Powering Infinity Prelude MTS

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.

The original spikes screw in. Sp the first owner must have glued after-market spikes on them. If you're handy, recommend you try to fix the volume knob yourself. Also, when you do the RABOS measurements, make sure the tiny pots are all in the fully clockwise position. I love these speakers with 300B SET amps.

Thanks, I will check the bases and see if I can source the screw on spikes. Speaking of SET amp friendly speakers, have you compared these by any chance to Avantgarde or similar horn speakers? Any thoughts?

I own Tannoy 215 DMT II speakers rated sensitivity 101dB. Dual concentric 15" drivers with compression horn tweeters, i.e., one of the greatest speaker designs ever made. I love both the Tannoy and the Prelude MTS, but they sound totally different.