I havent heard the BA with any other deck than my own.

The loading was 5k on the wad - even lower. The step up is set to 20 db.

True - but you know what I mean. If someone has a speaker with true tight bass and if they listen to a certain type of music then and only then will they hear the difference.

If its there to be had then I gotta have it

There are some schematics on the BA web page.