The Next Chapter

Designed in collaboration with Robert Keeley of Keeley Electronics as a follow-up to the bestselling Custom 10, the Keeley Custom 12 is built to seamlessly integrate your pedals into the heart of an all-tube Supro amplifier. The preamp and 2-band EQ section are voiced perfectly for running your gain pedals in front of the amp, while still maintaining Supro’s signature midrange heft and phenomenal touch dynamics. And a transparent effects loop provides the ideal point to inject your delay and reverb effects into the amplifier’s all-tube signal path, avoiding unwanted distortion on modulation effects. The Keeley Custom 12 features the legendary Celestion G12M-65 Creamback speaker, developed in the mid-1960s and beloved by the biggest guitar players in history. It produces a vintage, woody tone while still offering major power, perfect for modern amps. Low-end heft complements warm and vocal mid-range, with crunchy upper-mids and sweet, articulate highs. A master volume circuit allows you to control the sound pressure level coming from the speaker while pouring on copious amounts of gain from the ECC83S-based tube preamp or your favorite dirt pedals.

Features:

Celestion Creamback Speaker
The Keeley 12 features the legendary Celestion G12M-65 Creamback speaker, known for its vintage, woody tone while providing substantial power. It offers a rich low-end, warm and vocal mid-range, crunchy upper-mids, and sweet, articulate highs.

Perfect Pedal Platform
Designed for pedal enthusiasts, the Keeley 12 includes a transparent effects loop, allowing modulation effects to be injected directly into the all-tube signal path. This setup avoids unwanted distortion and delivers clear, sweet effect-pedal tone.

Class A Premium Tone
The amp uses an ECC83S-based tube preamp for gain, paired with a Bruce Zinky-designed cathode-biased Class A power section and premium EHX 6V6GT tubes, achieving the distinct Supro sound.

Premium Look and Feel
The Keeley 12 boasts Custom Blue Rhino Hide tolex, Supro Silver/Blue grill cloth, white piping, a vinyl dog bone handle, and an engraved headplate co-branded with Supro and Keeley Electronics identities.

Specifications:

Model

• Name: Keeley 12.
• SKU: 1968RK.

Electronics

• Wattage: 25W.
• Speaker Brand: Celestion.
• Speaker Model: G12M-65.
• Knob Controls: Volume, Treble, Bass, Master.
• Effects: Effects Loop.
• Inputs: 1.
• Remote Switch Jacks: N/A.
• Outputs (line level): Send.
• Speaker Jack: 1x 8-ohm, 2x 4-ohm.
• Preamp Tubes: 2x ECC83S.
• Power Amp Tubes: 2x 6V6GT.

Hardware

• Cabinet Material: Poplar.
• Handle: Vinyl Dog Bone.
• Remote: N/A.
• Cover: N/A.
• Tolex: Blue Rhino Hide.
• Piping: White.
• Colorway: Blue Rhino Hide.
• Grill Cloth: Supro Silver/Blue.

Body

• Cabinet Dimensions (in.): 23.625” x 16” x 10.5”.
• Cabinet Dimensions (cm): 60 x 41 x 27 cm.
• Weight (lbs): 42 lbs.
• Weight (kg): 19 kg.