Axiom Home Page Forums General Discussion Home Theater Ian and Tom Video interview re: A1400-8 & EP400.

I know Axiom is great about its return policy but I'm planning to borrow a couple of 400s and the amp by picking them up in Dwight. I wouldn't put the company through the cost of shipping and administration unnecessarily. I heard the ported version 400 at the Axiom show last summer and it sounded very good.

ihifi(John) yes we need more John's in this thread.

I was trying to communicate the idea in a less technical manner when I said "Regarding output, one way to look at it is that the EP600 is twice as loud etc...." but Mojo is right about "perception" of loudness as being different that an SPL doubling.

That Harman article is a terrific article on the benefits of multiple subwoofers.

A pair of 400s as an alternative to a 600 will be a neat comparison. Stacking the 400s gives you the output of the 600 because of coupling. You have the flexibility of separating them for smoother in room response but then have only half the output with less extension than the 600. One other interesting attribute though is the flexibility to set the 400s as stereo subs with monitors or the smaller Axiom speakers.

I'm really looking forward to listening to them hopefully next week. I'm heading up to Dwight this weekend to spend a couple of days on the lake.

Jakeman,

Make sure to take alot of pics and post a lengthy review...I wish I could be there with you to put the dual EP400's through their paces.

I was also very curious about the new EP350 v3, dual EP350v3's will give you 600 watts of power, and a sub that reaches down to 18hz...not bad at all! especially for less than $1400.

Jakeman,

How is THD and group delay affected when you stack subs?

Robb,

Do you know what you're giving up by going dual 350s vs. a 600? Notice that the 350 doesn't have an SPL deviation spec or a graph.

I was thinking about pming alan to get a graph up for the EP350v3. Maybe he'll see this post.

The reason I am so curious about the dual 350's is that you can get 2 of them for just a little more than an EP500. And you can place your dual subs on opposite walls obtaining a smoother bass response in the room. I think the trade off is worth it...I might be persuaded to get two EP350v3's instead of an EP500.

You read my mind!

Mojo one of the main benifits of multiple subs is more headroom and less strain on the individual subs. Accordingly at any level of SPL you should see an improvement in distortion and group delay. You create extra headroom by co-locating the subs due to coupling. The major drawback is the lack of room smoothing when you have subs located throughout the room. The trick is to have the subs close enough for mutual reinforcement and far enough for room smoothing. Easier said than done.

Lots of output for the $$s in the 350v3 however it doesn't have the DSP circuit. And who knows how the 350v3 compares with THD or group delay. It would be great if Axiom would post CEA-2010 SPL stats for comparison.

yeah...um, what he said! (I am still new to all the graphing )

You hit the nail right on the head. I wouldn't rush out and buy a 350 until I knew how it was differentiated with the 400 at least. John, it's all up to you to tell us. No pressure but with great knowledge comes great responsibility .