Worth buying a MFW-15 with a broken amp? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 7 Old 08-19-2013, 06:37 AM - Thread Starter
Senior Member
 
LowerFE's Avatar
 
Join Date: Dec 2009
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked: 35
Is it worth buying the AV123 MFW-15 with a broken amp for $200? How much work would it be to replace the amp? How much would a suitable amp cost? Would an external amp like this work well?

http://www.avshop.ca/sound-amp-pa-audio/amps/behringer-inuke-nu1000-ultra-lightweight-1000-watt-power-amplifier

Thanks
LowerFE is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 08-19-2013, 02:21 PM
AVS Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 15,891
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 106 Post(s)
Liked: 831
the mfw driver is quite similar to the Dayton dvc which runs about $120 or so iirc.

the mfw cabinet is ported, tuned to around 20hz, value depends on finish and what you think it is worth.

the external amp that you mention might have a little more power than the driver can take and it doesn't have a protective high pass filter (which would be advised). 4-500 watts would be a better match or the dsp version of the inuke1000 with the limiter set would be good too.

Listen. It's All Good.
LTD02 is offline  
post #3 of 7 Old 08-19-2013, 06:00 PM
Advanced Member
 
qguy's Avatar
 
Join Date: Dec 2008
Posts: 877
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked: 57
The question is......Did the driver break the amplifier? Is the driver still 100 percent ?
qguy is offline  
post #4 of 7 Old 08-20-2013, 06:17 AM - Thread Starter
Senior Member
 
LowerFE's Avatar
 
Join Date: Dec 2009
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked: 35
The driver is 100%. The amplifier is known to fail prematurely on the MFW-15
LowerFE is offline  
post #5 of 7 Old 08-20-2013, 07:02 AM
AVS Special Member
 
desertdome's Avatar
 
Join Date: Aug 2004
Location: Elkhorn, NE
Posts: 1,689
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Liked: 187
There isn't an internal amp that will fit the subwoofer. You need to add a block off plate to the back of the subwoofer and then buy an amp that has a limiter or high pass filter plus you need the ability to add some EQ. This requires the ability to take accurate measurements and may be beyond the scope of what you want to do. The two amps I would recommend are the Dayton SA1000 or the Behringer iNuke NU1000DSP.

AVS member Sandbagger sells a Turbo kit for the MFW-15 which includes a new driver and amplifier. You can then sell the used MFW-15 driver for around $75. This kit with the ported cabinet makes a great subwoofer. I used to own two of them.
desertdome is online now  
post #6 of 7 Old 08-20-2013, 11:54 AM - Thread Starter
Senior Member
 
LowerFE's Avatar
 
Join Date: Dec 2009
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked: 35
Are there cheaper amps? The only reason I'm considering this is to try to get a great performing subwoofer for really cheap (and without the hassle of DIY'ing an entire sub). I don't see a point in paying $800 for a turbo kit. For all that money and work, I'll just buy a completely new sub like the HSU VTF-15H which will be new, with warranty, and have around the same performance. I find $350 for an amp to be really expensive for a subwoofer repair like this. Is there something cheaper?
LowerFE is offline  
post #7 of 7 Old 08-20-2013, 12:53 PM
AVS Special Member
 
wwinkler's Avatar
 
Join Date: Jul 2009
Location: northern virginia
Posts: 1,315
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 20
Look at the plate amps at Parts Express to determine one that (approximately) fits.
wwinkler is offline  
Reply DIY Speakers and Subs

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

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