Author Topic: Vintage Philips 9710 speaker build  (Read 1048 times)

Online Curlycat

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Vintage Philips 9710 speaker build
« on: September 30, 2017, 09:12:57 AM »
A while ago I purchased a pair of vintage Philips 9710 full range drivers from Mr Kent Kassler. The speakers are in lovely condition, thank you KK! On an open baffle plankie they sounded promising. Very bright but with a lovely open sound and loads of detail. So, I decided I will scrounge the net and find a suitable box to build for them, not wanting to spend a lot of money. I thought a big bass reflex box would help damp the brightness a bit and help with good bass reproduction. I used plain cheap laminated pine. I am not a carpenter, I find it easy to work with pine. Yes, yes, I know it is sacrilegious to use solid wood, but I like to experiment and try things for myself.

This is the box plan I decided to go for. It was designed for the Philips 9710 drivers. There are quite a few designs available on the net for the Philips drivers. I modified the look a bit.







« Last Edit: September 30, 2017, 09:33:32 AM by Curlycat »

Online Curlycat

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Re: Vintage Philips 9710 speaker build
« Reply #1 on: September 30, 2017, 09:46:26 AM »
The wood was cut at Penny Pincers (Buco) They did a fine job. The only tools used with this build was a router, a drill, screwdriver, hand saw and a hand plane.

Next up was to start with the assembly, lots of gluing and clamping.



The boxes are quite big, about 120 liter each.





Here the back bracing is installed that will hold the back panel in place. It will also help stiffen the cabinets.


Online Curlycat

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Re: Vintage Philips 9710 speaker build
« Reply #2 on: September 30, 2017, 09:57:04 AM »
Marking and drilling many, many holes for the back panel and test fit.



More bracing for the sides. It also spaces the stuffing away from the walls of the cabinet. This is according to the plan. I also remember reading on some websites, not related to the Philips drivers/box that it improves the sound, something to do with the damping... not sure if it really makes a difference, anyway, it helps to brace the cabinet. More or less as per the schematic. I only had the sketch above in my first post to work with. Nothing else.




Online King_Julian_S

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Re: Vintage Philips 9710 speaker build
« Reply #3 on: September 30, 2017, 10:55:54 AM »
Still have 4 of these .. :popcorn:
Non audiophile music lover...

Offline Family_Dog

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Re: Vintage Philips 9710 speaker build
« Reply #4 on: September 30, 2017, 01:51:07 PM »
This build fascinates me, a job very well done! Can't wait to see the end result and hear your opinion of the audio quality. I have a suspicion it will be most positive.


-F_D



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Online Curlycat

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Re: Vintage Philips 9710 speaker build
« Reply #5 on: October 01, 2017, 10:33:31 AM »
Thanks guys. I decided I wanted to be able to remove the front baffle easily and interchange with different baffle/driver configuration. Hence the back panel of the box is easily removable and the front baffle too. To give the box more rigidly, to break up the straight lines and add a bit of interest, I changed the front design from the original drawing.

Driver holes cut and edges bevelled. Test fitting the baffle.



Test fitting the side baffles. The sides are permanent and not removable.





Online Curlycat

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Re: Vintage Philips 9710 speaker build
« Reply #6 on: October 01, 2017, 10:41:31 AM »
Chamfering the side baffles.





Gluing them in place.




Online Curlycat

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Re: Vintage Philips 9710 speaker build
« Reply #7 on: October 01, 2017, 01:28:55 PM »
Adding the ports. I was torn between doing a rectangular port or doing a round port. The rectangular port looks better in my opinion, vs the ease of tuning, round ports. Doing a round port would be much easier to tune afterwards with pieces of PVC pipe. In the end I decided to use three 50mm ports which allows me to easily slide various lengths of 50mm pvc in to tune.


Online Curlycat

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Re: Vintage Philips 9710 speaker build
« Reply #8 on: October 01, 2017, 01:51:29 PM »
So the staining begins. I used Woodoc no5 with Woodoc Teak stain concentrate. Because pine is so porous it will blotch easy when staining, leaving an ugly result. I semi sealed the cabinets first with a light coat of Woodoc no5 and turpentine. Sanded it down and started to stain. I also sealed the inside with a decent enamel black paint. Hopefully it will allow very little moisture ingress during the cold wet winter and not cause much cabinet movement because of the moisture content in the wood.

Sealing coat:



First coat of many light coats.








Online Curlycat

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Re: Vintage Philips 9710 speaker build
« Reply #9 on: October 01, 2017, 02:09:58 PM »
I used the cut outs of the ports for the feet. I needed to cut two more. I glued them to the bottom. On top of it, I screwed big galvanized fender washers, just to break the black a bit. On top of the fender washers I glued rubber grommets to isolate the speaker from the floor.








Offline Family_Dog

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Re: Vintage Philips 9710 speaker build
« Reply #10 on: October 01, 2017, 02:32:53 PM »
These are lookong sooooo good!!


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Offline Richard

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Re: Vintage Philips 9710 speaker build
« Reply #11 on: October 01, 2017, 07:04:58 PM »
Very nice, well done so far. Looking forward to your next update.
PASSION FOR SOUND, DESIGN, FORM & FUNCTION | GSTUDIO.CO.ZA

Offline HBAutomation

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Re: Vintage Philips 9710 speaker build
« Reply #12 on: October 01, 2017, 07:43:00 PM »
Awesome that you don't have to worry about the finish! (BIG PLUS). I hope the solid pine works!

Offline Steerpike

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Re: Vintage Philips 9710 speaker build
« Reply #13 on: October 02, 2017, 12:18:44 AM »
They are a very nice loudspeaker driver. Its interesting to think that this level of sound reproducion was available to "ordinary" people in the 1950s, yet there is still a myth that exceptional audio only came to the home in the 1980s.

These are the 800Ω version:

Offline El Sid

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Re: Vintage Philips 9710 speaker build
« Reply #14 on: October 02, 2017, 09:02:14 AM »
Lovely Curly! Can't wait to see the finished product. Particularly curious because I've been tempted to buy a pair of those drivers myself