Download
Share
Print this page
QSC UF-2 Owner's Manual
  1. Manuals
  2. Brands
  3. QSC Manuals
  4. Water Filtration Systems
  5. UF-2
  6. Owner's manual
QSC UF-2 Owner's Manual

QSC UF-2 Owner's Manual

Universal filter
Hide thumbs

Advertisement

Quick Links

Download this manual
UF-2
Universal
Filter
®
*TD-004031-00*
A
U
D
I
O
Rev. A
12

Advertisement

loading
Need help?

Need help?

Do you have a question about the UF-2 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Summary of Contents for QSC UF-2

  • Page 1 UF-2 Universal Filter ® *TD-004031-00* Rev. A...
  • Page 2 Using the UF-2 as a crossover is ideal for rental sound systems, since it virtually eliminates the possibility of unauthorized tampering with crossover settings or incorrect crossover output connections, and the loudspeaker damage that may result from such user errors.
  • Page 3 UF-2 accordingly, regardless of the operating mode selected. Usually you would use identical settings on both channels in stereo or parallel mode, depending on the application. If the amplifier is in bridged mode, bypass Ch. 2 of the UF-2 and use the Ch.1 input and processing only. Bypassing the Filtering To completely bypass the filtering circuitry of a channel, set the jumpers on both Jx01 and Jx02 across pins 1 and 2, which are the upper two pins on their headers (see Figure 3).
  • Page 4 To set the corner frequency (at which the output is 6 dB down) of the low-pass filter, choose the appropriate value and switch setting for RNx02 and Sx01, respectively. (Sx01 is a “x10” range switch. In its upper position, the frequency range is x10, in the lower it is x1.) Use the table below to select the right combination. Sx01 = x1 Sx01 = x10 RNx02...

  • Page 5: Typical Applications

    In addition to enabling the high-pass filter at Jx02, if you opt for CD horn equalization you must place a jumper at Jx03 as well. The UF-2 offers two equalization curves for CD horn correction: one with +6 dB of boost at 20 kHz (place the jumper across pins 1 and 2 of Jx03), and one with +10 dB of boost at 20 kHz (place the jumper across pins 2 and 3).
  • Page 6 2. Set the jumper on Jx02 to bypass the high-pass Ultrasonic roll-off filter (across pins 1 and 2). 3. Insert a resistor network in RNx02 that is appropri- Figure 5—UF-2 as an ultrasonic filter ate to the desired roll-off frequency—typically 16 or 20 kHz. Bandpass Filter A bandpass filter may be useful if the speaker system driven by the amplifier has a limited bandwidth.
  • Page 7 This configuration routes the frequencies below a particular frequency to amplifier Channel 1, which shall drive the low-frequency speakers, and the frequencies above to Channel 2, which shall drive the high- frequency speakers. Using the UF-2 as a crossover requires that you drive both amplifier inputs with the same full-band signal.
  • Page 8 Multi-way Crossover System The UF-2 allows you to set up 3- and even 4-way systems. Of course, this also requires that you use more than one amplifier and more than one UF-2. The other basic requirement of using the UF-2 as a crossover is that you must feed each amplifier with the same full-range signal and use the UF-2 to filter the signals in the individual channels.

  • Page 9: Installation

    The UF-2 installs on the amplifier input PC board of any QSC EX Series amplifier. Some older EX amplifiers may require an upgrade to the current input board. Contact the QSC Service Department for details on compatibility with older EX amplifiers.
  • Page 10 The UF-2 contains active components which can be damaged by electrostatic discharge (ESD). Be sure to practice standard ESD precautions and always ground yourself and your workstation before handling exposed circuit cards. CAUTION: Preparing the input board for installation of the UF-2 involves removing solder from feed-through holes on a two-sided circuit card.

  • Page 11: Warranty And Disclaimers

    You will feel them snap onto place. If you need to make any adjustments to the UF-2 settings or if you need to record them, do so now, because the UF-2 will be inaccessible once the input panel is re-installed into the amplifier chassis.
  • Page 12 Factory Service In the event that your UF-2 does need factory service, you may reach QSC Technical Services for return instructions. A Return Authorization (RA) number must be obtained from QSC Technical Services. QSC may not account for products that are returned without a Return Authorization number.