Ampeg B500DR - Manual (Page 4)

4
The Front Panel:
1. INPUT 1, INPUT 2: Use these jacks to connect your instrument(s)
to the amplifier by means of a shielded instrument cable. Only one
Input jack is active at a time, as determined by the Input switch (#2).
2. INPUT: Use this switch to select which of the Input jacks (#1) is
active. The LEDs adjacent to the jacks indicate which of the Inputs is
active. This feature is perfect in situations where a player switches
between two instruments during a performance: you may start with
the instrument connected to Input 1, for instance, then change to the
instrument connected to Input 2 - without changing patch cords!
3. PAD: Use this switch to activate the input pad - if your instrument
has active or high output pickups, activating the pad will allow you to
set the Gain control (#4) at a more useable setting. The adjacent LED
illuminates when the Pad is active.
4. GAIN: Use this control to adjust the input signal level. When a sig-
nal is present the LEDs around this control act as a Peak indicator:
adjust the Gain control until the two LEDs furthest clockwise flash
occasionally while playing. Once you have adjusted the Gain control,
the LEDs serve as a VU meter and will illuminate according to the
strength of the signal from your instrument.
5. ULTRA HIGH: Use this switch to boost the high frequencies. The
adjacent LED illuminates when the Ultra High is active.
6. ULTRA LOW: Use this switch to boost the low frequencies. The
adjacent LED illuminates when the Ultra Low is active.
7. BASS: Use this control to adjust the low frequency output of the
amplifier.
8. ULTRA MID: Use this control to adjust the midrange frequency
output of the amplifier.
9. TREBLE: Use this control to adjust the high frequency output of
the amplifier.
10. FX BLEND: Use this control to adjust the mix between the direct
(dry) signal and the effects (wet) when the effects loop (#24-25) is
used. Full counterclockwise results in all direct signal (no effect) and
full clockwise gives all effect and no direct signal. The clockwise posi-
tion is equivalent to a series effects loop and should be used with
such devices as limiters and equalizers.
11. PRESETS: Use these switches to select one of four presets for
the amplifier. Complete information on presets and programs is on
page 7.
12. MASTER: Use this control to adjust the overall output level of the
amplifier.
13. LIMIT DEFEAT: The B500DR employs a limiter circuit to prevent
overdrive distortion at or near full power. This switch, when depressed,
disables the internal limiter circuit. The adjacent LED illuminates when
the limiter circuit is operating.
14. POWER: Use this switch to turn the amplifier on (top of the switch
depressed) and off (bottom of the switch depressed).
1 2 3 4 7 8 9 10 14 12 13 11 5 6
B500DR Programmable Bass Amplifier