NEW MFW-15 amps (May 2010) *pics* - Page 70 - AVS Forum
Forum Jump: 
 7Likes
Reply
 
Thread Tools
post #2071 of 2621 Old 10-19-2011, 12:31 PM
Newbie
 
razafina's Avatar
 
Join Date: Feb 2008
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
My mfw15 has a sealed chamber where the amp plate goes, it only has a small hole about 3/4" were wire goes to driver and Q adjustment board.
razafina is offline  
Sponsored Links
Advertisement
 
post #2072 of 2621 Old 10-19-2011, 01:52 PM
Advanced Member
 
sandbagger's Avatar
 
Join Date: Dec 2001
Location: Detroit Rock City
Posts: 929
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 20
Those holes are not well sealed if at all.....

Quote:
Originally Posted by razafina View Post

My mfw15 has a sealed chamber where the amp plate goes, it only has a small hole about 3/4" were wire goes to driver and Q adjustment board.


Kevin
----------
Motor City Custom Audio
Bringing you Custom subwoofer kits, with flames if you want
Onix and Melody Valve Hi Fi Audio Dealer serving the Midwest and Canada
sandbagger is offline  
post #2073 of 2621 Old 10-19-2011, 02:13 PM
Newbie
 
razafina's Avatar
 
Join Date: Feb 2008
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I guess I will be using spray foam to seal the cavity. So I can do what I think I can do.
razafina is offline  
post #2074 of 2621 Old 10-20-2011, 03:45 PM
AVS Club Gold
 
mak99's Avatar
 
Join Date: Apr 2006
Location: seattle/renton, wa
Posts: 1,453
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 14
Quote:
Originally Posted by razafina View Post

I guess I will be using spray foam to seal the cavity. So I can do what I think I can do.

I'd think twice before cutting all those holes into your cabinet! How about a small fan outside the sub, blowing across the plate amp? My old v2 amp also got quite warm during use, and lasted about a year before humming off into the sunset.

Cutting those holes would surely ruin any potential resale value, or make it difficult to upgrade to a Turbo or other future MCCA plate amp...

still one of my favorite bumper stickers of all time...

FREE TIBET! *
* with purchase of equal or lesser Tibet
mak99 is offline  
post #2075 of 2621 Old 10-20-2011, 04:03 PM
AVS Special Member
 
NicksHitachi's Avatar
 
Join Date: Jul 2007
Location: Wilmington, NC
Posts: 3,445
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Liked: 90
Quote:
Originally Posted by razafina View Post

My V2 amp vented a cap near a choke or coil, it was 22uf or 470uf at 100V(I have to check again and verify), I think is the pre audio board not the power supply and output board driver. I replace it and the other caps mention and its back and running. I will problably be putting a fan on the bottom by raising the bottom, making a hole for a fan(3" to 4" like computer fan) that will be install in the bottom. And making a couple of holes on the side to vent the hot air and help keep the amps components cool.

A passive option would be best. I have often thought of ordering some heat sink and mounting it to the back where the hottest components are. This would be the easiest and should provide enough cooling for that amp.

I have since converted a pair of original MFWs to sealed to work with 4 other sealed MFWs for a total of 6. I'll say 2 or 4 sealed do a good job in my room down to 10, and 6-8 are perfect.

Converting these cabinets to sealed is pretty easy, I pulled amp and top circuit board sealed up holes and port slot inside. Net volume is a bit large I prefer the 2.5ft3 per driver I designed but the ~3ft3 per driver of the original MFW does fine. Excursion is less controlled than I like, I can't beat on them quite as hard as I can the ones I built.

Anyways its an option for those with multiples if you run out of amps. About 250W per driver is plenty. I don't think many people would be happy with just one sealed in any room.....

Don't waste time reading signatures.....
NicksHitachi is offline  
post #2076 of 2621 Old 10-20-2011, 04:07 PM
Newbie
 
razafina's Avatar
 
Join Date: Feb 2008
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Ok, the fan would be blowing the internal hot air, The purpose is to cool off by using external cooler air. I am also thinking about turning the boards and the transformers from internal to external and fabricating a pexiglass or metal cage. I would be using the same threaded hole that are use for the boards and the transformer. I think that will be a better alternative, than cutting holes and I can mount a circuit that will come on when ever it gets more that say 90 degrees inside the fabricated cage. What do you guys think.
razafina is offline  
post #2077 of 2621 Old 10-23-2011, 07:52 PM
Newbie
 
richlgilbert's Avatar
 
Join Date: Apr 2010
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
All - I just wanted to post how helpful Murrel is to resolve issues with the MFW15's. Thanks for all you do!
richlgilbert is offline  
post #2078 of 2621 Old 10-30-2011, 03:08 AM
Member
 
