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Peak HiFi is a well established business and was formed in 2004 as audio consultants specialising in high quality audio equipment, with a particular fondness for stereo and analogue equipment, we are particularly enthusiastic for classic turntables such as the Garrard 301 and the Garrard 401. Peak HiFi offers a select range of new and approved used equipment, accessories and services. Reconditioned Garrard 301 and 401 units are available as well as beautifully engineered plinths for these decks. We welcome you to visit us at our premises on the North Eastern edges of the Peak District and take advantage of our relaxed surroundings and two demonstration rooms where we can demonstrate all of the equipment and assist you with your selection. Please call us to fix an appointment.

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Home > Products > Amplifiers > Sugden Audio > Sugden Masterclass IA-4

Sugden Masterclass IA-4

Sugden Masterclass IA-4
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Sugden Masterclass IA-4 Integrated Amplifier

The largest and most powerful integrated amplifier in the Sugden family which takes advantage of the initial Sugden class A output configuration. The Pure Class A solid state output stage equipped with greater power from a custom-built transformer and low impedance supply can project and fill an enormous holographic sound stage with ‘simply more music’.

An extraordinary, organic, euphonic, acoustic performance, achieved by the integration of a state of the art preamplifier and the classic Sugden Class A output stage. The integrated system of pre-amp and power amp driven by individual power supplies enables the ultimate in musical performance. Just listen - you will find it worth more than a thousand words. Despite the high power installed, Sugden have included an MM phono stage of extremely high quality.


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 IA-4 Stereo Integrated Amplifier


Inputs: Three line level, tape, MM Phono, balanced

Outputs: Variable pre-out, fixed out, loudspeaker out


Line Input sensitivity: 125mV

Moving Magnet Input Sensitivity: 2mV

Power output: 33 Watts per channel

Frequency response: +/-1dB 14Hz-200kHz

Bandwidth: -3dB points 6Hz-300kHz

Signal to noise: >84dB

Nett weight: 20 kgs

Dimensions: 165mm x 430mm x 440mm (h x w x d)

Product Code: SAIA-4

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Sugden Masterclass IA-4

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