SpeakerCraft LL-One User manual
LL-One
Line Level
A/B Switching Module
OWNER’S MANUAL
LIT02001
CT
L
02001
SpeakerCraft®
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
&
L & L
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 Gold Plated Line Level Output
L
&
L & L
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).
Fig. 2
shows typical system connections for the LL-One.
SYSTEM CONNECTIONS
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Sense Level and Delay (B to A) Adjustments:
These need to be set carefully in order to achieve consistent results. Proceed as follows:
1. Set the
Sense Level
by first rotating it to the full
Lo
(CCW) position and the
Delay
(B to A)
to the
0
position.
If the
Tuner/Preamp B
does not switch ON with audio signal playing, rotate the
Sense Level
CW a little at a time until it does.
Usually, setting the
Sense Level
at mid rotation will work well.
The
Sense Level
range is 100mV at full
Lo
(CCW) and 10mV at full
Hi
(CW).
2. Next, rotate the
Delay (B to A)
CW until you find a place where the
Tuner/Preamp B
does not shut OFF and ON too frequently
with low sound or music levels or during track and disc changes on CDs, DVDs, etc.
Since the
Delay
range is 0.5 seconds at the 0 position and up to 10 minutes at the 7position, you should be able to find a good
Delay range is 0.5 seconds at the 0 position and up to 10 minutes at the 7position, you should be able to find a good Delay
compromise between too frequent shut Offs and too long a time for the music to turn Off after the program material ends.
Usually, a setting at
3
(20 seconds) or
4
(50 seconds) will work well."
B Status (out)
This output is provided so that external devices, such as drape pulls, lighting, additional amplifier, etc., can be triggered at the same
time as the B Input is triggered. Just be sure that the triggered device will operate with a 12V DC trigger voltage and does not
demand more than 100 mA of current draw. Actually, the 12V B Status output voltage will drop to about 9V at the max. current
of 100 mA.
Connection Notes:
1. Make connections using
Fig. 2
as a guide.
2. When the power supply is first plugged into the LL-One , the
unit will go through a self diagnostic check as follows:
• If the
Delay
switch is set to
Delay switch is set to Delay
0
(.5 Sec.) the unit's relay and B
Status LED will go ON/Off once.
• If set to
1
(2 Sec.), the relay and B Status LED will go
ON/Off once, pause, then rapidly go ON/OFF
1
more time.
• If set to
2
(5 Sec.), the relay and B Status LED will go
ON/Off once, pause, then rapidly go ON/OFF
2
more times.
• If set to
3
(20 Sec.), the relay and B Status LED will go
ON/Off once, pause, then rapidly go ON/OFF
3
more times.
This same type of diagnostic action will repeat for each
setting up to position
7
.
Note:
The power supply must be removed and reinserted each
time the
Delay
switch is changed for the above to be true.
Delay switch is changed for the above to be true.Delay
3.
Tuner/Preamp A
, for instance, could be a line level feed for
Tuner/Preamp A, for instance, could be a line level feed for Tuner/Preamp A
whole house music.
Tuner/Preamp B
could be a local room
audio source. The Power Amp and Speakers could be located
in the local room as part of a whole house music system.
4.
The system would operate as follows: When the
Tuner/Preamp
B
is Off or turned fully down, music from
Tuner/Preamp A
Tuner/Preamp A Tuner/Preamp A
would play through the LL-One to the Power Amp and
Speakers. When
Tuner/Preamp B
is turned On, or turned up,
the line level audio from
Tuner/Preamp B
would be sensed
by the LL-One at
Input B
and automatically switch so that
Tuner/Preamp B
would play through to the Power Amp and
Speakers. When the audio signal stops from the
Tuner/Preamp
B
,
for any reason, the LL-One will switch back to
Tuner/
Preamp A
after a timed interval set by the
Delay
(B to A)
adjustment.
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