Help Needed for Norelco AD5200 12"

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Norelco

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#1
Help Needed for Norelco AD5200 12"

Presently im using my Norelco AD5200 in to my open baffles (Old Japanese design) i seen from JElabs. but now im planning to build cabinet. please advise on which existing designs i can use.. is it possible to use a horn loaded design? if possible pleeease send drawing..😀

Thank you very much in advance..

Regards🙂
 
#2
Hi Norelco,

I have a pair of Philips AD12202 similar to your Norelco AD5200. I fitted them in a Backloaded Horn Enclosure. They produce very good sound. Warm, smooth and rich bass. The enclosure is emulated JBL C34 design. The following is the enclosure design:

An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.




Good luck!!! Cheers!!!😀 😀 😀


David
 
#3
Thanks for the advice😉 , did you put add'l tweeter to support the hi frequency? sorry i cannot view the pictures you inserted to your reply.. what amplifier are you using? do you think is it ok to use into a ST70 Dynaco power amp?? if is ok to you to you to post the plan / drawing?😀

Thanks & Regards
 
#4
Hi Norecol,

The Philips AD 12202 is quite easy to drive with most tube amps (300B, 6v6, EL84, Darling amp 1626 etc...). I do add a super tweeter to cover the high range as it roll off at 12,000hzs.

The amp in the photo is Consonance M99 plus, Rated at 20W. Very sweet and smooth sounding amp. Your Dynaco ST70 should have no problem with the AD5200.

You can see the enclosure plan at this link:

http://www.lansingheritage.org/html/jbl/plans/C34.htm
An externally hosted image should be here but it was not working when we last tested it.


Good Luck!!! Cheers!!!
🙂 🙂 🙂
 
#6
Hi Norelco,

I put rock-wool in the enclosure (as indicated in the attached picture) as damping material. It is advised that you don't put too much damping in the enclosure as it may make it sound dead.

It is also advisable to use 3/4" plywood to make the box.

An externally hosted image should be here but it was not working when we last tested it.


Good luck!!!😀 😀 😀
 
#10
I happen to have a 5200M sitting here at my desk. I just ran some measurements. Someone should be able to help you use them to figure out an appropriate enclosure:

Re=4.72 ohms
Fs= 43.07 Hz
Qts=0.533
Qes=0.571
Qms=7.975
Le=0.154
Mms= 32.96 grams
Vas = 183.1 Liters

On axis 1W/1M:

An externally hosted image should be here but it was not working when we last tested it.
 
#11
Wow that's quite a coincidence!

Thanks so much for the Theile parameters. I've been searching for them for ages. I'll have to get the calculator out.

I'm leaning towards a BLH or a bass-reflex for some reason.

Any suggestions? :cheers:
 
#12
I myself have very little experience designing enclosures. I'm only just starting. I know that Philips originally intended them for bass reflex enclosures - I think 100 or 150 liters. But I'm sure something better can be designed today.
 
#13
Well, just plugging the numbers into a calculator, it wants a ~459.11 L vented cab tuned to ~33.1 Hz for am a maximally flat response. the smallest practical cab would be ~127.15 L, so how much bass extension can you afford in cab size?

GM
 
#16
Absolutely! This is true for virtually all 'FR' drivers, especially vintage ones, though they typically have rising rate suspensions to both protect them somewhat and make this nonlinear distortion sound euphonic in the process.

GM
 
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