Group Buy: drivers for a 4ohm sealed 410

[derridiandrift]

Originally Posted by Alexander Eddy

Well the most sensible thing to do would use four 8 ohm drivers wired in parallel for a 2 ohm load. This might not help solid state guys, but it will work for the 2 ohm tap on the Ampegs. You'd have your choice of the entire eminence lineup too

There are no 8 ohm B810 drivers. Only 32 ohms. We're trying to convince Eminence to build a 16 ohm version. Read the whole thread. We're talking about individual drivers, not cabs.

[Alexander Eddy]

Originally Posted by derridiandrift

There are no 8 ohm B810 drivers. Only 32 ohms. We're trying to convince Eminence to build a 16 ohm version. Read the whole thread. We're talking about individual drivers, not cabs.

I did read the entire thread thanks.

I was suggesting that in lieu of using a 16 ohm speakers in parallel for 4 ohms; you could use four, 8 ohm speakers in parallel to get a 2 ohm load to your tube head.

Should your amp have two, 4 ohm taps, you could wire your individual speakers into pairs which would give you two 4 ohm connections

With that in mind nearly the entire eminence range will provide you with an impedance match and you could find a speaker similar in T/S specs to the B810 (which you clearly aren't going to get 100 of)

The alpha 10 is one such example (although it has a smaller xmax).

[3rdcurve]

Hoping to bring this thread back to life. I am looking to build a 410 vertical stack with these speakers. I built an 810 using the legend b810 drivers and love the tone, but it is big, heavy, and overkill anytime I have PA support. I have a wood working buddy that does top notch work, would there be any interest in custom built 210 cabs using these drivers? My design is slightly bigger and heavier than the ampeg 210av, but would sound that way too.

[1n3]

Eminence used to make a Beta 10B, which was 16 ohms. Don't know how long that's been discontinued. Wonder if there could be some NOS Beta 10Bs still around.

[beans-on-toast]

Originally Posted by derridiandrift

There are no 8 ohm B810 drivers. Only 32 ohms. We're trying to convince Eminence to build a 16 ohm version.

Have you considered contacting a local speaker re-coning place and asking them if they can convert the coils from 32 to 16 ohms while maintaining the wattage?

Your coils would have to be rewound. This might involve buying a B810 re-cone kit. Perhaps Eminence will sell you a special re-cone kit with the 16 ohm coil installed.

[Lemon]

How many are we ?
I would be interested in at least 4 =)

[Lemon]

A 4 ohm version would do also insnt it ?
maybe the would be more likely willing to do that, since it would be more versatile and sellable.
the only thing is that it would most likely change the response slightly.

Its really almost impossible to find drivers for closed cabs these days.

[rythmicillusion]

+1, would be interested in 4....unless I find another solution first...

[AgressivePassiv]

Count me in for 4. How many people do we have so far?

[DukeLeJeune]

Originally Posted by bgavin

If you run the four 32-ohm drivers in parallel, you get an 8 ohm load, and none of the loss associated with series-parallel wiring.

What loss is associated with series-parallel wiring?

[derridiandrift]

Zombie thread... since this was first started, the idea has only garnered the interest of about a half a dozen people. Eminence won't even entertain the conversation if we can't come up with something like 100 drivers. Even then, it's no guarantee.

No surprise though, with all of the fantastic drivers and ready made cabs out there, I'm among a very small minority of people who would even consider dragging a sealed 410 around

[Vanni]

Hey guys, I just wrote on the Ampeg Facebook fan page asking for a 4 ohm version of the 410HE. Feel free to chime in to have your say!
http://www.facebook.com/AmpegUSA/pos..._comment_reply

[dmac1961]

I would definitely take 4. I'm in the same boat. I have a blackline SVT and a flatback 810, but the cab is just too much to tote for smaller gigs. I would love a sealed 4 ohm 4x10.

[dmac1961]

I just looked at the Eminence website. To do the OEM thing, it's a minimum of 50 pieces plus a resale tax ID and a business license. I have the latter two, all we need is 13 people that want these!

[Dr Onion]

I would be more than happy to jump in on this. The Fliptop seems to be the way to go, but I just need the right speakers.

[coreyfyfe]

Forgot about this thread.

For those still interested in getting that old school CTS sound in a 4x10, based upon all the testing Kringle77 has been doing with his squareback 8x10 (long thread) you might want to look into the Weber Bass 10FL. They're apparently the closest in sound, stock. Closer than the B810 or the fliptops neo 10. And they're available at 8, 16, or 32 ohms.

[1n3]

Another option for a 4-ohm 410 is the Faital 10FE200, which is available in 4 ohms. It's cheaper than the Weber, and the specs are OK for a sealed cab (the 4-ohm version less so than the 8). The Weber specs... don't exist. It's remarkable that a manufacturer can sell bass speakers in 2012 without publishing specs.

[astack]

The Faital is a bit boomy, per modeling, in a reasonable sized box. I've heard that the rest of the range sounds very good though. As large a box as possible and loads of heavy damping material would make is workable I think. A 6x10 sized 4x10, for example, maybe?

[1n3]

Originally Posted by astack

The Faital is a bit boomy, per modeling, in a reasonable sized box.

It probably varies. The 8 ohm model has a Qes of 0.74, vs. 0.52 for the 4 ohm model. In a 1cf sealed box, WinISD shows almost no hump for the 4 ohm; the 8 shows about a 2dB hump at 120hz. That's not necessarily a bad thing, and I wouldn't call that boomy.

The OP wanted drivers for a 4 ohm sealed 410. Here's an available & affordable driver that will do that, and the specs are in the ballpark. That's about all I can say on the subject. Kringle77 played with these, but I'd guess he had the 8 ohm version.

[astack]

Oh wow, didn't realize that difference in specs between the two. Doh. Hmm, and maybe I'm thinking of a different driver, TBH. IIRC an f3 a bit below the SVT's 80 Hz, but being half the drivers, it's probably a good thing to make up some of that lost sensitivity in the lows. And yes, I'm pretty sure Kringle had the 8 ohms.

Point is, don't second guess 1n3. Lesson learned.