User manual FENDER 115SA

[. . . ] You see, your sound system is more than just a combination of dials, wires and speakers. It is an integral part of the audio chain and should be treated with special care and attention to detail. [. . . ] Note: A single 115sA/118sA subwoofer represents an 8 load to the amplifier. Daisy chaining two of them in parallel will represent a 4 load to the amplifier. Only amplifiers rated for 4 output should be used in this configuration. The following polarity convention should be used when making connections to the 115sA/118sA: Polarity Positive (+) Negative (-) Phone Jack Tip Sleeve SETUP SUGGESTIONS The placement of any speaker can dramatically affect its sound. Thus, there are three primary considerations to review when placing subwoofers. The full-range speaker system should be as close as possible to the subwoofer so the sound from the subwoofer reaches the audience at the same time as the sound from the full-range speaker systems. If the subwoofer is placed too far from the full-range speaker systems, a slight smearing of the lower bass frequencies may occur. While ideal placement for this consideration would involve stacking the fullrange speaker on top of the subwoofer, this effect is quite subtle and an obvious effect may not be heard until the separation between the two cabinets is large enough to cause an audible time delay. The second consideration is to try to obtain as much bass as possible from the subwoofer. A speaker in the middle of the floor or up in the air with its back against a wall is referred to as operating in "half space". Placing a speaker near a large, flat wall and on the floor (quarter space) will boost the bass performance by about 3 dB as compared to half space. The more surfaces the subwoofer is placed against, the fewer the number of subwoofer enclosures are needed to achieve a desired SPL. [. . . ] Figure 3, on page 7, shows a more extensive configuration for those setups requiring additional power. 4 USING A FULL RANGE CABINET AND A 115sA/118sA SUBWOOFER 112-ELC 112-ELC 5 USING MULTIPLE FULL RANGE CABINETS AND 115sA/118sA SUBWOOFERS 112-ELC 112-ELC 112-ELC 112-ELC 6 BI-AMPED MAIN SYSTEM WITH MONITORS SPL 1225 SPL 1225 SPL 1225 SPL 1225 SUBWOOFERS A Out B Out UNPOWERED MIXER MONITOR OUT MAIN OUT (Dual mono operation) IN IN A Out B Out M-500 MONITOR AMPLIFIER OUT OUT (Dual mono operation) IN INPUT - LOW HIGH OUT OUT - - - - - 1275A MONITOR SPEAKER 1275A MONITOR SPEAKER PCN-2 ELECTRONIC CROSSOVER 7 SPECIFICATIONS MODEL PART NUMBER MAXIMUM dB SPL OUTPUT LONG TERM DRIVER 115sA 071-1150-000 118sA 071-1180-000 124 dB 15" (38 cm) woofer 2. 5" (6 cm) voice coil 3/4" (1. 9 cm) Oriented Strand Board +/- 3 dB: 48 Hz to 110 Hz 125 dB 18" (46 cm) woofer 2. 5" (6 cm) voice coil 3/4" (1. 9 cm) Oriented Strand Board 42 Hz to 110 Hz CABINET FREQUENCY RESPONSE AXIAL SENSITIVITY POWER HANDLING SPL @ 1W/1m: 1/2 Space Efficiency: 99 dB 5. 4 % 99 dB 5. 4 % 450W 900W 1800W 8 (29. 5 kg) (66. 0 cm) (62. 8 cm) (61. 6 cm) 87 lbs. 32" 24. 75" 24. 75" (39. 5 kg) (81. 3 cm) (62. 8 cm) (62. 8 cm) E. I. A. [. . . ]