User manual FENDER CS-18

[. . . ] Wishing you years of enjoyment and a heartfelt thank you, Bill Schultz Bill Schultz Chairman Fender Musical Instruments Corporation CONTRACTOR SERIES CS-18 PROFESSIONAL SUBWOOFER LOUDSPEAKER INTRODUCTION 13-Ply Baltic Birch Cabinet 800W Program Power Handling 40 Hz to Response 400 Hz Frequency Thank you for purchasing a Contractor Series CS-18 Professional Subwoofer from Fender® Pro Audio. We are sure you will find it both a unique and effective sound reinforcement product, providing years of trouble-free service. [. . . ] The mid/high racks 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 mid/high packs. If the subwoofer is placed too far from the mid/high packs, a slight smearing of the lower bass frequencies may occur. While ideal placement for this consideration would involve stacking the mid/high pack 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 subwoofer hanging in free air is referred to as operating in "full space" since the subwoofer is free to radiate in all directions (omnidirectionally). 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". Full space operation will result in about a 3 dB decrease in output as compared to half space. In order to compensate for the decrease in output using a full space configuration, the power amplifier may need to be turned up. 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. The third consideration is convenience and the visual aspect of the speaker array. For temporary installations, the subwoofer can be used as a support for a mid/high pack mounted directly on top of the subwoofer. [. . . ] Normally, the output of the full range cabinets is subjectively higher than that of the subwoofers so a balance can be achieved by turning down the mid/high frequency signal at or before the power amplifiers. BI-AMP SYSTEM USING A FULL RANGE CABINET AND SUBWOOFER POWERED MIXER MAIN OUT MAIN AMP IN MON. AMP IN MAIN AMP OUT MONITOR AMP OUT FULL RANGE INPUT C-12 or C-15 FENDER TRIPOD STAND INPUT HIGH OUT - LOW OUT - - - - - PCN-2 ELECTRONIC CROSSOVER C-18 5 BI-AMPED MAIN SYSTEM WITH MONITORS UNPOWERED MIXER MONITOR OUT MAIN OUT PCN-2 ELECTRONIC CROSSOVER - - - - - - INPUT A IN HIGH LOW OUT OUT B IN SPA-13000 FULL RANGE INPUT A OUT B OUT FULL RANGE INPUT IN C-12 or C-15 C-12 or C-15 M-500 MONITOR AMPLIFIER OUT OUT C-18 SPL 1285 MK-II MONITOR SPEAKER SPL 1285 MK-II MONITOR SPEAKER 6 MULTIPLE SPEAKERS IN BI-AMPED SYSTEM WITH MONITORS C-12 or C-15 C-12 or C-15 C-12 or C-15 C-12 or C-15 SUBWOOFERS C-18 C-18 A Out B Out UNPOWERED MIXER MONITOR OUT MAIN OUT SPA-13000 (Dual mono operation) IN IN A Out B Out M-500 MONITOR AMPLIFIER SPA-13000 OUT OUT INPUT - (Dual mono operation) IN HIGH OUT LOW OUT - - - - - PCN-2 ELECTRONIC CROSSOVER SPL 1285 MK-II MONITOR SPEAKER SPL 1285 MK-II MONITOR SPEAKER 7 SPECIFICATIONS MODEL PART NUMBER MAXIMUM dB SPL OUTPUT LONG TERM DRIVER CS-18 071-1310-300 124 dB 18" (46 cm) cast frame woofer 4" (10 cm) voice coil 109 ounce (3. 1 kg) magnet 3/4" (1. 9 cm) 13-ply Baltic birch (unfinished) Axial +/- 3 dB: LF Limit +/- 3 dB: SPL @ 1W/1m: 1/2 Space Efficiency: 42 Hz to 400 Hz 42 Hz 98 dB 2. 25 % CABINET FREQUENCY RESPONSE AXIAL SENSITIVITY POWER HANDLING E. I. A. [. . . ]