Solo Tone

25 Or 6 To 4 (Single) [Remastered]

Chicago

Guitarrock1970s

Original Gear

GuitarFender Telecaster with humbucker in neck (Terry Kath's heavily modified Telecaster)

AmpAcoustic Control Corporation 260 (solid-state head) into Acoustic 261 or 262 4x12 cabinet

PickupsNeck position: Gibson humbucker (PAF-style), Bridge: stock Tele single-coil

Amp Settings

gain6

bass6

mid7

treble7

reverb1.5

presence6

Effects & Signal Chain

wahUnknown Wah pedal (model unknown, likely Vox or Cry Baby)

Notes

Studio recording, 1969-1970. Guitar is Terry Kath's iconic Telecaster with a Gibson neck humbucker and reversed control plate. Amp is confirmed from period photos and live footage. No evidence of fuzz pedal; overdrive is from amp and possible cocked wah. Wah pedal is clearly audible in the solo. No evidence of delay, chorus, or other modulation. No studio reverb is part of the guitar signal chain.

Tone Character(10)

fat and vocal-like midrangesinging sustaincocked wah resonanceslightly compressedaggressive attacknot overly brightbassy but not muddysmooth overdriveclassic late 60s/early 70s rock solo soundwah sweep is clearly audible

Difficulty

The solo requires fast, accurate pentatonic licks, expressive use of the wah pedal for vocal effects, and strong dynamic control, making it challenging for most intermediate players.

Sources

Terry Kath | Equipboard Forgotten Heroes: Terry Kath Wondering how to get '25 or 6 to 4' solo tone. : r/Guitar

This tone has been researched 2 times by the community

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