A Signature sorozat kisebbik darabja, 6 db 6550C vagy KT88 cső dolgozik benne. A csövek beállítását egy áramkör végzi, így állandó optimális beállítás mellett működik az erősítő. Triódára átkapcsolva 110W.
| Vacuum Tube Complement | 8 x EL34 or 6CA7, 1 x 12AT7, 1 x 12BH7 |
| Output power 20Hz – 20kHz <3% THD |
Tetrode: 225 Watts, Triode: 140 Watts Into 5Ω |
| Input sensitivity | Variable between 1-2V, depending upon DF setting |
| Input impedance | 45kΩ |
| Load setting | 5Ω |
| Output load range | 4Ω – 8Ω |
| S/N ratio | 225W Tetrode & 140W Triode: -90dB, 120Hz |
| Power consumption | Idle = 270W, Full power = 550W |
| Primary mains fuse rating | 100/120V = 12A Ceramic Slo Blo, 220/240V = 6A Ceramic Slo Blo |
| Input fuse | 100/120V = 1A Ceramic Slo Blo, 220/240V = 1A Ceramic Slo Blo |
| Logic fuse | 100/120V = 1A Ceramic Slo Blo, 220/240V = 1A Ceramic Slo Blo |
| B+ fuse rating | Plate Fuse – 1.5A fast acting 600V, Screen Fuse – 0.75A fast acting 600V |
| Dimensions W x D x H | 18.5 x 18 x 9 inches (47 x 45.7 x 23 cm) |
| Weight | 85lbs (38.5kg) per monoblock unpacked, 100lbs (45.4kg) packed |