RL 140 speaker crossovers

greetings 😁

would someone be able to shed some light on the RL 140 crossover caps ?

my crossover board has the following caps fitted:

33uF/100V, 15uF/100V, 6.8uF/ 100V, 10u/63V and 3.3uF/35V

in opposition to what the SM states ! 🤔🤔

has this board been upgraded/changed at some stage ??

grateful for your advice 🤓

thanks ALF

What you listed is what I have in my RL140 except my 3.3uf is 100v.

Sorry, made a mistake here ....my 3.3uF is 100V as well !

that tells me some spec has been changed in the past as it contradicts the parts list for the crossover in the SM !

 all are gold/brass coloured caps.

they tested ok, so would I still gain anything in upgrading the crossover caps with better more expensive types ???

any suggestions, comments ??

ALF

Hello,

I am a new member here, after lurking and searching a bit regarding recapping my RL 140s.  I am looking for a little helpful advise.  I realize this is an old post, but it saves some effort because it answers some of the questions I initially had.

On another site I downloaded a schematic and parts list, but it isto blurry to read on my laptop or printed.  I have located where I can purchase the capacitors Alf listed, but I don't know enough to know whether I need non-polarized or not.  Until now, my tinkering and technical activities have been limited to home renovation and keeping my 33 year old Mercedes turbo diesel on the road as a daily driver.

I have read on another thread(s) that Dillen/Martin did not think there was any value to going for the new foil capacitors, and it seems they are larger, possibly creating positioning issues.  Other threads seemed to suggest that recapping kits for my speakers might be available somewhere, though I haven't found any with dogged googling.

I am confident enough of my soldering abilities (I will practice up first of course) and exchanging old with new if I have the replacements in hand, but I am not confident at all that I will know what exactly it is I should buy. even with Alf's list.

I thought my system sounded pretty good to begin with.  I refoamed the speakers and they were better.  Then I replaced the old MMC4 cartridge on my RX2 turntable with a new upgraded soundsmith cartridge and wow.  Then I added used stereo REL T5 subwoofers and wow again.  It got me to thinking that replacing my 25 to 30 year old capacitors might also add a notch,

stereo B&K pre and power amps if anyone is curious.

I am hoping someone can point me to the correct type of capacitors to buy and where to get them.  I found some electrolytic non polarized capacitors at one website (not sure if it is appropriate to name it here) for about a dollar apiece.  That price gives me pause.  Or are they really that cheap?

Thanks,

Steve

 

I open up my speakers and take note of what's is actually installed and then order. Speaker crossover caps here are bipolar.

Ordering a kit is easiest, email this guy https://beoparts.com to see if he has a kit.

Or search for a seller of speaker capacitors like parts-express.

I'd go electrolytic too.

Hello Steve,

welcome - a great place to discuss, find solutions and advice about B&O products.

hearing is a great deal a very personal exprience. 

Yes, you are right with the non- polar capacitors. Changing the existing ones for $1 caps achieves very little if anything

unless the old ones are way out of spec.

if you are happy with the sound  -after checking the ones from your coss-over boards to make sure they have not lost their spec-

you can  decide to play with replacing them with more expensive ones - I spent about $80 and I am very happy with the “new” sound.

Check the physical dimensions of the one you want  to replace first - no point in wasting money on caps that won’t fit !

then make a choice but you do not need to go overboard in $$$ terms. 

I have chosen Mundorf capacitors......very happy with my choice and don’t regret spending the money at all.

good luck 🤗

ALF

 

Thanks for the advice Alf and Beogrowler.  I have contacted  Beoparts.  I thought of opening up the speakers, but thought I might not be able to read what is in there without removing them because of glue, corrosion, orientation etc, or not understand whatever is printed on the capacitors.

Maybe lazy, I know, but I am in the midst of retiling a bathroom and shower.

 

Steve

Thanks for the advice Alf and Beogrowler.  I have contacted  Beoparts.  I thought of opening up the speakers, but thought I might not be able to read what is in there without removing them because of glue, corrosion, orientation etc, or not understand whatever is printed on the capacitors.

Maybe lazy, I know, but I am in the midst of retiling a bathroom and shower.

 

Steve