LL-One
Line Level
A/B Switching Module
OWNER’S MANUAL
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SpeakerCraft • 940 Columbia Ave., Riverside, CA 92507 • Phone 1-800-448-0976 • Fax 888-599-9059
www.speakercraft.com
LIMITED 5-YEAR WARRANTY
SpeakerCraft warrants this product to be free of defects in materials or
workmanship. This extends for five years from the date of purchase
by the original consumer. Any products returned to SpeakerCraft and
found to be defective by SpeakerCraft within the warranty period
will be repaired or re placed, at SpeakerCraft’s option, at no charge.
SpeakerCraft will not be responsible for the actual cost of in stal la tion or
removal of the product, nor for any incidental or con se quen tial dam-
ages. Some states do not allow the exclusion or limitation of incidental
or consequential damages, so the above limitation may not apply to
you. This warranty gives you specific legal rights. You may have ad di-
tion al legal rights that vary from state to state.
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INSTALLATION INSTRUCTIONS
LL-One Line Level
A/B Switching Module
The LL-One is an audio line-level stereo A/B switcher. It allows
one line level stereo output to be switched automatically
between two line level stereo inputs, replacing manually
operated A/B switches. Exclusive microprocessor controlled
system ensures precision timing and switching accuracy. Status
LEDs indicate which amplifier is active and a status output jack
permits triggering of local devices.
SPECIFICATIONS
Delay Range, uPC Controlled …………………………… 0.5 Sec. to 10 Min.
Sensitivity Range ………………………………………………10mV to 100mV
Relay Contact Rating ……………………………………………….. 2 A @ 30V
B Status Output Voltage …………………………………… 12V DC @ 10 mA
…………………………….… 9V DC @ 100 mA Max.
Power Requirements ………………………………………… 12V DC @ 75 mA
Power Jack …………………………………….… 2.1mm, center pole positive
Diagnostics …………………………………… See
Connection Notes
section
Dimensions
4-5/8" (117mm) L x 3-3/8" (85mm) W x 1.05" (26.7mm) H
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Fig. 1
The LL-One
LL-One A/B Switching Module
FEATURE DESCRIPTIONS
(Refer to
Fig. 1
)
1.
Input A
Gold Plated Line Level
L
&
LL
R
RCA jacks.
2.
Input B
Gold Plated Line Level
L
&
R
RCA jacks.
3. Octal
DELAY (B to A)
switch provides precision delay set
tings from 0.5 seconds to 10 minutes to handle virtually
any music energy interval without false switching.
4.
Sense Level
adjustment accommodates a wide range of
music level conditions from the line level input connected
to the sensed Input B, for best switching threshold.
5. Mounting holes. For use with Included screws.
6.
B Status
3.5mm output jack provides 12V DC (100mA Max.)
to trigger local devices (i.e. lighting, etc.), where desired,
when line level audio is received at Input B.
7.
B Status
LED lights when line level audio is received at
Input B. Audio signal then plays through to amplifier
connected at the Output jacks, item 8.
8.
Output
Gold Plated Line Level
Output
Output
L
&
LL
R
RCA jacks.
9.
A Status
LED lights when there is no audio signal present
at Input B. The audio signal at Input A then plays through to
an amplifier connected at the Output jacks, item 8.
10.
12V DC IN
is a 2.1mm Power Jack for powering the LL-
One. It permits use of standard SpeakerCraft 12 Volt DC
Power Supplies (the PS-1.0 is recommended).