Is it worth buying cheapy 15" driver or expensive 12"? - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 20th February 2005, 03:31 PM   #1
VEC7OR is offline VEC7OR  Lithuania
diyAudio Member
 
VEC7OR's Avatar
 
Join Date: Jul 2003
Location: Vilnius
Send a message via Skype™ to VEC7OR
Default Is it worth buying cheapy 15" driver or expensive 12"?

My friend bought a prebuilt sub, as one can expect it sounded not the best...

Other thing that 15" driver in that box costs mere 60 bucks... (165 litas in our money)

Driver itself looks not too bad, suspension is faily soft (means it has to be more or less efficient, and probably has low Fs) stamped basket, vented pole piece, big magnet, makes enough bang from 40W ampilifier.

The one in the lower pic.
http://www.e-xinghui.com/2004c16.htm

Driver comes with no parameters I haven't measured Vas or Qts, but measured its Fs - 25-27Hz and estimated that Fs/Qts > 50 - box is ported, and blocking the port doesnt make it sound better.

The question what can I expect from that kind of unit ? (what parameters it will have most likely?)

Is ir worth buying it or going for LAB12 (150$ or 800 litas here) ?

My aim here is more lower end extension, I know I can make LAB go to 20'ies but 15" has more Sd and will do it with more ease.

What are your experiences with cheapy drivers ?
__________________
Profanity took a very interesting form in Russia where there exists a language of sorts, most of its words based on four basic profane roots - nouns p...is, wh.0.e, c..t and verb f..k. It is possible to sensibly communicate using just these four basic roots.
  Reply With Quote
Old 21st February 2005, 07:10 AM   #2
simon5 is offline simon5  Canada
diyAudio Member
 
Join Date: Nov 2004
Location: Québec, Québec
There's some cheap drivers performing well, like the Dayton line... but you get what you pay for.

If you can measure the rest of the parameters, you could build probably something good with it.

For a subwoofer it's like 50% for the box and 50% for the driver. If the Fs is around 25 Hz, you can do something acceptable.
__________________
DIYaudio for President !
  Reply With Quote
Old 22nd February 2005, 04:32 PM   #3
diyAudio Member
 
paulspencer's Avatar
 
Join Date: Sep 2003
Location: Melbourne, Australia
Looks like car audio drivers, probably with a tiny xmax, in which case you won't really get much bang for buck.

If you don't have TS parameters, you must use a sealed box, hence you give up about 6db of output. This in itself is like stepping down from a 15" to a 10" driver, all other things being equal!

If you want bang for buck, consider what amp you will need and how much excursion the driver has. The best bang for buck drivers will work with a 350w amp which will allow you to use ~20mm of xmax.

If you spend 50% as much on a cheap driver, and get 20% of the output, with a less accurate driver, then I would not call it a good buy!
  Reply With Quote
Old 22nd February 2005, 07:24 PM   #4
diyAudio Member
 
Join Date: Jan 2005
Location: Rotterdam, NL
Quote:
Is ir worth buying it or going for LAB12
I would definitely say the Lab12.

For low end extension Xmax is one of the most important factors. If you look at the magnet weight of the Lab12 you'll notice that it's about two times heavier. That doesn't say it all. But it does point out that the Lab12 has a much bigger motor on a smaller cone and thus will definitely outperform the 15" big time.

Also the Lab12 is a subwoofer made for professional applications (which requires outstanding reliability and warranty) and has been optimized over time. While the 15" is just a speaker out of so many, with a manufacturer not even bothering to give the T/S-parameters (most of the times that's a bad sign).

The 15" has an bigger Sd, but if the Xmax is substantially lower it will still perform less because in the end it's about the Vd (Xmax x Sd).
Also the 15" will probably be not as stiff as the 12" since that's harder to obtain with the diametre increasing.

