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Overview: The SpeakerCraft Vital 1250 amplifier delivers the power and
fidelity needed to distribute music throughout your home. This amplifier
includes the necessary features needed for flexible, reliable custom
installation. Sophisticated design and superior internal components, result in
outstanding sound quality, performance, and long term reliability.
50W x 12Ch Amp: The SpeakerCraft Vital 1250 amplifier is rated at 50
watts x 12 channels (in 8Ω at 20-20kHz with
2-channels driven and 0.40% THD), or 75 watts x 12 channels (in 4Ω
at 1kHz with 2-channels driven and 0.50% THD).
Bridgeable: The power output of adjacent amplifier channels can be
combined to provide extra power when needed in certain locations & applications.
This is easily accomplished by flipping a single switch on the amplifier's
rear-panel. Bridged power rating of the amplifier is 170 watts x 6 channels (in
8Ω at 1kHz with 2-channels driven and 0.50%
Binding Posts: The SpeakerCraft Vital 1250 amplifier is fitted
with gold-plated, binding posts for each channel. The binding-post
terminals will accept bare-wire (up to 10AWG), pin-connectors,
and banana plugs (dual or single).
Flexible Input Selection: Each of the amplifier channels can
be assigned a variety of source inputs; a dedicated input can be assigned to each
channel or each channel can be configured to play common signals from the Bus
or Auxiliary inputs. This provides the flexibility needed in sophisticated
custom audio installation.
- Bus Input: The Main bus input (stereo RCA) allows outputs from
receivers, CD players, TVs or an stereo audio sources to be amplified across
all channels of the amplifier for easy multi-room applications.
- Aux Input: The Auxiliary input (stereo RCA) allows an additional
audio source to be played on any channels that are switched to AUX.
- Dedicated Channel Inputs: Individual channels inputs (mono RCA)
allow you to connect different audio sources to each channel of the
Note: When either a Bus or Aux input is selected, there is a switch on the
rear-panel used to direct the channel to play the left signal, the right signal, or a combined right and left signal
from that amplifier channel.
Bus & Aux Outputs: The Bus output (stereo RCA) allows the Bus input of
the amplifier to be sent to another amplifier in your system. The Auxiliary
output (stereo RCA) allows you to daisy-chain the amplifier's input to other
amplifiers in your system.
Channel Level Adjustment: Each channel has its own level adjustment.
This allows the loudness of each speaker to be perfectly matched to its location
and application and balance your system's sound.
Protection Circuitry: Each channel of the amplifier is individually
protected. If the advanced circuitry determines that a channel must be shut down
for protection (a rare occurrence) only the channel affected will be turned off,
while the other channels continue to play. Once conditions return to normal, the
affected channel will be turned back on and operate as normal.
Note: When the Protection LEDs (Red) on front of the amplifier are lit,
it is indicating either a fault in the wiring, the speaker, or the
amplifiers of that particular channel.
Power Modes: There are three ways to turn the amplifier on;
Constant, Trigger, or Audio Sense. This allows the amplifier to operate
seamlessly as part of a sophisticated custom installation. The 3-way power mode
switch is located on the amplifier's rear-panel.
- Constant: Select Constant mode when you wish to manually turn the
amplifier on and off by using the front mounted power button.
- Trigger: Use Trigger mode if you prefer the amplifier turn on
when it receives voltage (3-30V) from an external source and turn off once
that voltage has stopped. The voltage source must be connected to the
trigger input jack (3.5mm) on back of the amplifier.
- Audio Sense: Audio Sense mode turns on the amplifier when the
amp's main input receives an audio signal. Once the signal stops, the
amplifier waits 3 minutes and then turns itself off.
Trigger Output: A separate
output trigger (2.5mm) allows the amplifier to activate other components via a
Rack Mountable: The amplifier includes a set of rack ears for rack