looking for a more efficient speaker.....

From what I can see about the Alon's, they're excellent. Information about your amplification is critical.

See Atkinson's comments on impedance.

https://www.stereophile.com/content/acarian-al243n-iv-loudspeaker-measurements

If you are hearing the Alons strain, you are probably under powering them.

I you like the Alon sound and want something easier to drive check out the Alon Lotus SE MKII should be pretty affordable used if you can find a pair. Higher efficiency and impedance plus they use an Alnico midrange driver and an outboard crossover. I used them, and loved them, with a variety of tube amps. We moved to a smaller apartment and I had to let them go. Here's an old review on them:

http://www.sonoris.co.kr/review/reviews/tas/lotussemk2.htm

sorry about that, 

mccormack dna 500

oppo 203

herron vtsp 1a

acoustic zen wow II for the amp to pre and pre to cd player everything else is audio ar interconnects