Hey guys, I’m almost done refinishing my MMATS LM2075 amp. Here are some pics up until this point...


Pretty scratched up

http://mikeweb.atnet.ca/tmp/mmats/IMG_0261.JPG


Sanded it down

http://mikeweb.atnet.ca/tmp/mmats/IMG_0314.JPG


I repainted it metallic silver w/ clear coat (stupid of me)

http://mikeweb.atnet.ca/tmp/mmats/IMG_0370.JPG


I then decided to strip it down to the aluminum and buff / polish it. Here I am sandblasting that mofo [img]tongue.gif[/img]

http://mikeweb.atnet.ca/tmp/mmats/IMG_0487.JPG


Here's the amp after sandblasting.. It’s looking much nicer, plus it will now dissipate heat better as well.

http://mikeweb.atnet.ca/tmp/mmats/IMG_0492.JPG
http://mikeweb.atnet.ca/tmp/mmats/IMG_0493.JPG

Here it is after some sanding 300 - 1500 grit. I also painted between the fins since I like the look of it. I still need to buff / polish.

http://mikeweb.atnet.ca/tmp/mmats/IMG_0496.JPG


My question is should I leave the fins black or sand the top of them down so that there silver in color?

[ June 15, 2003, 09:48 PM: Message edited by: The Professor ]

Looks good.....did you get a chance to use it yet? hope everyhting worked fine..seeing as i sold it to you :D

also....i have another mmats....how much would you charge to do the same for mine?

looks awesome mike, I think you should leave it the way it is, it should look good in the install ;)

Kriston

I love how it's the same colour underneath as you painted it before... sounds like something i would do. I think sanding the tops of the fins and leaving the crevaces black would look sweet.

how much do you charge???

my buddy just got a kicker amp and it has some chips in it. What would be the best way to refinish it? I dont know where I could find access to a sandblasting machine and im thinking he would want the amp painted a glossy black or atleast have that be the color.

Any ideas?

Looks awesome, leave it black I say..... [img]graemlins/thumb.gif[/img]

Leave it!

Nicely done [img]graemlins/thumb.gif[/img]

that looks good, do you have other amps?

Cool to make them match.

Pridefcf: Naw, I haven’t installed it yet although I tried it out, although I still have to get the missing screw from MMATS as well as the others since there pretty worn out. As for how much id charge would depend on what you need done, ect..

Kriston: Thanks bud, ill show you my "bling bling" ride when I got it all set up. [img]tongue.gif[/img]

Deyton: Haha, yeah… I thought about it one day and decided to strip it down to the metal for better heat dissipation as well as looking puurrrdy.

bing: I don’t know, I guess it depends on what you have as well as what you want to be done.

scarlemthug: Well.. you can always get an Auto Body shop to do it, although I got quoted $60 to sandblast my amp. Where is your buddy located? If he’s in the Mississauga / Brampton area I can do it for him. If the chips are small he can probably just get some touchup paint (hobby paint w/ brush) and just fill in the scratches.

JeepBeats, Blu: Thanks, will do [img]smile.gif[/img]

abnormal72: Thanks man, I have another amp but it’s a Rockford Fosgate bd1000.1 so I cant really make them match :(

just the heat sink on an amp, same size as yours.

refinished and painted, though i would prolly want to have two done.

Mike...you know you wanna gimme that amp!! [img]smile.gif[/img]

Here is an updated pic after 1hr on the polishing wheel, and after about another hour using "Mothers Mag & Aluminum Polish" this is what it looks like. (sorry about the big pic)

http://mikeweb.atnet.ca/tmp/mmats/IMG_0586.JPG

Whaaaat. bling bling, looks good man, hmmm i got a few extra amps you can do [img]tongue.gif[/img]

Kriston

Very nice job man! Well done, I would have loved to have done that to my Punch 40/60/200 I had.... :(

a lot of hard work that really paid off

looks good [img]graemlins/thumb.gif[/img]

That looks bloody good.

wow, that looks totaly awsome!!!1000kudos [img]graemlins/thumb.gif[/img] [img]graemlins/thumb.gif[/img]

thats really really wicked man...great job.

that is NUTS...

i ask agian, how much, exactly the same thing on very similar amp

Sent ya a PM

Edit: this was for bing

[ June 22, 2003, 10:36 AM: Message edited by: The Professor ]

i didnt get it...

unless you were talking to someone else.

This has given me ideas. Good work, man! Glad it makes you happy.

Looks awesome [img]graemlins/thumb.gif[/img] :D

Damn!!! That looks amazing [img]graemlins/thumb.gif[/img]

question do your transistors make contact with the heat sink
are they fully plastic encapsulated
or is there an insulator used
the reason im asking is that some manufacturers use the coating as an insulator
and you blasted the underside

Wouldn't that defeat the purpose of the "heat sink"??? [img]graemlins/freak.gif[/img] I have never come across transistors that used an insulator between it and the "heat sink"...Almost all amps will have heat sink grease under the transistors to aid in the transfer of heat.

Maybe this pic will help.


http://mikeweb.atnet.ca/tmp/amps/IMG_0246.JPG

Aiyah...

Hehe, everyone likes pretty pictures of amps. [img]tongue.gif[/img]

Yes but the fets (TO-3's) are metal encased, which is a heatsink in itself...thus the reason why they are considered superior. In all the equipment I work on at work, the TO-3's are pressed into the heat sink on the underside to aid in cooling, I would be willing to bet those are the same. [img]smile.gif[/img]

Oh and by the way, your amp looks spectacular, good job! :cool:

[ June 24, 2003, 10:36 AM: Message edited by: kilowatt ]

WOW! Amazing job, must have taken a while, but, maybe, if the black was in a pewter, or like a machiened finish, i just think it would bring it up into 2004 a little more, but good job none the less!

kilo if you look at the pick you will see a white ring around the to-3 casing and the power supply transistors have a tan colored insulator
usually all transistors are insulated
because the casing or tab have power to it
if they were allowed to make contact to the heatsink it would never turn on or if it did not for very long

Speaking of the power supply transistors..

Now I know people like Mmats amps and for sure they make a good amp but the minute I see a manufacturer using the hole in the transistor tab as a hold down I have to shudder.

Motorola says don't do that - the hole is there for handling only.

kilo if you look at the pick you will see a white ring around the to-3 casing and the power supply transistors have a tan colored insulator
usually all transistors are insulated
because the casing or tab have power to it
if they were allowed to make contact to the heatsink it would never turn on or if it did not for very long </font>[/QUOTE]Pinhead-The screws holding down the fets are screwed directly to the heatsink!! [img]graemlins/freak.gif[/img]

usually there is a plastic insert under the screw to isolate it
trust me almost 100% of all amps are made this way

http://www.germainesystems.co.uk/dow...es/capflow.pdf
heres a link to a diagram of how it works kilo
scroll down to page 11

I have 2 amps sitting in front of me, a PPI and an MTX, both have the transistors screwed directly to the heatsink with a dab of heatsink grease under them (also on your Matts amp under the copper piece). If I can find somewhere to host the pics I will post them.

some times the transistor is full plastic encased
some of them the hole is full plastic encased

these amps you dissassembled them to make sure the insulator dosn't run the full lenght of the amp

second last paragraph of this link

http://members.tripod.com/valveaudio/Membuatsendiri.htm

[ June 24, 2003, 08:09 PM: Message edited by: pinhead ]

And here is a post with pics of the transitors mounted directly to the circut board with a little heatsink grease.


http://www.canadiancaraudio.com/cgi/...=006245#000002