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Milbert Amplifiers is a company which manufactures high-end vacuum-tube audio equipment. While it is perhaps best known for its mobile vacuum-tube audio amplifiers, which were introduced in 1986 and are developed in collaboration with The David Berning Company, Milbert Amplifiers also produces unique vacuum-tube audio amplifiers using high voltage SMPS power supplies for guitarists and musicians.
- 1 BaM - Berning and Milbert Mobile Tube Amplifier
- 2 TC - Tube Preamp / Subwoofer Crossover
- 3 Liquid Mobile Tube Amplifier
- 4 GAGA - The Guitar Artists' Guitar Amplifier
- 5 DCJuiceBox Pedal Power Converter
- 6 Tube Data Archive
- 7 Earl Zausmer's BMW
- 8 Technical Information
- 9 Product Reviews and Independent Press Coverage
- 10 References
- 11 External links
BaM - Berning and Milbert Mobile Tube Amplifier
Introduced in 1986, Milbert's initial product offering, the BaM-230, a version of which is still currently produced (BaM-235ab), is based on David Berning's EA-230 high-end home audio amplifier, but designed and built for 12-volt automotive and mobile use. In continuous production for longer than any other car audio product, the BaM mobile tube amplifier has been called "the Holy Grail of auto sound".
TC - Tube Preamp / Subwoofer Crossover
In 1992, Milbert introduced the first TC in what has become a series of electronic audio-frequency crossover devices, made to work with any audio equipment and to capably complement the BaM tube amplifiers in higher-power audio systems.
Liquid Mobile Tube Amplifier
GAGA - The Guitar Artists' Guitar Amplifier
In July, 2009, Milbert introduced at the Nashville NAMM show its GAGA (Guitar Artists' Guitar Amplifier), a nearly weightless, fifty-watt guitar and instrument vacuum-tube amplifier which eliminates the traditional audio output transformer (and all traditional power supply magnetics) by using patented ZOTL Technology  licensed exclusively from The David Berning Company to almost perfectly (and bi-directionally) mate power tubes (in any combinations) and speaker load, resulting in transfer characteristics being -- for the first time ever in musical instrument amplification -- accurately and fully conveyed  between tubes and speaker(s). GAGA is also the first musical amplifier to include patented P3 Technology (phantom power for guitar effect pedals) as a standard feature.
The GAGA 90 production model became available in November, 2011. GAGA D-60, a domestic version offering 120V/240V mains and lower audio power, was announced in April 2012, followed by GAGA D-30 in October, 2012.
Writing in Vintage Guitar Magazine (January, 2014), Rich Maloof reviewed the 60-watt GAGA D-60:
"Lightweight and featuring an innovative, transformerless design, GAGA ... may even be unparalleled in matching versatility with satisfying tube tone. ... Well beyond [its] capacity for emulation is an opportunity to discover entirely new timbres and perhaps nail a sound that otherwise exists only in a player's mind."
Details, video interviews and press coverage links are available here.
DCJuiceBox Pedal Power Converter
The DCJuiceBox is a pedal power converter introduced by Milbert in September, 2013. It converts any 9-volt DC source into various independently regulated DC voltages, including 18-volts, 12-volts, and an infinitely adjustable 6- to 12-volt output, all at high current.
Tube Data Archive
In early 2009, Milbert Amplifiers became an official mirror of Frank Philipse's massive (multi-gigabyte) Tube Data Archive, which archives thousands of original vacuum tube (valve) data sheets and other related technical information.
Earl Zausmer's BMW
In the mid 1990s, Earl Zausmer built two competition car audio systems (one in a white 1992 BMW 540, and another in a red 1994 BMW 540i). These systems went on to win several national-level car audio titles. More than 200 newspapers around the country reportedly carried articles mentioning the cars, and the red BMW was highlighted in several major magazines, car audio and otherwise, including BMW's RONDEL and Time Digital Magazine. Technical information, photographs and newspaper- and magazine-article reprints are available here.
- Tubes vs Transistors: Is There An Audible Difference (PDF scanned original)
- Tubes vs Transformers: An Esoteric Exploration of Tubes, Transformers, Tone and Transcendence
- AutoStylin Magazine TechCorner article ( HTML | PDF ) including information on speaker power and efficiency.
- A schematic comparison of "tube" car amp designs.
Product Reviews and Independent Press Coverage
- The Absolute Sound magazine
- AutoStylin Magazine
- Car Audio and Electronics Magazine
- Car Stereo Review Magazine
- International Audio Review
- The Robb Report
- Soundslike Magazine
- Tone Audio
- Stereophile Magazine, Vol. 5, No. 1, p. 11
- The Absolute Sound High-End Journal, Vol. 13, Iss. 53, May / June, 1988
- Dorgay, Jeff, The Robb Report Collection, June, 2005
- Dorgay, Jeff, "Can You Achieve High End Sound In A Car?", Tone Audio Magazine, Vol. 3, April, 2006, pp. 21-23
- Milbert Amplifiers Product News Press Releases
- David Berning's patented ZOTL Technology
- White Paper, Benefits of ZOTL Technology
- Maloof, Rich, "Shape Shifter: The Milbert Amplifiers GAGA D-60", Vintage Guitar Magazine, January, 2014
- Frank Philipse's Tube Data Archive
- Auto Sound and Security Magazine, February, 1999
- Haas, Al, "Building the perfect car stereo system for an audiophile", Knight-Ridder Newspapers, Sunday, November 26, 1995
- Car Audio and Electronics Magazine, February, 1995
- Newsweek Magazine, November, 1997
- BMW Rondel Magazine, February, 1996
- Time Digital Magazine, November 3, 1997, pp. 30-33