Axiom Home Page Forums General Discussion The Water Cooler New EP800

Jason, welcome. Change the impedance setting on the 806 back to the higher number. Setting it to 4 ohms in no way optimizes it for operating with speakers having that rating, as some imagine. This is a precaution to help prevent overheating, required by UL(Underwriters Laboratories). It does this by reducing the voltage that the power supply section of the receiver can output. Following Ohm's Law, when the voltage is reduced so is the current and power. So, although the chance of overheating is reduced this is done at the expense of reducing the maximum performance capability. Tests indicate that the maximum power capacity is roughly cut in half. The lower impedance setting should never be used.

It was pretty warm. Do you really think I should push it? I mean, I agree 100% but dropping the max output seems like a good way to protect the amp from a fiery death.

The point wasn't how far you should "push it", although if the unit got really too hot the protective circuits would shut it down. Limiting the power capability by limiting the voltage output leads to a possible situation where clipping would occur earlier and might cause speaker damage, a more significant problem than simply running hot.

Sound&Vision often tests the effect of the lower impedance setting during its reviews. The 806 hasn't been tested, but note for example the result with the 875 .

Ahh!!! Thank you for the sage advice! I am switching it back at this moment.

Looks teeny tiny to me. How did you fit the 800 in there? Honey, I think I shrunk the 800."

Thats one killer setup you have. I need a second job so I can run with the monster sub club.

Welcome to the Axiom club Jason, and your sub-memberships in the M80 and EP800 clubs. Your really going to enjoy that setup. Was the damage to your speakers mechanical or to the cabinets?
Mel N.

Another welcome, Jason. Sorry about the damage on the speakers but I know Axiom will look after you, as you know their service is exemplary.

Onkyo's run very hot. It is completely normal. Driving 4-ohm speakers might make it just a tad bit hotter, but your M80's are not the reason that it's hot to begin with. See numerous AVS threads. It's not a problem unless you have it in an enclosed cabinet with no air circulation.

As JohnK says, it is usually recommended to just leave the impediance switches in the '6+ ohm' setting unless you start to experience thermal shutdowns. Though with the 876 I just returned, I could tell any difference in terms of sound volume or quality when running my M80's in the 4 or 6+ ohm setting.

As a test, just leave it on and don't play anything - it'll likely remain just as hot as it does when you're using it.

Enjoy the fabulous new setup!

Welcome to the forum baloo,

That is a very impressive setup you got there . You are in a very elite club . Congratulations! IMO you can never have too much subwoofer as long as its calibrated properly. I bet the EP800 really rocks that room!

Enjoy!

PS - Get your neighbour to join the forum

HA!!!