Pure Class A and Single Ended for the ultimate in lush musicality, but are surprisingly dynamic when playing large orchestral pieces.  The Bass Drum in a dynamic performance is wonderful.  The impact on the drum, the vibration of the skin and the echo from the back of the room are what music is all about. These are great amplifiers and a perfect ultra musical amplifier for the discerning listener. They have power, authority and bass control out of all proportion to the relatively modest rated 28watts per channel. 
They are not designed for inefficient speakers or people who want to play heavy rock, or big drums at a high level, but they have a delicacy, transparency and natural musicality found in few amplifiers. Vocals are smooth and rich, amongst a huge, open soundstage. These are a top seller, and no wonder.

Specification:

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Power Output: 28 watt, RMS 1kHz

Total harmonic distortion: less than 1% (15watt, 1kHz)

Frequency response: (-3dB points at 15 watt) 5Hz - 47kHz

Input sensitivity: 0.7V

Input impedance: 100k ohms

Output: 4, 8 ohms. User selectable

Signal/Noise: 90db

Consumption: 190 watt x 2

Input Interfaces: 1 group (RCA)

Vacuum tube: 2 ea - E88CC Input. 2ea - 5687 Driver.  4ea - 5AR4 Rectifier. 2 ea - 845 Output tubes

Warm-Up Time: 3 Minutes

Dimensions: 390 x 190 x 500mm (HxWxD)

Weight: 35kg x 2 (packed)