2
1. Power and Standby
Due to the nature of vacuum tubes, we suggest to power up the
YBA amp in Standby mode for a few minutes prior to use. This will
allow the tubes to warm up. The pilot light glows red when the am-
plifier is engaged; it glows amber when in Standby mode.
Note: Before powering up and disengaging the Standby switch
make sure speaker cabinets are connected to the output jacks.
When the amplifier is warmed up, disengage the Standby
switch and get ready to experience the classic tone of a Traynor
Bassmaster all-tube amplifier.
Note: It’s recommended to leave the amplifier powered up during set breaks, the Standby switch cuts all
output from the power amplifier.
2. 0dB / Passive and -6dB / Active Inputs
The YBA is equipped with two input jacks. The 0dB/Passive input feeds the first tube input-stage directly while
the -6dB/Active input applies a pad to it. The -6dB input is usually used for bass guitars that have active pick-
ups or ones with extremely hot levels.
3. Deep Switch
The YBA is equipped with a Deep switch to help accentuate deep bass and treble frequencies.
4. Bright Switch
The Bright switch provides a small amount of treble boost for added presence. The effect is more pronounced
at lower gain settings.
5. Resonance Switch
The Resonance switch is placed in the output stage of the power amplifier and controls the amount of low frequency damping.
Pushing in the switch reduces the damping factor and allows the resonance of the speaker cabinet to be more pronounced.
Tip: Having the switch out will increase the damping factor and produce a tighter sound.
6. Gain Control
The Gain control is placed immediately after the first tube-stage and is used in conjunction with the Master volume
control to help achieve the proper sound and feel. This control also allows the capability of giving a warm more satu-
rated tube sound when turned up (even at low volume levels).
7. 3-Band EQ and Mid Frequency
The YBA features vintage passive Bass and Treble controls. Additionally, the tone controls are equipped with a
Frequency adjustable Mid control.
Resonance
Bright
Deep
Inputs
Passive
Active
0
-6
Standby
Power
On
Off
Gain
0
5
10
0
5
10
0
5
10
0
5
10
200
1.0K
3.0K
Master
0
5
10
Bass
Mid
Treble
Frequency
Hz
