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 14th December 2006, 11:46 AM   #11
diyAudio Member
 
Join Date: Apr 2003
Location: Toulouse, France
Send a message via MSN to usa_satriani
Quote:
Originally posted by panomaniac
Hi,
You've got some good choices there. The BMS drivers are well liked by many on the web. I've never heard them, but they sure get rave reviews.

Don't forget about used drivers. You can often find used JBL or Altec horns and drivers at good prices. I'm very happy with my Altec 811 horns and 806 drivers. You may be able to find them or something like them for less than the cost of the new stuff. And if you don't like them, they are easy to resell.


BTW, I used to live in Toulouse - not too far from the airport. On the north side of town in the section called "les Minimes". A very long time ago. Cool town, Toulouse!
Hi,

Yes I got good feedbacks on the BMS 4592ND and the price is fair. The Beyma has some good feedbacks too you must add a tweeter and Scott said that a Titanium diaphragm is not so good.
So there is also the Radian but I must say that I find the measurements from their documentation quite weird...

I don't know about used drivers, I would be affraid of getting a damaged one. 4-500$ for a good new 2" driver seems fair to me.

Yeah Toulouse is a cool city, I prefer living here than in Paris. I live in "Rangueuil". Donc tu parles français ?

Merci.
__________________
"That's why we like you Mulder. Your ideas are weirder than ours."
  Reply With Quote
Old 14th December 2006, 11:58 AM   #12
diyAudio Member
 
Join Date: Apr 2003
Location: Toulouse, France
Send a message via MSN to usa_satriani
Quote:
Originally posted by ScottG
In your situation I'd prob. purchase the Radian.. and try-out a passive 1st order filter for the super-tweeter anywhere between 12 kHz and 22 kHz. (..and the pasive parts value will be cheap because the cap (if parallel) will be small.)

Consider some cheap transformer attenuators (transformer volume control 8 ohm 10+ watts) to lower the eff. of the drivers to match the rest of your drivers. Despite the effects of core hystersis, it works a LOT better than using resistance for padding down more than 3 db. (..most are stereo - just use one "leg" of the stereo volume control for the driver.) [/B]
I must say that I am quite seduced by the BMS because it can work without a tweeter and the frequency response published by Radian is not very sexy. The 850PB seems to be much flater.

I got Fostex L-Pad attenuators, I don't know if you think they would be OK. I thought it was just an adjustable resistance...
I'm gonna check stereo attenuators on google.

Thanks again, Greg.
__________________
"That's why we like you Mulder. Your ideas are weirder than ours."
  Reply With Quote
Old 14th December 2006, 12:10 PM   #13
316a is offline 316a  England
diyAudio Member
 
316a's Avatar
 
Join Date: Dec 2002
Location: West London
Hi ,
Sorry I'm late . What's wrong with Tad ? I got my TD4001 second hand for £450 the pair . You can pick up units with blown diaphragms much cheaper and reload with Radian replacements for around the same cost . Probably a lot cheaper than the BMS co-ax I seem to remember the UK distributor Adam Hall was quite literally asking an arm and a leg for the BMS

cheers

316A
  Reply With Quote
Old 14th December 2006, 12:14 PM   #14
diyAudio Member
 
Join Date: Apr 2003
Location: Toulouse, France
Send a message via MSN to usa_satriani
If you can get me a pair of TADs for £450, I am in !
__________________
"That's why we like you Mulder. Your ideas are weirder than ours."
  Reply With Quote
Old 14th December 2006, 03:07 PM   #15
316a is offline 316a  England
diyAudio Member
 
316a's Avatar
 
Join Date: Dec 2002
Location: West London
Hi ,
You can pick them up for $650 a pair in the US , factor in duty and shipping and it's around the £450 mark . Cheapest I've seen was $350 for a pair with blown diaphragms , use Google to find them Parts Express do the Radian replacements .


cheers

316a
  Reply With Quote
Old 14th December 2006, 07:55 PM   #16
danielm is offline danielm  United States
diyAudio Member
 
Join Date: Dec 2006
Quote:
Originally posted by panomaniac
Are the X-Tealth drivers made by P.Audio?
Yes. However, I believe the X-tealth are a bit less expensive.

The 1500 (1.4) and 2000 (2") are both excellent for the money.
Same driver other than the extended throat for 2" flares.

