B&O Kit Worth Restoring or Selling

[dantheman91]

Hello Guys

I bought a job lot of B&O items to 2 sets of speakers 1 pair dead "giving them away" the others need re foaming CX 50's the receiver is a Beomaster 1700 which is currently dead.:( ive also got a Beogram 8000 this one has power but has a snapped stylus and needs total restoration as in terrible state literally shocking but they have a good market value in nice & working order the question is are these items worth restoring? gorgeous looking items but do i need deep pockets for this? Do they have a good market as spares or repair possibly the best option at present i can get the foam for the CX 50's i might even attempt to do them myself :D:eek:

Any thoughts wondering to add to the collection or sell im stuck in the middle but i dont really want stuff about i cant use.

Thanks
Daniel

[Macca]

The TT looks interesting:

The Beogram 8000 used a new system called “Tangential Drive”, a form of direct drive that used “linear motor” technology to give smooth, silent and controllable power to the turntable. In simple terms, the motor coils placed a magnetic field at a tangent to a metal drum under the platter. This had the effect of pulling the drum through the coils in a manner that was smooth and free of “cogging” and “stepping” effects. This layout was at odds white the techniques used in the typical Japanese direct drive turntable, which tended to use hall-effect motors based around rotating magnetic discs and multiple electronically-commutated coils in an arrangement that was fundamentally not “stepless”.

[dantheman91]

Hi Guys

Decided to sell the rest

Im going to get the CX 50's done/restored as i have tested them and their both working i have taken all the rotted surround off and got the all of the goo from the speaker chassis and cone i can the question is can i re foam them myself is it a case of taking the drivers out placing the foam around the cone and gluing them? This to me looks quite simple but can i have some advice if not.? i have attached a couple of pictures and wondering are they good to be done?

Or maybe not looking here....:rolleyes: http://www.audiofriends.nl/pdf/refoaming.pdf

Might be best to send them off to get them done....

Thanks
Daniel

[dantheman91]

Anyone.........??

[spm]

I refoamed some JBL Control 5 and found it a fairly simple process. I read a few threads and watched a couple of youtube videos. The speakers sounded good after but to be honest I hadn't heard the Control 5 before so I can't say whether they were as good as new.

[Beobloke]

The CX50s are cute and work quite well but aren't the greatest speakers in the world. However they're not the easiest to start to practice re-foaming on as a 3.5" unit doesn't have a lot of leeway for mistakes. Doing an 8 inch driver or larger is a lot easier! If you do go for it, don't forget to cut the dust cap off and shim the voice coil for best results.

As to the rest of the stuff, the Beogram 8000 is the real jewel - one of B&O's best turntables. They are complex beasts, though, and replacement cartridges aren't cheap but they really are very good. I have the later 8002, which took the MMCx series of cartridges rather than the MMC20x types and it is a superb turntable. Each time I listen to it I find myself wondering why I bother with more complicated, bigger and fiddler methods of vinyl replay!

[dantheman91]

The CX50s are cute and work quite well but aren't the greatest speakers in the world. However they're not the easiest to start to practice re-foaming on as a 3.5" unit doesn't have a lot of leeway for mistakes. Doing an 8 inch driver or larger is a lot easier! If you do go for it, don't forget to cut the dust cap off and shim the voice coil for best results.

As to the rest of the stuff, the Beogram 8000 is the real jewel - one of B&O's best turntables. They are complex beasts, though, and replacement cartridges aren't cheap but they really are very good. I have the later 8002, which took the MMCx series of cartridges rather than the MMC20x types and it is a superb turntable. Each time I listen to it I find myself wondering why I bother with more complicated, bigger and fiddler methods of vinyl replay!

Hi Adam

Do you have any advice on the re foaming process i would like to give it a go....? no worries if not....

Thanks
Daniel

[Beobloke]

Measure the old surrounds carefully and buy the new ones that are as close as possible to the old ones and dust caps that are slightly bigger. You'll also need to buy some glue (PVA is fine) and some material to shim the voice coil - when I started out repairing speakers I used to buy a kit from a place in the USA that included surrounds, dust caps, glue and shims but I can't remember who they were! Now I generally buy my surrounds and dust caps from Good Hi-Fi in the Netherlands - http://speakerrepairshop.nl/index.php?action=home&lang=EN

The basic steps are as follows:

(1) Remove all the old surround from the cone and chassis, then carefully cut off the old dust cap as close to its outer edge as you can (being careful not to cut any voice coil wires under it!). Fit the shims to hold the voice coil central and in the normal height that is determined by the suspension - make sure the coil isn't pulled up or pushed down from its natural rest position.
(2) Apply a bead of PVA to the cone, leave for 10 minutes and then stick the surround to it, centring it by eye. Once it's stuck, leave to dry overnight.
(3) Apply a bead of PVA to the chassis, leave for 10 minutes and then stick the surround to it, allowing it to find its natural position such that the roll surround is even when viewed from the side. Once it's stuck, leave to dry overnight.
(4) Remove the shims, apply a bead of PVA for the dustcap and apply it to the cone. Leave to dry overnight and a small weight sat on it will help maintain pressure whilst it dries.
(5) Re-fit speakers and enjoy!

Note that you do not need a thick bead of PVA as it will squash out once the items are stuck together. By all means use a quicker-setting glue if you prefer but remember this will be less forgiving in terms of precise positioning.

Good luck!

[struth]

Parts express used to do foam kits in states

[walpurgis]

Make sure the inner edge of the surround matches the cone edge profile. Some cones have turned down edges and will not work with regular cone surrounds.