Guild Quantum Amplifier
Delivers that hard-driving, up-front, "Motown"-type sound - without going through the engineers control board
 | | 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.
| Model | Quantum X | Quantum Bass Deluxe | Quantum Bass Standard |
| Available | 1967 | 1969 | 1969 |
| Power Output | 200W (100W RMS) |
| Tubes | 3-12AX7/7025, 1-7247, 2-8417 |
| Speakers | 2 15" J.B. Lansing D 130F | 2 15" J.B. Lansing D 140F | 2 15" heavy duty |
| Channels | 2 channels (4 inputs) |
| Controls | Volume, bass, treble controls and 3-position tone switch for each channel. Master volume and standby. |
| Dimensions | head: 10½" high, 21½" wide, 11½"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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