Great amp - but I don't recommend it for acoustic guitars as much as for jazz guitars. Beautiful, round sound! Top condition! Send and return for effects. Bass, middle (filtered) and subtle treble controls. Volume. Master volume. 2 inputs. Switch: Standby switch and mains on/off. Valve Complement: 2 x ECC83, 1 x ECC81, 2 x 6L6 Output: 50 watts Speaker: Celestion Truvox 12 inch Weight: 19.5 Kg 42.9 lbs Size: Height: 20?, 51 cm Width: 19?, 48.5 cm Depth: 9?, 23 cm