ME150H detailed Information

[Guido]

Here I will post some informations regarding the ME150H which uses the same magnet and frame than the 2227H.

Top plate thickness = ~13mm
Extented pole piece thickness = 26mm
Magnet thickness = 22mm
Magnet diameter = 223mm

First two pics
Top and side view of the extented pole piece of the SVG magnet structure

[Guido]

First pic
SVG technology

Second pic
Detail copper shorting ring

Third pic
Detail both shorting rings. Top = copper, lower = aluminium

[Guido]

Here one can easily see that the frame structure of this SVG driver is completely different than the 2225/2235 structure.
The pic shows the 2227 winding which is sitting much "deeper" than a 2235 winding.

BTW:
Unbelievable how someone can burn a 2227 coil this way

[Guido]

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[Guido]

Placeholder

[Guido]

Front and back of the cone is aquaplased.

Very interesting is that the front of the foam is also aquaplased. The back of the foam is not aquaplased.

The tinsel lead fixation is different also.

Winding length is ~29mm which results in an Xmax of +-8mm. And this with a 13mm top plate! WOW!

[spirou38]

Front and back of the cone is aquaplased.

Very interesting is that the front of the foam is also aquaplased. The back of the foam is not aquaplased.

The tinsel lead fixation is different also.

Winding length is ~29mm which results in an Xmax of +-8mm. And this with a 13mm top plate! WOW!

Hello Guido,

Great pictures an very interesting informations

Do you mean that the ME150HS recone kit is available from JBL ?At what price ? Is the foam suspension also available ?

Pascal

[spirou38]

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Hello Guido,

I can't access to T/S parameters before & after breaking in

Pascal

[Guido]

Hello Guido,
Great pictures an very interesting informations

Thanks! I'm still working on it.

Do you mean that the ME150HS recone kit is available from JBL ?At what price ? Is the foam suspension also available ?
Pascal

Yes, the C8RME150 cone kit is available. I can order it for you. Send me a PM if you need 2.
The foam isn't available! At this particular speaker the foam is aquaplased. I've never seen this before.

[Guido]

Hello Guido,
I can't access to T/S parameters before & after breaking in
Pascal

My fault!
I did this placeholder in good hope to start T/S measurements. Then I killed my measurement system
New system is on the way

At the moment I'm beating the hell out of them to break them in.

1st rough Fs measurement showed 47Hz!! After beating them a bit it dropped to 39Hz.
Still out of spec!!

The spider is very stiff and the foam also due to the aquaplas on it.

[Guido]

So, finally I've setup my new measurement system and managed to measure the ME150H for future reference.

Sensitivity is ~95dB
Le is ~1,18mH

I'll still break them in a bit


Here are the T/S Specs for Speaker 1

[Guido]

Speaker 2

[spirou38]

I'll still break them in a bit

But don't break them

[Guido]

I do not have the 10 cuft closed test box from JBL.
So I used my 4435 low chamber. 5 cuft tuned to 27 Hz.

Red = 2234H
Blue = ME150H

First graph: BB6
Second graph: real measure
BB6 says a bid more output for the ME around 30 Hz but it's not.

Very interesting how close these 2 speakers measure. Didn't check how they sound in comparison yet.

[Guido]

But don't break them

I hardly believe one can kill those beasts