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Sugden Audio Masterclass IA-4 Integrated Amplifier


This product can only be purchased in store. Please contact us for more details.

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Sugden Audio Masterclass IA-4 Integrated Amplifier

IA-4 is Sugden’s flagship and most popular integrated amplifier. Weighing a substantial 20 kilos the IA-4 has a purposeful look and impressive build quality. Plenty of input and output facilities are on offer including a high quality phono stage. The class A power output circuit has been upgraded from the A21 series with a larger power supply and improved soothing and output capacitors. Gold plated circuit boards, full relay switching and a precision input selector switch offer further detailing. The pre-amplifier section of the IA-4 is a bespoke design, with surprising clarity and detail. The most noticeable feature is the ability to create a large performance with depth and height on any type of music.

Additional information

Technical Specifications

Inputs ​ Three line level, tape, MM phono, balanced

Outputs Variable pre-out, fixed out, loudspeaker out

Volume Control Remote control RC5 compatible

Tape Monitor and record off


Line Input sensitivity 125mV

Phono Input Sensitivity 2mV (MM)

Power Output 33 Watts per channel

Frequency Response +/-1dB 14Hz-200kHz

Bandwidth 6Hz-300kHz

Signal to Noise >84dB

Gross Weight (packed) 20kgs

Dimensions 165 x 430 x 440mm (hwd)


Graphite, Silver

Ceritech Audio