Mesa/Boogie Mini Rectifier Twenty-Five User Manual

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Someoftheotherrecommendedbiasing,“methods”—suchas-”..tubesrunningredhot,increasethebias..soundsharsh
andrunstoocool,turnitdown...”areguessworkatbest.Luckily,oneofthegreatthingsabouttubeampsisthattheycan
usuallystandsomeabusewithoutcausinganyrealharm...atleastnotimmediately.Butdon’tthesealterationsimplythatyou
aresecond-guessingtheampdesignerandthatthere’sabettersetofoperatingconditionsthatthedesignermissedbutthe
tubesellershavediscovered?
Nowsomeplayersmaylikethesoundoftheirampalteredbytubeswithextremecharacteristicsandwiththebiassettohelp
compensate.Butoftenitisthemerenoveltyofchangethatthey’rereallyrespondingtoandwhentheampgoesbacktothe
properoriginalway,we’veseenthembefarhappierstill!
Becauseeverypartineveryoneofourdesignshasbeenmeticulouslyevaluated,comparedandstressedover—nomatterhow
seeminglyinsignificantitmightbe.Andwitheverydesignwelookfora“sweetspot”wherealltheparameters—includingthe
bias—cometogethertogivethebestsonicperformance,consistentlyandreliably.Everypartandvoltageisimportant—yet
noonecomplainsthattheseotherparametersaren’tavailablefortinkering.
ConsiderourpatentedSimul-Classcircuitrywheretherearetwodifferentbiasvoltagesusedforseparatepairsofpowertubes
...andchangingonevoltagealsochangestheother.Greatcaregoesintogettingthisjustrightandwethinkwe’dbeaskingfor
troubletohaveitadjustablefortheworldtoplaywith...unlessyoulikepayingtohaveyourampmessedup.Sorry,Imeant
tosay,“Uh,...yourampneededbiasing.”
Ifthatdoesn’tappealtoyou,thenmerelyplugamatchedsetofMESAtubesintooneofourampsandyou’rereadyfortone.
Guaranteed.You’dbeamazedatthenumberofservicecallswefieldeverydaythatleadtoadiagnosisofout-of-tolerance,
non-spectubeproblems.Tothinkthesewouldbepreventedbyincludingabiasadjustmentissomethingofaninsulttoyou
andus.Ifyouputthewrongsizetiresonyourcar,doyouthinkchangingthepressurewillmakethemright?
Please,don’tthinkthisisablanketindictmentoftheotherguyssellingtubes—itisn’t.Andtheirtubesaren’tallbadeither.
Itjustdoesn’tmakesensetopaymoreofyourhardearnedcashfortubesthatwereprobablymadeinthesameRussianor
Chinesefactoryandwhichhavethepossibilityofbeingoutsidetheperformancewindowweselectforyouramp.Anditpains
ustohearthehypeandmystiquebuiltuparoundbiasingwhentwenty-fiveyearsofevidenceaffirmsourdecisiontomakebias
circuitsthat“neverneedadjustment”.HowmuchmoneyandtroublethathassavedMESA/Boogieplayersyoucouldn’testimate.
OurrigorouslytestedandhandselectedtubesareavailableatyournearestMESA/BoogieProCenterorfromusdirectly.Nobody
offersbetterprice,qualityorwarrantythanwedo...sowhyswerve?
Cheers!
RandallSmith
Designer&President
MESA/BoogieLtd.
BIAS ADJUSTMENT (Continued)
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Mesa/Boogie Mini Rectifier Twenty-Five Specifications

General

Brand	Mesa/Boogie
Model	Mini Rectifier Twenty-Five
Category	Musical Instrument Amplifier
Language	English