Sugden Masterclass IA-4 Amplifier

Sugden IA-4 Integrated Amplifier

The Sugden IA-4 Integrated Amplifier is available for demonstration in our Hull store by request.

Read the Sugden Masterclass IA-4 Pure Class A Amplifier Review - Editor's Choice

The Sugden IA-4 Integrated Amplifier represents the pinnacle of Sugden's pure Class A amplification technology. As the flagship integrated amplifier in their Masterclass series, the IA-4 combines the finesse of a high-end preamplifier with the authority of a powerful Class A output stage. With meticulous attention to detail and a commitment to audio purity, the IA-4 delivers an exceptionally musical and engaging listening experience.

The preamplifier section is derived from Sugden's renowned Masterclass LA-4 preamplifier, ensuring transparency and control over your music. The integrated phono stage accommodates MM cartridges, allowing vinyl enthusiasts to enjoy their record collections with exceptional clarity and warmth.

Driven by a robust Class A output stage, the IA-4 delivers 33 Watts per channel into 8 Ohms, providing ample power to drive a wide range of loudspeakers with ease. The pure Class A operation ensures a smooth, natural sound with outstanding detail and dynamics.

Handcrafted in England, the IA-4 features high-quality components and a solid construction that reflects Sugden's dedication to excellence. 

A Legacy of Excellence

Founded in 1967, Sugden Audio has been at the forefront of high-fidelity innovation. Pioneering the commercial use of Class A transistor amplifiers, Sugden revolutionised the audio industry by eliminating crossover distortion found in Class B designs. This legacy of pure and uncoloured sound reproduction is epitomised in the IA-4, a testament to decades of engineering expertise.

Performance Highlights

The Sugden IA-4 excels in delivering a highly detailed and emotionally engaging audio experience. Its Class A design allows for exceptional micro-dynamics, a realistic three-dimensional soundstage, and rich tonal accuracy. The robust design ensures consistent performance across various musical genres, making it a perfect choice for discerning audiophiles.

Optimised for Analogue Purists

With a focus on analogue audio, the IA-4 includes a moving magnet and moving coil phono stage, catering to vinyl enthusiasts. Its minimalistic yet functional design omits digital inputs to ensure pure signal integrity. The unit’s ALPS potentiometer provides precise volume control, complemented by a remote for added convenience.

Part Exchange Available

As you would expect from Fanthorpes hifi, we offer a generous part exchange against the Sugden IA-4 Integrated Amplifier. If you have any hifi that you wish to use as part payment, then either call us on 01482 223096 or email us at shop@fanthorpes.co.uk, and we will give you a price to change. This is a fantastic and hassle-free way of making the Sugden IA-4 more affordable.

Finance Available

Fanthorpes hifi can also offer buy now pay later on the Sugden IA-4 Integrated Amplifier, allowing you to spread or defer your payments over a year. If you are interested in taking advantage of our payment terms, email shop@fanthorpes.co.uk or call us on 01482 223096, and we will email an application form to you.

Sugden Home Demonstration Available

Want to hear what the Sugden IA-4 will add to your system? Please email us on at shop@fanthorpes.co.uk or call us on 01482 223096 and we will discuss how and if this can happen. We are known for travelling all over the country to demonstrate and install hifi equipment.

Sugden IA-4 Integrated Amplifier Specifications

• Power Output: 33 Watts per channel into 8 Ohms
• Frequency Response: +/-1dB 14Hz - 200kHz
• Total Harmonic Distortion: Typically less than 0.02% at rated output 20Hz - 20kHz
• Inputs: 5 x Line Level, 1 x Phono MM
• Phono Sensitivity: MM 2mV
• Input Impedance: 50k Ohms
• Outputs: Pre-Out, Record Out, Headphone Out
• Input Sensitivity: Line 125mV for full output
• Signal to Noise Ratio: Line >85dB
• Power Consumption: 160 Watts
• Dimensions (H x W x D): 165 x 430 x 440mm
• Net Weight: 20kg