B&O Penta repair midrange with foam or rubber surrounds in a perfect way.
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- เผยแพร่เมื่อ 22 ส.ค. 2024
- The foam surrounds of Bang & Olufsen Beovox / Beolab Penta midranges get after a while decayed. We have a simple solution to repair these speakers with a small amount of tools. P.S. Always stick/push the surround on the cone or frame first time crosswise till it's firmly attached.
We also have the very flexible specially designed rubber version for these B&O Penta speakers. The specially for Penta designed rubber surround is the 3"AF-69 and can be found here: • B&O Penta repaired fro... .
Note: we used methylated spirits, but alcohol from the pharmacy or IPA alcohol is also excellent.
![Bang & Olufsen Beolab Penta vs Beolab 3000 Sound Test - which one should YOU buy? [4K]](http://i.ytimg.com/vi/OuMEpmDrx_k/mqdefault.jpg)
great illlustration for the repair which many speakers from that age need and deserve - thanks!
Thanks for your positive reply :-) !
Just ordered a set, I can't wait :D
Thanks.
Do you also sell ferro fluid for the tweeters? I removed one of my Penta's tweeters to search the model number and take measurements, but i noticed a weird brown stain on the tweeter's sticker. So i took the tweeter apart and found out that they are in fact ferro fluid tweeters. Is this a well-known thing?
Good morning, sorry for the late reply. Actually I don’t know if the ferrofluid is in the tweeters of all Penta series, but it wouldn’t surprise me. The surprise is because Audiofriends doesn’t sell ferrofluid. This is because of different reasons. One is that the viscosity of the ferrofluid original often differs between different types of tweeters.
Further, as far as I know, good ferrofluid that lasts long, is rather expensive, and I assume not sold, but only used by professionals. Also it’s hard to get the right volume of ferrofluid back. Good ferrofluid may differ some from the original one, but lasts longer. Otherwise using of ‘standard sold ferrofluid’ is often maybe not the best solution, but it is the only solution. With best regards, Fred
Comments are welcome! You can buy these surrounds (also as set with glue and brushes) at www.repairyourspeakers.com.
Hi, thank you for the video, is the best guide I had seen, one question, the glue T7000 (black for example) is good to paste a midrange penta? And rubber is better than foam ? Thank you.
Good evening,
Thanks for your reply. Sorry, I never used this T-7000 glue. However it seems to be flexible after drying. How flexible? No idea what it really will do after drying. Use is all at own risk.
www.google.com/search?q=glue+t7000&sxsrf=ALeKk026y0oI5MzTtM77KAPIYoTrmRklVA%3A1623266599512&ei=JxXBYPrLHpHJgwf99I_wBQ&oq=glue+t7000&gs_lcp=Cgdnd3Mtd2l6EAxQAFgAYO67B2gAcAJ4AIABRYgBRZIBATGYAQCqAQdnd3Mtd2l6wAEB&sclient=gws-wiz&ved=0ahUKEwi6-6eoo4vxAhWR5OAKHX36A14Q4dUDCBE
About rubber or foam, please see the following hyperlink: www.repairyourspeakers.com/en/video-manuals-for-repair/foam-or-rubber-surrounds/c-27.
With best regards, Fred
Hello, good afternoon. Thank you for your videos, I use makes tiempo.cuando got me these speakers.
I repair the midranges. Everything is fine. but one of his amplifiers did not sonido.y me, bring it to repair. This only cost 20 euros... too cheap...
but after a while, I've noticed that sounds middle, and treble of this altavos just hear. (compared to the other speaker)
that may be echo them to leave them so?
they have placed a few different from the original crossovers?
If I find these original crossover problem is fix?. Thanks a lot.
Good morning,
Sorry, but my knowledge doesn’t go that far. At forum.beoworld.org/forums there are a lot of specialists. If you use the search word ‘Penta’ you wil go to this page which also has a lot of answers: forum.beoworld.org/search/SearchResults.aspx?q=Penta&o=Relevance. If you can’t find the specific answer to the electronic problem, you might as well open a topic. You then have to click the button ‘join’ on the right above the page. The forum is in different languages, but English is the most common used language, with the most technical people who are willing to help you.
Best regards, Fred
@@audiofriends254 thanks. Regards
@@ypsofacto82 Good morning, thanks for your reply :-) ! Best regards, Fred
@@ypsofacto82 Good morning, thanks for your reply :-) ! Best regards, Fred
Hello i have just bought the rubber surrounds from you guys for my new penta speakers, is the process the same for the rubber as the foam, as showed ind the video? :)
Good afternoon,
That’s correct. The only thing is that the drying of the glue will take some longer, especially on the frame, because the rubber surround and the plastic frame are both airtight. Please take patience to let them dry for 24 hours before playing. There is just a small film of glue between the frame and the rubber surround, so at normal use of the glue it should be enough.
Best regards, Fred
@@audiofriends254 Thank you so much for the fast answer and all the great toturial videos. I will let them dry for 24 hours :D
How are you making sure they are properly centered?
