Results 1 to 2 of 2

Thread: L-Pad vs. Toggle Switch

  1. #1
    vifa32144
    Guest

    L-Pad vs. Toggle Switch

    When building a crossover for JBL mid's and hi's, what is a toggle switch and what numerical specification's do they use to describe them including separate quality resistor's to adjust the impedance?

  2. #2
    RIP 2011 Zilch's Avatar
    Join Date
    Jun 2004
    Location
    Berkeley, CA
    Posts
    9,963
    "Toggle" switch merely denotes a switch with a projecting lever. One that is double-pole may be used to select between two resistor pairs comprising different attenuation circuits.

    While "L-Pad" usually refers to a variable attenuation control, a simple two-resistor circuit configured for fixed attenuation is an L-Pad as well.

    It takes a rotary selector to switch among more than two fixed-resistor attenuations, or a system of jumpers as is used in some JBL crossovers.

    The fixed resistors must be selected so as to maintain a constant impedance in combination with the driver being attenuated:

    Play a bit at #122 here to understand resistive attenuation:

    http://www.bcae1.com/

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. JBL L Pad Question
    By Chas in forum Lansing Product Technical Help
    Replies: 25
    Last Post: 09-16-2009, 09:52 PM
  2. L Pad Knob
    By majick47 in forum Lansing Product General Information
    Replies: 0
    Last Post: 11-29-2004, 10:37 PM
  3. L Pad removal
    By roundnyellow in forum Lansing Product Technical Help
    Replies: 18
    Last Post: 10-02-2003, 01:51 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •