Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

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 6th June 2005, 01:00 AM   #1
diyAudio Member
 
Madmike2's Avatar
 
Join Date: Apr 2005
Location: Toronto
Default Need assistance with Planar MId/tweet x-over

Ok i am in a bit over my head so i am going to stop modeling and ask for experience help

I built the cabinets already and here is a bad drawing of them.

Its a Morel 166 and the RT811 HiVi planar. Can anyone who has used the big mid planar help me out with a crossover here ??

And will impedance correction be required ? because in the models the Morel is sketchy in the frequency response.

Exacxt internal dimensions .4334 after displacement
Attached Images
File Type: jpg badpic.jpg (36.0 KB, 144 views)
__________________
Persistence is better then intelligence. Unless persistence kills you.
  Reply With Quote
Old 6th June 2005, 02:49 AM   #2
diyAudio Member
 
Madmike2's Avatar
 
Join Date: Apr 2005
Location: Toronto
bah i forgot to mention it is sealed.
__________________
Persistence is better then intelligence. Unless persistence kills you.
  Reply With Quote
Old 7th June 2005, 12:40 AM   #3
diyAudio Member
 
Madmike2's Avatar
 
Join Date: Apr 2005
Location: Toronto
Nobody use it before ?? Or should i move it to a more frequented section of loudspeakers ?
__________________
Persistence is better then intelligence. Unless persistence kills you.
  Reply With Quote
Old 11th June 2005, 10:35 PM   #4
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Is there a spec sheet/curves for the HiVi stuff anywhere??
post a link.

I don't like that company because I can't find out very much about their products even though the seem to spend money advertising. Can't figure out where they sell the stuff or who is buying it! Seems to not be in the USA??

Anyhow depending on all that detail, a few comments:

- Morel is NG for bass (no excursion)
- nice for mid bass/ mids
- but low sensitivity

So, depending on what the HiVi thingie is/does for sensitivity you'll probably end up having to pad it down to meet the Morel.

No matter what it will make sound.

I'd run in box test curves using an inexpensive measurement mic and ur existing computer sound card + freeware that tests speakers. Then see what you get back... check 10, 20, 20 degrees off axis and see how they compare in level especially in the range where you might xover...

This should show you where you want to put the xover.

Look at what the mfr of the HiVi spec's for the xover slope too. This may dictate many choices.

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 11th June 2005, 10:59 PM   #5
diyAudio Member
 
Madmike2's Avatar
 
Join Date: Apr 2005
Location: Toronto
http://www.swanspeaker.com/product/htm/view.asp?id=18

thats the most info you get i have them ordered from solen. This particular speaker they dont sell much all the other ribbons they do sell. This one is too big apparently and not big as in long.

We will see i guess if it is any good. If not its a lesson learned. Only place i have ever heard them and that was in a soup of noise was at the Metro Convention Center.
__________________
Persistence is better then intelligence. Unless persistence kills you.
  Reply With Quote
Old 12th June 2005, 03:30 PM   #6
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
I think you'll need a 4th order @ ~2kHz.

Then measure what the combo does, and adjust the roll off/freq of the Morel to get the best compromise in the xover's area and to your ear.

You'll certainly need to pad the tweeter on the order of 6-10dB depending on what the actual unit measures.

The tweeter requires no impedance compensation at all.
The woofer may or may not, measure it's impedance with and without the xover in place (important).

I'd likely consider putting a low Q inductor in series with the tweeter, since it rises slightly accoring to their measurements, but that may or may not be audible to your ears, or an accurate measurement.

That would be an inductor with a resistor in parallel placed in series with the driver after the xover. The purpose is to tilt the curve slightly downwards from the mid range out to the HF region, making the >5-7 kHz region equal or lower than the 3kHz area to taste.

You can hear these sorts of changes using pink noise as the source and dorking the "change" in and out.

When you build the speaker, you'll know you have the relationship between the morel and the tweetie right when you listen on pink noise and can not detect either driver being dominant. This is a good test even without test gear on hand.

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 12th June 2005, 08:55 PM   #7
diyAudio Member
 
Madmike2's Avatar
 
Join Date: Apr 2005
Location: Toronto
Well familiar with pink noise love the stuff. Her names Amanda.

So the sketchy characteristics in the model are do to impedance variances (for the Morel) ? I figured the tweeter would need to be castrated a bit. Ill order the extra components you mentioned and when ready harass someone who has crossobver design software to cook me up a schematic Thank you Bear. We will hear what we hear.
__________________
Persistence is better then intelligence. Unless persistence kills you.
  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
To tweet or not to tweet? pforeman Full Range 2 7th April 2009 07:30 PM
Tweet, tweet! weinstro Multi-Way 8 19th October 2007 09:29 AM
Please help me identify this tweet!!! safetyman Multi-Way 2 18th December 2005 06:33 AM
Anyone measured the PE 269-788 Tweet? SmarmyDog Multi-Way 0 1st October 2005 05:18 PM
B'horn Super Tweet? Jhovis Multi-Way 4 22nd May 2004 06:56 AM


New To Site? Need Help?

All times are GMT. The time now is 10:18 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