Can you tell me why I didn't like the Reference 3a MM's?


So I recently asked about a new amp on the Amplifier forum.  I got a lot of good advice and ended up with a Pass XA25.  I really like this amp and the sound.  I have been told by Reno Hi Fi, Pass Labs and B&W, all of whom I contacted, that the XA25 is under-powered for my B&W 705S2 speakers.  But it sounds very good.  However a little flat when the volume is low.

So I am looking for some more efficient speakers.  I tried a used set of Reference 3a deCapo MM's, but they did not have the clarity of the B&W's and sounded a bit muddy at times.

I am looking at Omega Super Alnico HO's.  But I am wondering if the full range driver sound is what I didn't like.  

Am I wrong in thinking more efficient speakers will sound somewhat better at a lower volume?  Can you possibly tell my why I didn't like the MM's?  Something about their design or build?

Any thoughts on the Super Alnico HO's?  I don't want to move down the speaker sound chain.

Thanks much!  Any other speaker suggestions welcome!  But not horns.  I am not a Klipsch fan.
128x128jgoldrick

Showing 2 responses by aricaudio

@jgoldrick the Unlimited can use multiple signal tubes all all different Mu, so having too much gain can easily be remedied. What tubes are you using in the signal slots (ex: 12AU7, 12AT7, 12AY7, 12AT7, 5751, etc.?
@jgoldrick Thanks, I'm glad you're enjoying the preamp! I was just looking to help a bit regarding the "high gain" you were experiencing. The 12AX7 has an overall gain factor of 100 and the 5751 is 70, so both of these are considered high-Mu/high gain tubes. If you wanted to set the gears a bit lower and have more available range in the volume control, you can roll in a 12AT7 (gain= 60), 12AY7 (gain=45) or 12AU7 (gain=20). Best regards, Aric