Road King Manual - Mesa Boogie

LOOP 2 MIX:This rotary control determines the dry/wet ratio of the Parallel Effects Loop in each of the 4 Channels. Remember that the SERIES(LOOP 1) Loop dry/wet ratio must be controlled at the processor that is inserted into its SEND & RETURN jacks. LOOP 1 has a2xEL342x6L6REAR PANEL CONTROLS & FEATURES (Continued)2x6L62xEL34 4x6L62xEL+4x6L6PROGRESSIVELINKAGENORMAL10% 90%LOOP 2MIXCH 4ABSPKRA +BONOFFLOOP 1ONOFFLOOP 2predetermined level of RETURN signal strength at the Return stage of the amplifier, which is critical to overallperformance. Only LOOP 2, because of its Parallel signal path, can be adjusted as to how much of its signal willbe fed back in with the main signal. Keep this fact in mind when dedicating the processors you wish to use toone or the other of the LOOPS.NOTE: Remember that the EFFECTS LOOP must be engaged in the EFFECTS LOOP section of the RearPanel and something connected to the LOOP 2 insert jacks for this control to have any effect on the signal.That wasn’t so bad…was it. Now you are a Master Of Channels and can confidently begin to dial and dedicate each of the fourChannels to a specific sound and application. Before we continue, take a while to enjoy these different Channels and we will pick it upwhen you finish to go over the EFFECTS LOOP and the rest of the features on the Rear Panel.EXTERNAL TRIGGERS:These two jacks provide trigger ports for the remote control of external effects devices, drum machines, samplers or anything that willaccept either momentary or tip-to-ground logic as a control language. By connecting a cable from the unit you wish to control to theseoffer or electricNo user-RefersonnelNORMAL10% 90%FTSWMIXHANDBUILTIN PETALUMACALIFORNIA, USALATCHINGPULSERETURN 2EXT. TRIGGERS2x6L62x 2xEL34EL342x6L6PROGRESSIVELINKAGEDIODECH 4ATUBE-TRACKING BRECTO SPKRjacks you may control the status of the device(s) by hitting the EXT TRIG button located in the centerof the Footcontroller. As mentioned, there are two types of logic and each has a separate jack so thatone button can control two devices.PULSE triggers a “one-shot” momentary type pulse that will control virtually anything requiring momentarypulse logic.LATCHING connects the tip-to-ground and latches them in this state until the EXT TRIG button receivesanother keystroke, at which time the tip is unlatched from ground.NOTE: Unshielded (speaker cable will work) cable is recommended for the control lines used in the EXTERNAL TRIGGER applications.If you have only shielded cable, this will suffice until such time that you can obtain unshielded cable.EFFECT LOOPS:As we mentioned earlier, there is a SERIES LOOP (1) and a PARALLEL LOOP (2) for your processing needs. The entire LOOPsection of the amplifier may be hard Bypassed to omit all associated loop circuitry from the signal path. When BYPASS is selected,both LOOPS along with their controls, the Front Panel OUTPUT and SOLO controls and twoLOOP SYSTEMACTIVEBYPASSLOOPS, SOLO& MASTERCONTROLSSEND 1RETURN 1WARNING: To reduce risk of fire or electricshock, Do not remove cover. No userserviceableparts inside. Referservicing to qualified personnel.NORMALNORMAL10% 90%SEND LEVEL FTSW MIXSEND 2 RETURN 212AX7’s are taken out of the circuit. This leaves the individual Channel MASTER controls asthe main volume controls. Front Panel LED indicators for each Loop located between the pairsof Channels to keep you abreast of LOOP 1 & 2 status.NOTE: It is important to understand that the two EFFECTS LOOPS were designed towork best with a unity gain signal. By increasing the gain on your processors Input orOutput beyond this point, you run the risk of experiencing a high pitched squeal or feedback.This is a result of the SEND and RETURN jack being connected together by addingexcessive gain at the processors Input and Output stage, thus reducing the internal separation between these stages we have builtinto the Road Kings’ EFFECTS LOOP. Why can’t there be more separation at this point in the circuit? There could be if we -and you- didn’t care about TONE. This is an extremely sensitive part of any amplifier, and we have always chosen these most critical partvalues on the side of TONE, knowing that if the loops are used properly - with high quality processors there will be no problems.PAGE 24