Tweeters? - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 19th January 2006, 01:04 AM   #1
diyAudio Member
 
Join Date: Jun 2005
Location: USA
Send a message via AIM to ThSpeakerDude88
Question Tweeters?

Well I have a pair of Sansui Sp-1500's that I have restored. I accidentally blew all four 1 inch metal dome tweeters one day while working under my desk. The amp was on and up half way and I accidentlly unplugged the source.. needless to say it fried all four coils.


I can't seem to find a set anywhere, I have checked ebay but without any luck. The tweeter domes themselves are easy to replace or recoil, but I have no idea where I would get replacment diaphragms, or if the domes can actually be recoiled.

They are 16 ohms each, run in paralell to equal 8 ohms.

I was thinking about getting four of these http://www.partsexpress.com/pe/showd...number=279-082

and wiring two in series in each cabinet to make 8 ohms.


I was wondering what your sugguestions are and what you think of this particular tweeter. Also, is there a way to be able to use 8 ohm tweeters in this? It would make tweeter selection a little easier, as I might be able to get some with replaceable diaphragms.


when I get replacment tweeters, especially if their originals, I am going to put inline fuses with them to prevent further mishaps!!

any reccomendations on what type of fuse to use also?
  Reply With Quote
Old 19th January 2006, 05:21 AM   #2
diyAudio Member
 
Join Date: Jun 2005
Location: USA
Send a message via AIM to ThSpeakerDude88
any ideas
  Reply With Quote
Old 19th January 2006, 07:22 AM   #3
Tomac is offline Tomac  Croatia
diyAudio Member
 
Join Date: Dec 2003
Location: Zagreb
Combination of two 8ohm drivers will give either 16 or 4 ohms , depends on way you wire them (but I guess you knew that). It is not a problem ,them being a different impendance, but this requires changing some values in crossover. That driver you gave link for seems ok and honestly I don't think these speakers deserve better than that. If the faceplate of driver and baffle cutout fit together I can't see a reason not to go for it. I guess the highpass filter is set high so any proper sounding tweeter would fit in. You only have to take care of sensitivity, don't know what was the sensitivity of original tweeters.
  Reply With Quote
Old 19th January 2006, 07:24 AM   #4
diyAudio Member
 
Join Date: Jun 2005
Location: USA
Send a message via AIM to ThSpeakerDude88
thats the one thing I was worried about, these speakers are very efficient. I believe 99db is what the old ad's say.

Maybe thats why they had two tweeters in each cab, to make it more efficient?

as long as they will sound like they did before I'll be happy, as they sound wonderful
  Reply With Quote
Old 19th January 2006, 09:48 AM   #5
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

8 ohm tweeters would be difficult use without modifications to the
crossover. In low efficiency speakers it would be possible to pad
the 8 ohm combo back to an eight ohm pair but in your case I don't
think this a sensible proposition.

Your proposition for the Peerless tweeters appears entirely sensible.
At that price opinions on the sound quality of the tweeter are pointless.
But I'd suggest they probably will be better than the old tweeters.

Fuses on tweeters I haven't seen for a long time.
I suggest you investigate Polyswitches.
If the Peerless units use ferrofluid they will be very robust.

/sreten.
  Reply With Quote
Old 19th January 2006, 02:08 PM   #6
diyAudio Member
 
Join Date: Jun 2005
Location: USA
Send a message via AIM to ThSpeakerDude88
alright, its only $35 so its not completly breaking the budget. Besides, if I come across an original pair on ebay later on I can grab them. Do you think sensativity will be an issue?

just a thought, but I can't seem to find many 4 ohm tweeters out there. Are there any others you can think of ?
  Reply With Quote
Old 19th January 2006, 02:47 PM   #7
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Quote:
Originally posted by ThSpeakerDude88
Do you think sensitivity will be an issue?
I'd be very surprised if it was, /sreten.
  Reply With Quote
Old 19th January 2006, 03:02 PM   #8
diyAudio Member
 
Join Date: Jun 2005
Location: USA
Send a message via AIM to ThSpeakerDude88
LOL ok. As long as I keep my 99db sensativity I'll be fine, as I like to use my lower wattage amps on these (because they sound so good!)

I am looking for a nice Marantz 2235b to power them so I want to keep the effiency.
  Reply With Quote
Old 20th January 2006, 02:08 AM   #9
diyAudio Member
 
Join Date: Jun 2005
Location: USA
Send a message via AIM to ThSpeakerDude88
Click the image to open in full size.

heres a pic of one of them, you can see the metal dome tweeters with their screens removed.

heres a pic w/ screens on.

Click the image to open in full size.
  Reply With Quote
Old 20th January 2006, 10:13 AM   #10
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

the two Peerless tweeters in series will pan out at 93dB/W.

in a 3-way speaker a 93dB/W tweeter would be used
with a 93dB/W midrange and a 99dB/W bass unit.
I'm presuming this is where your 99dB/W has come from.

A speaker with flat response and a genuine 99dB/W
midband sensitivity would need a 105dB/W bass unit.
I'm presuming this it not the case for your speakers.

/sreten.
  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
tweeters tonysherwin Swap Meet 0 22nd April 2008 01:16 PM
ESS AMT 1a tweeters BrettP Swap Meet 0 21st May 2006 07:59 AM
FS: Phy-Hp tweeters Sjef Swap Meet 2 29th October 2004 09:33 PM
tweeters....... ermes Multi-Way 1 17th May 2004 03:00 PM
Tweeters Vivek Multi-Way 13 23rd October 2001 11:06 AM


New To Site? Need Help?

All times are GMT. The time now is 11:05 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