NumLock's Avatar
 
Join Date: Mar 2008
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I ordered one of Murrel's V3 amps a few days ago. I hope it comes in soon!
NumLock is offline  
post #2079 of 2621 Old 10-31-2011, 05:39 PM
Senior Member
 
trekker's Avatar
 
Join Date: Nov 2002
Location: Phoenix Metro
Posts: 289
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
I had placed my order for (3) V3 amps the first week of Oct and I just received the FedEx shipping notice. Not too long of a wait. :-)
trekker is offline  
post #2080 of 2621 Old 11-04-2011, 09:42 PM
Newbie
 
cbtbackflow's Avatar
 
Join Date: Nov 2011
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
How did they turn out? I just ordered one...
cbtbackflow is offline  
post #2081 of 2621 Old 11-04-2011, 10:43 PM
Senior Member
 
GobbityGotz's Avatar
 
Join Date: Apr 2005
Posts: 261
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 17
Got my V3 today. Easy install and runs much cooler than my past v2's( i went through 2 of them). haven't had a chance to crank it because the kid was sleeping already but should get to drive it hard this weekend. Thanks Murrel! Celebrated with a can of Ten Fidy.

My life is set at reference level.
GobbityGotz is offline  
post #2082 of 2621 Old 11-05-2011, 04:31 AM
Member
 
NumLock's Avatar
 
Join Date: Mar 2008
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I got my shipping notice! I can't wait until it gets here. Time to buy some new movies.
NumLock is offline  
post #2083 of 2621 Old 11-05-2011, 06:52 AM
Senior Member
 
murrel's Avatar
 
Join Date: Aug 2009
Location: Longmont, Colorado
Posts: 398
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 14
Quote:
Originally Posted by GobbityGotz View Post

Got my V3 today. Easy install and runs much cooler than my past v2's( i went through 2 of them). haven't had a chance to crank it because the kid was sleeping already but should get to drive it hard this weekend. Thanks Murrel! Celebrated with a can of Ten Fidy.

You are welcome!

And I am glad that you enjoy our beer!

Have a great weekend!
Murrel

Murrel J Gray
 

murrel is offline  
post #2084 of 2621 Old 11-11-2011, 04:23 PM
Advanced Member
 
centauro74's Avatar
 
Join Date: Jun 2007
Location: New Jersey
Posts: 603
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 13
Anyone interested in selling a sub, my friend keep asking me to buy one of mine. He lives in NJ.

centauro74 is online now  
post #2085 of 2621 Old 11-11-2011, 04:40 PM
Member
 
tjwashow's Avatar
 
Join Date: Jun 2009
Posts: 59
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
murrel is very helpful when it comes to these things! My amp just crapped on me and murrel is about a month and a half wait he said, so i am going external amp behringer inuke 1000dsp. We chatted and he suggested it so heck yea im going to try. Ill let you know how it turns out.
tjwashow is offline  
post #2086 of 2621 Old 11-11-2011, 05:55 PM
AVS Special Member
 
NicksHitachi's Avatar
 
Join Date: Jul 2007
Location: Wilmington, NC
Posts: 3,445
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Liked: 90
Quote:
Originally Posted by tjwashow View Post

murrel is very helpful when it comes to these things! My amp just crapped on me and murrel is about a month and a half wait he said, so i am going external amp behringer inuke 1000dsp. We chatted and he suggested it so heck yea im going to try. Ill let you know how it turns out.

probably not a bad plan, someone could probably get a good working set of filters with a little effort and a measurement rig.... Prob want to high pass at like 15-19hz though to keep out of trouble with excursion......

Don't waste time reading signatures.....
NicksHitachi is offline  
post #2087 of 2621 Old 11-13-2011, 02:24 AM
Member
 
NumLock's Avatar
 
Join Date: Mar 2008
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Thanks Murrel! I finally installed my V3 amp tonight. Here are some pics.
LL
LL
LL
LL
LL
NumLock is offline  
post #2088 of 2621 Old 11-13-2011, 02:31 AM
Member
 
NumLock's Avatar
 
Join Date: Mar 2008
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I had to make a adapter cause my V1 amp uses bullet connectors while the V3 uses spade connectors.


V1 amp on top, V3 amp on the bottom:








Ready!

NumLock is offline  
post #2089 of 2621 Old 11-13-2011, 05:38 AM
AVS Special Member
 
yadfgp's Avatar
 
Join Date: Oct 2006
Location: Meridian, Idaho
Posts: 2,040
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked: 35
Anyone interested in a couple of MFW's with the v3 amps in em?

http://emotivalounge.proboards.com/i...d=20824&page=1

1 Mitsubishi WD-82642 82" TV
1 Onkyo TX-NR929 11.4 setup
2 Emotiva XPA-5's
1 Emotiva XPA-100
1 Definitive Technology CLR 3000 (Center)
2 Definitive Technology BP2004TL's (Mains)
2 Definitive Technology ProMonitor 1000's (Heights)
6 Definitive Technology BPX's (Rears Wides Sides)
4 CHT VS-18.1 Subs
yadfgp is offline  
post #2090 of 2621 Old 11-13-2011, 06:27 AM
Senior Member
 
murrel's Avatar
 
Join Date: Aug 2009
Location: Longmont, Colorado
Posts: 398
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 14
Quote:
Originally Posted by NumLock View Post

Thanks Murrel! I finally installed my V3 amp tonight. Here are some pics.

