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8x sealed Maelstrom 18s build thread - Page 3

post #61 of 781
Quote:
Originally Posted by LTD02 View Post

hey notnyt, nice choice considering your very high spl system.

if you are looking for something creative for cabs, maybe take a look at the old m&k mx 5000 mk ii thx. those were only 12's.

http://www.dreamhomecinema.com/GEN/P...%20MX5000.html

it is a sealed design. one "in" one "out" to help reduce distortion from driver non linearities.

with maelstrom's, that would be cool. the thing that looks like a slot port on the bottom doesn't do anything.

Is it an isobarik design?
post #62 of 781
Quote:
Originally Posted by N8DOGG View Post

Right now I'm running 2 mal-x's in 5 cf boxes with an ep2500 bridged to each one. I had one ep2500 running both for a few days and it's not enough for anything below 25 hz at reference, the amp would clip. I would be running 1 per driver if possible. If you start to eq below 20hz and have 2 drivers on 1 ep4000, it's gonna run out of steam pretty quick. Thats just my experience anyways.

What are the particulars of your set-up? Is it different with one bridged amp per driver?
post #63 of 781
Thread Starter 
So I was able to cancel my EP4000 order. I'm currently ordering two Marathon MA-5050s.

10kw of power should do the job
post #64 of 781
Find a store with them in stock?
post #65 of 781
Thread Starter 
Quote:
Originally Posted by Scott Simonian View Post

Find a store with them in stock?

Yep, good price too. Only took all morning to hunt down a pair.
post #66 of 781
Online? C'mon. Spill the beans, man.

Heheh, unfortunately I cannot afford one after all the holiday spending but I know there are several on here looking for one.
post #67 of 781
Thread Starter 
Quote:
Originally Posted by Scott Simonian View Post

Online? C'mon. Spill the beans, man.

Heheh, unfortunately I cannot afford one after all the holiday spending but I know there are several on here looking for one.

http://www.sixstardj.com/mamamaprseam.html

I spoke to Juan there, and ordered two for $1500 shipped. They will work with you a bit on pricing, and apparently have like 50 of them in stock.

Many other places will be receiving stock in January.
post #68 of 781
Thread Starter 
I updated the first post with these graphs. This is the new modeling with 10kw of power from the MA5050s. This should provide some serious output




post #69 of 781
Oh snap! And they're right down in SoCal. Hmmm... I might be able to get decent shipping from these guys. Damn. Why'd I have to be so generous for Xmas?! I am teh broke.
post #70 of 781
Thread Starter 
Quote:
Originally Posted by Scott Simonian View Post

Oh snap! And they're right down in SoCal. Hmmm... I might be able to get decent shipping from these guys. Damn. Why'd I have to be so generous for Xmas?! I am teh broke.

They dropped the price down to 750 a piece for me, then told me $50 each for shipping, I got them to drop the shipping and ordered right then.
post #71 of 781
Sweet! I sure they keep stock of these for a while. Although I love the ep4k's, having less amps and power cables (and power switches to toggle) would be nice cause I'm looking to have a stack of them dang things.
post #72 of 781
Show Off! LOL.

Nah, seriously I am so jealous and I wouldn't think twice off doing something crazy like this if I could afford it. I hope the results as good as they look which they should be.

Are the power ratings RMS for the marathon amps and is that tested power.

Even the 4050 amp looks impressive.

And it has a switchable voltage which I could use here in the UK.

Very impressive.

cheers

Graham
post #73 of 781
Thread Starter 
Quote:
Originally Posted by Scott Simonian View Post

Sweet! I sure they keep stock of these for a while. Although I love the ep4k's, having less amps and power cables (and power switches to toggle) would be nice cause I'm looking to have a stack of them dang things.

Screw toggling power switches. I'm building some solid state relays to run off the 12v triggers from my AVR. I'll be posting pictures of all that as the build progresses. I have all of the parts ordered, I'm just waiting for them to be delivered now.
post #74 of 781
Thread Starter 
Quote:
Originally Posted by gperkins1973 View Post

Show Off! LOL.

