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MediaLinQ
™
cable to assure optimum sound reproduction.
Small gauge or inferior quality wire will degrade imaging,
diminish bass reproduction, and add a generally congested
quality to music. Always check local building codes before
installing wire in walls or ceilings.
Wires may be terminated with banana plugs for convenience if
connections will be changed frequently. Any connector should
be gold plated to prevent oxidation, which degrades sound
quality. The binding posts on the Sonamp® 1230 also accept
twisted bare wire ends through the 45º opening in their center
shafts. Do not overtighten shafts. Tinning the bare copper wire
is recommended.As an option, use contact enhancer on mating
surfaces of connections to retard oxidation and enhance signal
flow.Do not strip more than 1/2”of the jacket from speaker wires.
Always provide sufficient slack in wires to avoid tension or
accidental disconnection. Always contain any excess wire to
prevent tripping hazards.
Source Connection
Always use quality high fidelity interconnect cables such as
Sonance Silver MediaLinQ OFC Interconnects. If source
components are more than 20 feet from the amplifier, use the
LS1 and LR1 balanced line-level sender and receiver to avoid
signal degradation (As shown in Figure 6).
Plug source components (receiver, preamp, page signal) to the
LINE IN bus inputs at the top center of the amplifier.
Plug dedicated sources (zone output, page signal, video game,
or electronic doorbell) into the DIR (direct) channel inputs if
desired.
Plug downstream amplifiers to the non-buffered LINE OUT
bus outputs at the bottom center of the amplifier.
Source Settings
The fourplex DIP switches of the Sonamp® 1230 provides the
most flexible configuration options of any multichannel ampli-
fier. Settings are changed by moving the switches from (ON) to
(OFF):
L Assign to master left channel source
R Assign to master right channel source
L + R Mono reproduction of source
AUX Assign to AUX channel source
DIR Select dedicated channel input.
Note: It is possible to assign one or all switches as needed (L+R+AUX,
where AUX is the page input for a hallway or waiting room with paging.
Volume Control
The individual channel volume controls are useful to
balance the desired sound levels for various zones, to balance
output from right and left channels to compensate for room
characteristics such as size and ceiling height.Also,by reducing
the Sonamp volume control settings, you compel the source
preamp or receiver volume control to operate in the middle
of its range. do not set the level controls higher than the
maximum level desired. Place tape over the VC hole to prevent
tampering.
Power Trigger Controls
The Sonamp® 1230 may be automatically activated by an input
signal, low voltage trigger, or manual pushbutton. It also
provides a 12 volt DC output to trigger other components.
Auto-On Control
To use the Auto-On feature,turn the main power switch ON and
slide the TRIGGER switch on the rear panel to the UP
position. Use the SENSITIVITY control to set the minimum
signal level that will activate the amplifier. In this mode, the
amplifier will automatically turn off after 8 minutes of no input
signal at any of the 12 channel inputs. The Auto-On mode dis-
ables the other two triggering modes.
Voltage Control
When the TRIGGER switch is set to EXTERNAL VOLTAGE
(the center position) and the main power switch (on the front
panel) is set to ON, the amplifier will be activated by the
presence of AC or DC voltage, from 5 to 24 volts, at the
INPUT connector. The EXTERNAL VOLTAGE mode disables
the other two triggering modes. (DO NOT CONNECT TO
120VAC LINE VOLTAGE)
Bypass
If the TRIGGER switch is set to BYPASS (the bottom position)
and the main power switch (on the front panel) is set to ON,the
amplifier will always be active. The BYPASS mode disables the
other two triggering modes.
Ground lift
The GROUND LIFT switch breaks ground loops that can occur
between source equipment and amplifiers. Set the GROUND
LIFT switch to OFF for most applications. When the Sonamp
1230 is to be used in an equipment rack,set the GROUND LIFT
switch in the ON position. This will isolate the audio circuitry
from the chassis. Thus, the chassis need not be isolated from
the equipment rack with insulator washers.
Status LEDs
AC ON LED – This red LED indicates that the AC power line
cord is plugged into a live AC outlet. If the main AC line fuse
opens, this LED goes out.The main power switch setting does
not impact this LED.
ACTIVE LED – This green LED indicates that the amplifier
has been activated via one of the three methods described previously.
PROTECTION LEDs – These amber LED’s light during a fault
condition, one LED for each pair of channels. If one of the
Sonamp 1230’s protection circuits is triggered, the LED will
turn on.If a channel pair encounters a short-circuit event or an
extremely low impedance, the respective LEDs will light (1&2,
3&4,5&6,7&8,9&10, 11&12).All other channel pairs are unaf-
fected.If the heat sink temperature is exceeded because of poor
air circulation or high ambient temperature, a cutoff switch
attached to left and right channels will activate.Each bank
(1&2, 3&4, 5&6 or 7&8, 9&10, 11&12)of a Protect LEDs will
then light to signify a fault. If amplifiers are in Bridged mode,
the Protection Circuitry will sense a short circuit across both
positive speaker terminals and also positive to negative speak-
er terminal.