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The MA850 is the third generation of an amplifier with
legendary reliability. Eight and twelve channel amplifiers have been built
by Knolll Systems in Canada for over 10 years. The MA850 heraldes a new
era in multi-channel, high-quality, affordable power amplifiers. The MA850
is designed to meet the amplifier needs of custom installed multi-zone
systems where high quality sound is a specific requirement.
Extras such as the external voltage trigger that can turn
the MA850 on and off, gold input connectors, individual level
or gain controls and channel link give the MA850 exceptional value when
installed in large complex systems. Except for the power switch all controls
are rear mounted.
Cost and size efficiency. The MA850 consists of a total
of 8 power amplifiers in one 3-1/2" high enclosure (two rack spaces).
Each power amplifier channel can deliver 50 watts RMS with peaks of 100
watts. Because of its unique design the MA850 delivers exceptional value.
Automatic protection circuitry. Each MA850 channel is
individually and fully protected against low impedance, overheating, overloading,
overvoltage and undervoltage. The protection circuitry automatically restores
the amplifier channel as soon as its parameter returns to the safe operating
area.
Individual level or gain adjustment. Each channel features
an input level or gain adjustment pot to precisely adjust each channel
for source and speaker sensitivity variations. The gain adjustments are
on the rear of the MA850 as installers normally set the gain.
External power on/off. The MA850 can be turned off and
on by external controllers. To activate the external or remote on/off
a DC 12 volt current is applied to the trigger jack (MA850 power switch
is in the off position for external power control.
Channel link. Channel link allows the installer to link
any or all of stereo channels two through six to channel one (left and
right) without using Y cords or external adaptors. In certain applications
this feature reduces installation time, costs and wire "clutter".
MA850 with internal fan. The MA850 features an even quieter
internal fan to increase the long term power
output capability of the MA850.
Specifications:
| Inputs |
8 Gold RCA jacks with adjustable gain |
| Input impedance |
50k ohms |
| Outputs |
detachable 4 position plugs (fits 12 g wire) |
| Output power |
50 watts RMS per channel (8 ohms) |
| Peak output power |
100 watts per channel (8 ohms) |
| Ideal impedance |
4 - 8 ohms |
| 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 |
650 watts at 117 VAC or 230VAC |
| Weight |
20 lbs (9 kg) |
Note: Specifications subject to change
without notice.
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