Eminence Alpha 10a or Beta 10a in Sealed 2x10 Cab

[PawleeP]

The Alpha 10A is great in a small sealed cab, but works poorly vented. Can't say about blending sealed and ported cabs. My preference would be to go with fully sealed or fully ported. The delta 10a's ported in 1 cf each would probably work quite well. with the 610hlf. However, the Alpha's (sealed) may work just fine.

do you think i should shrink the internals a little, if so about how much?
The cab being around 1.1 per side right now <eminence specs sealed vol for alpha10 calls for .3-.4cf /geeze that's small>, has a (partial) divider brace, but not completely separate cavities, would completely sealing each side be better?
the cab vent(s) in mine (the swr) workingman & goliath III, look about like the ones in this pic (top cab)
Lookin to put this thing to bed, show comin up.. definite greatly appreciate all this knowledge..

 

[Memphis Joe]

The ideal size depends on the tone you are looking for: HiFi (flat), rich with good articulation (mildly peaked) or with a lot of bloom or pillowy (strongly peaked. It also depends on amplification type: ss or tubes. If you are more interested in max volume and tight, articulate bass the Delta can be a good choice ported (around 1 cf per driver). The Alpha in 1 cf sealed yields a rich but articulate tone (moderately peaked). The Delta in 1 cf, tuned between 50 & 57 Hz yields a tighter, articulate tone (hifi, light EBS alignment), though a little bass boost can take it into a rich tone (but with a bit less power handling).

Do you have an idea what size the port should be for the Delta to tune @ 50-57 HZ?

 

[GreyBeard]

For the Alpha Eminence recommends a 1-1.5 cu ft. sealed cab. It should work. I would line the back and sides with acoustical foam and maybe caulk the joints to make sure that there are no air leaks.

Speaker Detail | Eminence Speaker

 

[markjazzbassist]

i have since purchased the amp (many years ago) and realized it doesn't have enough power. so i'm not doing this anymore. thread can probably be closed.

 

[AstroSonic]

Sorry for the late replies. For some reason, I missed the additional activity.

Just to tie up some lose ends:

do you think i should shrink the internals a little, if so about how much?
The cab being around 1.1 per side right now <eminence specs sealed vol for alpha10 calls for .3-.4cf /geeze that's small>, has a (partial) divider brace, but not completely separate cavities, would completely sealing each side be better?
the cab vent(s) in mine (the swr) workingman & goliath III, look about like the ones in this pic (top cab)
Lookin to put this thing to bed, show comin up.. definite greatly appreciate all this knowledge..

The Alpha 10a will work well in a sealed 1-1.5 cf box. Larger boxes may have excursion problems, while smaller boxes will be strongly peaked in the 100-140 Hz range and have less well defined notes. I can see no reason to divide the cab into 2 chambers, especially if there is already adequate bracing.

Do you have an idea what size the port should be for the Delta to tune @ 50-57 HZ?

The Delta 10a in 1 cf can be tuned to 54 Hz with a 3 inch diameter port, 4 1/4 inches in length.

 

[Memphis Joe]

Sorry for the late replies. For some reason, I missed the additional activity.

Just to tie up some lose ends:



The Alpha 10a will work well in a sealed 1-1.5 cf box. Larger boxes may have excursion problems, while smaller boxes will be strongly peaked in the 100-140 Hz range and have less well defined notes. I can see no reason to divide the cab into 2 chambers, especially if there is already adequate bracing.



The Delta 10a in 1 cf can be tuned to 54 Hz with a 3 inch diameter port, 4 1/4 inches in length.

Just to be clear: 2 ea.Delta 10a in 2 cf can be tuned to 54 Hz with 2 ea. 3 inch diameter port, 4 1/4 inches in length?

 

[beate_r]

yes.

 

[Memphis Joe]

yes.

are you astro sonic?

 

[Memphis Joe]

Sorry for the late replies. For some reason, I missed the additional activity.

Just to tie up some lose ends:



The Alpha 10a will work well in a sealed 1-1.5 cf box. Larger boxes may have excursion problems, while smaller boxes will be strongly peaked in the 100-140 Hz range and have less well defined notes. I can see no reason to divide the cab into 2 chambers, especially if there is already adequate bracing.



The Delta 10a in 1 cf can be tuned to 54 Hz with a 3 inch diameter port, 4 1/4 inches in length.

Thank you for the information. It is most helpful.

 

[AstroSonic]

Just to be clear: 2 ea.Delta 10a in 2 cf can be tuned to 54 Hz with 2 ea. 3 inch diameter port, 4 1/4 inches in length?

Yes, and it would be a nice cab.

 

[Memphis Joe]

Yes, and it would be a nice cab.

Very cool . Thank you so much for your help

 

[JimmyM]

are you astro sonic?

Two people can't know the answer?

 

[BadExample]

are you astro sonic?

Sometimes.

 

[PawleeP]

beta..
Program Power Handling 500 Watts 34oz mag 51Hz - 3.8kHz Sensitivity (1W/1m) 97dB
VC 2" / 50.8mm Max. Crossover Frequency 4kHz
Rec. Enclosure Volume(Sealed) .3-.5cu. ft./8.5-14.2 Liters
What is an decent 150-175w equivalent of a Delta 10, Can't seem to find any. Have a small sealed wedge that doubles as a coffeehouse gig bass cab and has a horn and x-over i put in it from a 410 ampeg.
Do they still make them?