Cable Type; Rf Interference; Distribution Wiring; Considerations For New Construction Installations - AMX Distributed Audio Controllers Delta Series Operation And Reference Manual

Wiring and Connections

Cable Type

The Delta Controller is cabled using standard 4-conductor speaker cable originating at the Delta control
unit passing through the keypad and terminating at the speaker location. Matrix Audio Designs generally
recommends using a bundled 4 conductor 16 gauge stranded copper wire in a single continuous run. The
keypads also function with Cat 5 or basically any 2 conductor wire configuration that is not used for
other devices.

RF Interference

Shielded cable is generally not required for audio installations. Although the Delta Controller does
generate very low radio frequency emissions, it uses a digital signaling path during command entry.
There are normally no ongoing data communications in the circuit path. Communications only occur at
the time a command is issued from a zone. However many other systems do use microprocessor systems
where the cabling may be in close proximity such as telephone and security systems, and it is possible
for different systems to interfere with each other. If you face an installation where your cable runs are in
parallel to these types of systems you may consider shielded cable to the keypads. In this case ground the
drain wire by connecting it to the chassis of the Delta Controller.

Distribution Wiring

In general, wiring is installed in a single continuous run between the Delta Controller, the keypad and the
speaker location. Other cable routing options such as a home run to a common wiring distribution point,
integration with home automation systems, or split zone applications can be significantly different than
the general information presented here. These applications are left to the installer's discretion and
experience, which is why Matrix Audio recommends installation by a professional. Examples of
common wiring options can be found in the "Controller Connections" section of this manual.

Considerations for New Construction Installations

It's generally accepted to run the 2 and 4 conductor speaker cables inside walls, in the attic and between
the joists in the basement or crawl space. When installing cables within walls, drill the holes in the
middle of the studs to avoid having them damaged by screws or nails that could penetrate the cable. Use
metal nail guard plates where necessary to protect the cable from future construction damage or from
something like nails/screws that are installed to hang future pictures or shelving. When running cables in
the attic or crawl space, run them in such a way that they will be out of harm, where they will not be
stepped on, snagged, punctured, or could pose a safety hazard.
Do not run cable thru the return air path that utilizes the wall or ceiling space as the plenum.

Securing the Cables

We recommend using electrical cable straps to keep the installation neat and secure. We do not
recommend stapling the cables as a single misplaced staple can cause a short that causes trouble during
operations and set-up. Do not leave the wires lying in the dirt under the crawl space.
Neatness counts in a professional installation.

Keypad "Rough In" Locations

The keypad device itself will fit in a standard electrical box or new construction plate and you should
install 1 or 2 gang (as required) standard electrical boxes to accommodate them before the drywall has
been put into place. Keep in mind that because these are low voltage applications, plastic electrical boxes
are generally adequate for the keypad, but check local building code requirements to be sure. The high
voltage electricians on the job site will know which electrical box is appropriate and within code.These
emissions have been accommodated for in design and conform to RF emission standards.
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Delta Series Audio Controllers