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GRS44
8 Channel Eco-Sy ste m™
Controller-Amplifier
Installation Instructions v1.1
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2 Important Safety Instructions: 1) Read these instructions. 2) Keep these instructions. 3) Read all warnings. 4) Follow all instructions. 5) Do not use this apparatus near water. 6) Clean only with dry cloth. 7) Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. 8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9) Do not defeat the safety p
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3 FCC Warning Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no g
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4 Introduction: Thank you for your purchase of a Knoll GRS44 8 channel controller amplifier and congratulations on your choice. The GRS44 features four deluxe digital volume controlled stereo amplifiers with individual four source selection. This is Knoll's fourth generation of multi-channel, high- quality power amplifiers. The GRS44 is designed to meet the amplifier needs of custom installed multi-zone systems where high quality sound is a specific requirement. Each of the four zones or
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5 Unpacking: The carton and packing materials used in shipping your new amplifier were specially designed to protect it from the shock and vibration of shipping. We suggest that you save the carton and packing materials to use if you move, or if the unit ever needs to be shipped back to us for any reason. Should you discover that your amplifier has been damaged during shipping, please contact your dealer or Knoll immediately and request the name of the carrier so a written claim can be
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6 Speaker connections The GRS44 has four stereo 30 watts per channel amplified outputs. Channel 1 also has line level outputs to connect to larger powered amplifiers. To ensure that the high quality signals produced by your amplifier are carried to your speakers without loss of clarity or resolution, Knoll advises that you use high-quality speaker wire. Many brands of wire are available — the choice may be influenced by the distance between your speakers and the amplifier, the type
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7 RS232 Connection The RS232 connection is used to control the GRS44 by an external controller or computer and can work with our without keypads. The GRS44 connects to the RS232 controller with a 9-pin db9 connector. The programming reference follows. 1.0 Terminal Settings To control the GRS44 amplifier via other control systems, connect a RS-232 cable to the serial control connector on the rear of the GRS44 and set your computer’s or control unit port settings to match the followi
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8 Supported Commands Command Summary # = numerical zone or amplifier channel value $$ = second numerical value (may be one or two digits) Function Command Range Read/Write Remarks Version (vr?) none read only Reset (rx) none write only 1 second Channel On (#on) 1-4 write only Channel Off (#of) 1-4 write only Mute (#mu) 1-4 write only Un-mute (#um) 1-4 write only Note 3 Mute All (amu) none write only Note 3 Un-mute All (aum) none writ
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9 Un-mute All (aum) "All channels un-muted" Volume Request (#vl?) "Zone # volume level = $$" Volume Set (#vl$$) "Zone # volume level set" Volume All (avl$$) "All volume levels successfully changed" Input Set (#sl$) "Zone # input set" Input Request (#sl?) "Zone # is currently using input channel $” Input Select All (asl$) "All zones set to source $" All Channels Off (aof) "All zones turned off" All Channels On (aon) “All zone
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10 Troubleshooting Your Knoll amplifier is designed from trouble-free operation. If you follow the instructions in this manual, you should enjoy many years of high-quality listening enjoyment. However, as with any sophisticated device, there may be occasional problems upon initial installation, or during the life of the amp. The items on the list below are a brief guide to the minor problems that you may be able to correct yourself. If these solutions do not help, or if the problem pers
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11 Limited Warranty Knoll Systems, Inc. (“Knoll”) warrants that each GRS44 (“the Product”) sold hereunder will conform to and function in accordance with the written specifications of Knoll. Said limited warranty shall apply only to the first person or entity that purchases the Product for personal or business use and not for the purpose of distribution or resale. Said warranty shall continue for a period of three years from the date of such purchase. Knoll does not warrant that the P
