Carvin FX1244P Instruction Manual - Page 23

FX44 Mixer Detailed Control Descriptions Section 3 11) "STEREO-"MONO/MON1" SWITCH (Powered Models only) This switch is used to select the type of signal sent to the speakers. The "STEREO" setting is used to send different signals to the left and right speakers, as for stage performances. "MONO/MON 1" is generally used for a Public Address (PA) system. The MONO output would feed the main speakers. and the MON 1 would feed the monitor to the lecturer (or additional speakers if needed). 12) "LEFT (MONO)" and "RIGHT (MON 1)" Power Amp Connections (Powered Models only) These jacks are output jacks used to drive speakers. (See section #11, above for selected output.) There are 4 speaker outs, 2 Left and 2 Right. The MINIMUM speaker loading PER SIDE is 4O. That is to say 4C1 in one Left speaker jack and the other one unused, or 8S2 in each of the 2 Left speaker jacks. The same holds true for the Right side. Loading your console below 4r2 on either side may damage the amplifier circuitry. To determine the impedances you are using see Section #4-1 'Speaker Impedance'. It is very important to note that on all speaker cords you should use ONLY NON-SHIELDED cables. This is the only place in your system that you will use this type of cable. Shielded cables such as guitar cords can cause high performance amplifiers such as the one in your console to oscillate from excessive cable capacitance. Oscillation is a form of electronic feedback and can ultimately damage your amplifier. See the diagram below to properly determine if your cables are shielded or not. For speaker wire lengths up to 100', it is recommended that you use a 16 gauge or larger wire. For speaker runs up to 300', it is recommended that you use a I 4 gauge or larger wire. This will provide the best proper delivery of power to your speakers. For speaker run lengths any longer than this we recommend that you call GARVIN for a proper recommendation. CAUTION: You should always turn your unit off when connecting or disconnecting your speakers 13) "POWER AMP INPUT", "L" and "R" Jacks (Powered Models Only) These jacks are access inputs to the two power amplifiers you have in your unit. Normally the two power amplifiers in your unit are dedicated to driving the Stereo or Mono/MON 1 outputs from the 2 TRACK. This consumes the use of both power amplifiers. However. if you need only a "MONO" main speaker system, it will only require (1) amplifier to drive that system. So, by taking an external signal and plugging in either "POWER AMP INPUT", you can then use the console as a simple power amp. Additionally, using these inputs allow you to use the EQ, on the Master Section, assigned to the jack used (Left or Right), to adjust the signal. One or both "POWER AMP INPUT"s may be used. The end result is that you are able to (within your mixing console) internally power both your main speakers. These jacks make the power amplifiers in your unit extremely versatile. It allows you to use them for virtually any speaker power requirement you may have by simply plugging any "pre-amp" level signal into your internal power amplifiers ( "POWER AMP IN" jacks) to subsequently power your main speakers ("LEFT" and "RIGHT"). In using these inputs you will interrupt the signal normally sent by the console to the speakers. 14) Power On/Oti Switch This is the main AC power switch for the mixer. It is normal to hear a siight thump on both turning on and turning off your console. This "Turn On Transient" will not harm your speakers. It is always a good idea to have the main volume faders off when turning on the console. This will eliminate any possibility of feedback or excessively loud noises when turning on your console. 15a) Power Cord Connector, With Fuse A standard "European Style" power connector is provided. This allows you to detach your power cord when transporting your console. Be sure to check your A.C. power source to be sure it is a 110V to 120V, 50 to 60Hz A.C. source. If it is 240V, see #16 below. It is an excellent idea to get into a habit of placing your power cord in a place where it will always be transported with the console. This will save you from forgetting it or misplacing it and not being able to later power up your console. However, if you do misplace it you may always order another from CARVIN. They only cost $5.00 plus $2.00 shipping and we'll be ready to rush one to you should you need it. 3.13