Mesa/Boogie OOGIEBMESA Owner's Manual download pdf (Page 17)

PAGE 13

FX LOOP: Series

The LONE STAR handles outboard processing by providing an on-board patch point between the preamp

and power section. This loop is wired such that the dry signal is in series with the effected (wet) signal. The circuit also incorporates

a SEND LEVEL control allowing you to ﬁne tune the output of the

preamp circuit to match the input sensitivity of your processor (or ﬁrst

processor in a rack system). The EFFECTS LOOP circuitry can be

completely removed from the signal path with the HARD BYPASS/

LOOP IN mini toggle. This removes all associated loop circuitry and

two tubes from the chain and ensures the purest signal path and

maximum sonic performance when outboard processing is not being

used. The SEND and RETURN jacks incorporate switching elements

so that you may use the LOOP IN selection and activate the Front

Panel OUTPUT and SOLO controls with nothing connected to the Loop.

NOTE: The Front Panel OUTPUT and SOLO controls are both part of the Loop and therefore active only when the Effects Loop

is engaged. They are both part of the Return stage and will remain inactive as long as the loop bypass mini toggle is set to HARD

BYPASS.

To connect your outboard processor(s) to the Effects Loop;

1.) Connect the SEND jack on the LONE STAR Rear Panel to your processor’s INPUT using a high quality shielded cable of the

shortest possible length.

2.) Connect the RETURN jack of the LONE STAR to your processor’s OUTPUT also using a high quality shielded cable of the short-

est possible length.

3.) Adjust the SEND LEVEL control on the Rear Panel of the LONE STAR to achieve an adequate match on the INPUT level indicator

of your processor. Adjust the processor Output level stage (hopefully your processor has an OUTPUT LEVEL control) to match the

volume present before connecting the device(s) to the LONE STAR. You can check this by simply removing both the cables from the

SEND and RETURN simultaneously.

4.) Use the Front Panel OUTPUT control to raise and lower the overall volume as it is essentially an Effects Return Stage volume

control.

NOTE: It is normal to experience some amount of change to the sound when using the EFFECTS LOOP. Normally this is minimal

and most often appears as a subtle roll off in top end characteristics. This is a series loop and therefore the results you get using

it greatly depend upon the quality of the devices you insert into the loop. We strongly suggest taking your ampliﬁer and trying any

processor before buying it to make sure it is compatible with the LONE STAR. Normally, the more professional series lines of most

companies building outboard gear work well. However we have seen even so called pro stuff produce less than satisfactory results

in terms of tonal thievery.

NOTE: Engaging the EFFECTS LOOP circuitry adds a substantial amount of circuitry and two tubes and this additional circuit re-

verses the phase of the entire amp. This is no cause for alarm and if we hadn’t told you of this, you probably would never have known.

Sonically there is no difference other than the incredibly subtle difference in the sound the circuit itself adds.

The only time you will ever need to consider this reversal of overall phase is if you ever run the LONE STAR in Stereo with another

amp (not another LONE STAR as it would be in phase with its Loop activated). In this case you would probably want to separate the

two ampliﬁers by at least a few feet if not on the other side of the stage.

NORMAL

MIN

SEND LEVEL

First set sound with

LOOP bypassed. Then

set SEND & OUTPUT

to 50% for unity gain.

With LOOP IN, adjust

SEND to match FX.

Use OUTPUT for

RETURN level and

live volume control.

SEND

RETURN

LOOP

HARD BYPASS

LONE STAR

TUBE LOCATIONS

1 x 5U4 4 x 6L6

REAR PANEL:

(Continued)

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Mesa/Boogie OOGIEBMESA Owner's Manual Page 17

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