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First, if one speaker fails, the others will continue to operate. Second, because in a series connection one speaker affects the output of the other speakers, unpredictable frequency response is a concern. Third, most speaker cabinets are already wired for Additionally, power and audio signal cables are the most common sources of sound system failure. Well made and carefully maintained cables are essential to the reliability of the entire sound system. If long speaker cables are required, it is important to ensure the cable is sufficient to transfer all of the available amplifier power to the speakers rather than absorbing the power itself. As a rule of thumb, larger wires are better as they conduct more power to the speakers (larger wire has smaller gauge numbers). Below are two charts listing speaker wire gauges and recommendations for best results. SPEAKER WIRE GAUGE 10 12 14 12 14 16 14 *16 18 16 18 18 18 18 18 parallel connections making parallel connections the 100'-UP 16W * n 0'-10' SPEAKER WIRE LENGTH most common wiring method. (30.5 m-UP) 50'-100' When using your SRM 6302 / 8302, be sure that the (15.25-30.5 m) minimum load connected to each channel is 4 ohms. Below are two charts demonstrating how to *25'-50' calculate both parallel and series impedance. (7.60-15.25 m) PARALLEL IMPEDANCE 10'-25' 1 Z= (3.05-7.60 m) p 111 + Z Z ...Z 12 5.3* 8 4 5.3 8W *16W Cabinet A + + - + -A B- Impedance *Example- Cabinet A is 8 ohms. Cabinet B is 16 ohms . The total impedance when connected in parallel is: 1 Z p = = 5.3 ohms. 11 8W + Impedance Cabinet B (0.00-3.05 m) 4W *8W 16. SPEAKER IMPEDANCE [z] *Example - If the speaker wire length required is between 25-50 feet (7.60 15.25 meters) and the speaker impedance is 8W , the minimum recommended speaker wire gauge is 16. AWG Cross- Section [mm ]2 Resistance in W per foot (30.5 cm) @ 77. F (25. C) 18 0.83 .00651 16 1.32 .00409 14 2.10 .00258 12 3.32 .00162 10 5.27 .00102 8 8.38 .00064 8 16 SERIES IMPEDANCE * 18 20* 24 32 10 12 16 24 6 8 12 20 4 6 10 18 Z Z +Z ...Z 16W = 1 2 s n Impedance Cabinet B + - + - B 8W 4W 2W A 2W 4W *8W 16W + Cabinet A Impedance *Example- Cabinet A is 4 ohms. Cabinet B is 16 ohms. The total impedance when connected in series is 4 + 16 = 20 ohms. 7 BASIC SETUP OF YOUR SRM 6302 / 8302INPUT / OUTPUT CONNECTIONS BASIC SETUP OF YOUR SRM 6302 / 8302INPUT / OUTPUT CONNECTIONS The SRM 6302 / 8302 has a variety of connectors on its input / output panels. Below is a chart listing the various types and their pin outs. Jack Style Connection Pin Out MIC INPUTS XLR Female Balanced Input Pin 1 = GND Pin 2 = POS Pin 3 = NEG LINE INPUTS 1/4" TRS Balanced Input Tip = POS Signal Ring = NEG Signal Sleeve = GND MAIN, MONITOR, EFFECTS OUTPUTS 1/4" TS Unbalanced Output Tip = Signal Output Sleeve = GND FOOT SWITCH 1/4" TS Switch Tip = Signal Sleeve = GND PA 1, PA 2, EFFECTS INPUTS 1/4" TS Unbalanced Input Tip = Input Signal Sleeve = GND TAPE IN / OUT Dual RCA Unbalanced Input / OutputInner Ring = Signal Outer Shell = GND PA 1, PA 2 OUT 1/4" TS Speaker Output Tip = Signal Sleeve = GND Before using the SRM 6302 / 8302, please read and follow the steps listed below: 1. IMPORTANT Heed all safety warnings when operating the SRM 6302 / 8302. 2. Make sure the power switch is in the OFF position and all volume levels are in the 0 position. 3. Next, plug the supply cord into a power source with the correct voltage. 5. Connect the speaker cables from the SRM 6302 / 8302 PA out jacks to the input jacks of the speaker cabinets. 6. Connect the cord(s) from any outboard gear, microphones or other signal source(s) to the appropriate input jack(s) on your SRM 6302 / 8302's. 7. First, turn all outboard gear, instruments and other equipment ON, then the SRM 6302 / 8302. 8. Increase volume controls and effects level controls to their desired levels, listening for feedback or ringing. 9. When shutting down the SRM 6302 / 8302, turn OFF the SRM 6302 / 8302 first then any additional outboard gear, instruments or other equipment. For more detail on setting up your SRM 6302 / 8302, please refer to the diagrams on pages 10 thru 13. 8 TROUBLESHOOTINGGROUNDING AND HUMS TROUBLESHOOTINGGROUNDING AND HUMS Ground loops are one of the most common causes of hum and buzz in sound reinforcement systems and other audio products. A ground loop usually occurs if the separate pieces of equipment are plugged into different AC circuits. Also, if the audio wiring is placed too close to the power cords, hums or buzzes can bleed into the system. Still, improperly maintained power and audio cables are yet another cause of bothersome noise. In order to help minimize stray hums and buzzes, here are some helpful hints. 1. Keep all electronics connected to the sound system on the same electrical circuit. 2. Keep audio signal cables away from the AC power cords. 3. Use balanced cables when applicable. 4. Always plug the SRM 6302 / 8302 into a grounded AC electrical outlet. 5. Be sure to use properly maintained cor...

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