fostex ff85k as a mid-hi in 2 way speaker - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st December 2008, 05:13 AM   #1
mipop35 is offline mipop35  Argentina
diyAudio Member
 
Join Date: Aug 2006
Default fostex ff85k as a mid-hi in 2 way speaker

Hi, my first post here.
I'm posting both in Loudspeakers and Full Range threads because I'm not shure wich can give more help.


BRIEF:
I will use a FF85K as a mid-tweeter with existing 10" woofer and box.
I'm looking for answers/experiences/suggestions in:

a) how to obtain the lowest crossover point in order to maintain the rated loudspeaker "program" power of 40W RMS

b) the smallest and easy to make enclosure for the ff85k at the above xover freq., since the original tweeter was a sealed unit.

FULL:
The original speakers are a pair of old JVC SK500II. Two ways, 50W RMS nominal power. Tweeter was 3" paper cone, but crossed well over 1khz I guess. Woofer an cabinet are in good shape. They will be mated with JVC AX2 Amp, 40W RMS, The same age and in total original condition.

FF85K fits almost perfect in the front cutout, but there is no enclosure for it because the original tweeter was a sealed unit. So special care must be taken in order to minimize the extra volume that will be extracted from the original speaker cabinet, since the woofer will stay the same.

I would like to set the crossover at about 500hz. I wolud like to know what power handling may I expect from the complete loudspeaker (or from the ff85k) at this crossover frequency. I remember I saw, in the distant past, some typical "music programs" energy vs. freq. distribution plots, but I can't find them anymore.

On the other hand, concerning the enclosure, the small volume requirements will almost sure push the resonance freq. of the ff85k/enc. near 500hz posing potential problems in the freq. response at the xover area.
I would like to know if someone has experience with the ff85k in small enclosures at 500hz. Could a vented enclosure help to get a smaller volume? Any "special" kind of port?

Thanks,
Diego
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fostex FF85K 3rd party measurements? DcibeL Full Range 10 9th June 2009 06:04 AM
Help with Sansui Woofer +Fostex FF85K for OB SCD Full Range 12 4th December 2008 03:35 PM
Fostex FF85K for sale lcholke Swap Meet 3 14th September 2008 06:01 PM
amp for Fostex FF85k tame Multi-Way 0 28th February 2005 07:21 PM
fostex FW208N and FF85K navin Full Range 26 6th June 2004 06:27 PM


New To Site? Need Help?

All times are GMT. The time now is 06:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2