User manual FENDER 215SC

[. . . ] 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. [. . . ] Only amplifiers rated for 2 output should be used in this configuration. The following polarity convention should be used when making connections to the 215s / 215sc: 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 three primary considerations to review when placing subwoofers. 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 hinging 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". The 215s/215sc is designed for a "half space" configuration. 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. [. . . ] 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. FIGURE 1 POWERED MIXER MAIN OUT MAIN AMP IN MON. AMP IN MAIN OUT MONITOR OUT 2912c FULL RANGE INPUT MOUNTING POLE INPUT PCN-2 ELECTRONIC CROSSOVER HIGH OUT LOW OUT 215sc 5 FIGURE 2 UNPOWERED MIXER MONITOR OUT MAIN OUT PCN-2 ELECTRONIC CROSSOVER INPUT HIGH LOW OUT OUT SPA-13000 A IN B IN A OUT B OUT FULL RANGE INPUT FULL RANGE INPUT 2912c 2912c IN M-500 MONITOR AMPLIFIER OUT OUT ST-75 SPL 1285 MK-II MONITOR SPEAKER 215sc SPL 1285 MK-II MONITOR SPEAKER 6 FIGURE 3 2915c 2915c 2915c 2915c ST-75 SUBWOOFERS 215sc 215sc UNPOWERED MIXER MONITOR OUT MAIN OUT SPA-13000 A Out B Out (Dual mono operation) IN IN M-500 MONITOR AMPLIFIER OUT OUT SPL 1285 MK-II MONITOR SPEAKER INPUT SPL 1285 MK-II MONITOR SPEAKER SPA-13000 A Out B Out (Dual mono operation) IN PCN-2 ELECTRONIC CROSSOVER LOW HIGH OUT OUT 7 SPECIFICATIONS PART NUMBER 071-1320-000 215s 071-1320-100 215sc 20 Hz to 50 kHz, 500W +0, -3 dB into 2 POWER BANDWIDTH MAXIMUM dB SPL OUTPUT LONG TERM DRIVERS 130 dB Two 15" (38. 1cm) cast frame woofers 4" (10. 2 cm) voice coils 110 ounce (3. 1 kg) magnets 3/4" 13-ply Baltic birch Black paint (215s) Black carpet (215sc) CABINET FREQUENCY RESPONSE Axial +/- 3 dB: LF Limit +/- 3 dB: LF Limit +/- 3 dB: AXIAL SENSITIVITY SPL @ 1W/1m: 1/2 Space Efficiency: POWER HANDLING E. I. A. [. . . ]