After listening to electostatics at home for the past twenty+ yrs, this one one of the few pro HF drivers I could stand. Very smooth, extended.
  Reply With Quote
Old 14th December 2006, 11:19 PM   #17
ScottG is offline ScottG  United States
diyAudio Member
 
Join Date: Feb 2003
Location: US
Used drivers can be quite good - especially for specialized use. (..consider that true midrange compression driver from all but BMS are quite expensive today.)

The problem with purchasing used however is magnet field strength (beyond replacing a diaphram). Magnet Flux can and often does decrease over time. This can alter the freq. response and in particular makes pair matching *difficult*. Prob. not something for a novice to get into. Additionally, there is NO advantage to a lower cost TAD driver than the Be diaphram (..and some have mentioned the diaphram isn't neccesarily an advantage either).

This loss in field strength over time is a significant factor for preferring neo motors over all others (..excepting field coils of course). The magnetic hysterisis is another factor for recommending them (similarly to Alinco).

If you like the BMS co-axial - then by all means get it. Just remember though that you may need some measurment capability to get the best from the driver with regard to crossovers. (..and of course the Behringer has this automated.)

btw, I don't know what the pricing in Europe is.. but in the US its this:

http://www.assistanceaudio.com/02_bms.html#pricing
__________________
perspective is everything
  Reply With Quote
Old 15th December 2006, 01:50 AM   #18
diyAudio Member
 
Join Date: Aug 2006
My favorite is a P.Audio PA-D99 2" compression driver, Fantastic sound, Its up there with the JBL and EV drivers that I use to use but at 1/2 the cost.

The P. Audio BM D750 is not in the same league, but is much cheaper and is great value/ quality for the price.
  Reply With Quote
Old 15th December 2006, 11:21 AM   #19
diyAudio Member
 
Join Date: Apr 2003
Location: Toulouse, France
Send a message via MSN to usa_satriani
Quote:
Originally posted by ScottG
Used drivers can be quite good - especially for specialized use. (..consider that true midrange compression driver from all but BMS are quite expensive today.)

The problem with purchasing used however is magnet field strength (beyond replacing a diaphram). Magnet Flux can and often does decrease over time. This can alter the freq. response and in particular makes pair matching *difficult*. Prob. not something for a novice to get into. Additionally, there is NO advantage to a lower cost TAD driver than the Be diaphram (..and some have mentioned the diaphram isn't neccesarily an advantage either).

This loss in field strength over time is a significant factor for preferring neo motors over all others (..excepting field coils of course). The magnetic hysterisis is another factor for recommending them (similarly to Alinco).

If you like the BMS co-axial - then by all means get it. Just remember though that you may need some measurment capability to get the best from the driver with regard to crossovers. (..and of course the Behringer has this automated.)

btw, I don't know what the pricing in Europe is.. but in the US its this:

http://www.assistanceaudio.com/02_bms.html#pricing

Hey Scott,

you explained why I am not to much into buying used speakers, you can also add that PA components are often used roughly and you don't know how the previous owner took care of them...

I own Fostex T90A tweeters : http://www.madisound.com/pdf/fostexdrivers/t90arev.pdf
They are 106db/w efficient, so I think I would have to use an attenuator for the compressions.
http://www.madisound.com/cgi-bin/ind...t_id%%&pid=316
I think a first order crossover would be ok at about 7-8 Khz, what do you think ?
But yeah I would need to do some measurements.

I am doing digital filtering with my soundcard. If I want to add a way I will have to upgrade the soundcard. I will do it but not right now, so at first the tweeter will be passive. I also think that there is much more improvement in doing active filtering with loud frequencies. If I get the coax BMS I might also use their "tweeter".

Btw, which PA tweeter ? JBL 2405h ? 2402H ?

Greg.
__________________
"That's why we like you Mulder. Your ideas are weirder than ours."
  Reply With Quote
Old 15th December 2006, 12:38 PM   #20
diyAudio Member
 
Brett's Avatar
 
Join Date: Jan 2002
Any of the BMS coaxes. Been using the 4590's since 01/02 until I moved into smaller digs and had to store the horns.

Try tractrx or oblate spheroid flares.
  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
1" compression drivers with 2" diaphragms 454Casull Multi-Way 24 9th August 2009 04:19 PM
Keele, D. (2004) "Maximum efficiency of compression drivers" svenr Multi-Way 3 28th October 2007 02:03 PM
21" Bass Drivers and Beyma Compression Drivers Magnetar Swap Meet 0 19th November 2006 02:42 AM
Good 2" compression drivers? imix500 Multi-Way 12 6th July 2005 06:01 PM


New To Site? Need Help?

All times are GMT. The time now is 04:45 AM.


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