Any Thoughts On These?

knighttodd - Thanks for the clarification and the tip on Amazon. I may have missed it, what SS amp do you run with the 60s?

Parasound A21+ 500wpc into 4 ohm speakers. Good base with this amp. I have two of them. For various reasons.

High-amp, just want to clarify a few things about the ML Motion 60XTi and speakers with AMT tweeters, in general.

With regard to room placement issues related to speakers with AMT tweeters, a few reviewers have noted they sound best when there is plenty of empty space behind the sweet spot or listening position. This was, indeed, my personal experience with the ML Motion 60XTi. If the sweet spot in your listening room is, for example, a couch with a wall directly behind it, I think this would quickly lead to listener fatigue. On the other hand, if your sweet spot has... say, 6’ or more empty space behind it, then I think that might be OK. I would factor this in to scheduled auditions of speakers like this.

With regard to other room placement issues (e.g. space between speakers and wall behind them; space between left & right channel; etc.), I would also factor that into scheduled auditions, as well. Basically, you want to replicate your listening environment as much as possible, including the equipment you’ll be using.

Is 12" from the back wall 12" from wall to back of speaker cabinet or wall to baffle, which I think is the more important measure. With that particular room placement constraint, you might want to concentrate on front or bottom ported speaker designs. One notable exception to this might be Monitor Audio. If I remember correctly, their Silver 500 and 300 are rear ported designs that do relatively well with that sort of room placement issue.

With regard to the power question, generally speaking, speakers of less than 8 ohm nominal load design, even efficient or sensitive ones, tend to perform best with amplifiers that can feed them adequate current. Watts of power and quality of current supply are different factors. The ML Motion 60XTi are, if I recall correctly, a 6 ohm nominal design and relatively sensitive. This will not be as much of a factor with them as with 4 ohm nominal load design speakers. If you are also in the market for amplification to go with these ML or, for that matter, any other speakers, you should also factor this into your auditions and research. For example: I recently auditioned a pair of Aerial Acoustics 6T speakers (4 ohm nominal load design) that just dropped my jaw! Fantastic speakers! I was ready to buy them on the spot after auditioning them with a 75 watts rated big MAC tube stack. However, after spending a little time listening to them with a 100 watts rated solid state MAC integrated (what I have) it only took a minute or two to hear that these gems really did best with a better power supply. They still sounded fantastic with the 100 watts rated MAC SS but you didn’t have to listen hard to tell they did best with a better power supply. Proper matching of the equipment chain is key.

The Motion 60 and 60xti sound [notably] better with a higher quality higher current amplifiers. Well designed AMT based speakers can sound truly amazing only with (select) heavyweight tube amplifiers. Bright sounding lower grade amplifiers need not apply here, they reveal what you send them.  

oldaudiophile - excellent advice. Thank you. I will have lots of space behind the listening area but I understand that the 60s need to be 24" off the back wall (to the front baffle) and 24" off the sidewall which will be tough to accomplish in my space.

decooney - thanks. Just an FYI:  I have secured a Krell k300i integrated for an amplifier.