Modding the MTX 1501d Tutorial

[MikeyB 5,000+ posts]

Alright I see this question asked a lot around here on how to mod the MTX 1501D. Its a very simple task and most people can do it. I just picked up a used one and have decided to mod it and snap a few pictures of the process for those of you that don't know how.

The two things that are done in the mod include releasing the compression circuit and removing the resistor Q240 from the board of the amp.

They don't do it from the factory because the chip you remove is the part of the protection circuitry that shuts the amp down if it see's a load below 2 ohms (ie dead short) so when modded you have to be careful not to touch the speaker leads together while the amp is on, or you will short it out. And yes the mod will allow up to 18.5 dc volts and down as low as you feel comfortable on impedance... I wouldn't suggest any lower than .5 for daily.

 

q 240 is located in the south west quadrant of the amp... you have to be careful not to remove d240 that is right beside it. Also, the compression circuit is a little white button next to the rca end of the amp. It needs to be pushed in the "out" position.

Here is where the resistor is located \/

Here it is after it was removed \/

I just grabbed a soldering gun and a pair of small needle nose pliers and I heated up the solder on the resistor for a little bit, then crab it with the pliers and just wiggled it off nice and easy.

BTW, doing this obviously voids the amplifiers warranty.

Click to read more...

 

[MikeyB 5,000+ posts]

Here is the switch for the compression circuit \/

Now you have a modded MTX 1501D capable of pushing some serious power //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[_DjScrew_ 5,000+ posts]

good job sir .. i loved my 1501d. i wish it wouldn't have gotten stolen //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[ANTHRAX_4_SALE 10+ year member]

So now its modded, do you know right off the top of your head how many watts will it be sending at 1 ohm?

 

[_DjScrew_ 5,000+ posts]

So now its modded, do you know right off the top of your head how many watts will it be sending at 1 ohm?

around 2kw rms

 

[MikeyB 5,000+ posts]

At 1 ohm it will push around ~1800 wrms, it will be powering two 12inch alpine type r's wired at 1 ohm.

 

[ANTHRAX_4_SALE 10+ year member]

around 2kw rms

Thanks

 

[MikeyB 5,000+ posts]

Wondering if this could get stickied for all those guys looking to see how this is done:crap:

 

[ngsm13 5,000+ posts]

Hmm... good quote... that guy must know what he's talking about or something... //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

nG

 

[MikeyB 5,000+ posts]

Hmm... good quote... that guy must know what he's talking about or something... //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
nG

Maybe, not too sure though, I've heard some things about him. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[nissanrider06 10+ year member]

good thread, i say sticky the b!tch

 

[Buckshot 10+ year member]

What are you trying to make this kids system loud or somthing? WTF man. Hehe, nice tutorial Mike.

 

[MikeyB 5,000+ posts]

What are you trying to make this kids system loud or somthing? WTF man. Hehe, nice tutorial Mike.

Yeah just a lil bit, its probably gonna wang bro. I bet it will be a lot louder than my 18, the 18 has the cone area but where talking two drivers getting 900wrms and its not gonna cancel out like my sub did. I cant wait to get it installed and listen:up2somet: //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Boomin_tahoe 5,000+ posts]

I bought an old MTX 81000D from some jerk sometime ago and supposily it's modded but not entirely sure that it is. The "chip" is the Q240, I believe. I took it apart one day and looks to be there so I wonder if I bought a "lemon" amp. Sadly enough, the amp isn't hooked up yet.

 

[Ricky616 10+ year member]

Here is the switch for the compression circuit \/
Now you have a modded MTX 1501D capable of pushing some serious power //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

i like that amp it reminds me of mine //content.invisioncic.com/y282845/emoticons/crying.gif.ec0ebefe590df0251476573bc49e46d8.gif i shouldn't have sold it //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif