uses their own DR power design that outperforms other designs.

Why a separate PSU?

Using the NPX TT power supply to drive the NVC TT preamplifier should remove any possible sources of magnetic and mechanical interference. As a result, the sensitive internal electronics can work at their best. The upgraded PSU also separates the digital and analogue power feeds. This prevents any interference from crossing over between sections.

Power supplies use large mains transformers, that generate both mechanical and electrical noise. With a separate PSU, this is moved away from the Audio signal path. Moreover, noise from the rectifiers can also get into the grounding system adding mush and interference to the sound. As a result, Naim has developed their own power supply design, known as DR or Discrete regulator.

The Naim DR power system

The Naim DR power system is used throughout the range and gives a stable and clean output. It may seem simple to design a power supply but several factors complicate the issue. For example, many different voltages are required for different stages. Moreover they can mutually interfere with each other. The signal from a turntable phono cartridge is very fragile and noise can affect the sound if not controlled. Hence the NPX TT has dual supplies. Cheaper units can use monolithic voltage regulator ICs. These are convenient but can be unstable and have limited output current capability.


Product Type

Switchable MM/MC phono stage with MC load adjustment

Audio Outputs

Max output signal: 8 Vrms

MM: 22dB ref 5mV input
MC (low & high gain): 23dB ref 0.5mV input low gain setting, 17dB ref 0.5mV high gain setting


Audio Inputs

MM: (Partial) – 2dB at 20Hz and -3dB at 14Hz

Audio Inputs
Power Amp In

+/-18V DC @300mA

Audio Outputs
Powered Accessory Sockets

Stereo RCA


MM: >75dB


MM: <0.005% ref 50mV input
MC (low & high gain): <0.005% ref 1.5mV inpu

Signal-to-Noise Ratio

MM: 83dB réf. 5 mV A-wtd
MC (low & high gain): 84dB ref 0.5mV A-wtd (both gain settings)


MM: 42dB
MC (low & high gain): 61dB low gain and 67dB high gain (switchable)

Phono Specific
RIAA Accuracy

MM: +/-0.1dB


7.5lbs (3.4kg)

Dimensions (HxWxD)

23/4x 83/8x 121/2" (7x21.4x31.7cm) 

Amplifier Output

1 x Stereo RCA 
1 x 5 pin DIN
1 x 8 pin DIN

Power Output

MM: 47kΩ and 100pF

MC (low & high gain):

16 selectable resistive values:
1 000 Ω, 600 Ω, 430 Ω, 330 Ω, 250 Ω,
215 Ω, 185 Ω,165 Ω,150 Ω, 140 Ω, 125 Ω,
115 Ω, 105 Ω, 100 Ω, 90 Ω, 85 Ω

16 selectable capacitive values:
100 pF, 400 pF, 700 pF, 1000 pF,
1300 pF, 1600 pF, 1900 pF, 2200 pF,
2500 pF, 2700 pF, 3100 pF, 3400 pF,
3700 pF, 4000 pF, 4300 pF, 4600 pF

Power Supply

Type 1


Naim NPX TT power supply
Naim NPX TT power supply Sale price£2,699.00