My another one vintage speakers - Beovox 5702

[Martynka]

I finished grill fabric cloth:

 

[Oldsansui441]

The new cloth looks great.

 

[Ohighway]

Wow. Those are serious looking speakers. Keep up the good work with the restoration !

 

[Martynka]

Now is time for woofers technical specification.
In Beovox 5700/5702 were two types of woofers: Philips AD10100 and Philips AD1056. I knew that difference is in magnet, AD10100 is FXD300 (ceramic) and AD1056 is Ticonal (alnico) but I couldn't find the AD1056 technical specification... till now.

First AD10100:

and AD1056

I see difference in resonance frequency 25Hz (10100) vs 20Hz (1056) and frequency range 35Hz - 800Hz (10100) vs 18Hz - 1000Hz (1056)... and now question: What does it means for me ?? Maybe nothing ??

 

[swechsler]

The latter woofer would be capable of reproducing lower bass notes, but it's not like you can just swap one out for the other, since the passive radiator is different.

 

[Martynka]

The latter woofer would be capable of reproducing lower bass notes.

You mean this older AD1056 with 20Hz resonance and 18 - 1000 Hz range. I think that this woofer was always in 5702 ( but maybe 10100 too).

In 5700 was AD1056 and AD10100 depending on the series with the same passive radiator.

 

[swechsler]

Yes, a lower resonant frequency usually translates into lower bass capability. Are you looking to modify something or are you just curious?

 

[Martynka]

I'm very curious, and I want to understand how big difference was between the same speaker depends on uses different elements. Some says that bass is very pure, some says that is impressive. For me is much more that in my KEF104aB but in some Beovox 5700 you don't hear low frequencies.

 

[A400]

This interests me too. I have three AD1056 and one AD10100, all with rotted dust caps. The mismatched pair came to me as bare woofers so I don't know their history. However, I have read (on MBFreaks site I think, or some European site) that AD10100 was the replacement for AD1056 and intended as a direct replacement. From memory it was stated that they sound very similar and sometimes one of each be found in a pair of speakers.

 

[Martynka]

I read on the Dutch website that AD1056 is the direct successor of AD1055 and 10100 due to the ceramic magnet sounds different.

you can compare sound characteristic, it is almost the same

 

[Martynka]

Because I will order crossovers capacitors I have a question about "tropical fishes". I read opinion that "Mullard polyester caps are some of the most
reliable components on this planet" and no need to replace it.

More opinion on it please.

 

[Oldsansui441]

I only replaced the e caps in my pair, the general consensus over at beoworld is that the films do not need to be replaced. The top end in mine is still very detailed.

 

[Drugolf]

Thanks for posting about these Martynka. I really like the look and style of these. Maybe some will come along around here some day.

 

[Martynka]

Thanks, I finished wooden work in garage. After half hour I bring Beovox back to home and show few photo from work.

 

[Martynka]

There was a thick layer of varnish on the top of the boxes.

One of the previous owners apply varnish to hide the scratches. These white marks on top after sanding, are an old putty and new problem for me.

and time to put first layer of oil.

half an hour later I wiped the surface with oil and here's the effect.

tomorrow I will apply second layer of oil and I will try resolve problem with white marks because it still stays on top after oiling.

 

[Martynka]

I wrote about problem with white putty. After oiling white marks were "whiter". It was ceramic or synthetic putty without the possibility of coloring.

It was only one way - removed it

and apply new putty

today I will try to sanding it one more time.

 

[Martynka]

I almost finish boxes, but now question about crossovers.

This is scheme of Beovox 5700 crossover.

In Beovox 5702 I have a different:

In the woofer section instead of 100uF (2 x 50uF) I have 75uF
In the mid tone section instead of 3.3uF and 12uF I have 1uF tropical fish, one 2.2uF tropical fish and 20uF
In the hi tone section instead of 2uF (2 x 1uF tropical fish) and 5uF I have 1uF tropical fish, one 2.2uF tropical fish and one 8uF

In both speakers are the same drivers only different ABR. Why crossovers are so diferent ??I understand that this may be a different subwoofer section because a different ABR, but why different rest?

And what this difference changed ?? different frequency range in each section ??

I think these two speakers may sound a little different... or not ??

 

[Oldsansui441]

Hi, my 5700's also had three electrolytic caps, one 75uF, one 20uF and one 8uF as you describe in yours.

 

[Martynka]

oooo... @Oldsansui441, you have AD1056 to??

My friend yesterday pick up 5700, later series I think ( veneer looks like in my M70, my looks like in older 5000 ), he has alnico and this second crossover with two 50uF in woofer.

I want to go to him with my Beolab and 5702 to compare it.

 

[Oldsansui441]

Yes, mine have the Philips AD-1056's. Interesting about your friends 5700 version, mine are type 6229 if that helps?

There is no reference to the crossover version anywhere online that we both apparently have.