Go Back   Home > Forums > Loudspeakers > Full Range

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 4th August 2009, 11:35 AM   #1
gruni is offline gruni  Germany
diyAudio Member
 
Join Date: Feb 2008
Default Other Box-Type for lower bass

Hello everybody,
two years ago i tried to build those speakers: http://www.kirchner-elektronik.de/~k...photostory.pdf

now i have an unfinished pair of them since 2007. the round shapes and everything were too difficult for my skills and the tools i have available, so they look very ugly. in the beginning i really liked the sound of them and so i kept them, although they are ugly. but one fact is really disappointing: they have much too less bass response so i have to use an exta subwoofer. those two facts make me wonder if i could build new enclosures for the drivers that provide more bass response and are not that difficult to be built. perhaps i could use a horn design?

i hope anybody can help me.

here you can find the tsp: http://www.hifisound.de/oxid/oxid.ph...W-130-AL-8-MG/
  Reply With Quote
Old 4th August 2009, 06:11 PM   #2
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Greets!

FYI, this post belongs in the LOUDSPEAKER forum where you may get more input, so please ask a moderator to move it.

Regardless, between a ~44 Hz Fs and medium low Qts, it won't go low without significant EQ of some sort and due to it's relatively low efficiency it ideally needs a huge horn, so the 'small' option is to use baffle step compensation (BSC) to lower (tonally balance) its mids/highs to its LF/mid-bass band-width (BW) output with the understanding that reproducing the lower octaves will require a 'sub' system.

The speaker you built already seems to have significant BSC, so doesn't appear at a glance to be a viable option, but you can always increase it with more resistance. Inserting a cheap potentiometer in the amp/speaker wiring will allow you to find how much you need (if any), then replace it with a suitable power rated non-inductive resistor.

Note that adding more BSC allows a larger, lower tuned alignment, but with only 2 mm Xmax probably not a good plan unless backed into a corner.

All that said, the simple 'BIB' single fold pipe horn should please without a 'sub' for all but the lowest pipe organ and HT LFE special effects if two good corners are available or at least decent loading into the 30s just up against a wall if it's a ~standard height ceiling:

Terry Cain's BIB -why does it work and does anyone have those Fostex Craft Handbooks?

http://www.zillaspeak.com/bib.asp

http://www.quarter-wave.com/General/...BIB_Design.pdf

FYI, I uploaded both the published and measured WinISD driver files:

http://www.hometheatershack.com/foru...-w130-al-8.wdr

http://www.hometheatershack.com/foru...-measured-.wdr

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 4th August 2009, 09:14 PM   #3
gruni is offline gruni  Germany
diyAudio Member
 
Join Date: Feb 2008
seems the best solution would be to use new drivers... or to add a passive woofer for each channel to get rid of the extra woofer... the bib approach is a bit too large for my room of about 3x4m
  Reply With Quote
Old 8th August 2009, 01:39 PM   #4
gruni is offline gruni  Germany
diyAudio Member
 
Join Date: Feb 2008
i decided to start a completely new project.
i tried a bit in winisd using kenford sbx 1620 drivers, of course they are cheap but i got very low bass response with two of them in a 60l ported box tuned to about 34hz. i wonder if this could sound any good, because a single driver of them is almost unusable with its tsp...

they can be found here: http://img131.imageshack.us/i/imp65da0.jpg/
  Reply With Quote
Old 10th August 2009, 12:30 PM   #5
gruni is offline gruni  Germany
diyAudio Member
 
Join Date: Feb 2008
any comments on this?

i thought a bit further and decided to use the two drivers in a d'appolito configuration crossed over below 1000hz to a tangband fullrange driver or so... what about that?
  Reply With Quote
Old 10th August 2009, 09:53 PM   #6
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Which drivers?

WRT the SBX 1620, 60 L would be for one, so 120 L for two and since tuning a reflex below ~0.7*Fs is not normally a good plan, so tuning it to ~36 Hz using at least two 10.16 cm diameter vents looks OK in a sim.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  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
12 " for lower midrange - upper bass Audiodidakt Multi-Way 33 23rd June 2009 04:39 PM
Both AmpFuses blowing on lower tone bass Oddy88 Car Audio 10 18th July 2007 05:33 AM


New To Site? Need Help?

All times are GMT. The time now is 04:57 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