Ever think of building a Cornu Spiral horn? Now you can! - Page 18 - 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 22nd December 2012, 04:53 PM   #171
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
So far, maybe the A3. But I have only one and they were $170 a piece retail - crazy! I got mine as a sample. The Vifa is a close second. With some work getting the low end under control, it could be very nice.

I'm not very experienced with back horns, so don't know if they work like front loaded horns. If they do, then it seems to me that a cutoff of 100Hz is about right for the 80" mouth size of the 20" Cornu.
__________________
Take the Speaker Voltage Test!
  Reply With Quote
Old 23rd December 2012, 01:23 AM   #172
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
I've had a chance to do some listening. The thrill is gone, the shine has worn off and I no longer have the ****s and giggles with these babies so let's get serious. Here are some of my thoughts. You already know what xrk, me and everyone else knows about the good side of these things now I want to talk about the not-so-good.

I want to start by saying, I can only describe the boxes you guys saw me build and the Fostex/planet10 drivers so it would be nice to hear your stories as well.

1. I don't like the sound of these in the nearfield. I like to be at least 10 feet away and...

2. After the glitter of the bass wears off, I find I prefer these over damped to allow the mids and highs to come through and then to position myself where the room nodes increase the bass to my tastes. This limits the listening position.

#1 is natural. That happens with most larger speakers but I am surprised with such a small driver. Perhaps this is actually credit due to the cabinet.

#2 may be a result of the driver used. I thought Fostex drivers would be ideal for this box. I mean Tab A and Slot A perfect. Maybe they need to be in a larger horn so I can enjoy the bass more

Interested in your thoughts.

EDIT August 26, 2013:

I had a chance to listen to these in the great outdoors and I am going to retract the "glitters wearing off" stuff. These are a great speaker and they gave others the same experience I was having so disregard that **** I said about them being not so good.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 23rd December 2012, 03:08 AM   #173
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Quote:
Originally Posted by Cal Weldon View Post
I've had a chance to do some listening. The thrill is gone, the shine has worn off and I no longer have the ****s and giggles with these babies so let's get serious. Here are some of my thoughts. You already know what xrk, me and everyone else knows about the good side of these things now I want to talk about the not-so-good.

I want to start by saying, I can only describe the boxes you guys saw me build and the Fostex/planet10 drivers so it would be nice to hear your stories as well.

1. I don't like the sound of these in the nearfield. I like to be at least 10 feet away and...

2. After the glitter of the bass wears off, I find I prefer these over damped to allow the mids and highs to come through and then to position myself where the room nodes increase the bass to my tastes. This limits the listening position.

#1 is natural. That happens with most larger speakers but I am surprised with such a small driver. Perhaps this is actually credit due to the cabinet.

#2 may be a result of the driver used. I thought Fostex drivers would be ideal for this box. I mean Tab A and Slot A perfect. Maybe they need to be in a larger horn so I can enjoy the bass more

Interested in your thoughts.
Cornucopya Fans and Cal:

For me, the thrill is still there and I am still surprised by how good my old CD's sound as I put new ones through. It is a real treat to listen to them still. Also, I listen to my micro 14 inchers all day long upstairs as background music. They are very rich sounding for 2 inch drivers running on less than a watt. So, for me, I am still a happy camper.

I agree with number 1 and like to be at least 8 ft away and it still sounds great at 18 ft away, I think it allows the bass from the edges to blend with the room and integrate with the main output from the driver. Like you, I feel that the sound is like as if it is coming from a very large speaker that you would not want to be close to.

I am using a different driver and a smaller cabinet, so I think that may be the reason I don't have too much bass and the mids and highs from the Vifa, in my opinion, are outstanding. The vocals come through unlike anything I have heard before with perfect imaging and clarity yet the soundstage is very wide. Furthermore, the off axis response is excellent and I feel that there is a very wide sweet spot as long as you are back at least 8 ft. Bob is also using the Vifa in a slightly larger cabinet of 24 in and that still seems to work.

I think that with the Cornu, one wants to be careful not to use a driver with too much bass to start with, and not to make it too big. The increased size lowers the tuning frequency and increases the bass gain since it grows the horn mouth and hence, expansion ratio. The expansion ratio of these Cornu's range from 24 to 30 depending on the size. Think about that, most rectangular BLH designs, you are doing good when you can get 10 expansion from throat to mouth. I think that may mean that the bass is going to be up to 3x more than traditional BLH designs.

So I think one thing tomtry is to get a driver with a hot HF end and not too much bass, and not to make it bigger than 28 in (possibly smaller might be better).

Have a safe and happy holidays you all. Stay warm.

