Axiom Home Page Forums General Discussion Home Theater Master T

Yeah i suck at it too and age hasnt enhanced anything. I still have to left hands when it comes to any kind of sport though i used to be quite adept at hand to glass combat many years ago.

My EP 500 is alive now, it opened up and I am amazed at the output. The gut buster will go on the adjacent wall and I will most likely adjust the level and phase to make the two sync.

I think that the additional sub will not overload the space at all, but it will certainly round out grazing space bass.

My big issue at the moment is I am having a problem with my amp shutting down due to over temperature at loud volume levels which it never did. This is new. It was always happening on the right speaker (right channels of the amp closing down). I switched the speakers side to side and now the left channel shuts down, but what is interesting is the right channel went out a couple of minutes later and I have been monitoring the termperatures of the heats sinks and the over temp occurs at 150 degrees. One speaker definitely makes the amp run hotter than the other. When I had the initial issues, the right channel was always running about 20 degrees warmer... I switched the speakers from side to side and when I went into over temp; the now left channel (the speaker from the right which ran 20 hotter) is running about 5 to 8 degrees hotter so it tripped first, but I was interested by the fact that the new temperature differential is only 5 to 10 degrees vs. a solid 20 or so. Not sure if this is due to the crossovers in the Speakers causing this or if the amp has an issue going on. This is all new, never had issues with loud playing over heating the amp. And this only occurs with a specific CD I have which is full of very dynamic mid and low range material. Never an issue with vinyl, no matter how loud I play it and how much dynamic range the material is.

Any one have any ideas?

Mojo, hows the switch? I know its new and not opened up as of yet, but initial thoughts? I'll have mine mid week

Slim, let's compare notes on the gut punch mode after you've received your sub.

CDs have a 20 to 25 dB greater dynamic range than vinyl. You may be reaching the limits of your amp. One channel could be slightly different than the other. Another possibility is the impedance of the speaker. Ask Bryston what the T's impedance and phase is up to and above 20 Khz. It could be that the CD along with the program material you are listening to is full of ultrasonic content that is taxing the amp particularly if the T's impedance dips below 4 Ohms and its phase deviates extensively from nil.

It's also possible you've cooked one of the Ts and I am sure no one ever thought that would be possible but by your own admission, you've been pushing them to the spec'd envelope.

Update; I caused the amp to shut down with vinyl tonight.

It seems that the amp is running warmer than it used to in the past. If the T's had a change in the crossover specs due to what ever; would that not cause things to go south right off?

I am wondering if this is not an amp problem... but it could well be a T issue, not sure how to approach this.

contrary to what that reviewer posted, I totally disagree. The Model T's, not Middle T's as in the review, are amazing speakers. Solid, beautiful to look at and they have unbelievable dynamic power and range.

My issue at the moment is still undetermined in origin of cause of the problem. As in everything electronic, it can be complex or very simple. I've run many tests over the weekend and at the very least, I have a lot of data points. I just don't know what is breaking down

Not sure how you are driving them but bass takes a lot of horse power and playing them full range can be taxing on a reciever even at 8 ohms never mind 4 ohms . Sorry i thought you had the middle t. Many people buy a usb fan setup to put under or on the reciever to move some air, heat kills electronics and fast.

I am bi amping the speakers at 4 ohms. 400 watts per section, so there is no under powering clipping going on. But there is a new and sudden over temperature situation going on.

i didnt suggest under powering at least i didnt intend to but if your playing loud into 4 ohm loads your drawing current and that makes heat, just add some cooling its not like your committing a sin by doing that. try a small house fan to move some extra air.

Agreed, a fan would be great, but what disturbs me is that in much warmer temperatures vs. winter conditions, I never had to use fans to cool the amp and it never went into heat shut down. Something else has occurred which is what I am trying to get to the bottom of. It's either a change in the amp or a change in the speaker crossovers or a change in a speaker driver.