Manley VOXBOX - MVBXA 4/2003 - Manual (Page 3)

INTRODUCTION
THANK YOU!...
for choosing the Manley VOXBOX. This unit is the result of our customers asking us to make a
vocal oriented combination from some favorite Manley designs. We combined the Manley Mic
Preamplifier, Electro-Optical Limiter, and Mid Pultec and then went further. Uniquely, we put a
compressor before a minimalist mic preamplifier. This can substantially reduce distortion while
having no more sonic imprint on the signal than the mic pre by itself because the compressor is just
a passive light dependent clamping resistor. For those who want the shortest path to tape, but use
compressors, this has to be the ideal solution. We added attack and release controls to the com-
pressor with some “very special” settings such as one that simulates a LA-2A, another “tuned”
for drums and a setting that works like a great engineer “riding” a fader. Then we extended the
PULTEC MEQ down to 20 Hz and up to 20 kHz so its not just a mid EQ anymore. To this we
added a new de-esser circuit and gave it a “Limiter” setting. This final de-esser / limiter is com-
pletely independent of the compressor and is post EQ.
We wanted the VOXBOX to be “Manley quality” and the first and only “analog combo” (other
than consoles) to make a serious entry into the major studios. We provided our style of balanced
inputs and outputs and used fewer but better parts. It only required five Manley audio transformers,
six multi-tapped inductors, two expensive Multi-Caps, four low noise graded tubes, four Vactrol
opto-isolators, three regulated power supplies, six Bournes conductive plastic pots & seven Grayhill
gold contact rotary switches. A few of these items are likely to cost more than other manufacturer’s
total parts. With all these serious transformers we even provided ways to go transformerless,the
minimalist and purist way to go. We went to great lengths to eliminate typical clicks and pops from
switches. The compressor and limiter can be switched in while recording and the change happens
smoothly. We added auto-mute circuitry to eliminate the turn-on & turn-off thump and regulated all
the power supplies. Many of these developments have since been incorporated into revisions of our
other pro products.
While we were designing the VOXBOX we couldn’t help but notice how well it would work on
other instruments besides voice. There were some great settings for drums (unusual), bass, guitar
and keys. So don’t just use it for voice - you can use it everyday and in any situation regardless of
how well equipped the studio may be. The name “VOXBOX” represents only the beginning and
the most obvious application.
Please take a few moments to read through this manual carefully as it contains information essential
to proper operation of this unit and we scattered little hints all over. Thank you again, and please
enjoy!
GENERAL NOTES
LOCATION & VENTILATION
The Manley VOXBOX must be installed in a stable location with ample ventilation. It is recom-
mended, if this unit is rack mounted, that you allow enough clearance on the top and bottom of the
unit such that a constant flow of air can move through the ventilation holes.
WATER & MOISTURE
As with any electrical equipment, this equipment should not be used near water or moisture.
SERVICING
The user should not attempt to service this unit beyond that described in the owner’s manual.
Refer all servicing to your dealer or Manley Laboratories.
3