TL Mod & The SDA-2B's, GREEN LIGHT!

inspiredsports

I need to clarify something here as I thought I remember reading audiocr381ve's 2B's are blade/blade (meaning 1987)

Both 1987 models (pin/blade and blade/blade) used the The RDE050A polyswitch which has a resistance range of 0.50 to 0.77 ohms.

The 1989 SDA 2B uses the RDE090A which has a lower range of .01 to .12 ohms.

audiocr381ve

inspiredsports wrote: »

I need to clarify something here as I thought I remember reading audiocr381ve's 2B's are blade/blade (meaning 1987)

Both 1987 models (pin/blade and blade/blade) used the The RDE050A polyswitch which has a resistance range of 0.50 to 0.77 ohms.

The 1989 SDA 2B uses the RDE090A which has a lower range of .01 to .12 ohms.

Hey Inspired, awesome info as well. Mine are the pin/blade 2B's. Will definitely keep this info in mind when making the order.

inspiredsports

audiocr381ve wrote: »

Hey Inspired, awesome info as well. Mine are the pin/blade 2B's. Will definitely keep this info in mind when making the order.

Pin/blade could be either 1987 or 1989, meaning either one of the poly switches.

We are splitting hairs, but a .5 ohm resistor is the best match when replacing 1987 RDE050A poly switches.

If you have 1989's with RDE090A poly switches, I would simply bypass and wouldn't bother replacing with a tiny value .1 or .2 ohm resistors.

Joe08867

inspiredsports wrote: »

Pin/blade could be either 1987 or 1989, meaning either one of the poly switches.

We are splitting hairs, but a .5 ohm resistor is the best match when replacing 1987 RDE050A poly switches.

If you have 1989's with RDE090A poly switches, I would simply bypass and wouldn't bother replacing with a tiny value .1 or .2 ohm resistors.

I have a similar year and just bypassed it. Seriously don't fret over .1-.12 you will never hear a difference between nothing and .1 in the crossover. That doesn't even cover the tolerance discrepancy of the original caps.

audiocr381ve

inspiredsports wrote: »

Pin/blade could be either 1987 or 1989, meaning either one of the poly switches.

We are splitting hairs, but a .5 ohm resistor is the best match when replacing 1987 RDE050A poly switches.

If you have 1989's with RDE090A poly switches, I would simply bypass and wouldn't bother replacing with a tiny value .1 or .2 ohm resistors.

Awesome. I'll let you know what it looks like when I open em' up.

BTW, I just picked up two RDO-198-1 tweeters

audiocr381ve

chandler9a wrote: »

this sounds great audiocr381ve. Keep us posted, I have been pondering how to do my SDA 2A's for a while now. not very easy for those of us who have never done it but a good challenge non the less.

I would personally do it all at once and do it right, even if it took longer.

Good luck!

Thanks Chandler! I got your PM by the way. I'll hit you back later today.

audiocr381ve

Although you'd never be able to tell because they are unmarked, here are some pictures of my RD0-198's (and my beloved Marantz 2245) that I picked up yesterday.

audiocr381ve

Okay guys, I've made a few decisions.

I'm going to go with Mills for all resistors, Sonicap Gen I for the highs, and cheaper caps for the rest of the upgrade (Clarity Caps?).

Can anyone give me some suggestions on cheaper caps for the rest of the build?

UPDATE:
This is the order I put in with Sonicap

Capacitors
Two 5.8uF Gen I
Two 12uF Gen I

Resistors - Mills MRA-12
Two 0.5 Ohm (If not available, 0.1 Ohm will do)
Two 2.7 Ohm

SAILSOCKANOSY

cute! thank you.



באבל טראבל 2משחקי בנות סופר מריו

audiocr381ve

SPAMMER!

Where do these guys come from? Why do they post?

Reported.

heiney9

audiocr381ve wrote: »

Okay guys, I've made a few decisions.

I'm going to go with Mills for all resistors, Sonicap Gen I for the highs, and cheaper caps for the rest of the upgrade (Clarity Caps?).

