This Product is no longer for sale :(
$75.20 (NOTE: Only 1 APOX-1 is required for both Left and Right Volume Control
(fully differential and/or single ended))
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The volume selection boards:
APOX-1: A 255 position shunt type non-constant
impedance volume controller
This board handles two fully differential channels (ex. L+,L-,LGND and
R+,R-,RGND) It can also be used with either single ended, or differential
inputs. It has full mute capability. This board also switches between single
ended and differential inputs using a setup procedure in the APOX-IR1.
A lookup table in the microcontroller linearizes the output. WARNING: This board
does not come with resistors, and they must be ordered seperately.
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APOX-1 Resistor Kits:
This Product is no longer for sale :(
APOX-1 Shunt Ladder kit $48.00
If you'd like to purchase your own resistors, there is nice calculator here.
Series Attenuator Calculator
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This Product is no longer for sale :(
$85.10 (WARNING: You need two boards for a fully differential system. But only
1 board if you have a single ended system)
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APOX-2:
A fully differential 24 position constant impedance series volume controller
(Note: The APOX-2 can be used with multi-tap transformers in place of the
resistors) The kit comes with raw board, and all components with exception of
the resistors in the resistor ladder. Assembly is required. two identical rows
of 23 resistors is required.
(46 total See below for resistor pricing.)
Remember: If you have a fully differential system, you will need two of these
boards. If you only use RCA style connectors then you need only 1 board.
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APOX-2 Resistor Kits:
This Product is no longer for sale :(
APOX-2 Resistor Ladder kit $82.90 (WARNING: You may need two of these kits if
you ordered two APOX-2 boards)
If you would like to purchase your own resistors, the values are available here
in this Excel spreadhseet resistor
table of available values. WARNING: If you buy your own resistors, the
values must all be scaled to the values given in the spreadsheet, or else you
board may not work properly.
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This Product is no longer for sale :(
$65.12 per board
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The APOX-SHM is a new
APOX-1 like board, but only handles a single channel. But the single channel
volume control allows for balance control between channels.
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APOX-SHM Resistor Kits:
This Product is no longer for sale :(
APOX-SHM Shunt Ladder kit $24.00
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