Powering Infinity Prelude MTS

Yea, I feel your pain.
Haven't had that problem since going with Krell amplification. And we play LOUD!
Had 2 midranges that had started buzzing when I was powering them with my Phase Linear gear. No problems now. Maybe just a coincidence?

You can still get the Woofer & Tweeter through Harman. Already got a backup of both just in case. Paid around $54 for each one, through Harman, about a month ago.

As far as the Midrange Driver. Good luck. Finding those are TUFF.
Have two I purchased last year for the same reason.

It definitely shouldn't be your amps. You have great amps there.
Some were over-driving them with lesser amps.

Have you ever tried the hook-up from your preamp?

Thanks for your 2 cents...

Yep, definitely the voice coil.
What I meant by amplification was that people were pushing the Preludes too hard with lesser amps and ending up damaging the voice coils. Mostly folks with receivers.
You wouldn't have that issue with your amps.
I didn't mean that it was your amp that was the problem.

I was lucky enough to catch Harman at the beginning of last year when they happened to have gotten some midrange drivers in.
I was on a list to have them contact me if they had gotten some in stock.

Harman said they (MTS' Midrange Drivers) won't be available through them anymore.
I still keep contacting them just in case.

Once in a while you can find someone selling them on ebay.

I do have mine toed in. They're focused about 3' behind my listening position.
I've had the best luck with them 4' from the rear wall and 3' from the side walls.
I'm 10' from the speakers and they're spaced about 10' apart.

How are your speakers set up from your listening position? Distance, width, toed?
Have you experimented much with different placement?

They're sweet speakers!!!

Hey again Viajero5000,

I did a little experimenting with hooking up the Preludes via the separate component guide in the owner's manual. The bass modules driven with the preamp using the internal 850w internal amplifier.

I found that the bass amp in the Infinity's didn't have the control over the woofers as well as the Krell amp does.
Was listening to an SACD of Boston and had the woofers reaching their limits and started to distort. Granted that's at quite loud listening levels. At that same level I had no such issues with the KSA-250.

You would think the 850w BASH Amp inside those subs would outperform the 250w of Krell amplification. Not so!

Will be going back to hooking up the Infinity's directly from the amp.

Jburidan,

Would that engineer know if you're running speaker level input to the Preludes whether or not you're by-passing the subs amp?
I've noticed when I run line level input that the front of the sub gets warm where the sub's amps are. When I hook it up with speaker level inputs that that area wasn't getting warm.
I too could be mistaken... I just assumed that the sub's amps were being bypassed.
I haven't read anything in any of my manuals indicating that's the case. I think some furhter searching may be in order for me to verify.

Hey guys,
Just a follow up after finding out about line vs speaker level input.

Got and email response from Harman...

They confirmed what ya'll said.
Makes no difference whether feeding the Preludes line or speaker level. They both go through the sub's amps.

Thought that was nice of Harman. I actually got a personal response from one of the designers of the Prelude MTS'!

Thanks again for ya'lls input.

Hey Winslowst

Been a while for me to have been on a-gon myself. Had to get over the new a-gon, me hates change!

As far as my MTS' ever sounding bright... I've never had that problem. And that's with me driving them with my Krell KSA-250.

Maybe our room has enough fabric furniture, drapes that cover a whole wall, carpet and a huge amount of space behind my speakers to tame any brightness that may be there. I don't know!
They've always sounded absolutely awesome! Not just with the Krell either, with my Sim Audio, Legacy-Audio, Musical Fidelity KW, Sunfire & even my old Phase Linear gear.

Also never had any problem with the subs to seamlessly integrate with the towers. No time coherence issues.

The only thing I was thinking of doing once was to separate the towers from the subs but, never was able to get the stands for the towers.
To be perfectly honest, I'm not sure that would be a good idea anyway seeings how the designer built them to be mated together.

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