User manual FENDER 1211 MKIII

[. . . ] We are sure you will find it both a unique and effective sound reinforcement product, providing years of troublefree service day in and day out. Mk III Series Loudspeaker Systems are professional, fullrange, two-way, compact loudspeakers designed for the most demanding permanent or portable sound reinforcement requirements. Moreover, these speakers are ideal for use as a two-way system or as the mid / high pack in a three-way set-up incorporating a Fender subwoofer loudspeaker system. [. . . ] If long speaker cables are required, it is important to ensure the cable`s gauge 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 SPEAKER WIRE LENGTH 100'-UP (30. 5 m-UP) 10 12 12 14 14 16 18 18 18 50'-100' (15. 25-30. 5 m) *25'-50' (7. 60-15. 25 m) 14 *16 16 18 18 18 10'-25' (3. 05-7. 60 m) 0'-10' (0. 00-3. 05 m) A B 4 *8 16 SPEAKER IMPEDANCE [z] *Example - If the speaker wire length required is between 25-50 feet (7. 6015. 25 meters) and the speaker impedance is 8, the minimum recommended speaker wire gauge is 16. 8* 16 Cabinet A Impedance + - *Example- Cabinet A is 8 ohms. The total impedance when connected in parallel is: 1 Zp = = 5. 3 ohms. 1 1 8 + 16 SERIES IMPEDANCE 16* Cabinet B Impedance 8 4 2 18 10 6 4 20* 12 8 6 24 16 12 10 32 24 20 18 + Z s = Z + Z . . . Z 1 2 n + + - Resistance in per foot AWG Section (30. 5 cm) @ 77º F (25º C) 2 [mm ] Cross- 18 16 14 12 10 8 0. 83 1. 32 2. 10 3. 32 5. 27 8. 38 . 00651 . 00409 . 00258 . 00162 . 00102 . 00064 A B 2 4* 8 16 Cabinet A Impedance *Example- Cabinet A is 4 ohms. The total impedance when connected in series is 4 + 16 = 20 ohms. 4 Mk III SERIES SPEAKER CONNECTIONS In normal operation (using the passive internal crossover), the 1/4" jacks and the Speakon TM Connectors are wired in parallel allowing any one of the connectors to be used as an input and any other as an output. This allows "daisy chaining" of multiple loudspeakers, eliminating the need for several long, cumbersome runs of speaker cable. During normal mode, the connections are as follows: Polarity Positive (+) Negative (-) Phone Jack Tip Sleeve SpeakonTM 1+ and/or 2+ 1- and/or 2- SETUP SUGGESTIONS The placement of any speaker can dramatically affect its sound. Thus, there are several considerations to review when placing loudspeakers. First, the range of the horizontal coverage should be determined. The speaker may be used as a single unit, as part of a pair, or as part of a group of widely spaced enclosures. In any case, maximum horizontal coverage will be desired. Examples of these types of setups are shown. [. . . ] For those situations requiring a subwoofer, Mk III loudspeakers can still be used if a three-way electronic crossover is used. An example of this configuration is shown on the next page. It is strongly recommended that a fourth-order "Linkwitz-Riley" or a digital FIR fourth-order active crossover be used. [. . . ]