ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Both wires a grey but if you take a close look then you will see one wire has a stripe at the side (right wire on the picture). That should be the plus!
Brengen & Ophalen
Thank you for yor answer.
The speakers are still in the boxes.
I am planning to reconnect them next week.
You are writing "that sholuld be the plus".Are you 100% sure about that!.
And is there different wires among the pentas?
i am not doubting you,but i just want to be guit sure .
What will happen if i connect the wires wrong?
Pag
I'm 100% sure that the marked wire is the plus. But I mentioned "should be" because I was hoping some experts here could confirm my finding. Let's wait for someone to react like member "Beobuddy" who's an expert in recapping/repairing Penta labs or better send him an PM.
I always connect the marked wire as +ive.
Regards Graham
Thanks Graham, now I'm 200% sure I did it the right way!
Thanks Leslie for the command.
Indeed as mentioned, the wire with the stripe is the positive lead.
Connecting wrong will not damage your speaker and even not noticable if you're doing it on both speakers.
As long as you are connecting the speakers the same way, it will be right. Only if the penta(s) are the only speaker(s) in the room. If they are a part of a surroundystem, the leads have to be connected the right way. Which of course is preferrable.
Thanks to both Leslie and Beobuddy.
Thanks another time for the great Help from both of you.
Another problem.
I have also another beoalb penta mk3 from1996
1)How can i remove the cover over the midrange and woofers?
2)One midrange have foam rot.
Where can i buy new midranges?
Andreasi995: Thanks to both Leslie and Beobuddy. Thanks another time for the great Help from both of you. Another problem. I have also another beoalb penta mk3 from1996 1)How can i remove the cover over the midrange and woofers? 2)One midrange have foam rot. Where can i buy new midranges? Pag
And Graham not to forget!
How to remove the cover? Grab one side with your fingers into the cloth and pull with a little force.
New midrange? Try to refoam, cost you less then a few euro's each and do all 8 of them.
Of course,thanks to Graham too for his very good help.
Refoam?
Can you tell me how to do that.?
I have never tried to repair a midrange in the beolab penta.
How much work is it?
Try Youtube, enough video's to look at!
Btw, I got myself another pair of Penta's 3 but unfortanetely the mirror base is badly scratched with black spots and the cloths needs to be replaced. Just did the 2 large grills and replaced the original cloths (dirty and with holes) with new black speakercloth. All midrange driver needs a refoam job so enough work to do on these giants!
But, still using these "Good Hifi" rings
I'm a good customer of Good Hifi, bought many rings....
I've bought several rings from Good Hifi for several different speakers. But not for the penta. (bought them, didn't use them)
With all my respect and in my humble opinion are these rings not suitable enough. But you already know this and it has already been discussed in the workbench section.
But for the time being...
I know the rings are a tiny bit to small but I can manage! Any other suppliers in Holland who has the exact size?
No, I haven't found one which supplies the correct rings either.
I only know which firm can restore them with correct ones. But they won't give the details...
I think it was GTS who found the correct rings with all the correct diameters in the US. Prizely, but it fits.
Apart from the tiny (Glue) part, the angle of the inner ring, which lays on the conus, hasn't the right angle and gives the conus a kind of pre-tension. So the sound of the conus is affected and thus the overall performance is affected by that.
I will continue to search for the right rings....
Thanks Beobuddy for your explanation, makes lot of sense!
Btw, I reclothed my Penta 3.
What type of clothing did You use ?
This one, great stuff!
What glue are you using?
//Bo.A long list...
I bought rubber rings from Good HiFi and found them a little to small but manageable. Second time I bought foam rings from Audiofriends (all for Penta midrange). They where more accurate in size and easier to work with. Of course the foam ring had to be changed again around 2030
Bos00: What glue are you using?
Tesa double sided tape
Hello again.
I have take a time out by the discussion by refoaming the midrange of the pentas.
Where can i buy the best ringgs for the pentas.
Leslie prefer the Good hifi.
Beobuddy meansnthat Good hifi is not suitable enough for the pentas.
