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Xantech RAT 1 manual

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Table of contents for the manual

  • Page 1

     1 Speakers & Volume Controls RA T1 REMOTE AUTO TRANSFORMER The RAT1 is an infrared remote controlled stereo speaker volume control with impedance matching capability. It allows individual volume control of from one to 16 pair of stereo speakers from one stereo power amplifier, using one RAT1 for each stereo speaker pair. It is controlled wi[...]

  • Page 2

     2 2 A B C ADJ-OFF 1234 5678 GLOBAL Z-ADJ TREBLE VOL MUTE ON OFF E-FLAT LAST MAX-V TRIM OFF C-BAL BASS INPUT A RC68+ PROGRAMMER 80 48 10 90 01 00 C0 50 D0 41 40 A0 30 B0 21 20 E0 70 F0 61 60 88 18 98 09 08 A8 38 B8 29 28 E8 78 F8 69 68 C8 58 D8 49 E1 89 C9 A9 E9 71 19 59 39 79 F1 99 D9 B9 F9 3 4 5 1 RC68 PROGRAMMER / REMOTE CONTROL The RC68+ (an[...]

  • Page 3

     3 Speakers & Volume Controls WHEN USING 8 OHM SPEAKERS Number of Speaker Pairs Used S1 S1 1 2 3 4 5 6 7 8 9 10 1 1 12 13 14 15 16 S2 S2 S4 S4 S4 S4 S8 S8 S8 S8 S8 S8 S8 S8 S1 S2 S4 S4 S8 S8 S8 S8 Min. Amp. Impedance 4 Ohms 8 Ohms WHEN USING 4 OHM SPEAKERS Number of Speaker Pairs Used Min. Amp. Impedance S1 S2 1 2 3 4 5 6 7 8 S4 S4 S8 S8 S8 [...]

  • Page 4

     4 Procedure for Speakers Other Than 4 or 8 Ohms In this case, treat all speakers that are rated between 4 and 7 Ohms as 4 Ohm speakers, and use the charts accordingly. Similiarly, all speakers that are rated 8 Ohms or higher, treat as 8 Ohms speakers. Again, all speakers used in the system should be the same impedance (i.e. all 6 Ohms, all 7 Oh[...]

  • Page 5

     5 Speakers & Volume Controls 6. Multiply 1.14 by 8 (for the S8 setting) = 9.12 Ohms. 7. Next, calculate the overall paralleled impedance Z O . Since three paralleled groups are used in this example, the calculation is as follows: Z O = 1 ÷ [(1 ÷ 16) + (1 ÷ 16) + (1 ÷ 9.12)] = 4.26 Ohms. Since this yields more than 4 Ohms, the S8 setting[...]

  • Page 6

     6 If you wish to carry remotes that have the same codes from room-to-room, use a Dedicated IR Bus System as shown in Fig. 4 . 5. A 490-30 "Micro Link" IR Receiver plugs into the 789-44 for local control of the source equipment (i.e. equipment behind closed doors, etc.). 6. A "STATUS" system is included. This permits the powe[...]

  • Page 7

     7 Speakers & Volume Controls Fig. 3 A RAT1 System Using a Common IR Bus RAT1 12VDC +12 VDC GND STA TUS IR IN EMITTERS IR RCVR 789-44 CONNECTING BLOCK ® S8 S4 S2 S1 L+ L– R– R+ L+ L– R– R+ AMPLIFIER INPUT SPEAKER OUTPUT STA TUS POWER IR IN STAT US GND +12 VDC 12VDC RAT1 REMOTE AUTO TRANSFORMER S8 S4 S2 S1 L+ L– R– R+ L+ L– R?[...]

  • Page 8

     8 INSTALLATION – DEDICATED IR BUS SYSTEM Fig. 4 illustrates an installation where each remote room has a Dedicated IR Bus going to the RAT1 that controls it. The IR bus is not connected in common as it is in Fig. 3 . This eliminates the need for dedicated remotes, allowing you to carry the same remote(s) from room-to-room. It is configured as[...]

  • Page 9

     9 Speakers & Volume Controls Fig. 4 A RAT1 Dedicated IR Bus System RAT1 S8 S4 S2 S1 L+ L– R– R+ L+ L– R– R+ AMPLIFIER INPUT SPEAKER OUTPUT STA TUS POWER IR IN STA TUS GND +12 VDC 12VDC RAT1 REMOTE AUTO TRANSFORMER S8 S4 S2 S1 L+ L– R– R+ L+ L– R– R+ AMPLIFIER INPUT SPEAKER OUTPUT STA TUS POWER IR IN STA TUS GND +12 VDC 12VDC[...]

  • Page 10

     10 In some cases you may need to drive more than one set of speakers from a single RAT1, such as in large rooms or adjoining areas where common volume operation is acceptable. A typical system is shown in Fig. 6 . 1. Use the same charts and rules for setting the impedance jumpers. In Fig. 6 , all 8-Ohm speakers and an amplifier capable of handl[...]