Does anyone in the US have the ability of machine the M2 horn flange for a lower cost

[TimG24]

I have looked through the M2 build thread. It would be nice if we could potentially arrange a group order for some flanges to serve the purpose of the flange 5026224 that is currently $120. The addition of holes to mount the 2451, with the larger bolt pattern, would also allow more people to try out the M2 horns. Forgive me if someone has already offered such a device. I know you have to pay to play, but it seems like a part that should be included in the price of the horn. If it was $60 I would have no problem buying them, but $120 is hard for me to spend, it I don't need to.

My brother is a machinist, and he has fabricated aluminum bike parts for me in the past. However, he would not be allowed to produce hobby projects at his current job. I would be interested in 3 flanges.

[tjm001]

I have looked through the M2 build thread. It would be nice if we could potentially arrange a group order for some flanges to serve the purpose of the flange 5026224 that is currently $120. The addition of holes to mount the 2451, with the larger bolt pattern, would also allow more people to try out the M2 horns. Forgive me if someone has already offered such a device. I know you have to pay to play, but it seems like a part that should be included in the price of the horn. If it was $60 I would have no problem buying them, but $120 is hard for me to spend, it I don't need to.

My brother is a machinist, and he has fabricated aluminum bike parts for me in the past. However, he would not be allowed to produce hobby projects at his current job. I would be interested in 3 flanges.
Just out of curiosity I looked it up on Speaker Exchange's website. Are you saying it's a machined piece of aluminum? The picture kind of looks like a stamping. If it is a stamping, it's an outrageous price!

[TimG24]

I cannot tell from the picture if it is a casting, a stamping, or a machined piece of rare aircraft aluminum, but if there is anyplace to save money on building an M2 clone, I think this is it.

[NWCgrad]

There was a person on AVSforum earlier this week inquiring about people's needs for CNC of metal parts. Could be a viable approach.

[pos]

It is machined.

Member sebackman published the plans for an universal adapter, fitting both 2451/2447 and 2450SL/476/435/243x bolt patterns.
It is somwhere in the M2 thread.

I have both versions here (the JBL one is not mine) and both are a perfect fit.

[1audiohack]

I will take a look at one of mine tonight. We have 55 HP live tool lathes that would make quick work out of them if I could part them from bar but that is diameter dependent. I don't know off hand the diameter of these. Otherwise from plate in the mill would be easy.

We have made throats so what the hell.

Barry

[pos]

Here is Robert's plan: http://www.audioheritage.org/vbulletin/showthread.php?36789-Compact-monitor&p=375178&viewfull=1#post375178
I can take precise pictures of both this and JBL's adapters if required.

[Wagner]

Just out of curiosity I looked it up on Speaker Exchange's website. Are you saying it's a machined piece of aluminum? The picture kind of looks like a stamping. If it is a stamping, it's an outrageous price!
It's a gouge if it's machined

[tjm001]

It's a gouge if it's machined
You're right. Just not as deep though.

[Ed Zeppeli]

Where do 3D printers fit in with all of this?

[srm51555]

Where do 3D printers fit in with all of this?

I also thought of that too.

I tried to have buddy use his shop to machine a pair, after I told him they were only 120 a piece he suggested I just buy them. I did and really glad I did because If I need to get out of them they have OEM flanges. Just a thought.

Thanks,
Scott

[grumpy]

You're right. Just not as deep though.

:rotfl::rotfl:

[sebackman]

Dear all

I'm going to machine a few sets for friends here in Europe in a few weeks. It would be feasable to make 10-20 sets for the US if of interest. POS can comment on quality.

They are aircraft quality aluminium and can house both the small and large JBL bolt circle.


Kind regards
//RoB

[pos]

POS can comment on quality.
http://www.giraffeboards.com/images/smilies/thumbs_up_smiley.gif

[1audiohack]

So looking closely at my JBL plates, they look to be from extruded plate, with all holes milled, the ovals hand deburred on both sides and all the OD features and one face lathe turned.

I can't bar feed 6 inch so would likely make them from plate as well but likely keep it an all mill project.

I'll do a cost analisys if there is interest but I already have my plates so it wouldn't be a G job. I know for sure that I can beat the retail cost by twice, easy.

Barry.

[1audiohack]

If l sebackman is going to run some more, piling on his run would probably be a good bet since he has already done them.

Barry.

[TimG24]

Should we start a list for a group purchase? That way we could determine how much interest there is. I don't know if you want to take on the hassle of shipping this stuff out to multiple different addresses. Since I would like to get some, I would be willing to send out the plates to other members in the U.S. if we can arrange a group purchase and send them from Europe in a single shipment. I am interested in at least 2 adapters with the small and large JBL mounting pattern. I already have a pair of 2435 that I would like to try on the M2 horns.

[sebackman]

Dear all,

I will check with my source about pricing and availability. Sometimes when they have set the CNC machine for long run's it may take a while to get stuff done.
If ok and there is an interest I’d rather send to one or two addresses for distribution in the US if acceptable. This would also keep cost down I think.

If of value, please use the drawing to make your own adapters. We use Aircraft quality aluminum that we water cut to correct outer diameter and then turn down the inner part in a lathe and then finish them of in a CNC machine.

There is much info in the other threads about how to mount them to the horn. I use M6 recessed bolts

-Will revert during the week

Kind regards
//RoB

[SMT]

I believe "weltersys" on DIYaudio forum mentioned the capability on this thread:


http://www.diyaudio.com/forums/multi-way/283295-jbl-d2430k-mounting-issues.html

[cooky1257]

So, and apologies if a stupid question....am I correct in assuming an adapter isn't needed when using a 2452/M2 Horn combo?

Thanks

[Don C]

Not correct, the adapter plate is needed with the 2452 driver. Or any other driver. You will need to modify the adapter plate to accept flat head screws. This is because the 2452 is a little larger than the D2 driver, and covers the screws that fasten the plate to the horn. Look at the photo here. (http://www.audioheritage.org/vbulletin/showthread.php?37127-Experiments-with-M2-horns&p=378032&viewfull=1#post378032)


So, and apologies if a stupid question....am I correct in assuming an adapter isn't needed when using a 2452/M2 Horn combo?

Thanks

[cooky1257]

Not correct, the adapter plate is needed with the 2452 driver. Or any other driver. You will need to modify the adapter plate to accept flat head screws. This is because the 2452 is a little larger than the D2 driver, and covers the screws that fasten the plate to the horn. Look at the photo here. (http://www.audioheritage.org/vbulletin/showthread.php?37127-Experiments-with-M2-horns&p=378032&viewfull=1#post378032)

Ah yes gotcha. Thanks Don.

[srm51555]

Hey Guys, any update on the group buy?

Thanks,
Scott

[mefisto]

Greetings all,

if there is still interest, I could ask my friend. Is there a mechanical drawing of the adapter available apart from the one posted by Robert? Are all the holes shown there required? How many pieces would people be interested in?

Kindest regards,

M

[Flodstroem]

I would be interested in a pair but shipping should be to Norway if possible :)