Guided Tour - Model 3500/5500 Front Panel - Hartke HA3500 Owner's Manual

Guided Tour - Model 3500/5500 Front Panel

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1. Passive Input jack - If your bass guitar has passive circuitry, connect it to
the Model 3500/5500 here. This standard, 1/4" unbalanced jack provides a high
impedance (100 k Ohms) input sensitivity of 20 millivolts.
2. Active Input jack - If your bass guitar has active circuitry,* connect it to the
Model 3500/5500 here. This standard, 1/4" unbalanced jack provides a high
impedance (100 k Ohms) input sensitivity of 60 millivolts.
3. Pre-Amp A (Tube) control - This determines the amount of preamplification
being provided by special circuitry which delivers the sound of a classic tube
amplifier (this circuitry actually includes a real tube!). Note that when both Pre-
Amp knobs are used at equal settings, the amplifier will be twice as loud as when
only one is used. Avoid setting both Pre-Amp knobs on maximum ("10"), since
the result will almost always be undesirable distortion.
4. Pre-Amp B (Solid State) control - This determines the amount of preampli-
fication being provided by special circuitry which delivers the sound of a solid
state amplifier. Note that when both Pre-Amp knobs are used at equal settings,
the amplifier will be twice as loud as when only one is used. Avoid setting both
Pre-Amp knobs on maximum ("10"), since the result will almost always be unde-
sirable distortion.
5. Compression LED - Provides a visual indicator of the status of the compres-
sion circuitry. When lit steadily green (for example, when the Compression knob
[see #6 on the next page] is set to "Off"), no compression is being applied. When
unlit, compression is being applied to the incoming signal at a ratio of approxi-
mately 2:1. When flashing red, the compression ratio is approaching infinity
(limiting is being applied to peak signals). When lit steadily red, the entire signal
is being limited. This LED "follows" the incoming signal, changing continuously
as different amounts of compression and/or limiting are being applied. For more
information, see the "About Compression" section on page 12 of this manual.
* Bass guitars that have active circuitry normally require a battery for the circuitry to
be functional.
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