Sugden Masterclass IA-4 Integrated amplifier

Sugden Masterclass IA-4 Integrated amplifier

What we Say:

The Sugden Masterclass IA-4 is the flagship integrated from Sugden. It features balanced, single ended and MM phono inputs. It features an upgraded power stage which delivers 33WPC in pure Class A. A superb sounding and beautifully built amplifier that will last generations. Handmade in Heckmondwike only 18 miles from us.

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What they say:

Masterclass IA-4 Integrated Amplifier

The IA-4 is our 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.


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)


J E Sugden & Co Ltd, Heckmondwike, West Yorkshire.

The manufacturer reserves the right to change specifications without notice.