Legend B810

[vilan7]

Hi
A question regarding my first cabinet build attempt:
I have Trace Elliot AH150-7 head and 2x10 Carvin cabinet with red Fostex horn, but its too loud for a house and too heavy for a quick jam.
I was thinking to build a 1x10 cab with B810 and 2x8 passive radiators. B810 is 32 ohms so I presume it will be much more quiet and easier to carry around. I would use the same head, and if I build just a cab it will be for the same price as small practice amp, but should sound much better.
What do you think?

P.S. Another option for small cab would be ACOUSTINATOR NH2008, its only 8", and supposedly have a nice woody sound, and I could use it as a monitor for my bass (Fender Jazz Deluxe) or guitar.

Thank you

[DukeLeJeune]

The B810's Qts is so high that it really is only suitable for a sealed cabinet unless you like a really fat bottom end. I suggest the CA2010 as an alternative better suited for a vented box, with comparable top-end extension. You mentioned weight; you save 3.1 pounds with the CA2010, and save another couple of pounds because you can get away with a smaller cabinet size. I've read of people using the CA2010 as a guitar speaker with supposedly good results, though its efficiency is modest. You might try 1.0 cubic feet with a 3" diameter port, 8" long. This will give you a 1 dB bump at 100 Hz and -3 dB at 65 Hz.

If you know that the B810 is what you want, I still recommend sealed rather than vented unless you really want an exaggerated low end.

[vilan7]

Thanks for a reply!
I pick B810 because of its 32 ohms , I need something quiet. CA2010 is 8 ohms, and if I go that way my first choice would be Legend BP102. But you are right, I could just make B810 in sealed cab, it would be even more portable and cheaper ( no passive radiators). I looked at Eminence page and they dont have cab design for it, but I will use BassBox for it.

[billfitzmaurice]

Originally Posted by vilan7

Thanks for a reply!
I pick B810 because of its 32 ohms , I need something quiet. .

Turn your amp down.

[vilan7]

ha ha ha good one, this beast is soooo loud, I could only dial till 1, because I have one year old son in the house. Plus I need something that one man can carry, this Carvin cab weight a ton !! Its 2x10 Beta 10a ( I think ) and its 4 ohm .

[JimmyM]

if you can only dial 1, then dial 1. the 32 ohm impedance idea is wacky at best.

[will33]

Originally Posted by vilan7

Thanks for a reply!
I pick B810 because of its 32 ohms , I need something quiet. CA2010 is 8 ohms, and if I go that way my first choice would be Legend BP102. But you are right, I could just make B810 in sealed cab, it would be even more portable and cheaper ( no passive radiators). I looked at Eminence page and they dont have cab design for it, but I will use BassBox for it.

The B810 is an SVT replacement speaker. You build a sealed box 1/8 the size of the fridge, that's all. Or you could pick up a little 10-20 watt bedroom practice amp to use at home. That's something you could pick up used for less than the cost of 1 speaker.

[vilan7]

I just got an email from Anthony Lucas (Customer Service at Eminence)regarding the same topic:

"Assuming the load is safe for your amplifier, then yes, that approach would lower the output. You could certainly use the B810 in a single driver cabinet.

I am not sure why they have not put the designs on our website yet, but I have attached a few that we recommend."


Here are 4 single drive designs if someone wants to see them:
http://rapidshare.com/files/42772272...2010_10_28.zip

Thanks Anthony !!!!!!

[bgavin]

Originally Posted by will33

The B810 is an SVT replacement speaker. You build a sealed box 1/8 the size of the fridge, that's all.

It sure looks like it.
B810 has an EBP=77, so it can swing both ways.

In a sealed 1.75 cubic foot box (Qtc=0.99), B810 shows the classic 100 Hz hump and drops below the 0dB line at 80 Hz. F3 is 63 Hz or so.
B810 is just the ticket for those wanting a 2nd harmonic cab with no bottom.
It's not suitable for vented box use, due to required size.
All 8 wired in parallel is a 4-ohm load, at least 101.7 SPL at 1w/1m.