Mesa/Boogie RECT-O-VERB 50, SOLO 50 owner manual Speakers, Effects Loop Send / Return & MIX

LEAD

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CHANNEL SELECT:

This switch simply allows you to switch between the two channels (RHYTHM and LEAD) without using the Channel Select Footswitch or, when one is not available. To use the footswitch however, the Channel Select switch must be in the (up)

SET TO RHYTHM RHYTHM position.

WHEN USING

FOOTSWITCH

RHYTHM

SPEAKERS:

Sensitivity to speaker mismatching in regards to ohmage differences is low, hence no damage to the amplifier will occur. However, very low ohmage loads will cause the power tubes to wear faster. The RECT-O 50 (combo only) is equipped with a Celestion Custom 90 single 12 inch - 8 Ohm speaker, but as you can see, other speaker configurations may be

	SPEAKERS		used. When using two 8 Ohm speakers, connect each of them to the 4 Ohm speaker jacks that are
			provided, this will equal a 4 Ohm load which is the proper impedance required when using this particu-
			lar speaker configuration.
8 OHM	4 OHM	4 OHM

EFFECTS LOOP: SEND / RETURN & MIX

These two 1/4" jacks are the patch point for external signal processing effects. The EFFECTS LOOP in the RECT-O 50 is wired in parallel with the unaffected or dry signal which enables you to preserve the integrity of the all tube tone and feel that the RECT-O 50 is capable of delivering. To use the EFFECTS LOOP for your processors, simply connect the Effects Loop SEND jack to your first effects’ Input jack. Connect your last effects Output jack to

		EFFECTS LOOP			the Effects Loop RETURN jack.
					Use the rotary MIX control to blend in the desired amount of the processed signal with the original
10%	10		0%		dry signal. The least degradation of signal is usually found by setting the processor’s mix at 100%
					and the EFFECTS LOOP MIX control at the lower end of the control. In this manner the least
FX MIX			RETURN	SEND
					amount of your pure tone will be processed and you will be dialing in a “very small amount” of a

“very wet” signal to be mixed with the original. This method seems to produce the best results for tone and signal to noise ratio. The EFFECTS LOOP interrupts the signal between the pre-amp and power section. Therefore, the RETURN jack can double as a power amp input jack. You will also want to run the MIX control at

100% to use the EFFECTS LOOP as a Power In patch point. Connect your last effects’ Output jack to the Effects RETURN jack. We suggest that when using the RECT-O’Spower section only, that you have the amp switched to the Rhythm channels’ CLEAN Mode or the Lead channels’ Vintage mode. This assures a more neutral power sensitivity thus making the RECT-O 50 more friendly to use as a power amp. See PRESENCE control section of this manual for more information.

REVERB: RECT-O-VERB COMBO & RECT-O-VERB HEAD

These self explanatory controls deliver the rich natural reverb sound. Although the circuit is the same for both RHYTHM and LEAD

channels, the amount of Reverb available is not. In the LEAD channel there is slightly less Reverb available overall because of this
						channels’ very nature. The reason behind this is two fold: 1.) that it is easier to prevent
						the massive amount of Gain and signal strength present in the Modern high gain Mode
			EFFECTS LOOP			from causing unwanted Reverb oscillations. 2.) This channels aggressive nature lends
						itself more to musical styles where high settings of Reverb are simply not traditional.
				1		Don’t worry...there is still plenty of Reverb for drenched solo work in both of the Lead
					REVERB	Modes. Simply run the control a little higher than that of the top channel.
10%		10 0%		2
	FX MIX RETURN			SEND