help with speaker problem

I have a problem...i notice it only on piano music, it sounds like the tweater of both my speakers is distorting, simmilar in sound to when a speaker clips, only not nearly as loud, but audible from my listening also seems to be frequency only occures, or occures to a much great level within a certain frequency range judging by the piece of music i was listening to when i really noticed it around the C above middle C on a piano give or take a bit.

when i first noticed the problem in my left speaker returned the speaker and they replaced the tweeter with a new one, but the problem persists and is noticable in both speakers...

my system is

totem arros
nad c350
kimber 8pr cable
eichmann express 4 interconnect
dennon dcd 3520 cd player

any idea what it could be...I wouldn't think three tweeters could all exhibit the same problem unless its a design flaw with that model of speaker (unlikely)... i thought mabey the piano notes happened to fall right around the crossover point of the speakers and that somehow caused the distortion...
im biwiring with kimber 8pr, could low frequency sound somehow leak into the tweater...
you guys are really me out!!, i dont want to just get the tweater replaced again cause i dont think it'll fix the problem, and i dont think that totem makes such poor quality part that three tweaters would all exhibit the same problem, and i doubt id be able to get my money back from where i bought them, as they're about 8 months old
it definately the tweeters though, ive tried everything, including hooking them up to an entirely different system, so i know its nothing in my system causeing it
Is this a two or three way speaker? I'm not familiar with Totem. If I recall correctly, C above middle C is 1024 Hz which is in the midrange. Not many tweeters will go down to around 1 KHz.
Don't be quick to blame the speaker...I had the exact same problem in noticing that some piano frequencies sounded harsh. It turned out to be a precursor to a failing input board in my amplifier. That being said, the piano is probably the most difficult of instruments for a system to reproduce - especially with digital which IMO is horrible to a piano. Also, don't overlook the fact that our hearing gets worse as we age. It could be that those particular frequencies will always sound slightly harsh to you. Take the CD to another system and see if you hear the same problem.
the cd's are fine on another system
my hearing i believe is only 24 years old, and dont listen at loud volume levels...75db average

ive tried the speakers hooked up to a completely different system... and the problem its definately the speakers...
Could it be an odd room node? Maybe something in your listening room got moved and is amplifying this frequency. I sometimes experience this same phenomena on certain recordings and it seems more apparant with different gear in my system.
its emanating from the speaker itself...but it was suggested to me that mabey if the spikes on the speaker plinth arnt tightened enough or the binding posts, they could start a resonance in the tweeter and that could be the problem...does this make sense??....
Have you made sure the mounting screws are tight on both the tweeters and woofers? Are the Arro's fillable? Some Totem speakers can be filled with lead shot. If they are capable of being filled, use #9 lead shot; you can get it at the local gun shop. There could be a wire or some acoustic fill touching the back of the woofer cone. The Arros are a great little speaker. The only shortcoming is they only play so loud; expected from such a small woofer.

Good luck,
When you say the distortion is emanating from the speaker are you listening with your ear up to the tweeter or are you detecting this from your normal listening position? How loud is it? Did Totem test the speakers for the distortion you're experiencing? What did they say?

It's possible it could be a problem with loose plinth spikes or binding posts. It seems unlikely, but double check both these.

The other system you tried the Arros in, was it at a different location or was it in the room you normally listen in? Would you say it has a similar tonal balance to yours or is it dramatically different in sound?
the other system is in a completely different house...and very different...bryston 7b amps, sonic frontiers pre amp. arcam alpha 9 cd player

the sound is loud enough that i can notice it from my listening position 9 feet away

when the problem occured the first time I brought the speaker to the dealer i bought them from and listened there, the dealer suggested the problem might be the plinth or binding posts, but in the end decided the best thing to do was to replace the tweeter. The dealer replaced the the speakers were never actually shipped to Totem at all...I did contact totem about the problem totem said the best solution would be to have the dealer replace the tweeter

which leaves me back at square one...speakers not working properly, and the "fix" also not effective

if a dealer sells a product that malfunctions or works in a sub-par fashion and is unable to repair or correct the problem should they not offer a refund? or would the time period of ownership (8 months) be too long to ask for money back?
Despite you're young, you've probably nailed the problem.
IMHO, It's a clear fault of a filter and/or crossover in Arros.
You may even want to audition different Arros at dealer with the same CD to narrow your problem to your particular pari of speakers or...
Another way is to run your speakers through electronic crossover temporarily disconnecting the built-in. Please note you should set an electronic crossover at the same crossover point as the speakers are initially designed.
If the same clipping occurs, you should vary the crossover point upto when the clipping stops I guess towards upper freequency bandwidth point from initial set.
After getting results of experiment, I'd contact Vince and tell him the problem. He may probably come up with "MarkII" version thereafter for product recall...
Or simply you can cut this experiment hassle and kick it back to dealer either for replacement, different speaker or complete money back...
Yes, very strange indeed. Did you try listening to your speakers while they were at your dealer when he did the tweeter swap? A good test would be to compare them to a set of Arros he has there. Maybe you could bring them home a demo pair and compare them to yours in your system. Obviously it's something further than the tweeter, unless he replaced it with another defective tweeter. But it seems like it could be crossover or internal wiring related. Maybe something is loose. It could even be the midrange if the crossover slopes are gradual enough.
Try flute and soprano sax to hear if they also generate the anomaly. If so, you're hearing distortion caused most likely by the impurity of one or more legs in your signal chain. When I had the same problem it finally disappeared when I switched preamps - from Forte to Threshold.
Get hold of a test CD with a slow frequency sweep that covers the crossover point and see if you can hear the problem. If you can set you CD player to just repeat the offending frequency band you might be able to isolate exactly where the distortion is coming from.
It may be the tweeter screaming its head off at the low end of its range. As with a woofer, the lower the frequency, the farther the dome must travel. The point just above crossover is where the tweeter is working hardest. I have heard the sound you describe, usually on piano or female vocals, especially on notes that are held for a long time. I usually backed the volume off a bit for these recordings until I bought more abuse tolerant speakers. The funny thing is that it didn't usually occur at what sounded to me like loud volumes. The music that caused was not generally head banger stuff, but seemed to have a lot of content at crossover frequency. I loike the suggestions of going to listen to other pairs, even just the in store demos, using a disc that you know causes it. Maybe the crossovers are defective, or maybe this is a limitation of this particular speaker.
Maybe the problem is the recording. Have you tried playing this recording on other systems? Have your tried playing this recording on the demo system at the dealer? The tweeters in the Arro's have a lot of detail and they could be highlighting a flaw in the recording.

I owned a pair of B&W N805sig's for a while. They were wonderful speakers but play a bad recording on them....

You know the old saying "Shit is - shit out...."

Hope this helps,
This is an update...after talking to a fellow arro owner with the same problem, and to Vince at Totem, the problem was diagnosed as a resonance resulting from vibration induced by the metal to plastic contact of the woofer and tweeter the arro the drivers are so close together that the plates overlap slightly....thus the problem is only on the arro model it doesn't affect any other totem also seems to be exacerbated with certain amp combinations...the NAD being one of has to do with the discharge frequency of the amp...dont know what that means...the distortion occures between 425 and 650hz...the solution is very simple, a very thin "gasket" is placed behind the woofer plate to physically separate the contact...mine will be getting this 'fix' very soon..ill report on the success...the fellow owner i was talking to had complete success with it so my hopes are high...
so fellow arro owners or prospective arro owners be aware of this potential problem...however dont let it stop you from listening to the arros...the arros are first rate speakers in every regard, and i must say the customer support is excellent, Vince personally attended to me.