Warranty
Knoll Systems warrants MA1250 amplifiers sold in the USA and Canada by authorized Knoll dealers to be free of defects in materials and workmanship. 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 ohms |
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| Outputs |
| detachable plug |
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| Output power |
| 50 watts RMS per channel (8 ohms) |
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| Peak output power |
| 100 watts per channel (8 ohms) |
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| Ideal impedance |
| 4 - 8 ohms |
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| Frequency response |
| 10 Hz - 40 kHz +/- 1dB (1w) |
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| S/N ratio |
| over 105 dB A weighted (50 watts) |
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| THD distortion |
| less than 0.1% 20 Hz to 20 kHz |
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| IMD distortion |
| less than 0.01% 60 Hz 7 kHz 4:1 (SMPTE) |
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| Trigger control |
| 12 VDC 35mA on 3.5mm mono jack |
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| Dimensions |
| 17" x 3.5" x 11.5" (432 x 89 x 292mm) |
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| Fan Noise |
| quiet 26 dBA |
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| Power |
| 750 watts at 117 VAC or 230 VAC |
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| Weight |
| 21 lbs (9.5 kg) |
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Note: Specifications subject to change without notice.
Knoll Systems
145 Tyee Drive Point Roberts, WA 98281
12140 Horseshoe Way, Richmond, BC V7A 4V5 Tel: (604) 272 4555, fax (604) 272 5595
Made in Canada
MA1250 Amplifier
12 Channel Amplifier
Installation Instructions v1.2
Warning: To be installed and/or used in accordance with appropriate electrical codes and regulations.
Description: The MA1250 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 50 watts per channels at 8 ohms, the MA1250 packs some serious punch. Each channel has a gain control. The MA1250 can be turned on and off via the front panel power switch or via the 12 VDC trigger. MA1250 channels
Key Features:
1.Size efficiency. The MA1250 consists of a total of 12 power amplifiers in one
2.Automatic protection circuitry. Each MA1250 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.
3.Individual input gain adjustment. Each channel features an input gain adjustment pot to adjust each channel for gain and speaker sensitivity variations. The gain adjustments are on the rear of the MA1250 so installers normally set the gain.
4.External power on/off. The MA1250 can be turned off and on by external controllers. To activate external power on, apply a 12 VDC current to the trigger jack (the MA1250 power switch is in the off position for external power control).
5.Stackable 17" chassis.
6.Link Feature. Certain installations require that some or all of the stereo channels play the same content. Instead of using Y cords, "link" cascades any or all of channels
