CHANNEL 1 - TUBE

This channel is equipped with two tubes. One preamp tube is always included within the signal flow.

2ND STAGE switch adds one output stage tube into the circuit. This feature offers the choice between a so called hybrid amplifier (tube preamp with transistor power amp) and the sound of an all tube amplifier head.

CRUNCH control adjusts the tube pre- amplification.

TONE control sets the basic sound characteristics (frequency control 300 Hz - 14 kHz, see below). CONTOUR switch boosts bass and treble at once. LOW B/C 3-way switch for the boost/flat/cut of sub-bass frequencies. In boost position (red LED) the bottom-end is boosted, in cut position (yellow LED) it remains unmodified, but the deep-mids region is attenuated to obtain a clearer sound (chords, tapping, harmonics, etc.).

MID B/C 3-way switch for the boost/flat*/cut of the frequency determined via TONE control. In boost position (red LED) this frequency is boosted, in cut position (yellow LED) it is attenuated.

*The respective frequency will be slightly boosted when the switch is centered (flat). All boosts and attenuations are less intense in deeper frequency ranges than in higher spectra (300 Hz +6/+12 dB, 14 kHz +15/+20 dB, flat/boost).

HIGH B/C 3-way switch to boost/flat/cut high sound attributes. In boost position (red LED) treble is boosted (fixed preset), in cut position (yellow LED) the TONE control works as a low- pass-filter, means that frequencies higher than the TONE control setting are eliminated. Moreover the MID-boosts are softened by about 5 dB.

As you can see, the three 3-way switches and TONE control act in a very complex way. Therefore I would like to introduce some remarks and suggestions regarding sound adjustments:

1. Simulation of different pickup characteristics:

Each pickup has a peak in its resonance frequency in excess of which no treble can be transmitted. The main distinction in sound characteristics between different pickups is that this frequency is located elsewhere depending on pickup types. This is exactly what you can simulate in switch positions

MID boost and HIGH cut by shifting the resonance frequency with the TONE control (12 o'clock until full clockwise position). This requires that the resonance frequency of your bass pickups lies beyond that of the desired simulation. Furthermore this adjustment allows to boost highest trebles that your bass can produce, by cutting even higher pitches so as to diminish

2.Speaker Emulator (when CRUNCH is drivenIV highly until distortion):

In case you have adjusted a distorted sound with the CRUNCH control and use a loudspeaker cabinet with tweeter (or send the sound via the DI OUTs to a mixer), you should eliminate high- pitched frequencies with HIGH cut, as they can be very unpleasant for the human ear. When

MID boost is activated at the same time, the sound

will be more aggressive, whereas the simultaneousTube use of MID cut results in a smooth but however

deeper cut of treble (see graph).

If necessary you can turn the TONE control further clockwise.unnecessary noise.

3. Semi-parametric EQ:

When the MID 3-way switch is set to boost, flat (center position, slight boost) or cut, you can pre-

adjust the basic timbre of your sound with the TONE control like with a semi-parametric filter. As already mentioned, the degree of boosts or cuts depends on frequency ranges. These have been determined so as to obtain efficient results by quick adjustment.

Pro

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Warwick AMPs owner manual Channel 1 Tube

AMPs specifications

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