perfection and very little compression. This works best while the band is playing with you.
Remember - less is often more.
4.1.4 Channel Four ( Ultra High Gain)
The Solo channel. A little more mid heavy then channel 3, therefore punches through the
band sound quite well. See channel 3 description for gain control setting. Often a gain
setting near 1:00 o’clock is sufficient for absolute high gain distortion. Use the volume
control here and for all other channels to match the individual channel volumes
4.2 Preamp tubes
The preamps are stocked with 12AX7 tubes. These tubes are not used as power tubes
and therefore last much longer than the much larger power amp tubes. However, preamp
tubes of different brands and styles produce differences in gain and tone behavior.
4.3 Noises and Microphonic Preamp Tubes
the first preamp tube ( input stage is especially prone to becoming microphonic. This is
noticeable by a feedback like tone at higher volumes. Replace the first tube with a 12AX7
High Grade tube if this happens.
Even though tube amplifiers are not typically very quiet amps, you should expect
unusually small noise levels from your Diezel amplifier. Some idle noise in channel 3 and 4
is normal, due to the higher gain structures of these channels.
Chapter 5
VH4/VH4S Power amp(s)
5.1 Tone and Volume of the Power Amplifier
5.1.1 The Master Volume
controls the final volume of the Power amplifier(s). The layout of the controls is such that
full volume is achieved at the 1:00 o’clock knob setting. Turning the knob further will
overdrive the power amp(s) to create power amp distortion for those of you that prefer
this sort of thing. We added this feature to round out the distortion sound palette on the
extreme end. So you friends of all things vintage can get colorations and distortion
textures that only power amp tubes can deliver. Bring your ear plugs, please.
5.1.2 Parallel Loop Mix
See 3.2.3 for function of the loop. The parallel loop mix control adds effect signal to the
original signal in relation to the control knobs setting. Don't forget: Effects unit 100% wet!
Also, this control allows for a programmable second master volume as described in 3.2.4
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