Dynamis D40 Owner's Manual - Page 7

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TUBES &

BIASING

POWER TUBES

The D40 is designed around 6L6 and EL34 tubes,

but will accept many octal tubes (EXCLUDING 6V6) &

gladly display their tonal characteristics.

PREAMP TUBES

The D40 uses 12AX7 (ECC83) preamp tubes in the

preamp of your amplifier. Preamp tubes do not need

to be biased & usually have a long life unlike power

tubes, but a preamp tube can become faulty at any

stage of its rated lifespan.

POWER TUBE BIAS

You will need a voltmeter or digital multimeter set to

the lowest DC voltage range. (Make sure you refer to

the meter's user manual).

Remove the rear baffle cover from the rear of

the amplifier. If you are replacing tubes, do so now with

the power off & the amplifier unplugged from the main

power receptacle. Place the new tubes in the correct

socket positions.

Turn the trimmer down by turning the trim

pot with a small screwdriver in the counterclockwise

direction. You can access the trim pot through the

small hole in the top of the chassis close to the power

transformer. If any fuses had blown, make sure to

replace them as well.

Now plug the amplifier into the main power

receptacle, unplug any guitar cables from the inputs & turn

on the main power. Let the tubes warm up for one minute.

Turn down the master volume controls to zero

& turn on standby to the ON position.

Verify that none of the tube fault LEDs are on.

If they are, power down the amplifier, remove the plug

from the main power receptacle & replace the faulty

fuse & return to step 3. If everything checks out, move

on to the next steps of setting the bias. If it is still

blowing fuses, a tube is at fault. Try a different pair..

SETTING THE BIAS

Place the black lead from your meter into the

black bias test point on the amplifier & the red lead into

the red bias test point.

Refer to the chart below for bias set points for

the tubes being used & slowly turn the trimmer in the

clockwise direction until the value is reached.

Now let the amplifier sit powered for 5 minutes.

We want the tubes to reach their maximum operating

temperature. Keep an eye on the bias reading during

this time.

Once the bias is set at the required settings,

return the chassis into the headshell if removed and

rear baffle panel to the rear of the amp & fasten it with

the screws you removed. You are done!

BIAS CHART

Type

Recommended

set point

KT88

95mV

90mV to 100mV

EL34

70mV

60mV to 80mV

6L6GC

85mV

80mV to 90mV

MIDI

SETUP

Versatile & optional MIDI control helps Revv amps

seamlessly integrate into any rig. The amplifier will store

up to 128 programs for program change commands as

well as accept Continuous Controller (CC) commands

to control functions directly. The amplifier also features

OMNI mode to allow control options on 16 channels, &

phantom power to power control devices.

What does that mean?

1. You can set up "presets" of switch positions on the

amp to recall quickly. (this could be used for clean,

crunch, rhythm, & lead, for example).

2. You can simply control anything's on/off state

(FX loop for example).

3. You can do a combination of both of those things.

4. You can do this with a computer for automatic

changes during songs, a MIDI floor control unit

instead of our footswitch, a loop switcher with midi

to control pedals as part of the "presets," a multi-

effects unit with MIDI control, & more.

5. You can do this with just our footswitch, or not at

all if you choose. External equipment just becomes

more beneficial when integrating your Revv with

additional pieces of a rig such as effects units.

OMNI MODE

Safe Range

OMNI mode off will allow the amplifier to be controlled

via a designated channel (1-16), & OMNI mode on will

allow the amplifier to respond to commands on any

channel. If other equipment is being used in a MIDI

system, it is desirable to set each piece of equipment to

separate channels. However if the amplifier is the only

piece of gear being controlled via MIDI, then setting

it to a specific channel is not required and using the

OMNI mode setting becomes preferable.

To toggle OMNI mode on or off:

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1. Make sure the power switch is in the off position.

2. Press & hold "Reverb" push button.

3. With the "reverb" push button being held, turn on

the power switch.

4. If the buttons were held correctly, then the CH1,

Ch2, Boost and Bright buttons will illuminate.

5. Release the Reverb and Store buttons once the

CH1, CH2, Boost and Bright Buttons Illuminate.

6. Press the CH2 button to select OMNI mode.

You have now toggled the OMNI mode setting. The

amplifier will restart automatically with the new setting.

If you experience any issues, cycle the main power

Note: The reverb LED will flash 3 times when it turns

OMNI mode on, & 4 times when it turns OMNI mode off.

MIDI CHANNEL SETTING

This amplifier can either automatically or manually

change the 16 MIDI channels you would like it to

respond to. The channel change is stored in memory

& only needs to be done when you need the amp to

respond on a certain channel.

1. To set the MIDI channel: With the power off, press

& hold the store button then turn on the power

switch. The amp will power up & begin to flash all

4 channel LEDs. Once this happens it is awaiting

the channel data to be received from the external

equipment (Automatic) or to be set manually.

2a. To set the channel automatically: (recommended)

With your external equipment ready (pedals,

computers, etc.) & set to the channel you want the

amplifier to be controlled from via MIDI, send a

command to the amplifier by pressing a program

change button or CC command on your external

equipment. Once the amplifier receives the data,

it will verify the channel it received & save it to

memory. Easy!

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