Rane fac28 free download

File name fac28man active crossover.pdf

OPERATING / SERVICE MANUAL QUICK START No one likes to read manuals. Everyone likes to plug in and turn on. That's usually OK, and with only a very few exceptions, damage is unlikely to result from such procedures when initiating the use of a FAC 28. It is a good idea to begin with all LEVEL controls set to their full counterclockwise position. Unless you are certain that there is an electrical inversion in one of your amplifiers or drivers, set both POS INV switches to their POS positions. Both MUTE switches should be out. If you are using a constant-directivity horn, set the HORN EQ IN/OUT switch to the IN position and adjust the frequency control per the recommendations of the horn's manufacturer. Set the PHASE IN/OUT switch to the OUT position. Set the crossover FREQ selector to the frequency recommended by the speaker manufacturer. Power up the system and set the input and output levels for appropriate performance. NEVER CONNECT ANYTHING EXCEPT AN APPROVED RANE POWER SUPPLY TO THE THING THAT LOOKS LIKE A TELEPHONE JACK ON THE REAR OF THE FAC 28. This is an AC input and requires special attention if you do not have an operational power supply EXACTLY like the one that was originally packed with your unit. See the full explanation of the power supply requirements elsewhere in this manual. FAC 28 ACTIVE CROSSOVER SYSTEM CONNECTION When connecting the FAC 28 to other components in your system for the first time, leave the power supply for last. This will give you a chance to make mistakes and correct them before any damage is done to your fragile speakers, ears and nerves. INPUTS on the FAC 28 are balanced. The 3-pin (XLR) uses pin 2 as "hot" or "+" signal polarity, pin 3 is "return" or "­" and pin 1 is signal ground. If unbalanced operation is required, drive pin 2 as hot and pin 1 as ground. The ј" Input is a tip-ring-sleeve connector. Tip is "+", ring is "­", and sleeve is ground. Unbalanced ј" inputs should drive tip as hot and sleeve as ground and may be either a "mono" ј" or TRS ј" with the ring left open or tied to sleeve, your choice. See Rane Note 110 for further information on this subject. OUTPUTS. The FAC 28's Outputs are balanced as well. As with the 3-pin Input, pin 2 is hot and pin 3 is not. Pin 1 is signal ground. True balanced operation requires only the use of pins 2 and 3 for signal and either case ground (chassis) or pin 1 signal ground for shielding. If unbalanced output is your preference, use pin 2 as signal and pin 1 as return. Use case ground for shield. The ј" Output is a tip-ring-sleeve character whose polarities match the Input connector. Again, have a look at Rane Note 110 for more detail. THE LOW SUM INPUT is used to combine the Low frequency Outputs of two crossover modules (mono sub bass in stereo applications). To take advantage of this feature, the LOW OUT of one crossover module connects to this unbalanced Input. The sum of both modules low frequency selections then appears at the LOW OUT of the module whose