Merlin VSM/MMe with Berning ZH-270

I also use the Berning ZH 270 with VSM speakers (MX version). I found that the Berning benefited from the use of a preamplifier. My source is the AA Capitole. The insertion of a preamplifier (Joule or First Sound) in the chain significantly improved the sound. I use the bam between the source and the preamplifier. I was much happier with the Berning (which I really like) after I used it with a preamplifier.

You may have bad batteries in the BAM. Does it sound any different if the BAM is plugged in to AC?
Low feedback sounds best anyway.

I have a horrible feeling it is the SBAM, going to try tonight, I'm interested in trying it with a pre-amp, but those mentioned are not available in the UK, I was wondering about C-J ET3 SE?.

I also have mme's with Berning ZH 270 and second the recommendation of a pre-amp. I have a modest Herron vtsp1 preamp and the system is excellent. I do find on mine, best to keep volume control on Berning not too high (10 o'clock maybe) and crank the pre for volume. Do you still have distortion with BAM out of the system?

Couple other tips, I found that the mme's like to be "dead" level. Also ZH 270 responds well to upgraded power cord. I like JPS AC+. I found noticeably improved dynamics with power cord upgrade.

Yes, it was the bam on battery only and not fully charged.
I intend to try a pre-amp as I want to make the most of the Berning / Merlins and a tape loop would be nice as I have CDP and Turntable sources and only a single input BAM.
Planning an extended listening session this weekend
Best David