Go Back   Home > Forums > Loudspeakers > Subwoofers

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 June 2009, 08:16 AM   #1
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Default Dampening in Tapped Horns??

I'm interested in knowin if people use dampening in tapped horns? Any ideas appreciated.

I'm building the large 2.2meter horn.

Andrew.
  Reply With Quote
Old 4th June 2009, 08:35 AM   #2
diyAudio Member
 
Join Date: Sep 2007
I've got a stripe (15*200 cm) from a polyester sheet hanging
loose in the second part (half -> mouth) of my tapped horns,
single fold, 400 cm. It made the bass tighter and more defined
than without damping.
  Reply With Quote
Old 4th June 2009, 11:23 AM   #3
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Thanks Petter

What do you mean, polyester?
  Reply With Quote
Old 4th June 2009, 01:28 PM   #4
diyAudio Member
 
Join Date: Apr 2007
Go to:

Dual 8" tapped horn = TH-SPUD

Polyester fiberfil is a spun plastic material commonly sold in sheets or bulk. Used as insulation or sound control,
it works like fiberglas, but without the irritation.

The main problem with dampening, is how much do you need, and where do you need it. This is often a cut-and-try
process, and doesn't model well.
__________________
Don
  Reply With Quote
Old 4th June 2009, 09:33 PM   #5
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Thanks Don...that's a good link.

I'll give the horn about 1/3 stuffing based on what I've read.

For my TH (the long 2.2m version), I'll have one entire side with a removable pane. Probably use that awful black head-gasket for a sealing agent....but may not even need that for he initial evaluation stages. Thoughts? Perhaps a simple dry cork or foam might be better...less messy.
  Reply With Quote
Old 5th June 2009, 12:22 AM   #6
diyAudio Member
 
Moondog55's Avatar
 
Join Date: Jun 2007
Location: Norlane; Geelong: Victoria: Australia
Better stuff at Clarke Rubber,
buy a few meters of the soft round- section foam they sell as filler for brick-work and sealing around door jambs, it is cheap and reusable and available in sections from 3mm to 45mm.
i can't think of the term for it at the moment, blame the brain cloud
__________________
QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"
  Reply With Quote
Old 5th June 2009, 01:25 AM   #7
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Thanks

Just vsited Clarke & Rubber...but bough the polyfill from Spotlight. I'll try that first.

Cheers.
  Reply With Quote
Old 5th June 2009, 08:11 AM   #8
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Just spent 8 hours building the horn. It's up and running.

Talk about OVER KILL. The thing can't get past 1/10 volume on the (600-watt) amp.

Heaps of room mods to attend to due to vibration etc. This unit is better suited to a small theatre rather than a lounge room. (Wife just got home from work to see what's happened to the lounge.....not impressed. My Lowther Big Fun Horns now look.....puny!)

I tried Madonna - Dick Tracy soundtrack...with the plate amp on only...and no stereo amp....a good way to test the sub.

The house just shook....hardly pleasant....but very effective.

I'm learning about the importance of integrating bass with mids/highs....it's hard work!

I think I should build the 30Hz smaller horn...half the size.
  Reply With Quote
Old 5th June 2009, 08:38 AM   #9
diyAudio Member
 
Moondog55's Avatar
 
Join Date: Jun 2007
Location: Norlane; Geelong: Victoria: Australia
When you say 2.2meter do you mean 1/4 wavelength 2.2M or that the units are 2.2M tall, I'm still trying to get my head around tapped horns.

I have a pair of Cerwin Vega 124's that would probably work; but I'm not that willing to experiment just at the moment.
Also I don't ATM have a couple of 1000Watt amps
__________________
QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"
  Reply With Quote
Old 8th June 2009, 07:21 AM   #10
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
2.2m tall...horn path is twice that....
  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
tapped horns - a different perspective & an alternative vasyachkin Multi-Way 58 Yesterday 04:53 PM
jbell's set of four tapped horns davygrvy Subwoofers 480 19th March 2014 01:27 PM
how to model tapped horns? weikertball Subwoofers 2 11th January 2009 09:43 PM
Effect of using dampening in rear horns? Geek Multi-Way 19 26th September 2004 01:11 PM


New To Site? Need Help?

All times are GMT. The time now is 04:54 PM.


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