What are some 2x10, 4 ohm cabs...

There is only one that I know of. fEARless F210. Other than that, you can not expect any 210 using full range drivers to handle that kind of power.

If you are looking to pair this 210 with your 410, you should look at an 8 Ohm 210 in the same product line as your 410.

 

The DNA DNS 210 is rated at 700 watts. Good luck finding one. I don't know of any other mass-produced 210 rated higher. Most 210s max out at 400 or 500 watts. You can use your amp with just the 210 if you're careful about keeping the volume within the limits of the cab. I run my MB Fusion 800 (500 watts at 8 ohms) into my Bergantino AE210 (8-ohm, 400 watts) with no ill effects.

CL400 has a good suggestion if your 410 is 4 ohms. If you get an 8-ohm 210 to pair with it, all six drivers will feel the same current and produce the same power, and you'll be running at 2.7 ohms, well within the capability of your amp. At that load, I'd guess your amp will produce about 1,000 watts - plenty for most gigs. I also recommend to get a 210 by the same manufacturer and in the same model line, if possible.

 

This. It gets you 6 equally stressed drivers when you take it to the limit.

The little extra oomf can be calculated. It's not very much, less than 4dB of extra headroom iirc.

 

Why not just 3 8-ohm 210s? You'll have lots of options then.

 

I think he already owns the 410?

 

I use Greenboy Audio's Fearless 210, which uses the 3010LF high excursion drivers from Eminence. The cab weighs about 47lbs and can produce the volume of a good 410. Tone is wonderful - everything you'd expect of a Fearless cab. This cab is 4ohms, and I safely pump 900 watts into it with a Puma 900 amp.

The Fender Aerodyne Jazz bass in this photo is for sale, BTW.

I haven't made gig recordings yet with the F210. But my Fearless 110 sounds the same aside from one difference: the F210 has two drivers, which gives it an "enveloping" feel to the sound - a very good thing! Here is a gig recording with the F110 and a fretless acoustic bass:

 

Does Epifani make an 8 Ohm 210 in the same model line? If so that would probably be your best add, if not a second matching cab.

 

I have two BFM Omni 210s w/Delta Lite 2510s. Terrific drivers & very musical, as is the whole DL II line-up. Each box is 4 ohms & 500 RMS. Tremendous "vertical" 410. Here's an excellent Omni thread.
http://www.talkbass.com/forum/f15/odd-cab-shootout-bfm-omni-10-lds-15-6-1-a-725946/ Run them with my 400+, 300 Pro, V6, iAmp 800, or Mo'Bass.

The new Eminence 3010s can take 400-450 each. Kappa Pro will do 500. See a 400 RMS Ciare 10NDH-3, Faitals @ 500 , 600 , & 700 (10FH500, 10FH520, & 10HP1020), a 400 RMS Beyma (10G40), 400 & 450 RMS 18Sounds (10M600 & 10MB600) & a 400 RMS B&C (10PLB76).

 

I would not think a 410 of any other brand would pair well with your epifani. Your ears will be the final judge.

 

An identical box is always the best case scenario. After that, I suppose, a box from the same manufacturer in the same format (another Epifani 410).

Once you move further away (different maker, different format), the possibility for poor tone/sound increases to a greater level. To avoid this, would strongly suggest that you try before you buy.

 

You want to get a cab loaded with the same speakers that are in the 410, and you want the impedance of the 210 to be twice what the impedance of the 410 is. Otherwise when you use both the 210 and 410 will get the same power, and you don't want that.

 

http://www.acmebass.com/pdf/b2.pdf

Not exactly sure if this does it for you, but there are very few 2X10s that even come close. The best I own and have ever played is my Cerwin Vega Dan Armstrong Hot Cab, and that is only 300W at 4 Ohm.

Better just using a lightweight 4X10, something like this: http://www.philjonespuresound.com/products/?id=21

Other then that, not sure life will be that easy...

 

The Acme B2 comes in 8Ω and 4Ω.

 

IMHO the best match to your existing cab, is a second identical one.

 

Mark Vanderkley makes a 4 ohm 2x10, his cabs are exquisite!