604B - Can I - Should I fix this?

**mattvandyke** · November 6th, 2012, 07:53 PM

This is a 604B that purchased about 2 years ago. I've built the Jeff Markwarts 604B crossover and I'm in the process of starting to build some cabinets for this and another 604B that I have. I'm going with the Stonehenge III cabinets.

Question, the HF horn in this speaker is not aligned with the woofer. Is this something that I could fix and/or should fix? The misalignment drives me a little crazy and I'm planning on keeping these speakers for a while.

Here is a picture of the front and back.

Your thoughts?

**gearfreak** · November 6th, 2012, 08:48 PM

Originally Posted by mattvandyke

Question, the HF horn in this speaker is not aligned with the woofer.

Not aligned in which axis?

Maybe the intention is: not concentric?

* Hard to tell with the shadows/lack of precise 'down the barrel' shot, at least for my eyes.

**hemicuda** · November 6th, 2012, 09:25 PM

That would drive me crazy too! I would just go ahead and redrill the holes where they needed to be to align it correctly. I'm sure it's got to be affecting the stereo image being off like it is. How much, I don't know. That's my 2 cents...

**cradeldorf** · November 6th, 2012, 10:42 PM

Yep, I'd just redrill them too.

**Alien_Shore** · November 7th, 2012, 12:51 AM

I would also add a few more bolts there. Hanging a speaker that heavy off of 4 mounting bolts seems risky.

**voice of the theater** · November 7th, 2012, 12:36 PM

Originally Posted by gearfreak

Not aligned in which axis?

Maybe the intention is: not concentric?

* Hard to tell with the shadows/lack of precise 'down the barrel' shot, at least for my eyes.

The photos are so dark I couldn't tell much either. I lightened them up with photoshop so everyone can get a much better look at it but from the camera angle it's still hard for me to tell how far it's off. Regardless, even if it's only slightly off, it would seriously bother me as well....

**gearfreak** · November 7th, 2012, 01:45 PM

aaahhh. I see now. yikes on the back.

If that's the way it was built, I'd leave it, it they were mine. Unless it's audibly noticable for some reason.

**mattvandyke** · November 7th, 2012, 02:55 PM

I don't think that they were manufactured that way, I think that when the woofer was reconned it was done that way. My guess however is that the entire speaker would have had to been taken apart to offset the speaker that much.

The woofer recone is marked WHF 5309 - any idea who manufactured this?

Luckily the other 604B has the original paper cone.

Thanks

**604man** · November 7th, 2012, 03:59 PM

The speaker basket has multiple mounting holes, align so the horn is horizontal.

*DON'T RIP THE SPEAKER CONE*

**cradeldorf** · November 7th, 2012, 06:51 PM

Originally Posted by 604man

The speaker basket has multiple mounting holes, align so the horn is horizontal.

*DON'T RIP THE SPEAKER CONE*

The horn would have to be aligned with the bolt holes in the front picture to be able to just rotate it in the cabinet. It needs specially drilled holes to put the horn horizontal. Also since vott lightened the pictures I can see that this one has the accordion surround where you say the other one has an original cone which has the half roll paper surround. You might want to do an t/s test to see if they both have a close Fs. I'm betting they don't, the original is probably more like 53hz where the accordion is probably closer to 25hz.