Btw. 60 bucks = 165 litas, while 150 bucks is 800 litas?? Logarithmically scaled money

Mvg Johan
  Reply With Quote
Old 23rd February 2005, 04:40 AM   #5
diyAudio Member
 
paulspencer's Avatar
 
Join Date: Sep 2003
Location: Melbourne, Australia
Lab12 driver is probably better than that 15" woofer, but I think you can do better than this driver at that price. I'd be looking at the Atlas 12" or TC sounds 2+. Lab12 is a great driver for the horn sub it's designed for, which doesn't need a lot of excursion but needs a high thermal power handling since it's often driven by amps with 1kw of power. The excursion is a little low at 13mm xmax, although I will admit the inductance is very good for a 12" driver at under 1.5mH. The Atlas 12 on the other hand has a lower inductance (meaning better transient response) at 0.86 mH and a bigger xmax - 18mm. The Atlas also costs the same and being a 4 ohm driver rather than 6, it will make better use of amplifier power.
  Reply With Quote
Old 25th February 2005, 10:59 AM   #6
VEC7OR is offline VEC7OR  Lithuania
diyAudio Member
 
VEC7OR's Avatar
 
Join Date: Jul 2003
Location: Vilnius
Send a message via Skype™ to VEC7OR
Thanks for reply guys.

I'm also considering Tempest but...

[steam realease valve open]

I'm ******* pissed off...

LAB12 costs 150$ - but no! all over europe they ask ~250 Euro for it, shipping such a beast from USA will cost too much most likely...

Tempest is 150$ too, - nope - in Sweden its ~317 Euro( 407$), cheapest I could find was 240 Euro(308$) - am I missing a point here ?

WTF is with the prices ?

Talk about logarithmically scaled money ...

[steam realease valve closed]

How much will it cost to ship 40lb somewhere in europe ?
__________________
Profanity took a very interesting form in Russia where there exists a language of sorts, most of its words based on four basic profane roots - nouns p...is, wh.0.e, c..t and verb f..k. It is possible to sensibly communicate using just these four basic roots.
  Reply With Quote
Old 25th February 2005, 01:02 PM   #7
diyAudio Member
 
Mutley666's Avatar
 
Join Date: Nov 2004
Location: Sunny Birmingham
Hi VEC7OR,

I live in Europe and am pretty well p****ed off with the pricing of audio stuff over her too.

I have ordered an awful lot of stuff the the US though and shipping for approx 40lbs will cost you about $140 - $160 to this side of the water.

If you looking for a Eminece LAB12 you may want to have a look at the following link to BK Electronics, they are base in the UK and sell the LAB12 for £127.37 (or apprx EU180) and the shipping will probably be alot cheaper.

http://www.bkelec.com/

(Look under Professional Audio)

Good luck with the project.
  Reply With Quote
Old 26th February 2005, 10:09 PM   #8
VEC7OR is offline VEC7OR  Lithuania
diyAudio Member
 
VEC7OR's Avatar
 
Join Date: Jul 2003
Location: Vilnius
Send a message via Skype™ to VEC7OR
OK its set, I'll go for LAB 12, probably its the best I could ever get here, comparing price, quality, box size (Tempest is nice but 250l box is er, BIG , sure we can use smaller box, linkwitz transform it, but I don't wan't building/buying 700W amp for it)

I've inquered eminence.nl, they said it costs 126 Euro for the LAB 12

Lab 12 wil cost you Euro 126,--
Transportcost wil be Euro 47,--

Speaker is in stock
delivery in 2 days after shipping

Thats niiiice, in couple of month I'll sell mine bandpass - my ears grown over it and buy the LAB unit, it'll make a nice vented sub in 125l box, flat right to 24Hz and puttin' out 110dB not including room gain, BTW I'm scared - that thing can probably shatted windows in my room
Most probably it'll be the loudest sub on teh block friend of mine has Polk 10", everyone else sits around with "Multimedia PC speakers"...
__________________
Profanity took a very interesting form in Russia where there exists a language of sorts, most of its words based on four basic profane roots - nouns p...is, wh.0.e, c..t and verb f..k. It is possible to sensibly communicate using just these four basic roots.
  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
Need advice on buying new "old" cd player S.Spielbergo Digital Source 31 4th December 2008 11:20 AM
Worth doing cheap "thermal protection fuses" in hot amps? cfcubed Pass Labs 4 15th June 2008 02:27 AM
Please answer fast! Is it worth buying a 1960s 18" guitar cab for a subwoofer VvvvvV Multi-Way 6 21st May 2005 09:57 AM
"Visaton - is it worth?" or... "Share your Visaton experience" mr_push_pull Multi-Way 10 7th August 2004 06:18 PM
Found Lowe's in Ft.Worth selling "sonotubes" (price is good) Westrock2000 Multi-Way 2 27th October 2002 11:53 AM


New To Site? Need Help?

All times are GMT. The time now is 08:21 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