Vintage 1978 Gallien-Krueger 112EC Extension Cabinet w/ Original Rola Celestion G12-80 (T3056, Kurt Mueller 1777 cone) – All-Original Matching Setup, SN 8805

Up for sale is a rare, investment-grade vintage guitar piece: an all-original, factory-matching Gallien-Krueger 112EC 1x12 Extension Cabinet loaded with its birth-era Rola Celestion G12-80 speaker.This is not a pieced-together rig. The low 4-digit serial number on the cabinet (8805) perfectly correlates with the late-70s production run from Campbell, California, and the speaker carries the original factory Gallien-Krueger sticker. This exact extension cab model was famously paired with legendary GK lunchbox and combo amps of the era (like the 250ML) to create a massive full-stack sound.

Speaker Technical Details:

• Model: Rola Celestion G12-80 (Pre-Classic Lead 80)
• Specification Code (T-Number): T3056 (15 Ohms / 16 Ohms standard)
• Date Code: JL28 (October 28, 1978) – Made in Ipswich, Suffolk, England
• Cone: Original Kurt Mueller 1777 stamped cone (75Hz). No recone, no repairs.

Condition Report:

• Speaker: In absolutely stunning cosmetic and structural condition. The celulose cone is stiff and dark with sharp, clean ribs. The dust cap is perfectly round and untouched. The cork gasket is fully intact and complete.
• Cabinet: The black tolex is in great shape with minor vintage wear appropriate for its age. Original metal corners, sturdy strap handle, and the classic silver GK plastic logo badge on the grill cloth are fully intact. The original aluminum backplate features the stamped serial number and a solid input jack.
• Sound & Tone:The 1978 G12-80 is highly sought after by tone purists for its massive headroom, tight low-end, and smooth high frequencies. It provides a warm, thick tone without the harsh upper-mid spike found in modern equivalents, making it perfect for both high-gain Marshall-style crunch and pristine cleans.Worldwide shipping available. The cabinet will be packed with professional care (extra padding over the speaker face) to ensure safe transit. Please contact me for an exact shipping quote to your location or if you have any questions!