Can anyone give me some suggestions on cheaper caps for the rest of the build?

Solen

Axon

Clarity Cap PX

I've use all 3 with the Solen and Axon in the low pass and actually the Clarity PX in the high pass and they are all solid performers and budget friendly.

H9

audiocr381ve

H9, of the three which did you prefer for the low pass?

Is Madisound the place to order these? I don't know if it matters, but I'm in Southern California.

heiney9

audiocr381ve wrote: »

H9, of the three which did you prefer for the low pass?

Is Madisound the place to order these? I don't know if it matters, but I'm in Southern California.

They are all so similar it really makes no difference in that position of the x-over. I'd go with wherever you can get them cheaper as far as unit cost and shipping, etc. I can't remember, but Clarity was coming out with 250v versions of some of their caps and they are smaller, which is a good thing.

H9

inspiredsports

audiocr381ve wrote: »

SPAMMER!

Where do these guys come from? Why do they post?

Reported.

Because they are retards! :biggrin:


Post 40 SAILSOCKANOSY reported as spam for removal

audiocr381ve

heiney9 wrote: »

They are all so similar it really makes no difference in that position of the x-over. I'd go with wherever you can get them cheaper as far as unit cost and shipping, etc. I can't remember, but Clarity was coming out with 250v versions of some of their caps and they are smaller, which is a good thing.

H9

As I'm poking around trying to find different distributors, I found Solen's at partsconnexion.com. They have different lines, with different materials used, as you know. Which ones am I looking for?

These are the options from the drop down menu:

PB Series Metalized Polypropylene Cap
Fastcap: PPE, PPM & PESG Series, Metalized Polypropylene Cap
Fastcap: SA, SB, SE, SM, SN, SY Series Polypropylene Film & Tin Foil Cap
Fastcap: 3Q Metalized Teflon Series FEP Cap
Fastcap: S3Q, S3ZQ Series Teflon FEP Film & Tin Foil Cap

I guess I'm looking for the obvious, which is the massive price difference between the lines but some confirmation would be nice.

heiney9

Wow, you are really over thinking this aren't you? :biggrin:

PB series, if you look the rest don't really come in larger sizes.

Partconnexion is out of Canada shipping and wait time can be an issue.

Parts Express carries Solen I'd get them from there rather than PC.

H9

heiney9

Looks like they are selling Axon caps for 50% off at Part Connexion........seems like a no-brainer to me. I'd go with those despite longer ship times and perhaps a tad higher shipping charge.

H9

P.s. If they stock the values you need.

audiocr381ve

heiney9 wrote: »

Wow, you are really over thinking this aren't you? :biggrin:

PB series, if you look the rest don't really come in larger sizes.

Partconnexion is out of Canada shipping and wait time can be an issue.

Parts Express carries Solen I'd get them from there rather than PC.

H9

Why do people keep saying that?! It's making me think that I might actually be out of it :eek::eek::eek:

I am a super uber noob when it comes to this stuff. I'm not going to know if one place has one size or not, or if one place sells only a handful of each line.

Wow, I guess I am over thinking this :redface:

Thanks for the help though H9. My Sonicap order is being shipped out today. I also added Cardas solder to that order.

Edit:

I see the Solens on partsexpress. Should I go with 6 x 20uF caps? They only have a 39uF and not 40uF.

heiney9

Yeah, we're busting your balls a bit........don;t be afraid to ask questions, that's how you learn.

audiocr381ve

Awesome, is this correct?

Buy six of these?

http://www.partsconnexion.com/cgi-bin/sc/order.cgi?rd=1&storeid=*20b7b6534d0a875b77f1157d6bb78332a868&sbid=SSMSB1304963423.21508&prevlocation=http://www.partsconnexion.com/capacitor_film_axon.html

audiocr381ve

heiney9 wrote: »

Yeah, we're busting your balls a bit........don;t be afraid to ask questions, that's how you learn.

