Frugel-Horn Mk3 Builds & Build Questions - Page 79 - diyAudio
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 21st February 2013, 05:53 AM   #781
xrk971 is offline xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Valvesound,
That's great that you tried them with temporary sticky tack. However, I doubt that this makes an airtight seal and a pinhole leak is all it takes to kill the warmth from the deep bass. Reserve your listening judgement until after you properly seal with glue. If you have ever played a woodwind instrument you know how a very small leak in a finger pad prevents the lowest note from being played. The conundrum is how do you adjust the stuffing after buttoning it all up? You can do a lot with curved wire hooks through the driver cutout. Another way is to make the top removable with a rubber gasket. Once you seal it, I am almost certain that the sound will be warmer and better.
  Reply With Quote
Old 21st February 2013, 06:17 AM   #782
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Upper midrange (1.25-2.5k) is not going to be affected by stuffing, unless you are getting refection back thru the cone (the felt you used would need to be too reflective). These drivers need 500 hrs or so before they are approaching full breakin. What amp are you using?

And what X said

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 21st February 2013, 06:52 AM   #783
diyAudio Member
 
valvesound's Avatar
 
Join Date: Jun 2011
Location: Johannesburg
Hi Dave, I haven't put a second layer of felt behind the driver like you suggested yet, was too eager to get them playing . I will definitely do it tonight.

Regarding break-in....these drivers had about 50 hours runtime in shoeboxes after I received them from you, so yes they aren't fully run in yet.

I'm using a DIY Nelson Pass F5 amplifier.

What change can I expect to hear if I add the other 20g stuffing under the driver?

I hear what X said but am afraid to go to the completely glued-up state yet.....

Last edited by valvesound; 21st February 2013 at 06:59 AM.
  Reply With Quote
Old 21st February 2013, 07:48 AM   #784
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Adding stuffing usually decreases the magnitude of the bass (as well as smoothing the ripple)

50 hrs is still the awkward phase.

A brightness can often be a case of not enuff bass -- i note that you are only trusting that the goey stuff is holding on the sides. With the bass that an FH3 is capable of without screws every 6" or so or lots of clamps, the sides are going to be moving all over the place. It looks like you used some sort of particle board, that won't takemuch in/put action of the screws, i'd glue them up and add more stuffing if needed by pushing it down from the driver hole -- having someone with small hands and skinny arms might be helpful.

We won't worry about the bass, but the combo of (what should be) a great amp and the FH3/EL70eN combo should be showing you something about the quality of recording.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 21st February 2013, 07:55 AM   #785
diyAudio Member
 
valvesound's Avatar
 
Join Date: Jun 2011
Location: Johannesburg
Hi Dave, I think you might have hit the nail on the head with the combo revealing a bad recording. The speakers I have used up to now might be more lenient towards bad recordings.

On the run-in of the drivers....initially when I put the drivers in the shoe boxes they sounded like small drivers in shoe boxes. After the 50 hours they opened up and a full sound stage was revealed so I'll put some more hours on them as you suggest.

Last edited by valvesound; 21st February 2013 at 08:05 AM.
  Reply With Quote
Old 21st February 2013, 09:16 AM   #786
jemraid is offline jemraid  United Kingdom
diyAudio Member
 
Join Date: Aug 2004
Location: NE Derbyshire
Hello VS and Hello all,

I ran mine in 24/7 at low volume for two weeks before I tamed the bass a bit with the stuffing. Please don't underestimate the blue tack it's nearly as good as the glue, I jumped on the sides to seal them and then they become quite difficult to get off. It was a month before I glued them up properly, I wanted to be really satisfied that I'd got the sound I wanted.

Cheers - Jim
  Reply With Quote
Old 21st February 2013, 09:25 AM   #787
diyAudio Member
 
valvesound's Avatar
 
Join Date: Jun 2011
Location: Johannesburg
I also thought that I got a good enough seal with the sticky tac.
  Reply With Quote
Old 21st February 2013, 09:51 AM   #788
xrk971 is offline xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
If you ever have doubts what is going on with a new build, get a Panasonic wm61a mic capsule ($2 ea) and wire it to an old 3.5mm jack and plug into mic input if your pc. Use Holmimpulse to get freq response spectrum. Very useful tool.
  Reply With Quote
Old 21st February 2013, 10:22 AM   #789
diyAudio Member
 
valvesound's Avatar
 
Join Date: Jun 2011
Location: Johannesburg
thanks for that info x!
  Reply With Quote
Old 21st February 2013, 11:52 AM   #790
diyAudio Member
 
Join Date: Aug 2011
Quote:
Originally Posted by jemraid View Post
Hello VS and Hello all,

I ran mine in 24/7 at low volume for two weeks before I tamed the bass a bit with the stuffing. Please don't underestimate the blue tack it's nearly as good as the glue, I jumped on the sides to seal them and then they become quite difficult to get off. It was a month before I glued them up properly, I wanted to be really satisfied that I'd got the sound I wanted.

Cheers - Jim
You are right about blue tack, if you need a lot of it they sell it on ebay for waterproofing camper roof hatches. I can't remember what it's called but it comes in a long bead on paper backing, very handy for application.
  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
Frugel-Horn Mk3 planet10 Full Range 1287 16th September 2014 07:50 PM
Frugel-Horn Mk3 flat-paks planet10 Planet 10 hifi 462 3rd July 2014 12:56 AM
Frugel-Horn Mk3 Auditions planet10 Full Range 24 8th June 2012 07:18 PM
"straight" frugel horn mk3 mahleriana Full Range 10 15th April 2011 01:28 AM
My Frugel-Horn Build italynstylion Full Range 130 22nd June 2010 12:24 AM


New To Site? Need Help?

All times are GMT. The time now is 03:21 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