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Quick Setup

1. Plug your guitar using a 1/4” instrument cable into the INPUT on the far left of the front panel
2. Plug a suitable power cable from the OSD’s rear panel MAINS cable inlet to your wall power receptacle
3. Plug the OSD into your speaker cabinet using 1/4” speaker cable
4. Set the IMPEDENCE selector to the match the impedance of your speaker cabinet
5. Plug the OD Switch cable into the FOOT PEDAL jack on the rear panel of the amplifier
6. Set the OD TRIM control on the rear panel to 1/4
7. Set all rotary controls on the front panel to middle position
8. Turn VOLUME and MASTER control to 1/4
9. Set front panel MID BOOST switch in the DOWN position (OFF)
10. Set front panel ROCK / JAZZ switch in the DOWN position (ROCK)
11. Set front panel POWER switch in the upward ON position (with adjacent switch to STANDBY) for 30 seconds to allow tube filaments to warm up
12. Set front panel STANDBY switch upward to the ON position.

When you kick in the OD:

RATIO serves a sort of volume control for the overdrive channel. There are not individual master volume controls for the clean and overdrive channels. The RATIO control serves to balance out the volume of the overdrive channel with the clean channel.

LEVEL adjusts the amount of gain, and in therefore distortion in the overdrive mode.

OD TRIM control adjusts the signal strength sent to the first tube in the OVERDRIVE channel. Lower settings yield more touch-sensitive, lower gain sounds. Higher settings are more compressed, higher gain, and more harmonically complex. Start with the control between 10:00 and 12:00 (clock face), but experiment for your own ideal tone!

When you kick in the PAB: you bypass the preamp tone stack giving the OSD a more mid-heavy signal and a little more grunt and growl.

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Stephen
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