Kustom KHS-6640 Owner's Manual - page 10
Master In/Out:
The master controller input will accept a seventh KHS6S controller. This controller will then become a master control for
the entire system. If Source 1 is selected on this controller, all zones will switch to Source 1.
If volume up is pressed, all zones will go up and visa versa volume down will lower all zones. If mute is pressed, any zones
active will be muted.
The Master Out jack can be connected to the Master In on a second KHS6640 to allow master control of 2 units (12
zones).
Individual rooms then can override this and return to a local zone mode. This way individual zones can be changed to suit
the listener in a particular zone.
Unit On:
When the On LED is lit, there is a +5v DC applied to these pins that can be used to control any equipment such as relays
or digital switches. This voltage is switched off when the Power button is out or the KHS6640 is in the sleep mode such
as with no sources playing.
Trig On:
By applying +5v to +12v DC to these pins, the KHS6640 can be temporarily awakened. If no sources are present, the
KHS6640 will return to the sleep mode when the voltage is removed.
Using Multiple KHS6640 Units:
Up to 3 KHS6640 units may be wired together to provide 18 zones of listening pleasure. First connect all sources into the
first KHS6640 and use the Source Outs to connect to the Source Ins on the second unit. Then use the Source Outs on
the second unit to connect into the Source Ins on the third unit. Next, using Y-adapters (2-1/8 plugs to 1- 1/8 jack), connect
all emitter outputs of the KHS6640 to proper source emitters. Lastly, any connections made to page/doorbell status connectors
must also be made to the other KHS6640s.
Adding More Audio Power to the KHS6640:
If you need more audio power in a zone, simply attach an RCA cable in between the Line Out jacks and the inputs of an
external power amplifier. This allows virtually unlimited volumes to be obtained. (Multiple outdoor speakers are a prime
example).
Section 4: Special Wiring Schemes:
The following connections are made to the KHS6640 via the 12 pin terminal block located on the back of the unit. Cat-5
wire or doorbell wire is perfectly suitable for all of these connections.
1. Page/ Doorbell Status:
Paging: The 6640 has two ways to allow external paging to be amplified through it. The jacks labeled Audio Input will
accept any audio signal and will mute the sources and play the page audio automatically. The page sensitivity and level
are adjustable via trim pots located inside the KHS6640 (see fig. 1, page 3). Additionally, there are two pins labeled Mute
Input. When a DC voltage (+5v to +12v) is applied to these pins the source audio will mute and remain muted until the
voltage is dropped. Using an external voltage for the page mute function will still allow an audio page to be amplified through
the system and may be advantageous when dealing with a noisy phone line (See diagram page 4).
Doorbell: The KHS6640 has two built-in and distinctly different doorbell sounds (ding and ding dong). Either doorbell can
be triggered by attaching wires from the houses doorbell transformer (switch side) to the terminals on the KHS6640 labeled
Doorbell A or B. Any voltage from 5v to 24v AC or DC will trigger the doorbell. This allows this feature to be used with
most types of existing doorbells. Doorbell volume can be adjusted via a trim pot located inside the KHS6640 (see fig. 2,
page 3). The paging and doorbell features can be further customized in each zone. You can disable the page/doorbell
feature in a zone by setting both slide switches on that zone board to Off. This might be of use in a nursery, for instance.
You can set a zone to only mute the sources, but not play the page or doorbell by setting Switch to On, but setting audio
to Off. Finally, you could set Switch to Off and set Audio to On. This would allow the page or doorbell audio to mix
with the source audio (see fig. 3, page 3).
Telephone Entry Systems:
The KHS6640 is well suited to be integrated into a telephone entry system. With these systems you can page from any
phone in the house through the KHS6640 system. You can also trigger the doorbell or mute the system in some or all zones.
Please consult their owners manuals for operation. In the case of the Panasonic phone entry system using the KX-T30865
Doorphone, you must use the KHSPDA-1 to supply the necessary voltage to cause the 6640s internal doorbell to chime.
(See Pages 4 and 5 for the wiring diagrams of the most popular models.)
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