Nah, seriously I am so jealous and I wouldn't think twice off doing something crazy like this if I could afford it. I hope the results as good as they look which they should be.

Are the power ratings RMS for the marathon amps and is that tested power.

Even the 4050 amp looks impressive.

And it has a switchable voltage which I could use here in the UK.

Very impressive.

cheers

Graham

They say:

Output Power 8 (ohms): 2 x 1200W
Output Power 4 (ohms): 2 x 1900W
Output Power 2 (ohms): 2 x 2500W
Output Power BRIDGE 8 (ohms): 3600W
Output Power BRIDGE 4 (ohms): 5000W
Frequency Response @ Half Power:15Hz - 25KHz (+0/-1dB)
THD+Noise at 1KHz Full Power: <0.03%

http://www.marathonpro.com/mamamaprosea3.html

Others on the forum have sung their praise, as they're basically a copy of the QSC RMX5050
post #75 of 781
Do they have noisy fans! LOL

Very interesting power ratings. How stable are they running 2 ohms compared to the EP4000 amps
post #76 of 781
Quote:
Originally Posted by notnyt View Post

Screw toggling power switches. I'm building some solid state relays to run off the 12v triggers from my AVR. I'll be posting pictures of all that as the build progresses. I have all of the parts ordered, I'm just waiting for them to be delivered now.

I'm with ya on that but my awesome AVR lacks 12v triggers for the main zone. For whatever reason, on this model, they kept those exclusively for the 2nd and 3rd zones. Brilliant! So I may use a power sequencer of some kind.
post #77 of 781
Thread Starter 
Quote:
Originally Posted by Scott Simonian View Post

I'm with ya on that but my awesome AVR lacks 12v triggers for the main zone. For whatever reason, on this model, they kept those exclusively for the 2nd and 3rd zones. Brilliant! So I may use a power sequencer of some kind.

You can always just have a relay trigger off the AC feed to your amp.
post #78 of 781
Thread Starter 
Quote:
Originally Posted by gperkins1973 View Post

Do they have noisy fans! LOL

Very interesting power ratings. How stable are they running 2 ohms compared to the EP4000 amps

I'll let you know when I get them. Supposedly they're quiet and stable. I believe bossobass was running them for a while. This is what he's said about them:

Quote:
Originally Posted by bossobass View Post

The Marathon MA5050 (the only Marathon amp I've used) is a 1/2 price copy of the QSC RMX5050. I've used RMX amps for 6 or so years and they've never been shut down except for switching out new subs and during power outages. They're pretty much bullet proof and roll off 2nd order at 5Hz.

Among the Marathon's protection circuits is an in line 20A fuse, which I have cooked a few times under extreme use. I replace the fuse and they march onward.

For the $, they're great subwoofer amps... period.

They require a 20A dedicated outlet per, they're HEAVY and they have dual blue LED high beam on lights. The fans are relatively quiet compared to Crown, QSC and the American Audio amps I've used.


http://www.avsforum.com/avs-vb/showt...3#post19212673
post #79 of 781
Quote:
Originally Posted by notnyt View Post

You can always just have a relay trigger off the AC feed to your amp.

Hmmm. Very well.

Quote:
Originally Posted by notnyt View Post

I'll let you know when I get them. Supposedly they're quiet and stable. I believe bossobass was running them for a while.

Yeah and if possible, find out what kind of fan(s) are installed in case they are loud. I've got a half dozen of these fans I bought to use with a stack of Europower amps but it would be nice to know that they would work in this amp too.
post #80 of 781
I find the EP4000 gets hot pretty quick chuckiing low frequency music though it at 2 ohms stereo, would be interesting to see how the marathon amps compare when running the same load.
post #81 of 781
Thread Starter 
Quote:
Originally Posted by gperkins1973 View Post

I find the EP4000 gets hot pretty quick chuckiing low frequency music though it at 2 ohms stereo, would be interesting to see how the marathon amps compare when running the same load.

