Seas FA22RCZ full range project

[Kradkate]

Karsten, the unmodified SEAS was in the Breeze and my modified SEAS was in a multichamber reflex box i am currently working on. On HBs website you can see some pictures.

Thanks, this info is helping

Regards
Karsten

 

[joern]

... please could you tell us a few words of the result (sorry..I´m not the specialist for reading diagrams...)

Hi Karten

very short:

both graphs, the black (Gradient AX8) and the red (Seas FA) are nearly parallel in all grafs. This means: both drivers should give nearly the exact performance in that enclosure.

Slight differences in impedance - who cares ?
or max SPL: here the Seas is "better" - probl. higher x-max ?

Don't care about the "high" towards deeper frequencies - it's a simulation, that excludes the effects of the small baffle-width.
The measurement (follow links) provide a perfekt fit.

 

[Melon Head]

Does anyone want to comment about EnABL

 

[planet10]

Does anyone want to comment about EnABL

Not directly not having seen this driver, been i'd be surprised if this driver couldn't be made substantially better (Joachim is leading the way). I'd install phase plugs as well (whizzer cone drvers seem to get the most benefit from these)

dave

 

[Melon Head]

I have these speakers and am quite willing to experiment for the benefit of all.
However I would appreciate experienced direction/advice, having never done any of these mods, I know absolutely nothing

 

[planet10]

Melon Head,

eMail me directly and i'll help as i can. Do you have Ed's kit?

dave

 

[Melon Head]

I have absolutely nothing.

I will do one driver at a time so I can make a direct comparisons. However the comparisons will only be subjective listening tests, which in the end is all that matters I suppose.

 

[planet10]

With EnABL you really need 2 to fully appreciate the difference as it has to do with increased downward dynamic range improving the 3d soundstage.

But still, one has to work with what they have.

dave

 

[Joachim Gerhard]

Here is a picture of the modified SEAS wideband, a view into the multichamber cabinet and the reflex tubes.

 

[Melon Head]

With EnABL you really need 2 to fully appreciate the difference as it has to do with increased downward dynamic range improving the 3d soundstage.

But still, one has to work with what they have.

dave

I obviously have two drivers, but I thought if I treat both of them at the same time then it might be difficult to give a fair unbiased evaluation of the modifications. That is it won't be possible to do an a/b comparison.

 

[planet10]

I obviously have two drivers, but I thought if I treat both of them at the same time then it might be difficult to give a fair unbiased evaluation of the modifications. That is it won't be possible to do an a/b comparison.

True, but mono vrs mono won't tell you anything about one of the largest beenfits of EnABL.

Treating them both won't allow any direct comparison.

dave

 

[Melon Head]

Oh well I guess I will just mod both at the same time

 

[Kradkate]

Hi Karten

very short:

both graphs, the black (Gradient AX8) and the red (Seas FA) are nearly parallel in all grafs. This means: both drivers should give nearly the exact performance in that enclosure.

Slight differences in impedance - who cares ?
or max SPL: here the Seas is "better" - probl. higher x-max ?

Don't care about the "high" towards deeper frequencies - it's a simulation, that excludes the effects of the small baffle-width.
The measurement (follow links) provide a perfekt fit.

Hello Joern,

thanks...I understand yozr message.

regards
Karsten

 

[planet10]

Another advantage, from a practical POV, if you do them both at the same time, the individual treatments will be closer together.

dave

 

[Kradkate]

Here is a picture of the modified SEAS wideband, a view into the multichamber cabinet and the reflex tubes.

Hello Gerhard,

thats very intressting a kind of horn with reflex tunnel!?

regards
Karsten

 

[Melon Head]

OK thanks

So I want the following
Phase plugs
EnABL

Anything else?

 

[planet10]

I would follow the same basic recipe as for the FE167 here. The only change would be to move the rings to EnABL2 locations.

dave

 

[Joachim Gerhard]

Karsten, i call it a multiresonator. I am still working on it. At first i put the reflex tube on the top near the driver. That created something like an anti resonator so there is little energy under 70Hz. I will now try to put the reflex tube at the bottom in the last camber and see how that works.

 

[JimM]

Scottmoose:
How critical is the enclosure volume as outlined in first post? If I brace up the enclosue as recomended by planet 10 do I need to increase volume per the bracing?

 

[planet10]

Scottmoose:
How critical is the enclosure volume as outlined in first post? If I brace up the enclosue as recomended by planet 10 do I need to increase volume per the bracing?

ML-TLs are usually pretty tolerant. If worried and if you use 18mm material, increase the width by 12mm.

dave