Axiom Home Page Forums General Discussion Technical Questions EP350v2 versus EP350v3 specs

Here is an older pic behind the HT seating area. It is kind of an illusion, but there is about 16ft behind the couch to the door/windows. The surrounds look like they are mounted on the back wall, in reality they are about 12 ft from the wall hanging from the ceiling.

Right now, one of the 350's is to the right of that couch. I can get one to the back wall next to the doors, but it will be difficult placing the other sub to the left side of the back wall unless I get creative.

I did have the 600 standing up back in that corner when the 350s were about 8ft apart on the screen wall.

I wonder if Jakeman has experience this issue with the 600 sucking the output from the 600 when using other subs?

Randy, thanks a ton for posting your experience. As my signature shows... I have a 600 on order that I am planning on pairing with an existing Earthquake sub. Your experience has me worried that perhaps I should cancel the order and go with something with less input impedance.

I will admit not being nearly technical enough to understand all of the points and counterpoints raised her, but it's enough to worry me that I'm not going to get the desired results when connecting two subs to my Denon 3808.

Am I overly worried about this or should I be dialing back to the 500? Any input is very much appreciated from all those commenting here who seem to be quite knowledgeable on this subject.

Myrison,

You have the problem backwards. The higher the input impedance the better it is for your receiver.

You may just want to inform Axiom of your application and see what they say.

Thanks Mojo... yes, I wrote that backwards, but I think I still have a valid question (could be wrong though, of course) about the feasibility of pairing the EP600 with another sub. I'll ring Axiom about it as you suggest next week and see what they say. Any other thoughts appreciated from those who have tried pairing the EP600 with another sub.

Myrison,

You can certainly pair the 600 up with another sub. The issue is whether or not the other sub would have the desired SPL level that you seek.

To illustrate, I can pair my Sony active sub to the 600 and my Sony "works". However, its loudness is severly attenuated because the Denon can't produce a voltage signal of sufficient magnitude to drive it due to the 600's low input impedance.

Thanks Mojo. To get the bass I desire from my Earthquake sub now, I already have the dial maxed out on the sub and the Denon gain at about +8.5. At that level, it is good at high volume levels, but at low volumes, it lacks the effect I'd hoped for.

I'm guessing there's not going to be a definitive way to know whether the 600 is going to be acceptable combined with my existing sub until the 600 is in my room, but from the results seen here, it looks like I'll have less output from it than I do now.

It seems like my best chance at getting similar output will be to keep the volume on the EQ sub maxed out as it is now, with the Denon gain still at +8 or higher, and the volume on the Axiom sub near minimum.

Maybe the 600 will provide so much bass that the attenuation effect on the EQ sub might not matter... I'm thinking I'll just have to get it here to know for sure.

How big is your room? Is it closed off from the rest of the house?

Very moderately sized by most standards, about 12x20x9, and yes, it's a dedicated media room and has a door to close it off.

Nope. I used an Arcam avp700 processor which is also has a high output signal. In fact at one time I had 3 600s daisy chained without any issue. I've always thought the source of many of your problems was that old Denon receiver you use.

Too bad you are having so many problems dialling in those subs. I've always recommended a minimum of dual subs in any HT because the benefits of smoother response and greater headroom. However, that assumes you can calibrate and dial them in properly with each other and the mains. One of your measurements looked pretty good with all subs driven.

What's up with your SMS? Are you using the latest firmware.