I've been reading this thread with personal interest for one reason. I have 2 pair of NLAs and I absolutely cannot stand the way they sound. I thought, a while back, that it was because I had not yet recapped them. I have since recapped them and my opinion is the same. My wife even makes the same comment I have about them. They are harsh and piercing to the ear. It makes little difference, IMO, which position the switch is placed. The sound is not sibilant or Ssssy. It is uncomfortably screechy. The bass is muted and not anywhere near boomy. I am very disappointed. I recently picked up and rehabbed a pair of L36s and I like the sound from them much better although they are a bit on the boomy side. My JBL LX600s are even better than the NLAs and the LXs are far from a great speaker, though fairly pleasing to listen to.
The recap was done because I thought the harshness was a product of bad caps. I even added a bypass cap to the equation thinking it would make a difference. I can hear little no difference between the before and after. I guess I'm one of the few that just don't really like the NLAs. I'm not one to try a redesign like Zilch is doing and since I am really quite pleased with my DCM collection and my JBLs I guess the Advents are probably out the door. Any opinions about my observations and feelings about NLAs would be appreciated.
Zilch, your attention to detail is incredible and, though I am one of the masses that don't mind a speaker with a bit of a bass boost and a receiver with a loudness button, I must say I appreciate your opinions and science work.