Looking for a non-powered sub

Out of curiosity, SCM, is there a reason that you specifically want a non-powered sub? Unless you have a spare power amp that you want to use, there are a number of advantages to having a powered sub: the internal amp is optimized for that particular sub; there is a built-in crossover (saving the expense and complication of having a separate unit); and cost.

If you need to keep your costs moderate, I'd suggest you take a look at the subs made by Outlaw Audio. Their subs were designed for them by Hsu, and they offer excellent value. For more info, go to this link: http://www.outlawaudio.com/products/subwoofers.html

I do have an amp that I want to use. It`s a Behringer EP1500.
I`m led to believe that to blend in a planar well, some outboard devices might do an overall better job.
Problem is, I don`t know what all I`ll need,and keeping the cost on the lower side of it all too.

I have a pair of Audio Artistry Dvorak subs. Each sub is a dipole sub, with one 10" woofer firing on the front and one firing on the back. They are a great match for planar speakers. I am driving them with a Hsu Research power amp with adjustable crossover modules.
I will consider seling them.

Take a look at the non-powered New Original Subwoofer by VMPS. It was designed to mate with the Quad ESL, and actually could be used as a stand for that speaker. Last I checked, VMPS subs could be purchased either pre-assembled or as a kit.

How low in frequency do your Maggies go? If you need the subwoofer to go any higher than 80 Hz, you will probably get better results with two subwoofers, one underneath each Maggie. This is especially important if you are you using your system for music rather than HT. You might be able to buy two VMPS subs for not much above $800 if you don't mind buying used.

If you want a true DIY subwoofer, i.e. you buy the raw driver(s) and design and build the cabinet yourself, you can chat with other such eccentrics (including myself) at www.diyaudio.com.

The large majority of subwoofers on the market are active (internally powered). I prefer passive (non-powered) subs. The internal amps included in active subs are generally of inferior quality compared to stand-alone amps. Also, the interior of a hot, vibrating subwoofer cabinet seems like the worst possible place to put an amplifier. My pre-pro does the crossover job, so I don't need a separate component for that. If you do need a separate crossover unit, they are available at reasonable cost from VMPS and many other sources -- or build your own, with a little help from other DIY'ers.

Gallant, my room is only 14' x 18' with 9' ceilings. Dipole subs might be pushing it don`t you think?

Java..No interest in wood working, but a put-together kit is interesting.
I`m leaning to the VMPS especially if they can be had in kit form.
In the VMPS line, which sub would you recommend in my room?
I want tuneful/musical bass, not what I hear going by me on the road if you know what I mean.

Which crossover would you use to limit the 1.6`s from seeing too much bass a Paradigm X-20, NHT X-2 or other... ?
Thanks,
Steve