Powering Infinity Prelude MTS

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!!!

Agree these are very beautiful speakers. I drive mine with 12 watt Wavelength Cardinal 300B monoblocks, and haven't had voice-coil failure. I don't have them toed-in.

For owners that have had problems, it's a shame that Harman Kardon doesn't provide better parts support.

I have done very little experimentation thus far with these speakers as I haven't had the chance to use them much. I originally set them up almost face forward and about three feet from the back wall. I later tried toeing them in significantly and pushing them back closer to the wall, which resulted in a smaller but more precise and focused sound-stage. I have also only applied RABOS only once, before I adjusted their positioning, so I need to do that again at some point. The volume control of one of the woofers has come off, which I will have to get fixed - yes, the QC issues are a bit tiresome. I'll probably spend more time experimenting with them one of these weekends.

Agree that these are very good speakers in a number of ways, especially for use with lower power amps. They are a bargain used - a very neutral speaker with innovative design features for relatively little money on the used market.

Did you know that the Infinity RABOS website has a calculator that computes the settings when you input the meter readings?

The RABOS means that the distance from the back wall isn't critical. I recommend no toe-in. The listening position should make a close triangle with the distance between the towers, e.g., if towers are 7' feet apart, then your ears should be circa 8' back from the center point between the towers.

I doubt that the volume knob was a QC issue. Are you the first owner?

Hi Jburidan, I didn't know that, thanks for the heads up. Will try positioning them as advised. No, I'm not the first owner, I bought these last year (or was it the year before?) for a second set up used but in good condition. I was looking for a reasonably efficient speaker with an active sub and a small footprint, and these checked all the right boxes on paper. I have enjoyed their relatively uncoloured and lively presentation, and certainly feel I can as yet get more out of them with a bit of work.

The volume control was working fine until last month when I gently turned it to lower the sub's volume and it fell back into the sub enclosure. The sub spikes have also come off as they were glued to the base, and aren't the screw on variety. So I do feel that Infinity packed in the technology but scrimped on build quality relative to its high price tag when new... even though the couple of problems I've had (other than the mid range driver) are niggles, such an expensive speaker should function flawlessly for years. Glad that it sounds good though.