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Jul 04, 2009 - 03:56 AM
| Paul Stubblebine Mastering Hosts Tube Amp Design Class |
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| Participants learned about design concepts and built their own amp
 Paul Stubblebine Mastering & DVD (PSM) recently hosted a unique tube amplifier design and hands-on building class at their San Francisco studio facility. Amplifier designers Dan Schmalle and Paul Joppa of Bottlehead Corp led the three-day class. In addition, tips and procedures on the process of Mastering music was woven into each day by engineers Paul Stubblebine and Michael Romanowski to highlight the connection between equipment and the mastering process. New “how to” hands on classes are planned on amps and other components in the near future, visit www.paulstubblebine.com for more information.
The amplifiers for Stubblebine’s quad-amped Magico speakers were modified by Dan Schmalle and Paul Stubblebine, using design techniques shown in the amp-building class. Stubblebine said, "There are three important elements in mastering, listening experience and ears, room acoustics, and the choice of equipment. I have spent a lot of time comparing and modifying my equipment to allow me to hear and change audio in subtle but important ways. These amplifiers are quite special."
Fourteen participants attended the amp building class, some even flew in from other states. Worktables were set up with soldering irons, lighted magnifiers and all the components to build the tube amplifiers. Instructions handed out as printed PDF files were also projected on an overheard screen so the instructors could point to each step and explain.
Each of the three days was a full 9am-to-6pm schedule with a break for lunch. Participants were led through the Amp Design Process, from the audio circuit, parts familiarization, hardware assembly a soldering demonstration, detailed design of the power supply components including transformers, chassis wiring, layout, grounding, and shielding. Each day lecture time was also allotted to the basics of audio mastering, format comparisons, and software and hardware. The final day included the all-important “smoke test” to make sure nothing blew up when you plugged it in!
At the end of the process participants were able to listen to their hand crafted amplifiers in Paul Stubblebine’s studio, listening to first-generation master recordings for source material.
Tube amp kits are available for sale from the Bottlehead website called “Single Ended eXperimenter’s” amplifier kit retails for $369 plus shipping. Visit the Products section of their website at: http://www.bottlehead.com/
About Paul Stubblebine Mastering & DVD
PSM mastering engineers include 30-year veteran sound engineer and owner Paul Stubblebine and Michael Romanowski. Over the years Paul has mastered a wide variety of music including classic sounds of San Francisco: The Grateful Dead, The New Riders of the Purple Sage, Sly Stone, Santana, Joan Baez, Bill Evans and practically every release for David Grisman’s Acoustic Disc label to name just a select few of his projects.
Michael Romanowski has been mastering music in the Bay Area since his move here from Nashville in 1994. Michael has mastered releases ranging from rock and jazz to punk and folk. Some of the artists he has worked with include Badfinger, Pete Ham, Norton Buffalo, Joe Craven, Too Short, E-40, Jacqui Naylor, Mimi Fox, The Samples, Jim Campilongo, Dallas Wayne. Houston Jones, Big Brother and the Holding Company, The Trichromes, Lydia Lunch, The Radiators, Runaways UK, and Free Peoples.
To ensure the highest quality and to produce the best sounding masters, PSM offers carefully selected audio technology such as the Pacific Microsonics analog and digital converters, and for SACD Meitner converters; Esoteric Audio Research, Z-Systems, Weiss and TC Electronic signal processors, and mastering workstations from Sonic Solutions and Sadie, along with Alon Wolf designed “Magico” speakers. For more information visit the PSM website at www.paulstubblebine.com, or call (415) 522-0108.
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