Gibson Melody Maker, Harmony H22 bass, Vox Ultrasonic
1969 Gibson Melody Maker guitarHarmony H22 bassVox Ultrasonic guitar, with built-in effects
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Guild Quantum

Electric bass amplifier

Guild Quantum Amplifier | Guild Quantum Advertisements

Guild Quantum Amplifier

Delivers that hard-driving, up-front, "Motown"-type sound - without going through the engineers control board

Guild Quantum X amplifier
The Guild Quantum X bass amplifier

Initially there was just one version of the Quantum amplifier, with two more models being added to the range in 1969. Each used the same amplifier (head), but with differing quality speaker cones within the cabinet. All were suitable for the bass guitar and organ, with the Quantum X also suitable for electric guitar.

This amplifier was heavily promoted at the time; see the vintage Guild Quantum amp advertisements.

ModelQuantum XQuantum Bass DeluxeQuantum Bass Standard
Available196719691969
Power Output200W (100W RMS)
Tubes3-12AX7/7025, 1-7247, 2-8417
Speakers2 15" J.B. Lansing D 130F2 15" J.B. Lansing D 140F2 15" heavy duty
Channels2 channels (4 inputs)
ControlsVolume, bass, treble controls and 3-position tone switch for each channel. Master volume and standby.
Dimensionshead: 10 1/2" high, 21 1/2" wide, 11 1/2"deep
cabinet: 45" high, 30" wide, 11 7/8"deep
1969 Price$895$925$675

In comparison, the May 1969 Fender price list has a Fender Bassman amplifier with 2 15" J.B. Lansing D 140F speakers listed at $699.50, and another with 2 15" 'heavy duty' speakers at $539.50

This amplifier was endorsed by numerous acts, including The Blues Project, Blood Sweat and Tears, and Buddy Guy; all of whom appeared in the related advertising for this amplifier.

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