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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 of speakers you use, 
personal preferences, along with other factors. 
 
Regardless of the brand or type of speaker wire chosen, we suggest that you use a 

wire constructed of fine, multi-strand copper with a gauge of 16 or less (the lower 
the number, the thicker the cable). Wire with a gauge of 16 may be used for short 
runs of less than 12 feet. We do not recommend that you use any wires with an AWG 
equivalent of 18 or higher due to the power loss and degradation in performance. 

 
To connect the amplifiers to your speakers, a removable plug with screws is provided 
for each stereo channel output. Strip approximately 1/4 inch of insulation from the 
end of each wire and carefully twist the strands of each conductor together. Be sure 

not to cut the individual strands or twist them off. All strands must be used for 
optimal performance. Insert the wire into the plug and screw the screws very tight. 
Inspect that no wire “hairs” that can short circuit are not in the plug. 
 

Correct polarity connections are important to maintain proper speaker phasing. 
When speaker phasing is correct, all speakers move in and out at the same time 
preserving the imaging of the program material. Out-of-phase connections mean 
that some turn off, check your speakers to verify that they are operating properly. If 
all other potential sources of trouble check out properly, contact Knoll for further 

assistance. 
 
Run the cables to speaker locations. Do not coil any excess cable, as this may 
become an inductor that creates frequency response variations in your system. 

Lastly, connect the wires to the speakers, again being aware of proper polarity. 
Remember to connect the negative, or black wire, to the matching terminal on the 
speaker. The positive, or red wire should be connected to the matching terminal on 
the speaker. 

 
 

Note: While most speaker manufacturers follow industry convention of using red 
terminals for positive connections and black terminals for negative, some 
manufacturers may vary from this configuration. To ensure proper phase 

connections, and optimal performance, consult the identification plate on our speaker 
terminals, or the speaker’s manual to verify polarity. Contact the speaker’s 
manufacturer if you do not know the polarity of your speakers. 

 

 
 
 
 
 
 

Summary of Contents for Eco-System GRS44

Page 1: ...GRS44 8 Channel Eco System Controller Amplifier Installation Instructions v1 0...

Page 2: ...Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects...

Page 3: ...between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician fo...

Page 4: ...tion volume level bass and treble is made using RS232 commands Rooms can have different source selections volumes etc Four internal 80 position stereo volume controls GRS44 consists of a total of 8 po...

Page 5: ...stack other components on top of your amplifier Connecting your amplifier When making connections between any source components and the amplifier or when making connections to any speaker be certain t...

Page 6: ...m off All strands must be used for optimal performance Insert the wire into the plug and screw the screws very tight Inspect that no wire hairs that can short circuit are not in the plug Correct polar...

Page 7: ...cases a read request followed by a or a write request followed by 0 2 ASCII digits A read command will return the current setting and write command will change the setting Read request format nAA whe...

Page 8: ...ite only Note 1 Bass adjustment b 1 4 0 F write only Note 2 Treble adjustment t 1 4 0 F write only Note 2 Display treble b 1 4 read only Display bass t 1 4 read only Note1 Volume up or down requests i...

Page 9: ...ample of what the responses may look like Function Command Response Window On Off 1on Zone 1 on Select Input 1sl3 Zone 1 input 3 set Set Volume 1vl50 Zone 1 volume level 50 Set Bass 1baf Zone 1 Bass s...

Page 10: ...e or more channels Check input connections No audio from one or more Speakers are not connected properly Check speaker Channels connections at amp and speaker Audio levels differ from sources Improper...

Page 11: ...AND EXCLUSION Knoll shall have no further obligation under the foregoing limited warranty if the Product has been damaged due to abuse misuse neglect accident unusual physical or electrical stress un...

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