Vox BRIAN MAY SPECIAL VBM1 - Manual (Page 6)

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In a nutshell, the Brian May Special is a 10 Watt, 1 x 6.5" combo that sounds
identical to Brian’s homemade “Deacy System” (i.e. his Treble Booster/Deacy amp
combination) and also offers the following additional features that dramatically
enhance its flexibility:
Controls for Gain, Tone and Volume plus a High/Low Gain switch.
A Booster Output that allows you to use the Booster section of the
Deacy to drive another amp. This is a very useful facility as Brian uses
his homemade Treble Booster to overdrive the AC30s he uses live
and the Booster section of the Brian May Special sounds exactly the
same as Brian’s homemade device.
An Emulated Recording/Headphone jack.
An External Speaker jack.
IMPORTANT NOTE: In Brian May’s “Original Deacy System” both the Treble
Booster and the Deacy amp are powered by 9 Volt batteries. Because of this the
Brian May Special has two “battery simulation circuits” (one for the Booster sec-
tion, one for the amp section) that emulate the unique characteristics of batteries.
For more information on the combo’s features, read on....