Single Channel Amplifiers

All Dave Hall single channel amplifiers have the same features as the channel 2 on the twin channel versions.

Single Channel Amplifiers Range and Features

No. of

Channels

Valve

Rectifier

Reverb

Master

Volume

Triode

Pentrode

Switch

Effects

Loop

Footswitch

Gain selection

Bright

Switch

Mid Boost

(FAT)

Switch

Bass Boost

Switch

Standby

Switch

Head

1x12"

Combo

2x12"

Combo

Output

Cathode

or Grid

bias

switch

SR30-VR-H

1

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

25-30W

Yes

SR30-VR-C

1

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Option

Option

25-30W

Yes

S30-VR-H

1

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

25-30W

Yes

S30-VR-C

1

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Option

Option

25-30W

Yes

SR50-VR-H

1

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

50-60W

Yes

SR50-VR-C

1

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

Yes

50-60W

Yes

S50-VR-H

1

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

50-60W

Yes

S50-VR-C

1

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

Yes

50-60W

Yes

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Single Channel Amplifiers

25 and 50 Watt – Class AB valve rectifier designs.

Point to point hand wired.

Master Volume.

3 spring all valve reverb.

Parallel effects loop with wet/dry mix.

Gain, Volume, Bass, Mid, Treble, Bright Switch, Mid Boost (Fat) Switch, Bass Boost Switch, 2 levels selectable gain.

Foot-switch for gain selection.

6L6 or EL34 output valves in 50W version.

6V6 or EL84 output valves in 25W version.

Half power Triode/Pentode switch.

Cathode/Grid Bias switch.

2x12” or 4x12” speaker cabinets.

2x12” Combo version.

Traditional 18mm plywood or solid pine enclosures.

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A total of 9 high quality valves are used in all Single channel designs producing the widest range of tones possible.

All Single Channel amps have selectable 2 stages of gain available, plus Bright, Mid and Bass Boost switches; this provides the user with an almost unlimited range of tones and levels of distortion. The tones possible include a 60’s Brit Plexi, US Twin, Classic top boost 60’s combo and modern high gain. Sustain and tone are what this amp is all about and by finding the right combination of gain, tone, volume and master volume setting any guitarist can find and develop his or her own sound, it’s in there!

1x12” or 2x12” speaker options are available in Celestion Vintage 30 or Celestion Greenbacks. Covering options include Tolex or Tweed.

A 3 spring accutronics reverb unit is an option and it uses 2 driver valves and a 3W reverb transformer for a real valve reverb sound. The parallel effects loop is standard on all amps and it uses 2 stages of gain (1 x 12AX7) to provide an in-phase mix. The level of the wet/dry mix of the effects loop is adjustable via a rear panel pot.

A Triode/Pentode switch is fitted on the rear panel as standard. When in normal Pentode mode the output valves are wired in a Pentode configuration and will provide the full output possible with the Class AB ‘bite’ at the top end. But switch to Triode configuration and the power is reduced by about 40% and a very sweet warm tone is generated when driven hard which is very similar to a Class A.

Cathode or Grid bias is selectable via a switch on the rear panel. When Cathode bias is selected a warm smooth sound is generated by the output valves which removes alot of the attack, once again just like a Class A. Grid bias is the most common method of output valve biasing so when selected you get lots of Class AB bite

The type of output valves used is are optional, 6V6GT’s (25W) and 6L6 (50W) are one option and provide a very soft fat sound great for Jazz, Blues and Rock. EL84 (25W) and EL34 (50W) output valves are the other option and they have a tighter more compressed sound with a harsher breakup distortion just the thing for Rock and Heavy Metal.

All Dave Hall amps use a GZ34 valve rectifier (that’s what the VR means!) which really comes into effect when the amplifier is used at medium and high power. When used like this the amplifier will compress and sustain notes and chords without losing tone in a way that no solid state rectifier circuit can.

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