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The SPA-4 is a stereo version of the MPA-4 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 SPA-4 could be the solution. One of the noticeable abilities of the 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 SPA-4 making it a fine power amplifier.
About the Masterclass Series
The award winning Masterclass series has been in continuous production for over seventeen years. During this time the family has grown and benefited from significant improvements and upgrades. Recent arrivals include an entry level power amplifier, digital converter and headphone pre-amplifier. Like all Sugden products each Masterclass is handmade at our factory in Yorkshire, England by a single highly skilled technician with many years experience.
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SPA-4 Stereo Power Amplifier
Inputs: Stereo line level, stereo balanced
Outputs: Stereo pair multi-way locking binding posts
Input Sensitivity: 1Volt 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 (packed): 25kgs
Dimensions: 250 x 430 x 350mm (hwd)
MPA-4 Mono Balanced Power Amplifier
Inputs: Mono balanced
Outputs: Single pair multi-way locking binding posts
Input Sensitivity: 1Volt for full output
Power output: 165 Watts into 8 Ohms both channels working
Frequency response: +/-0dB 15Hz-30kHz
Bandwidth: -3dB points 2Hz-200kHz
Signal to noise: >85dB
Gross weight (packed): 25kgs x 2
Dimensions: 250 x 430 x 360mm (hwd)
The manufacturer reserves the right to change specifications without notice.
