Original Posters Noted
Here for your edification is a short history of the studio caliber series amps....most of the information here is sourced from the vintage guitar price guide(2008) and the mesa product guides for 1984/1986/1995 and 2004 respectively.
The caliber series was launched in November 1985 with the release of the studio caliber.22.As the name suggests it was Boogies first low wattage practice amp and the low price ensured it was a huge hit as now guitarists could afford a boogie without remortgaging their house lol.The next step was to extend this budget range with higher output models the .38 special(four el84 tubes,38 watts) and the.50 caliber(two 6l6 tubes,50 watts) or so advertised the 1986 product guide!!! in practice the four el84 model came out in January 1987 and ran until the end of 1988 and was repackaged as the .50 caliber and was revamped with 6l6 tubes and a pull channel switch from 1992 til 1993 and called the .50+ cal.The original studio .22 was revamped as the studio .22+(in December 1988) with an added lead master switch and plastic toggle switches for on/off,stand by and eq which were previously the metal mark series type(this was the same for the revamped .50+ cal).In 1993 this range was replaced by mesa,s second budget range the Dual Caliber amps. 8)
Posted by : bartchamdoh Wed 5-13-2009
viewtopic.php?f=28&t=44396
Links for Lead Master Mod for the Studio 22+
viewtopic.php?t=20415&highlight=schematic
http://acapella.harmony-central.com/sho ... ?t=2223437
If I recall this correctly, serial number range for Studios .22+ goes from FP11,500 (December 88) up to FP28,560 (August 93).
Regards
_________________
Daniel (IGFRASO)
Seems like about 16,000 built. Survival of 25 year old gear being what it is, I figure at least 10,000 still out there.
Regards,
Bigbean