Hello dear, do you repair penta mk2 display unit?
Good morning, thanks for your reply. I'm sorry, Audiofriends doesn't repair audio. If I'm right there is a large B&O forum on internet with lots of specialist. If I'm correct it's www.beoworld.com or .org. Best regards, Fred.
It's forum.beoworld.org/
hallo, how long does it take more or less per midrange?
Hi I have b&o penta MK2, Please what are the dimensions of Foam surround for medium speaker
Thank you 🙏
Good evening, thanks for your reply. The sizes can be found on the following link: www.repairyourspeakers.com/en/surrounds-by-size/2-4-inch/3-pen-x-foam-surround-for-repair-speaker/a-2524-10000068. Wit best regards, Fred
@@audiofriends254 Thank you my friend, more success in your field
So
How are these midrange drivers in the Penta removed to do the refoaming ? Does not appear they are face mounted ?
Good morning,
Thanks for your reply. You have a good question. Fred + Google translation:
This question actually embarrasses me a bit, because I could have put the dismantling and mounting of the midrange speakers on video. On the next link you can see the screws on the front of the panel where the midrange speakers are mounted: th-cam.com/video/P3rd3NTQ-iM/w-d-xo.html. You must disassemble these screws.
If you remove the panel with four midrange speakers, you will see that on the back of the panel the midrange speakers are mounted each with three screws and brackets.
Furthermore, a lot of cabling to the midrange units. It is important to mark this cabling with, for example, a piece of tape with a number written on it, with a waterproof pen or marker. Write the corresponding number below on the magnet of the relevant midrange speaker, above the + and - connections.
Then desolder and disassemble the units. After revision with new surrounds it is the reverse order.
Kind regards, Fred
@@audiofriends254 Thanks Fred. Successfully removed. After replacing the foam, what are you using to replace the broken brittle gaskets between the baffle and speaker. Im considering a foam tape sold for the purpose. It is 1/8" thick but it is 3/8" wide. Maybe cut it down the middle ?
@@kiwiaudio8462 Thanks for your reply. Actually we have made these gaskets between baffle and speaker especially for the B&O Penta: www.repairyourspeakers.com/en/foam-surrounds/bang-olufsen/foam-gaskets-for-3-bang-olufsen-penta-midrange/a-2684-10000016. I'll right away place a note at the offers of surrounds etc. for the B&O Penta on our webshop, because they are now a kind of hidden. If you send me a PM at info@audiofriends.nl, I can make a deal. Best regards, Fred
@@audiofriends254 sent you an email Fred.
So what are the sealing rings you guys sell used for
Good morning, thanks for your question. The sealings are for between the back of the frame of the midrange and the baffle. Original also from high density foam, and needs often replacement: www.repairyourspeakers.com/en/foam-rubber-surrounds/bang-olufsen/bang-olufsen-penta-midrange-8x-foam-gasket-ring/a-2684-10000016. Best regards, Fred.
Good afternoon, good question. After all, people usually think that it is always not to cause false air, an air leak so to speak. That is possible with woofers, and in particular with woofers in closed cabinets. Some manufacturers also glue a woofer, I don't find that useful, after all, you can no longer reach the exchange filter. Anyway, now why a foam gasket is almost always used, both with woofers, midrange, tweeters, etc.
With the Bose 901 (indeed, something completely different again) the sealing ring of the last loose speakers was already glued to the speaker frame as standard. Now why the Penta's 3 inch midrange speakers need a sealing ring. Especially with very powerful midrange speakers, vibrations can occur between the frame of the midrange and the front.
It is therefore useful to tighten the speakers crosswise as much as possible. Testing with, for example, a program for test signals on the mobile phone is quite sensible. With the sealing ring it is not possible that there are still audible vibrations between the frame of the midrange and the front. Finally, it is a small operation with relatively inexpensive parts, also original in mass production. Kind regards, Fred
i read on the specs that the woofers are 8cm. would 3inch surrounds be appropriate for this woofer for the b&o 6603 penta?
Good morning, Sorry for the late reply. The Penta midrange units are sometimes from different trades, but have all the same sizes. The sizes of the now 3"PEN-X2 can be seen on the following link: www.repairyourspeakers.com/en/surrounds-by-size/2-4-inch/3-pen-x2-foam-surround-for-repair-speaker/a-2524-10000068. If you want a perfect sound with lifetime rubber surrounds, this video may be interesting: th-cam.com/video/1cA2I-uawFw/w-d-xo.html. Best regards, Fred
I cut my finger.
We also have the very flexible specially designed rubber version for these B&O speakers. The rubber surround is the 3”AF-69 and can be found here: www.repairyourspeakers.com/en/search?query=3inchAF-69.
what is the blue liquid at 2:35?
thank you
Good morning, sorry for the late reply and thanks for the tip. I've just added in the text below the video how and what about the blue liquid: The blue liquid is methylated spirits (kind of alcohol with blue colour). At this moment IPA (colourless kind of alcohol / Isopropyl Alcohol) is a better advice. Best regards, fred