Best MTM kit/plan for 70% HT, 30% music - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 21 Old 12-31-07, 08:18 PM
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Re: Best MTM kit/plan for 70% HT, 30% music

The WR125s is a small driver but you have to remember they have 6mm one way xmax, most mid drivers have closer to 3mm, so going by overall displacment one WR125s has almost the capability of a 6.5" driver with 3mm xmax. I am testing a HT set up right now with my new Fw4.1's as surrounds and center(FW8.4.1's for LR) useing the FR125, and I can tell you output from these little drivers is no problem, the sytem seems to be able to keep up with the 18" LMS5400 subwoofer I am testing them with. The MTM with two WR125s' should have plenty of output.

Nathan Funk
Funk Audio
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post #12 of 21 Old 01-01-08, 12:26 PM Thread Starter
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Re: Best MTM kit/plan for 70% HT, 30% music

Should I have any trouble driving a 4ohm load with a Marantz SR6200 AV receiver? They're supposed to have pretty beefy amp sections, and I've never had even a wimper pushing huge Klipsch monitors to reference level. Specifically, I have the Nat P in mind...


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post #13 of 21 Old 01-01-08, 01:30 PM
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Re: Best MTM kit/plan for 70% HT, 30% music

I have no personal experience but a marantz would be fine. Ideally if you are building something as high end as the nat p you would eventually upgrade to an amp like the behringer a500.
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post #14 of 21 Old 01-01-08, 09:59 PM
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Re: Best MTM kit/plan for 70% HT, 30% music

People have given these PE Showcase speakers pretty good reviews - especially for the cost. I'm personally very fond of transmission line speakers.


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post #15 of 21 Old 01-02-08, 09:27 AM
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Re: Best MTM kit/plan for 70% HT, 30% music

If your marantz is not rated for 4 ohms, then do not hook up 4 ohm speakers to it.

I thought the same thing and everyone told me "if it can handle a 6 ohm load, it should handle 4 ohm magnepans, it's an easy flat load to drive". Well, it did drive them for two years, until one day it said "no more" and blew the output transistors on two channels. It was only a $300 fix, but since then, I just use it as a preamp.

So don't make the same mistake I did.
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post #16 of 21 Old 01-02-08, 12:05 PM
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Re: Best MTM kit/plan for 70% HT, 30% music

I have a Harman Kardon AVR 330 and it ran the Nat P's just fine. I intend to run my RS 3-way mains on a separate amp eventually but the HK does just fine for now. I don't have any experience with Marantz.

As far as the speakers go, here's my two cents:

I've built GR-Research speakers and they sound great but they are more expensive for what you get.

I haven't heard Zaph designs but based on what I've read they are very well designed and sound great.

I have built designs by Dennis Murphy, Evil Twin and John Marsh over at the HT Guide Forums. Great designs that sound great. At this point in time, I am completely satisfied with my speakers.

I have also built designs by Curt Campbell featured on the Parts Express website and they sounded great.

I hope this helps.

Last edited by kano32; 01-02-08 at 12:12 PM.
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post #17 of 21 Old 01-02-08, 12:59 PM Thread Starter
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Re: Best MTM kit/plan for 70% HT, 30% music

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Anthony wrote: View Post
If your marantz is not rated for 4 ohms, then do not hook up 4 ohm speakers to it.

I thought the same thing and everyone told me "if it can handle a 6 ohm load, it should handle 4 ohm magnepans, it's an easy flat load to drive". Well, it did drive them for two years, until one day it said "no more" and blew the output transistors on two channels. It was only a $300 fix, but since then, I just use it as a preamp.

So don't make the same mistake I did.
Anthony,

What kind of A/V equipment did you have that blew? How old was it? Obviously, this is a big concern and I don't want to ruin my receiver. A lot of people have adopted the Nat P and seem to be running them on a wide range of consumer and pro amps. Are there others out there who have experience in this area?

Thanks for all of the advice!

Mark
Springfield, IL

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post #18 of 21 Old 01-02-08, 01:45 PM
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Re: Best MTM kit/plan for 70% HT, 30% music

Marantz SR-18 receiver (was their flagship about 7 years ago).

Also blew a Kenwood KM-Z1 amplifier with the same speakers. That accident was through ignorance (didn't know the Kenwood's minimum was 6 Ohms). Thought the Marantz would fix it. That incident was deliberate as I knew the Marantz was not rated for 4 Ohms, but I had plenty of "experts" telling me that I would be fine, Marantz amps were overbuilt, Magnapans were easy 4 Ohm loads because they were flat, etc. All those people didn't have to pay the repair bill or sit without a receiver for two weeks.

I have since bought an Outlaw power amp and now use the Marantz as a pre-only. No problems at all. It barely gets hot.

so there's a chance you'd be okay, but be forewarned: those amps are rated that way for a reason.
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post #19 of 21 Old 01-03-08, 11:46 PM
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Re: Best MTM kit/plan for 70% HT, 30% music

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mazersteven wrote: View Post
That is the first time I have heard of those issues with the Thor's. Something I will have to look into.

I live in Palm Bay and work in Melbourne at Rockwell Collins. One of the engineers there was so unhappy with the Thor xo's that he took his own measurements and redesigned the xo's himself. I've heard them several times at his home and can say that they are very nice now. They actually sound very similar to my big MTMWW towers using all Dayton RS drivers.
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post #20 of 21 Old 01-09-08, 09:13 AM Thread Starter
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Re: Best MTM kit/plan for 70% HT, 30% music

As you might guess from my last couple of posts, I decided on the Natalie P for my L/R channels. My Parts Express package arrived yesterday and the Madisound crossover components should be here by Friday. Thanks for everyone's advice, and look for a build thread for the new Nat Ps in the near future!

Mark
Springfield, IL

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