The Sugden Audio Masterclass IA-4 integrated amplifier is Sugden’s flagship and most popular integrated amplifier. Weighing a substantial 20 kilos the Sugden 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 Sugden 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 Sugden 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.

Technical Specifications 

Inputs – Three line level, tape, MM phono, balanced
Outputs – Variable pre-out, fixed out, loudspeaker out
Remote Control – Remote control (RC5 handset included)​​
Recording – Monitor and record off
Line Input Sensitivity – 125mV
Phono Input Sensitivity – 2mV (mm)
Power Output – 33 Watts per channel into 8 Ohms
Frequency Response – +/-1dB 14Hz-200kHz
Bandwidth – 6Hz- 300kHz
Signal to Noise – >84dB
Gross Weight – 20kg
Dimensions W x H x D (mm) – 430 x 165 x 440
Finish Options –
Graphite and Titanium £6,670
Gunmetal Blue, Grey, Bronze, Copper, Orange, Green 3, Green 2, Apple Green, Blue 3, Blue 2, Turquoise, Violet and Red £6,840