High Quality Audio Equipment

Sugden Masterclass PA-4

  • £2420.00
Select Finish (required)
  • Product Code: SAPA-4

Sugden Masterclass PA-4 Phono Amplifier

The full potential of the musical magic contained on vinyl discs can only be realised by the passionate treatment of the low level signals emanating from the disc and stylus. Class A circuitry is renowned for its recovery of and synergy with, low level signals and Sugdens is synonymous with Class A circuitry. This combination is fully exploited in the, PA-4, dual mono, two stage, Class A Phono amplifier. The two stages are the moving coil pre-amplifier and the moving magnet, RIAA-correction amplifier.

The moving coil stage is a Class A current feedback circuit and the moving magnet amplifier a Class A voltage feedback circuit incorporating the RIAA correction in the negative feedback loop. DC servo circuits enable direct coupling of the musical signal from moving coil input to final output. The power supply which Sugdens considers an integral part of the amplifier circuitry is a ‘current shunt’ design with a specially designed voltage regulator to prevent rising impedance with higher frequencies.

Constructed with components of exceptional quality, hand assembled on long term stability gold plated circuit boards, the resultant performance is a phono stage of absolute transparency and natural sound.

The user interfaces are all externally selected i.e. input selection 1x MM, 2x MC, the latter with external loading facilities. There are two stereo outputs for recording or line amplifier.


This product is available to order only and delivery is approximately 4 weeks. Payment can be made in full at time of order by selecting Add to Basket and Buy alternatively contact us and we can take a deposit with the balance due 7 days before despatch.

Masterclass PA-4 Phono Amplifier


Inputs: Two moving coil, moving magnet

Outputs: Two line level

Loading: MC1 and MC2

Front Panel Controls: Input Indicator


Input sensitivity: Moving Magnet 3.5mV, Moving Coil 0.15mV

Output: 360 mV

Loading: Moving coil 470 & 100 Ohms

Frequency response: +/-0.3dB 30Hz-30kHz

Signal to noise: -70dB

Nett weight: 6 kgs

Dimensions (inc): 110mm x 430mm x 330mm (h x w x d)

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