Xrk971

Last edited by xrk971; 23rd December 2012 at 03:12 AM.
  Reply With Quote
Old 23rd December 2012, 03:22 AM   #174
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Since many of you are out having a good time or maybe in bed, and my honey and I have an early flight out in the morning... I'll tell you what happened.

I stayed well away from the speakers. I put on the Jimmy Buffett album Banana Wind.

I turned it up till the drivers actually moved a little, maybe 5 or 10 watts. I turned my back and told myself "Cal you're listening to a 125mm driver."

'nuff said. Smile has returned to my face.

See you guys in a week. Merry Christmas to all. Check in when I can.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 23rd December 2012, 03:25 AM   #175
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
xrk,
your spirit has created this mess. I blame you 100%. That said, I hope we meet one day so I can thank you in person.
Cheers.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 23rd December 2012, 03:28 AM   #176
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally Posted by Cal Weldon View Post
1. I don't like the sound of these in the nearfield. I like to be at least 10 feet away and...
Makes sense. You have to be far enuff away for the drier in the middle and the 4 horn mouths to integrate.

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 23rd December 2012, 03:35 AM   #177
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
That's what I was thinking but I never trust my thoughts, I rely on you and others.

I hope you, Ruth, Daniel, your folks, and the others in your life have a great Christmas.

See you guys in less than a week, fingers crossed.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 23rd December 2012, 04:24 AM   #178
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Quote:
Originally Posted by Cal Weldon View Post
xrk,
your spirit has created this mess. I blame you 100%. That said, I hope we meet one day so I can thank you in person.
Cheers.
I hope we meet too. Have a good trip. It's a fun mess to be in though
  Reply With Quote
Old 23rd December 2012, 08:43 AM   #179
diyAudio Member
 
Join Date: Mar 2011
Quote:
Originally Posted by xrk971 View Post
Switters,
So how does it sound to you now that you have stuffing? What's your impression? Good, great, amazing, or maybe ok only? We love feedback of your listening experience and type of music you have listened to on it. And would you recommend the FR88 to anyone else?
Thanks
Xrk971
Well, now I have to find all the right and proper english words I'm missing to describe perceptions and sensations. This is, for me, a more difficult job than build this loudspeakers
Disclaimer: this is about the 50x50 cm (20x20 in) box, I placed them against the wall but I have yet to position and hang it to the wall. Also, I don't have a high-end reference setup to compare to, so this are just my first impressions.

Low frequencies are really there. Even at very very low volume.
On the other hand it seems to me that LF are not so controlled as with a closed box (but then, in a closed box, a 3" driver would produce a lot less LF), I think this is because 1) the little delay between direct and back emission, 2) the open and big volume of the box doesn't load and "hold" the driver cone like a closed box. But I'm not an expert and this are only my guessing.
The fact that LF aren't tight controlled adds "warm" and perspective to some tracks (voice+double bass) and I like it a lot.
I've listened Massive Attack (Angel, Inertia creeps), Pink Floyd (Time, Shine on...), Dead Can Dance (Bylar, Yulunga), Ella and Louis, Nirvana, Nada Trio, and also some DJ's electronic dance.
Without stuffing they were too booming, also because, I suspect, the glue didn't sealed perfectly the box, after stuffing and some more glue there is a lot less booming. This was evident in particular with two tracks, Bylar (Dead Can Dance) and Brother Wolf Sister Moon (The Cult), that sounded really "strange" before the treatment. Now they sound a lot better, but in Bylar the mid-highs of the femal voice are a little "back" losing a bit of presence. The male voice instead gained in presence.

In conclusion, maybe they are not the most balanced loudspeaker but I (and also other people) like how they sound, I will try other drivers on this box and will build the big version (70x70 cm).
So... I'm very happy... thanks for the idea xrk971

PS: I can't recommend the FR88 because I never listen to it Regarding the FE85, I wish to try other drivers to make a comparison.
  Reply With Quote
Old 23rd December 2012, 11:09 AM   #180
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Switters,
Thank you for the listening impressions. Your English was perfect. Sorry, I thought you were using the FR88, but it sounds like the FE85 works for you. I totally agree that the presence of the bass is there even at very low volumes. This is what makes them great for background music as you often don't want the volume loud but the sound is still full. It sounds like you tried it on quite a bit of rock music and it worked for you.
I am glad you like them.
  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
Line array cornu spiral? jaylgordon Full Range 7 15th December 2013 07:43 PM
Cornu Spiral Copy Horn hersh Full Range 24 7th April 2009 07:20 PM
Cornu spiral horns Cal Weldon Multi-Way 3 14th July 2004 02:51 PM


New To Site? Need Help?

All times are GMT. The time now is 09:44 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