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operate into any 4 ohm, 8 ohm or 16 ohm cabinets(s).
NOTE: Always set the switch to match the impedance of your
cabinet(s).
35. LOUDSPEAKER OUTPUTS: Connects the AT-100 to the
speaker cabinets such as the AT-412A or AT-412B.
NOTE: Always be sure the speakers are plugged in before attempting to
operate the amplifier. Always use a high quality, heavy duty, unshielded
speaker cable. Severe damage can occur from failing to connect the speakers
and properly setting the impedance selector switch.
36. GROUND / LIFT SWITCH: Removes ground from the circuit
to eliminate 60-cycle hum.
37. 3-SETTING RECTIFIER SWITCH:
SOLID-STATE – Gives tightest low-end definition and fastest
attack.
TUBE AB1 – Punchy, warm and tighter definition than Tube A.
TUBE A – “Vintage” attack and feel. Warmest sounding setting.
38. POWER TUBE FUSE: Power tubes failure fuse
39. AC INLET & PRIMARY FUSE: Connects AC powercord and
houses primary fuse.
Always use correct value as indicated on amp panel chart.
11. CLEAN CHANNEL - BASS: Adjusts the amount of low
frequency boost or cut as desired. Adding bass will increase the
depth and fullness of your sound.
12. CHANNEL SELECT: Push switch selects between the clean
and overdrive channels. Activated LED lights indicate which
channel is in use.
13. OVERDRIVE – VOLUME 2: Controls the overall volume of the
high gain overdrive channel.
14. OVERDRIVE – VOLUME 1: Controls the overall volume of the
medium gain overdrive channel.
15. OVERDRIVE CHANNEL – GAIN SWITCH 2: Activates the
CONTOUR control for Gain 2.
16. OVERDRIVE CHANNEL – CONTOUR: Varies the critical
midrange tone in the overdrive channels. Adjusts from “classic”
midrange punch to “scooped metal” madness.
17. OVERDRIVE CHANNEL – GAIN SWITCH 1: Activates the
CONTOUR control for Gain 1.
18. OVERDRIVE CHANNEL – TREBLE: Adjusts the amount of high
frequency boost or cut as desired in the overdrive channel.
Turning this control clockwise adds clarity to your sound.
19. OVERDRIVE CHANNEL – MIDDLE: Adjusts the amount of
mid-range frequencies as desired in the overdrive channel.
Similar to the Clean Channel function, the O.D. Channel Middle
control adds body and punch to your sound.
20. OVERDRIVE CHANNEL – BASS: Adjusts the amount of low
frequency boost or cut as desired in the overdrive channel. Bass
is B-52’s signature. Turning this control clockwise increases
depth and low-end punch to your music.
21. OVERDRIVE CHANNEL – GAIN 2: Adjusts the amount of
distortion in Gain 1. (Activated LED indicates in use).
22. OVERDRIVE CHANNEL – GAIN SWITCH: Push switch Selects
between Gain 1 and Gain 2 controls. Activated LED lights
indicate which channel is currently use.
23 OVERDRIVE CHANNEL – GAIN 1: Adjusts the amount of
distortion in Gain 1. (Activated LED indicates in use).
24. INPUT CONNECTOR - LOW: Connects your guitar to the
AT-100. B-52 recommends that you use a cable that is
screened or shielded.
24. INPUT CONNECTOR - HIGH: Plug your guitar into either one.
Use the one that sounds best to you. Always use a high quality,
shielded instrument cable.