I have no understanding why people say the RTi12 or RTi9 is a nasty speaker for music and is too bright and brittle for 2 channel music. I put the RTi12 up against My original SDA1C's.....they don't sound the same of course..but there not bright or brittle as compared to the SDA's in fact since the SDA's still have the SL2000....the 12's come across as LESS bright.
These are not bad speakers by any stretch, they have no problem at all putting out bass and there sound stage is nothing to say it's junk. It's very wide and sounds fine.
It's NOT SDA stuff butt..there is no speaker that can do that...and may be an acquired taste.
The only problem i can see..is if you power them with junk, and feed them with a not so good media.
I use a Onkyo M 504 power amp, a Jolida tube cd player and a Adcom pre....I don't find that these speakers are bad at all.
They may be a tad mid rangegy if there is such a word....but for sure are not overly bright or brittle.....at least if you use the right Equipment on them.