Very nice pictures! I am glad all is working well! Also good to see that that Fed Ex is getting the amps to you with little or no damage to the box!


Thanks
Enjoy!

Murrel

Murrel J Gray
 

murrel is offline  
post #2091 of 2621 Old 11-13-2011, 07:02 AM
AVS Special Member
 
HuskerHarley's Avatar
 
Join Date: Aug 2001
Location: Lincoln,Neb
Posts: 1,461
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by NumLock View Post

I had to make a adapter cause my V1 amp uses bullet connectors while the V3 uses spade connectors.

Great pics.


Murrel

Any chance you can include the adapters, with the 4 V3's I ordered from you, in case mine use bullet connectors as well?

HH
HuskerHarley is offline  
post #2092 of 2621 Old 11-13-2011, 09:34 AM
Senior Member
 
murrel's Avatar
 
Join Date: Aug 2009
Location: Longmont, Colorado
Posts: 398
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 14
Quote:
Originally Posted by HuskerHarley View Post

Great pics.


Murrel

Any chance you can include the adapters, with the 4 V3's I ordered from you, in case mine use bullet connectors as well?

HH

Sure can. I will do my best to remember. Your amps hopefully will be in my shop for my testing sometime next week.

have a great day
murrel

Murrel J Gray
 

murrel is offline  
post #2093 of 2621 Old 11-19-2011, 05:17 PM
 
streamerlover's Avatar
 
Join Date: Dec 2010
Posts: 933
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Wouldn't have been easier to just clip the bullet ones from the woofer and add female spades there? Or was length the issue?
streamerlover is offline  
post #2094 of 2621 Old 11-19-2011, 05:31 PM
Senior Member
 
MTAtech's Avatar
 
Join Date: Nov 2006
Posts: 227
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Quote:
Originally Posted by streamerlover View Post

Wouldn't have been easier to just clip the bullet ones from the woofer and add female spades there? Or was length the issue?

Women tell me "length doesn't" matter.
MTAtech is offline  
post #2095 of 2621 Old 11-19-2011, 06:05 PM
Senior Member
 
Down's Avatar
 
Join Date: Mar 2005
Location: Scottsdale, AZ
Posts: 491
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked: 11
Just received my V3 amp recently and went to install it. Is there an easier way to deal with the bullet to spade connection issue than just cutting the bullets off the driver wires and slapping on some spade connectors?

Also, thought I'd share a pic of my old amp. It went out with a bang as you can see.
LL
Down is offline  
post #2096 of 2621 Old 11-20-2011, 06:15 AM
Senior Member
 
murrel's Avatar
 
Join Date: Aug 2009
Location: Longmont, Colorado
Posts: 398
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 14
Quote:
Originally Posted by Down View Post

Just received my V3 amp recently and went to install it. Is there an easier way to deal with the bullet to spade connection issue than just cutting the bullets off the driver wires and slapping on some spade connectors?

Also, thought I'd share a pic of my old amp. It went out with a bang as you can see.

Please make sure that your driver is not damaged, would hate to see you damage the new amp.

Murrel

Murrel J Gray
 

murrel is offline  
post #2097 of 2621 Old 11-20-2011, 08:28 AM
Senior Member
 
Down's Avatar
 
Join Date: Mar 2005
Location: Scottsdale, AZ
Posts: 491
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked: 11
Quote:
Originally Posted by murrel View Post

Please make sure that your driver is not damaged, would hate to see you damage the new amp.

Murrel

How exactly would I know whether the driver was damaged?
Down is offline  
post #2098 of 2621 Old 11-20-2011, 12:40 PM
Senior Member
 
murrel's Avatar
 
Join Date: Aug 2009
Location: Longmont, Colorado
Posts: 398
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 14
Quote:
Originally Posted by Down View Post

How exactly would I know whether the driver was damaged?

Gently with both hands push the driver in and out. Make sure it moves freely with no resistance.

Murrel

Murrel J Gray
 

murrel is offline  
post #2099 of 2621 Old 11-20-2011, 02:06 PM
Member
 
NumLock's Avatar
 
Join Date: Mar 2008
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by streamerlover View Post

Wouldn't have been easier to just clip the bullet ones from the woofer and add female spades there? Or was length the issue?

I wanted to fix my old amps just for fun so I left the bullet connector on there.
NumLock is offline  
post #2100 of 2621 Old 11-20-2011, 02:35 PM
AVS Special Member
 
NicksHitachi's Avatar
 
Join Date: Jul 2007
Location: Wilmington, NC
Posts: 3,445
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Liked: 90
Quote:
Originally Posted by murrel View Post

Gently with both hands push the driver in and out. Make sure it moves freely with no resistance.

Murrel

Or you could just hook up your nice new amp and if you see smoke, its probably bad......

Don't waste time reading signatures.....
NicksHitachi is offline  
Reply Subwoofers, Bass, and Transducers

Tags
Amplifier Speaker

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