Philips AD12100-hp8 on open baffle ??? - diyAudio
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Old 1st November 2007, 02:57 PM   #1
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Default Philips AD12100-hp8 on open baffle ???

I found a couple of these speakers (philips AD12100/hp8) second hand.
IF possible I would like to make an open baffle effort (with helper tweeter??)
There is not very much info on the net about these.
Anyone who has any data about the AD12100-HP8 ?
Anyone who tried them in open baffle ??
Every help is welcome!!

Leon
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Old 16th November 2007, 09:15 AM   #2
Empee is offline Empee  Netherlands
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Hi Leonidas,


What did you do with these drivers,
what's your verdict?

I'm a proud owner of a mint pair of these,
wondering what to do with them.....


Was thinking of an Onken-style enclosure,
but am also considering Open Baffle....

Did you find some T/S parameters?


Cheers,

Empee
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Old 16th November 2007, 10:08 AM   #3
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Hallo EmPee,

Thanks for the interrest. For the moment I'm using them open baffled (will send pics later on this weekend).
Did some experiments with "helper tweeter", because of my 24 years old daughter, who heard some missing highs.For the moment the best sounding tweeter is a Siare TWRV 1090.
They realy sound wonderfull and warm.
In fact they sounded more pleasing then my fostex fe 166 horns.
So I will continue experimenting.
I'm aiming for something like the supravox open baffle.**
Couldn't find any TSP's for them. So I'm using the TSP's from another very simular looking Philips: AD 12252/HP ( Fo 55 , Qt 0,69, Vas 111L), which looks from the outside very simular.
This indicates Open Baffle will be the right approach.
Onken encl. will be no good; to high Qts (0,69).
Because there were no reactions at all, on this post, I went on on my own. But from now on I will post more to lett you know how things are going in the future.

Leon.

I did try to attach the supravox open baffle file, but it is to big.
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Old 16th November 2007, 10:10 AM   #4
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Some info on these speakers:
http://www.hupse.eu/radio/speakers/AD12100.htm

As the hi-tones cone is not available in your model you have to add a simple dome tweeter. A series capacitor (tuned to the right sound) will do. Its nice to mount the tweeter in the center of the speaker with a metal strip or so.

Open baffle needs to be at least 1 m2. Open box (foam damped on the walls) will do as well. I thought Philips advised a 120 liter BR.
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Old 16th November 2007, 11:23 AM   #5
Empee is offline Empee  Netherlands
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Default Philips speaker encoding

oh, but mine DO have the whizzer cone !


As far as I understand the Philips encoding
(please correct me if I'm wrong)

the /M is the standard fullrange (whizzer) 25Watts max.

the /G is the Guitar version, with a heavier cone,
so less extention in the highs. Will take 25Watts as well

the /HP version is "high power" and can take 40Watts.
but should be the same as the /M (response wise)

only the /W version is without a whizzer, as the 'W' stands
for 'woofer'

There's also a MFB version, wich stands for Motional FeedBack
(has a piezo pick-up behind the dome wich picks up the movement
of the cone, sending it back to a specially designed amplifier
who corrects any irregulation between the original signal and actual cone-movement).



....Would love to know the T/S parameters on these.....
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Old 16th November 2007, 11:55 AM   #6
Empee is offline Empee  Netherlands
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Question Planet10, have you got info on Onken's ?

By the way,
what kind of QTS figure does an Onken 'need' ?

I'm confused,
the Onken was developped in a time when no speaker
reached a OTS of under 0.50 ?

I also got a pair of Philips AD1065/M8's,
anybody got spec's on those ?

Maybe those are fun for an Onken!

Cheers,

Empee
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Old 16th November 2007, 03:39 PM   #7
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Maybe this helps for the guys that need T/S before the woodworks.

http://sound.westhost.com/tsp.htm
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Old 16th November 2007, 03:54 PM   #8
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I do own some measurement system called DAAS.
Haven't used it for several years. Most of the time I use my ears.
Will start DAAS up on sunday, trying to get some results.
"Add mass" method will be used.Have to look for some modelling clay (mass) as well next day.
Post results later.
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Old 16th November 2007, 05:02 PM   #9
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Hello,

I have a set of AD1065/M8's and have tried to measure the Thiele/Small parameters on it. I don't think the method I used was very accurate, so I will try again soon, but I measured an Fs around 50Hz and a Qt that was higher than 1. I will post my measurements based off of the method on Rod Elliots site.
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Old 10th December 2007, 02:39 PM   #10
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Some pics of open baffle experiment.

started with "doors" and added wings later.
for the moment 1,5 uF on tweeter and 3,9mH on woofer.
ad12100/hp8 runs full range.

used The Edge.

pic 1 : 2 speakers in room.
Attached Images
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