Colby Amplification MM22 Gebruikershandleiding - Pagina 4

Blader online of download pdf Gebruikershandleiding voor {categorie_naam} Colby Amplification MM22. Colby Amplification MM22 4 pagina's. Mod machine

Mains Fuse



MM12/50 uses a 2 amp slo-blo fuse



MM22.100 uses a 4 amp slo-blo fuse

HT Fuse. Both amps use a 1 amp slo-blo fuse

BIAS: This switch changes the way the power tubes are biased. Fixed bias puts a negative voltage on the

control grids of the output tubes. Always use matched tubes but in this mode, the tubes can run hot or

cold depending on the bias setting which is controlled by an internal trim pot. Please bring the amp to a

qualified tube amp tech for proper biasing. Fixed bias is the traditional method of biasing for the big

British amps. However the MOD MACHINE has a Cathode bias mode. This is normally used in smaller,

low powered amps but changes the feel and sound. The Cathode bias mode gives a bit more touch

sensitivity, compression, somewhat less overall power and chunkier low-mids.

MODE: This switch allows you to reconfigure the EL34 power tubes from the traditional high power

Pentode mode to a lower power Triode mode. The Triode mode also has a less high end so you will

probably want to set the tone controls differently for each mode. In the Pentode mode you may want to

cut the highs by lowering the Treble, lowering the Presence or increasing the High Trim, or the opposite

in the Triode mode.

Speaker jacks. Use the top one for the first speaker and the bottom on for a second speaker

Impedance selector: 4, 8 and 16 ohm settings

Effects loop SEND and RETURN Level controls

Effects Loop SEND and RETURN jacks

Notes on the Loop:

The loop in these amps is all tube and carefully designed so that your tone is preserved. The send is a

cathode follower so that you can run long cables without any or much effect to your tone. The return is

a "normal" gain stage. There can be some tonal effect however when you run long cables and lots of

small cables between your effects. Be careful not to overload your pedals if you are using them in the

loop. Some pedals are very happy with high signal levels, some are not. For pedals, it is recommended

that you set the Send control to 12:00 or less and the Return for unity gain (the volume is the same with

the effects loop on or off). Effects that should be used in the loop include reverb, delay and other time

based effects. Other effects such as compression, OD and distortion are better used in front of the amp.