System Signal Connections - BLUE SKY MediaDesk 5.1 Owner's Manual

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System Signal

Connections

Below are some basic outlines of ways someone may interface MediaDesk with

their audio system. These may or may not apply to your specific application,

but they should be able to show the basic concept for most applications.

CABLE WIRING SPECIFICATIONS

Most users of the MediaDesk system will be using ready made

cables, however if you need to wire your own cables, follow the

wiring specifications below.

XLR INPUTS (ELECTRONICALLY BALANCED)

Figure 2: shows the XLR inputs being fed from the output of a

standard pro audio mixer. The XLR inputs can handle up to +24dBu

of signal level at the input and are compatible with most, if not

all professional gear. If your mixer has TRS outputs, you should

purchase TRS to XLR cables (found at most pro audio retailers) and

feed the XLR input. We recommend this because TRS outputs are

also balanced signals and you should use them with the XLR input

(as opposed to the RCA input) for the best performance.

RCA INPUTS

Figure 3: The RCA inputs on MediaDesk are compatible with a

myriad of consumer and computer audio gear, such as mixers,

CD players, audio pre-amps, surround pre-amps etc. Figure 3

shows another common application, the RCA inputs on MediaDesk

being fed by the output of a standard computer sound card. This

requires the use of an optional adaptor cable, to go from the 1/8"

stereo jack to two RCA outputs. These cables are available from

most electronic retailers, computer stores and pro audio dealers.

Consult the manual or help files that came with your sound card

for specific setup information. Please confirm that the software

settings are not constraining or limiting the response of the system

in any way (often an issue with laptop computer audio settings).

Speaker Level Outputs / SAT speaker level inputs

Figure 4: This drawing shows the proper way to insert bare wire

into the binding posts which are on the subwoofer outputs and

SAT inputs. When inserting bare wire, please make sure that

there are no strands protruding out that may create a short-circuit.

These binding posts are compatible with wire gauges up to

approximately 12 gauge.

A note about the LFE Channel / LFE Input

The LFE Channel was originally designed for film applications as

a way to extend the low frequency "head-room" (not frequency

response) of the playback system. This additional headroom was

created by adding +10dB of in-band gain to the LFE channel. This

channel is designed to be used when no additional LF headroom

is available in the other channels. As an example, you may use the

LFE channel to increase the dynamic low frequency content of a

movie that has many large explosions. It is important to note that

no "significant" audio should be sent exclusively to the LFE channel.

The reason for this is that if a Dolby Digital audio track is folded

down to 2-channels, the LFE channel will not be added to the fold-

down mix (all other channels will be added to the fold-down).

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System Signal Connections - BLUE SKY MediaDesk 5.1 Owner's Manual

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