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AUDIO OUTPUT CABLE WIRING
HI-Z
Attenuator Audio Out Wiring
LOW Z TRS BALANCED OUTPUT
LOW Z UNBALNCED 1/4”
MONO CONNECTOR
LOW Z Single channel Input
to Computer Sound Card
HI Z TRS BALANCED OUTPUT
LOW-Z
LOW-Z
LOW-Z
HI-Z
LOW-Z
- Audio
- Audio
- Audio
- Audio
+ Audio
+ Audio
+ Audio
+ Audio
GND
GND
GND
GND
Shield of Cable
Shield of Cable
Shield of Cable
Shield of Cable
LOW Z XLR BALANCED OUTPUT
HI-Z XLR BALANCED OUTPUT
- Audio
- Audio
+ Audio
+ HI-Z Audio
GND
GND
Shield of Cable
Shield of Cable
1
2
3
1
2
3
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INTRODUCTION
i
Box by W2IHY
i
Box is a variable audio attenuator designed to
be a versatile accessory for the serious amateur.
i
Box can be used to not only provide the proper
audio levels and impedance matching between
pieces of equipment in your audio chain or to your
amateur radio equipment but it may also be used to
eliminate ground loops that usually show up in the
form of hum.
i
Box can also be used to provide RF
isolation between components.
i
Box achieves its
outstanding isolation through use of a high quality
audio transformer and filter networks.
i
Box’s input
impedance is 600 ohms. The output impedance of the
i
Box may be selected to be either 600 ohms or 50K
ohms. This means the
i
Box can be connected to
modern and vintage radio equipment as well as
between audio rack components.
i
Box was designed at the request of amateurs who
were using studio audio equipment and needed a
more versatile way to level match, RF isolate, audio
isolate, PTT control and impedance match audio and
transmitting components..
We feel so confident that you will be delighted with the
i
Box we offer a 30 day money back , no questions
asked, guarantee. The
i
Box represents affordable
audio technology designed for amateur radio use.
