The popularity of the Masterclass series has resulted in over seventeen years of continuous production. Offering an excellent price/performance ratio it is easy to see why it remains so successful. The Sugden Audio Masterclass SPA-4 stereo power amplifier is a stereo version of the Sugden MPA-4 mono power amplifier and uses the same class A circuit. The only differences are power output and the additional flexibility of both single ended and balanced inputs. Not every music lover can accommodate two substantial power amplifiers in their listen space, so a single Sugden SPA-4 could be the solution. One of the noticeable abilities of the Sugden SPA-4 is how well it works with smaller loudspeaker designs as well as large ones. Control and soundstage are two key elements of the Sugden SPA-4 making it a fine power amplifier.

Technical Specifications 

Inputs – Stereo line level, stereo balanced
Outputs – Stereo pair multi-way locking binding posts
Input Sensitivity – 1 Volt for full output
Power Output – 75 Watts into 4 Ohms both channels working
Frequency Response – +/-0db 15Hz-30kHz
Bandwidth – -3dB points 2Hz-200kHz
Signal to Noise – >85dB
Gross Weight – 25kg
Dimensions W x H x D (mm) – 250 x 165 x 350
Finish Options –
Graphite and Titanium £6,570
Gunmetal Blue, Grey, Bronze, Copper, Orange, Green 3, Green 2, Apple Green, Blue 3, Blue 2, Turquoise, Violet and Red £6,740