Warranty
Knoll Systems warrants MX1255 amplifiers sold in the USA and Canada by
authorized Knoll dealers to be free of defects in materials and manufacturing.
This warranty extends for three full years from the date of purchase by the
original consumer. Any products returned to Knoll Systems and found to be
defective by Knoll Systems within the warranty period will be repaired or
replaced at Knoll Systems decision, at no charge. Knoll Systems will not be
responsible for the actual cost of installation or removal of the product, nor for
any incidental or consequential damages. 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
additional legal rights that vary from state to state.
Specifications:
Inputs
12 Gold RCA jacks with adjustable gain
Input impedance
50k Ω
Outputs
detachable plug
Output power
55 watts RMS per channel (8 Ω)
Bridged Power (channel 6)
180 watts RMS (8 Ω only)
Peak output power
100 watts per channel (8 Ω)
Ideal impedance
4 - 8 Ω
Frequency response
10 Hz - 40 kHz +/- 1dB (1w)
S/N ratio
over 105 dB A weighted (50 watts)
THD distortion
less than 0.1% 20 Hz to 20 kHz
IMD distortion
less than 0.01% 60 Hz 7 kHz 4:1
(SMPTE)
Trigger control
12 VDC 35mA on 3.5mm mono jack
Dimensions
17" x 3.5" x 11.5" (432 x 89 x 292mm)
Fan Noise
quiet 26 dBA
Power
750 watts at 117 VAC or 230 VAC
Weight
21 lbs (9.5 kg)
Note:
Specifications subject to change without notice.
Knoll Systems
145 Tyee Drive Point Roberts, WA 98281
14-7163 Vantage Way, Delta BC V4G 1N1
Tel: (604) 940 1689, fax (855) 734 3363
Made in Canada/Fabrique au Canada
MX1255 Amplifier
12 Channel Amplifier
Installation Instructions v7.3
Warning
: To be installed and/or used in accordance with appropriate
electrical codes and regulations.
Description:
The MX1255 is a member of the long line of Knoll multi-
channel amplifiers. Designed primarily for the custom install industry, it
is used to power speakers with different or similar sources in multiple
rooms. With 12 channels rated at 55 watts per channels at 8 Ω, the
MX1255 packs some serious punch. Each channel has a gain control.
The MX1255 can be turned on and off via the front panel power switch
or via the 12 VDC trigger. MX1255 channels 2-6 can be linked to
channel 1 individually using the link switches. MX1255 amplifiers
designed to meet the amplifier needs of custom installed systems
where high-quality sound is a specific requirement.
Key Features:
1. Size efficiency.
The MX1255 consists of a total of 12 power
amplifiers in one 3-1/2” high enclosure. Each power amplifier
channel can deliver 55 watts RMS into an 8-Ω load.
2. Automatic protection circuitry.
Each MX1255 channel is
individually and fully protected against low impedance,
overheating, overloading, over voltage and under voltage. The
protection circuitry automatically restores the amplifier channel
as soon as its parameter returns to the safe operating area.
3. Individual input gain adjustment.
Each channel features
an input gain adjustment pot to adjust each channel for gain
and speaker sensitivity variations.
4. External power on/off.
The MX1255 can be turned off and
on by external controllers via its 12 VDC trigger jack.
5. Stackable 17" chassis.
19” rack ears available.
6. Link Feature.
Certain installations require that some or all of
the stereo channels play the same content. Instead of using Y
cords, the Knoll "link" cascades any or all of channels 2-6 to
channel 1 (L/R).
7. Bridgeable.
Channel 6 can be bridged giving 180 watts RMS
into an 8 Ω load for use with subwoofers and speakers that need
more power.
