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How do I reduce treble frequency of a JBL D120

81.232.33.131

Hallo ! Have an old Electro Voice 15" from the Force series mounted in a big pinecabinet for my guitaramp . Its a "de-tuned- cabinet" built from Kevin O�Connor�s book. I loke this 15" speaker very much . Under this is a 12" JBL D120 with a aluminium dome . Also in this frontpanel there are several holes or openings . Both drivers are 8 ohms and connected in parallell . My problem is that the JBL is a bit harsch , scrill sounding . I put a small cushion in front of the 12" and it became better . Wonder if I can connect a suitable resistor in series with this JBL or use some cap . Or shall I mount a 5-7 " plate or dome in front of this speaker in order to spread the high notes ? Or do you have another suggestion ? Thanks for an answer .

Follow Ups:

I have some coils... - Coner 12:19:08 11/27/10 (0)
I have lots of new surplus ferrite coils, many sizes, if you
can contact me through here(my profile), please do.

Coner
RE: How do I reduce treble frequency of a JBL D120 - Iron Knee 15:41:51 11/26/10 (2)
You need an inductor (coil) Get an assortment from 0.8mH to 3mH and experiment. Higher value, more low pass, less high frequency response. They go in series with the + lead of the driver.

A hunch would be a 1.2mH but I am not there----
- RE: How do I reduce treble frequency of a JBL D120 - Stewen 08:09:30 11/27/10 (1)
  Thanks for that answer ! Do You think I can wind such a coil on a wooden or paperbobbin ? Bobbinsize , Cu- treadsize , number of turns ...
  .... I mean to start with ??? Any suggestion ?
  - RE: How do I reduce treble frequency of a JBL D120 - Iron Knee 10:18:55 11/27/10 (0)
    Buy them, they are cheap compared to the raw cost of magnet wire. You will save money to buy them outright.

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