The Blues Jr is among the worlds most popular tube amp, this one has an upgraded Celestion G12M-65 Creamback 12'' Speaker in it!! In addition, the amp also has the fundamental "BillM" modifications. The amp sounds great with, and without, guitar pedals. It's a 15 watt beast!! From L&M; Fender The Blues Junior III is a 15-watt warm-toned, longtime favorite - the perfect grab-and-go tube amp for stage and studio. It is known for the fat mid tones characteristic of EL-84 output tubes, warm 12AX7 preamp tube overdrive, real spring reverb, simple control layout, footswitchable FAT boost and external speaker capability. Features: Black control panel with front-reading text New badge Vintage Fender dog bone handle Vintage-size jewel light Sparkle circuit mod Rattle-reducing shock absorbers for the EL84 tubes Highly sensitive Fender Special Design 12 lightning bolt speaker by Eminence Heavy-duty set-screw chicken head knobs. Electronics Voltage: 120V Wattage: 15 Watts Inputs: One Extension Speaker Jack: External Speaker Jack Channels: One Channel Rectifier: Solid State Rectifier Controls: Reverb, Master, Middle, Bass, Treble, "Fat" Switch, Volume Hardware Hardware Finish: Chrome Pilot Light Jewel: Red Amp Jewel Handle: "Dog Bone" Handle Front Panel: Black Front Panel Grill Cover Cloth: Black Textured Vinyl Covering with Blackface Style Black/Silver Grille Cloth Input Impedance: 1 M Input Impedance Output Impedance: 8 Ohm Amplifier Length: 9.18" (23.31 cm) Amplifier Width: 18" (45.72 cm) Amplifier Height: 16" (40.6 cm) Amplifier Weight: 31 lbs. (14.06 kg) Effects: Spring Reverb Speakers Celestion G12M-65 Creamback 12'' Speaker 8 Ohm Tubes Pre Amp Tubes: 3 x 12AX7 Power Tubes: 2 x EL84