What to do with a Philips AD9710 fullrange

[jean-paul]

Jaap, who is of course of Dutch origin and thinks that certain Philips product were underestimated in the past

Hi Jaap, wait till you buy a TV set of the Philips brand or a coffeemachine.
For example I bought an expensive coffeemachine some time ago and found it cracked right in the middle from top to bottom when I came home. It had served us for a week. Not to speak about Philips car-radios.
Although I know some very talented Philips engineers that I have high esteem for I think the quality of Philips stuff could be better... ( like they say in their slogan ! ). To be honest it is a while ago I bought my last Philips product apart from their fantastic Senseo Crema. Don't laugh at me, a good coffee machine is essential for DIY ing audio. Makes one more relaxed.

Philips as a company has made impressive great inventions but after the first product the second generation is lighter, cheaper and quality lower. To me it is not a surprise the japanese companies do it better in the audiomarket.

A few weeks ago I spoke a Philips shaver engineer and he did his best to convince me of the high quality of the used materials in Philips shavers. I wouldn't know cause I use blades

Older Philips cdplayers are still prefered by me over modern machines. Their CDM mechanisms were/are superb and it is a shame they are not produced anymore.

regards,

Jean-Paul (who is dutch of course as well and would love to buy gear from a national brand if it was really good )

[phase_accurate]

hi jean-paul

My experience with some Philips products is the same as yours.
Personally I think their R & D department has some of the brightest heads in the electronics business worldwide.
But I think their financial department is developing the enduser products, using a tool that is called "Rotstift" in German !

Regarding the AD9710:
Is the VAS of this small driver really that large (100 liters) or could this be an error ?
Maybe a small open baffle + additional woofer would be a good application for this driver (also keeping the small xmax in mind).

Regards

Charles

[Jaap]

Jean-Paul for the most part you are right I suppose, at least for the coffee part.

It could be that Philips is now on a different road, at least it seems so with their new dvd-963sa player. It has stunning video capabilities but it is worth its money as an stand alone audio player.

I bought one last week and the first minutes right from the box it sounded already very promising. It was certainly in the same class as my well burned in scd 555es player.
It uses the ad1955 dac and opamps in the analog stage. It has a switching power supply, but a good one I heard.

I myself lack the knowledge but I hope that one of the digi's on this board is going to study this machine for tweaking and gives us a recipe.

hoi,

Jaap,
who discovered that the last commercial loudspeakers from Philips (top model FB860) is greatly overlooked by the audiophile masses. Reason for this is the prejudice that Philips never made quality audio gear. Any dutch guy who wants to sell a FB860 to me is welcome. I am prepared to exchange for a Philips coffee machine

[boessenkool]

First of all I would like to thank anyone for the response.

1 - Jaap,

You mention the Philips publication: "luidsprekerbehuizingen voor zelfbouw" (loudspeaker-enclosures for diy). Is this the small A5 sized, orange colored booklet? If so, then I will I have this somewhere laying around.

2 - Phase_accurate & Jaap,

Perhaps a trial with an open baffle is a worthwile experiment. After that, I can always add a extra woofer. Something like the BassZilka

3 - Anyone

Can anyone hint me a direction, if this unit is any good in a tml, tqwp etc?

Luuk

[Jaap]

boessenkool (staphorst ?),

My philips booklet (yes A5) is blue but i know there were yellow ones (other year almost the same text).

9710 is very good in TQWP, see for instance http://home.planet.nl/~dht_rob/
(dutch section), he can tell you more.

A good combination is the 9710 with the famous Philips Bombardon Woofer (AD5201 S77) in a closed box: see the philips booklet, number A13.
If you press me I could sell you 2 bombardons.

regards,

Jaap

[boessenkool]

Jaap,

Can't find my Philips booklet. So I will have to search another one.

I have looked into the site of Rob. As a matter of fact I'm buying the units from Rob. He's living close by, so I will go there myself.

I'm very tempted by the Bombardons. If it's okay with you, I would like to use first the AD9710 alone and get back to you later about this.
As it so happened a couple of weeks ago, I bought an old issue of Radio Bulletin (1965) and it featured the ad9710 and the Bombardon. But the desing looked a bit weird. Also the article was continued in the next issue.............. alas.


I have downloaded the free demo of Mathcad an the tml worksheets from the site of Marting King's site.

(http://www.quarter-wave.com/)

This looks like a very good way, to make an educated guess. (Because I'v built a tml before and I couldn't solve the dip and the spl at about 180 Hz). But the demo-version wont work on my laptop. I've got some possible solutions from Martin King personally. (Martin, thanks again.)

Luuk Boessenkool

(roots in Rouveen and Dedemsvaart)

[Martin Dellstig]

Hello!

Jaap:

Could you please give som information on the box with AD5201 and 9710?

I have these units myself and have not decided what to do with them yet.

I am rather fond of the 9710 myself, it is amazing that such old units still are existing after so many years.

The 9710 was used in the Swedish Carlsson speakers in the fifties, sixties and into the seventies.

Best regards

Martin

[mark9710]

For everyone who is interested there is the original building plan with crossover when you follow this link;
http://people.zeelandnet.nl/willemj/dutch/bombardon.htm
It is in dutch only,but if you need help i can translate it for you.

Greetings Mark

[fsgert]

I was happy finding this subject here.
I am still using the 9710M as my main speaker system.
Once mounted in a huge bas reflex box, 1968, I later build the 40l design from the booklet mentioned above.
Added 2 dome tweeters so the 9710 is doing midrange only, for which task it is suited best of all.

Problem is, the edges are deteriorating, and I am looking for a replacement.
Anyone?
Nice in-depth article on 9710 and more famous speakers:
http://www.troelsgravesen.dk/philips9710.htm

[Vathek]

Since this thread has been reactivated, I take my chance and hope that some of the dutch here can maybe answer my question I asked in the loudspeaker forum regarding 9710 and bombardon.
Cabinet Plans for 9710 and Bombardon
Sorry if this counts as double post.
Thanks a lot.