Blue Book of Guitar Values Logo - Icon
shopping_cart menu
Menu
Guitar Values Books Pricing FAQs Contact Us
Login

/

Get Started

ELECTRIC SS AMPS: SECOND SERIES PORTAFLEX MODELS (1968-1969)

In 1968, Ampeg introduced their second series of solid-state amps and like the first series, all of these used Portaflex cabinet designs. The second series featured amplifiers that were much larger, especially the three ST models. All models in this series were very short lived and few of them exist today. However, the BT-140, ST-22L Gladiator, ST-25L Olympian, and ST-42L Colossus all moved on to Ampeg's unofficial third series in 1969. Since the Portaflex cabinet design was primarily used to allow the tubes to dissipate heat, it was not needed in solid-state design and Ampeg pretty much abandoned use of the Portaflex cabinet with solid-state amplifiers after 1968.

Models (5)

BT-140 FIRST VERSION

View Details
- 100W, 2-15 in. JBL D-140F speakers in a column style cabinet, piggyback-style bass amp with separate head and cabinet, solid-state chassis, two channels, front silver electroluminescent control panel, four inputs (two per channel), six knobs (Ch. 1: v, t, b, Ch. 2: v, t, b), hi and lo switches for each channel, black covering, blue/gray grille, mfg. 1968-69.
The BT-140 was essentially a GT-15C but made for bassists.
Dummy Table

Unlock full access to Blue Book

You are currently viewing the free portion of the Blue Book of Guitar Values. To unlock full access, choose a subscription for more benefits including access to all guitar values, pricing history, create a collection and more!

Choose a Plan

GT-15C

View Details
- 100W, 2-15 in. Altec speakers in a column style cabinet, combo/piggyback Portaflex guitar amp, solid-state chassis, two channels, front silver electroluminescent control panel, four inputs (two per channel), six knobs (Ch. 1: v, t, b, Ch. 2: v, t, b), hi and lo switches for each channel, black covering, blue/gray grille, mfg. 1967-68.
Dummy Table

Unlock full access to Blue Book

You are currently viewing the free portion of the Blue Book of Guitar Values. To unlock full access, choose a subscription for more benefits including access to all guitar values, pricing history, create a collection and more!

Choose a Plan

ST-22L GLADIATOR

View Details
- 120W, 2-12 in. Altec 417A speakers in a column-style cabinet, combo/piggyback Portaflex design, solid-state chassis, two channels, tremolo, vibrato, reverb, front bottom silver electroluminescent control panel, four inputs (two per channel), nine black and silver knobs (Ch. 1: v, t, b, s, i, r, Ch. 2: v, t, b), polarity switch, power switch, dark blue covering, blue/gray grille, mfg. 1967-68.
Dummy Table

Unlock full access to Blue Book

You are currently viewing the free portion of the Blue Book of Guitar Values. To unlock full access, choose a subscription for more benefits including access to all guitar values, pricing history, create a collection and more!

Choose a Plan

ST-25L OLYMPIAN

View Details
- 120W, 2-12 in. Altec 418A speakers in a column-style cabinet, combo/piggyback Portaflex design, solid-state chassis, two channels, tremolo, vibrato, reverb, front bottom silver electroluminescent control panel, four inputs (two per channel), nine black and silver knobs (Ch. 1: v, t, b, s, i, r, Ch. 2: v, t, b), polarity switch, power switch, dark blue covering, blue/gray grille, mfg. 1967-68.
Dummy Table

Unlock full access to Blue Book

You are currently viewing the free portion of the Blue Book of Guitar Values. To unlock full access, choose a subscription for more benefits including access to all guitar values, pricing history, create a collection and more!

Choose a Plan

ST-42L COLOSSUS

View Details
- 120W, 4-12 in. Altec 417A speakers, combo/piggyback Portaflex design, solid-state chassis, two channels, tremolo, vibrato, reverb, front bottom silver electroluminescent control panel, four inputs (two per channel), nine black and silver knobs (Ch. 1: v, t, b, s, i, r, Ch. 2: v, t, b), polarity switch, power switch, dark blue covering, blue/gray grille, mfg. 1967-68.
Dummy Table

Unlock full access to Blue Book

You are currently viewing the free portion of the Blue Book of Guitar Values. To unlock full access, choose a subscription for more benefits including access to all guitar values, pricing history, create a collection and more!

Choose a Plan