Sign in   |  Join   |  Help

Beovox M70... one more time.

rated by 0 users
Answered (Verified) This post has 1 verified answer | 58 Replies | 3 Followers

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member
Martynka posted on Sun, Oct 7 2018 11:29 PM

Hey,

Thread about M70 began here: https://forum.beoworld.org/forums/t/34886.aspx  . To not mix in threads I decided to put it here.

I bought my Beovox M70 , I did not expect much from the state though they played nice. After buying and the first hours in the house spent listening, I decided to look at them more. They are from one pair (matching serial numbers)

 

The boxes are not damaged :

Speakers and suspensions look good without abrasions, dents and holes in the paper:

The grilles are whole and not broken, although they have small abrasions on one:

and inside....

Crossovers - no repairs, no visible signs of damage, both the same:

SEAS woofers looks like new, with no problem with terminals:


The same with Peerless uniphase - without problem with magnets.

 

Now, after these few photos I have questions:

- whether recap is necessary in crossovers ??

- is there any canvas that was covered with grills M70 ?? I only have a new stretchy acoustic material, in Infinity it looked like the original but here it is different and I do not know what the final effect will be.

- whether the acoustic parameters of the box do not change after the insertion of modern cable terminals with latches or screws?

- how to mount the grills, now they are fastened with self-adhesive Velcro, but you can see it and it is not perfect ??

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

Answered (Verified) Verified Answer

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member
Verified by priklep

Thanks. 

In addition to the sound and appearance, there is one more important reason for the renovation.

M70 in the living room gave an unpleasant odor in the air. Confusion of the old basement with the composition of waste paper. Like a warehouse with old, damaged books.

To eliminate it, I had to replace the filling, vacuum the inside of the boxes, change the material for the grill, beeswax gave the whole a pleasant natural aroma.

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

All Replies

Saint Beogrowler
Top 150 Contributor
Saint Paul
719 Posts
OFFLINE
Gold Member
Crossover recap is a very good idea. How fancy of caps you use is up to you. I used middle of the road electrolytic and am happy, some have used larger fancy caps and been happy.

I always leave my B&O as original in design as possible so I wouldn’t add modern connections.

The fabric on my pair was destroyed and I used average black acoustic material and I have regretted that. There are many nice options for speakers available and something with less sheen and a more thicker textured weave would look nice. I don’t know how deep of a black the original material looked like from the factory, the cloth I used I think is too black.

Email Martin at Beoparts.com, he might have the original latch pins for sale.
priklep
Not Ranked
Slovakia
61 Posts
OFFLINE
Bronze Member

Hello,

very nice purchase. Ask Martin (Dillen here on forum) also for capacitor kit for this type, he will help you. Woody work (veneere) is well descrided here on beoworld, you will fond IT.

priklep
Not Ranked
Slovakia
61 Posts
OFFLINE
Bronze Member

Hello,

very nice purchase. Ask Martin (Dillen here on forum) also for capacitor kit for this type, he will help you. Woody work (veneere) is well descrided here on beoworld, you will fond IT.

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member

- I am thinking about installing terminals because I have good, thick cables and I have the impression that using DIN does not make sense for these cables.

- On the grilles, I found the Monacor fabric, black but with a thicker pattern.

- And finally capacitors:

Long ago I read an interesting article about using them in crossovers, after that I am a supporter of dry film capacitors, of course everywhere where it can be used because there is limited capacity.

The second thing is that recap is needed in environments exposed to high temperatures like amplifiers, for example.

These are the reasons why I am thinking about recap procedure.

This article is quite well written by Harbeth Audio owner and speakers constructor. If someone wanted to read the whole lecture, I can drop the link.

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

Beo_Jean
Top 200 Contributor
QC, Canada
284 Posts
OFFLINE
Bronze Member

I restored a pair of M70 not a long time ago.  There, you should find restoration tips you are looking for under the Workbench forum.

Looking carefully at one of your woofers, I can see that the red terminal is detached from the speaker housing on the second picture.

If I were you, I would still put all chances on my side and secure all terminals and glue the phase link drivers.

Good luck!

 

 

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member

No, the red terminal is not disconnected from the speaker housing. I opened the case and checked again.

However, I decided to change the way of connecting wires. In the garage, from the old Polish loudspeakers "Tonsil Samba 250" unscrew the terminals.

and in the place of the old DIN, I made a new hole.

everything is sealed with silicone, looks good and works as it should.

 

I wanted to start the fight with the appearance of veneers, but first I dismantled Beomaster and changed the thermal paste to the radiator, because the M70 turned off the Beosystem.

 

to be continued....

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member

Hmmm ... since the M70 stand in the living room, there is a smell of old age around. The smell was clearer when the housing was opened. I ordered wadding to replace the boxes filling , I hope the smell will disappear

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member

Filling replaced with new ones.

 

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member

Because listening to music while sitting on the carpet is uncomfortable, and because I do not have stands for the M70, I decided to do something about it.

So I bought 4 m steel profiles

I cut the profiles into pieces:

And I made myself stands. This is how raw it looks, after welding and grinding. Now I'm doing the second one and in the meantime I think how to finish them off.

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member

After 4 hours in the garage, both stands were ready for painting and assembly:

But then, I thought to create something original that would compose to the speakers and the room. The choice fell on brown leather.

And after another 6 hours with a needle in my hand... I made this :

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member
Martynka replied on Fri, Oct 26 2018 12:35 AM

Following the blog ...

Today I received a package with fabric on the grill and pins:

The fabric looks pretty good with the texture at the original.

 

I removed the old one and put a new material:

 

Even though it's a bit darker it looks really good:

 

I also installed the pins for the grill assembly:

 

Tomorrow I will polish wood and aluminum. I paint the front under the grill with black paint.

 

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member

This is the last day of work, then just listen and listen and listen ...

To clean the rosewood I used the 3M Scotch Brite Scouring Pad on a random orbital sander. Any unevenness and discoloration have been removed.

 

After all, I put several layers of beeswax on the prepared veneer.

 

The aluminum frame was polished, and the fronts under the mask were painted black.

And here is the end result:

I am really proud of them, now they not only sound wonderful but also look great.

 

By the way ... I do not know how it is in the original but in my stands I made adjusting the inclination on the screw.

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

lawrencejmcook
Top 500 Contributor
184 Posts
OFFLINE
Founder
Beautiful result! You must be very proud of your handiwork 😊
Martynka
Top 500 Contributor
109 Posts
OFFLINE
Bronze Member
Verified by priklep

Thanks. 

In addition to the sound and appearance, there is one more important reason for the renovation.

M70 in the living room gave an unpleasant odor in the air. Confusion of the old basement with the composition of waste paper. Like a warehouse with old, damaged books.

To eliminate it, I had to replace the filling, vacuum the inside of the boxes, change the material for the grill, beeswax gave the whole a pleasant natural aroma.

Beosystem 5000 - (Beomaster 5000, Beocord 5000, Beogram 5000, Beogram CD50, Master Control Panel 5000, Terminal 5000 Remote Controller), Beovox M70, Beogram 5500, Beogram 5005, Beogram 8002, MMC1 - fully refubrished with nude Shibata, MMC2, MMC4 - newly retipped with elliptical,  MMC4 - newly retipped with nude Fine Line, Beosystem 5500 - (Beomaster 5500, Beocord 5500, Beogram 5500, Beogram CD5500, Master Control Panel 5500, Beolink 1000)

Page 1 of 4 (59 items) 1 2 3 4 Next > | RSS
Beoworld Security Certificate

SSL