This is the reason I went with the marathon amps. I'd need four EP4000s, they'd run hot, and it still wouldn't match two of the MA5050s.
post #82 of 781
Quote:
Originally Posted by gperkins1973 View Post

I find the EP4000 gets hot pretty quick chuckiing low frequency music though it at 2 ohms stereo, would be interesting to see how the marathon amps compare when running the same load.

Hmmm... I run dual RLp18d4's off a 2500 in 4ohm bridged with a quiet fan mod and I don't get that much heat. I guess I don't push it that hard which is probably a really good thing for me in more than one way. Actually, casual lurkers may want to disregard my last sentence. With dual LLT's in a very small room, I shouldn't be pushing the amp hard at all. Going sealed... that's gonna put some hurtin' on my amps. Especially with a Bassis inline.
post #83 of 781
My FI Q18's are dual 1 ohm drivers. I did a dual sealed first time around which is why I bought 2 dual 1 ohms to wire 4 ohms.

I want dual 2 ohm drivers really but am waiting for the new blueprint (FI) drivers to come out which is within the next couple off weeks.
post #84 of 781
Quote:
Originally Posted by notnyt View Post

This is the reason I went with the marathon amps. I'd need four EP4000s, they'd run hot, and it still wouldn't match two of the MA5050s.

Good decision. They look like killer amps especially if you can power them on a 220v line.
post #85 of 781
That was my line off thinking especially as I live in the UK and we run a much higher voltage.
post #86 of 781
Quote:
Originally Posted by Swampfox View Post

What are the particulars of your set-up? Is it different with one bridged amp per driver?

I'm running 4 IXL-18's in an IB and 4 mal-x's (2 are getting new boxes) in sealed. 4 ep2500's and a RMX 5050 and a dcx2496 in a 14x20 (open to the whole basement though) . There is a difference running 1 per driver, you can EQ without clipping at 20hz(although you still can clip it pretty easy when running above reference) and it's an easier load for the amps since your not using up every bit of power. I can run 10db's above reference when bridged and not reference when shared. Them mal-x's will eat up a ton of juice when Eq in a sealed box.

Good choice on the marathon 5050's though. I'd like to see a shoot out between 2 x 5050's and 4 x ep4000's though.
post #87 of 781
Quote:
Originally Posted by N8DOGG View Post

I'm running 4 IXL-18's in an IB and 4 mal-x's (2 are getting new boxes) in sealed. 4 ep2500's and a RMX 5050 and a dcx2496 in a 14x20 (open to the whole basement though) . There is a difference running 1 per driver, you can EQ without clipping at 20hz(although you still can clip it pretty easy when running above reference) and it's an easier load for the amps since your not using up every bit of power. I can run 10db's above reference when bridged and not reference when shared. Them mal-x's will eat up a ton of juice when Eq in a sealed box.

Good choice on the marathon 5050's though. I'd like to see a shoot out between 2 x 5050's and 4 x ep4000's though.

I am all about WAY too much power on tap, headroom. Two EP4000's for four IB3's. Four AP30001Ds for four IB3's. Two KX850.4's for four Adire Audio Extremis 6.4's and they want so much more, I can clip the amps and the Extremis just get annoyd at lack of power. A KX650.4 bridged 8 ohms for two CSS FR125Ss. An SX500.2 parrallel 2 ohm on four Vifa XT25TG30 1" Ring Radiator tweets, and when i play hard that 500.2 gets hott... had to dial the gains back a bit

I have to admit, since you were able to cancell your orders, I am glad you got those big ass beasts... it just made this build log even funner! Lets see some sawdust.
post #88 of 781
Thread Starter 
Got my solid state relays. Going to start building my relay boxes. I'm just waiting for some cable for the trigger section.

post #89 of 781
Thread Starter 
Monoprice also dropped off some cables for me today..



Now I just need some amps.

In the mean time, I'm waiting for another monoprice delivery of some cable I'll be using for the trigger on my relay boxes.

I've built them as far as I can without it. They're mostly done at this point.











post #90 of 781
Thread Starter 
And the enclosures mostly modeled.

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