Guild ThunderBass I Operating Instructions Manual

Operating Instuctions—ThunderBass,
Quantum Bass, and Quantum X Amplifiers
INTRODUCTION
The ThunderBass I, ThunderBass I-A and Quantum X are designed for bass, guitar,
and organ.
The Quantum Basses are for use with electric bass ans organ only. The ThunderBasses
have 100 watt amplifier sections and the Quantum series all have 200 watt amplifiers.
The channel functions and controls are the same for both. The only difference in the
amplifier sections is the power rating.
PREVENTING OF SPEAKER DAMAGE
1. When plugging your instrument in or out of the amplifier input , always place the
Standby Switch (indicated by SBY) in "SBY" position, which is the "off "
position.
2. Use caution when raising the volume level to maximum output. When used with
electric bass, the Guild ThunderBass and Quantum Bass amplifiers are capable
of producing more power than the speakers can handle.
USE OF VOLUME CONTROLS
These amplifiers have sufficient gain to cause overloading with an average guitar when
the volume Controls are adjusted to maximum output. Once an amplifier reaches the
overload point, very little additional volume is produced, but the distortion level
increases exponentially.
Unless distortion is desired for some particular reasons, there is no justfication for
turning the volume Control beyond the setting which produces the maximum clean
output that the amplifier is capable of producing. The most favorable signal-to-noise
ratio (the least amount of hiss) is attained when the volume Control of the individual
channel is set at maximum level—clockwise—and the master Volume Control is at a
minimum setting.
Note:
The Master Volume Control overrides the Volume Control of the individual
channel. Whatever the individual Volume Control settings, the Master Volume
Control raises the level of both channels simultaneously.
INPUTS: NORMAL AND HIGH GAIN
No.1 input is the high gain input. Unless overloading is experienced, use the No.1 input.
No.2 input would be used with guitars having pickups of unusually high output.
PROPER USE OF TONE CONTROLS AND TONE SWITCH
1. With Tone Controls centered and the Tone Switch in the top position, the
frequency response is flat. This is preferred position for microfone reproduction
and accordion amplification.
2. As the Tone Switch is moved from top to bottom position, the treble gain
increases significantly.
3. Experimantation with the various Tone Controls will provide the player with a
wide range of sound and tone.