When the rocker switch is set to "Headphones," the output level remains constant, but the tip is connected to ring internally on the jack making stereo phoning possible. Use the Master to adjust the listening level. Keep in mind the type and quality of headphones greatly affect the performance of this circuit, with the fully enclosed, studio quality type producing the best results.
CONTROL JACKS:
EXTERNAL SELECT: V-TWIN can be controlled by an external switching source to select between two of the three modes. This can be most any tip to ground type switch logic. This feature makes possible the inclusion of V-TWIN into programmable rigs or multiple pre-amp rigs where the units within are controlled by a programmable switcher.
NOTE: V-TWIN must remain in the power-up switch logic to be controlled via this jack. In other words...every time you get ready to use the unit in an External Select situation, remove the A.C. adaptor and plug it back in without choosing any modes...Leave it alone. This procedure clears the switching logic leaving the circuit in the receive-ready state and awaiting commands from the external switching device.
EXTERNAL BYPASS: The Bypass function may also be triggered by an external switching device. This logic is controlled via a standard tip to ground type switch. This jack performs the same function as the footswitch located on the face of the unit. It is wise to use the same power-up procedure as when using the External Select to clear the switching logic.
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TO POWER AMP: | This jack provides | a hotter signal level and a slightly different E.Q. curve for |
TO POWER | | | interfacing with the FX Return stage of any amplifier, or |
STEREO SIMUL | CLASS 2 : NINETY | simply to use V-TWIN as a stand alone pre-amp with an |
AMP | MESA | existing power amplifier. (We suggest an all tube power |
| LEVEL A | LEVEL B |
| | |
| | | amp...e.g. MESA'S Stereo Simul-Class 2 : Ninety or |
| | | Fifty / Fifty.) |
JACK | | | The level here should be more than enough to drive even |
LOCATED ON | | |
| | much less sensitive Non-MESA amplifiers. |
BACK PANEL | | |
OF V-TWIN | | | NOTE: | |
| | | When the Bypass Footswitch is selected (and |
| | | |
| | | the LED goes out,) all sound is muted at this output. |
MIXER / HEADPHONES: | This 1/4" output and its accompanying switch ( located on the side panel ) |
TO MIXER / | | support V-TWIN's recording circuit. This circuit is voiced to re-create the |
| sounds you're accustomed to hearing from the "To Guitar Amp" and "To |
HEADPHONES | |
| | Power Amp" outputs. With the Record circuit mode switch |
| | |
CH3 CH4 | CH5 CH6 CH7 CH8 | set to "MIXER," the output level is optimized for console |
| | |
| | MIXER | input stages (with all controls set at 12' o clock = +10 db.) |
| | This should be more than adequate for most all direct |
JACK | | | applications, allowing adjustment in either direction. Use |
| | the Master control to vary the level at this output. |
LOCATED ON | | |
BACK PANEL | | | | |