Are foam better.than rubber?
Is it possible to buy pretty new midrange drivers?
And some another question.
What is the best receiver to usewith the pentas.
Beocenter 9500 or beosystem 7000 or beocenter 2300/3000 og 3200
Someone who has tester the pentas with the beosound 9000 og beosund 4?
Will the choose of different receivers influence of the soundguality?
Andreasi995: Leslie prefer the Good hifi.
Did I?
Andreasi995: Beobuddy meansnthat Good hifi is not suitable enough for the pentas.
He never tried them but his explanation makes sense. To me they still sound pretty good (hifi)
Andreasi995:Are foam better than rubber?
I don't know, the originals are foam so better stick to that
Andreasi995: Is it possible to buy pretty new midrange drivers?
I bought 8 new drivers three years ago for approx. 300 euro. Not sure if they are still available
Andreasi995: Beocenter 9500 or beosystem 7000 or beocenter 2300/3000 og 3200
Andreasi995: Will the choose of different receivers influence of the soundguality?
In my experience, yes
I have here 10 rings from Good Hifi laying here.
I tried to start with refoaming, but already at the beginning I saw the shortage of the diameter which gives you only 1-1,5 milimeter for gluing on the outer ring. At the chassis of the speaker itself, there is a gap which gives you even less for gluing.
A moment later I saw that the inner ring doesn't fit properly at the conus, so I decided not to go further.
Okay, sell them to me if you find them useless (for a good price) You have my number!
Maybe it's just with me, but here why I won't use them.
First the diameter, which is to small.
Then you can see that the ring doesn't lay on the conus, you have to force/bend the ring to fit properly. That's causing the pre-tension.
And then there is the gap in the outer ring on the chassis.
Because of the less space for gluing, I am convinced that one day the ring will come loose from the chassis because of the vibrations of the conus and speaker itself.
Sorry for the bad quality of the picture.
And that's why I'm not convinced about the reliablity of these rings. Refoaming is fine, but not for me. Sorry.
I have had people/members over here for overhauling the penta. It costs them quite some money. Mostly for the (better) parts I use.
But with such an investment I simply can't suggest refoaming with these GH rings.
Are you using foam or rubber? Looks rubber to me seeing your pictures.
Link send to GoodHifi. Let's see what they have to say!
Again, if useless then give/sell them to me
They look like foam to me - I have the rubber ones, and they are darker and smoother (I've compared with a identical foam surround which was sent to me as a sample).
I've not had any problems with fitting the rubber surrounds on mine, and the inner edges bend down on the cone just fine once you get some glue on them. I agree with the point about the outer edges (That it wouldn't hurt, if they were a bit bigger), but the surrounds can be used, if you take your time to get the surrounds placed correctly on the cone so they have the same amount of space on each site of the outer edge and out to the basket.
- Dennis
Same experience Dennis, that's why if Beobuddy find them useless I surely can use them!
Re: Foam/Rubber, I did both types.
Foam from speaker friends.
Rubber from Good Hifi..
They will both work. I don´t think the rubber will get loose by time due to vibrations. As said earlier the foam where easier to work with, but also the foam rings could have been larger in the outer diameter. From a sound quality perspective the foam-ring would in theory sound better, since the less weight, and since that't what the whee originally equipped with. However I must say that it is absolutely impossible to hear any difference. In theory the rubber ring will last longer, but you never know until afterwards.
Regarding receiver: If you run active speakers i doesn't matter so much which receiver you use since the power amplifier is not used. Personally I'd say the BC 9500 is better built than the 2300 and much more good locking than the newer systems. I also offers two way communication.
Okay, more experiences from other users! Bo, what's the other suplliers name, "speaker or audiofriends"?
Sorry, Audiofriends it is. http://www.audiofriends.nl/
Did you do recapping of Penta 3's? If yes could you please give me more details where you bought them?
Just checked the values:
3x 68uF/100V
1x 22uF/100V
2x 8,2uF/100V
1x 27uF/100V