Hah, good to know.

heiney9

audiocr381ve wrote: »

Awesome, is this correct?

Buy six of these?

http://www.partsconnexion.com/cgi-bin/sc/order.cgi?rd=1&storeid=*20b7b6534d0a875b77f1157d6bb78332a868&sbid=SSMSB1304963423.21508&prevlocation=http://www.partsconnexion.com/capacitor_film_axon.html

If that's the value you need, then yes. I have Axon's on the low pass of my 1C's. I believe that's cheaper than Solen or Clarity and they are nice caps. Made on the same production line as Solen.

Partsconnexion is great, just be aware some shipping times are longer and sometimes shipping cost a little higher. But looks like a great deal.

H9

audiocr381ve

heiney9 wrote: »

If that's the value you need, then yes. I have Axon's on the low pass of my 1C's. I believe that's cheaper than Solen or Clarity and they are nice caps. Made on the same production line as Solen.

Partsconnexion is great, just be aware some shipping times are longer and sometimes shipping cost a little higher. But looks like a great deal.

H9

Just put an order in for 6

These aren't a real popular cap are they? What do you mean same production line? Same company? :redface:

pitdogg2

Audior381ve,
I also used the Axon in my case 2x90uf + 82uf for my 260uf on my SDA2a's. With any luck yours will come with longer leads on the ends. Mine with the cap being so large I barely had enough to twist all 3 together but in the end it all worked out.
Good luck you are on the right path just take your time and mark everything so as to not get confused. Also one little reminder do only one side at a time and take pictures before you start it may just save you. It gets a little tight on the board.

heiney9

Straight from Parts Connexion website.

These are the capacitors chosen by some of the most highly regarded speaker manufactures around the world. The sound quality is very neutral and open. AXON True Capacitors are made from the finest grade European metalized polypropylene, by the same OEM company in France (SCR), that makes the SOLEN Metalized polypropylene caps. In fact, these are functionally and materially identical to the PA series SOLEN caps, with one advantage - typically, the "actual/measured" AXON values are more closely wound to the nominal printed value.

AXON True Caps are manufactured on high precision Swiss machines with high winding tension to suppress microphonics. They use a multi-wrap encapsulation (white epoxy ends) for protection and oven annealing to improve internal damping. Tolerance is 5% precision, centered on the nominal value. The leads are solid copper, coated with pure tin to prevent oxidation.

I don't know what you mean by not popular. Unless you follow multiple DIY sites you'll never know what's popular. You can't go by just the few x-over modding junkies on this site. Everything I've read points to them being solid caps for the budget minded.

Dayton
Solen
Sonicap
Clarity

Get most of the press here on our small slice of the DIY world but that probably because more sites carry those brands and Sonicap is a board favorite.........for good reason.

H9

audiocr381ve

heiney9 wrote: »

Straight from Parts Connexion website.

These are the capacitors chosen by some of the most highly regarded speaker manufactures around the world. The sound quality is very neutral and open. AXON True Capacitors are made from the finest grade European metalized polypropylene, by the same OEM company in France (SCR), that makes the SOLEN Metalized polypropylene caps. In fact, these are functionally and materially identical to the PA series SOLEN caps, with one advantage - typically, the "actual/measured" AXON values are more closely wound to the nominal printed value.

AXON True Caps are manufactured on high precision Swiss machines with high winding tension to suppress microphonics. They use a multi-wrap encapsulation (white epoxy ends) for protection and oven annealing to improve internal damping. Tolerance is 5% precision, centered on the nominal value. The leads are solid copper, coated with pure tin to prevent oxidation.

I don't know what you mean by not popular. Unless you follow multiple DIY sites you'll never know what's popular. You can't go by just the few x-over modding junkies on this site. Everything I've read points to them being solid caps for the budget minded.

Dayton
Solen
Sonicap
Clarity

Get most of the press here on our small slice of the DIY world but that probably because more sites carry those brands and Sonicap is a board favorite.........for good reason.

H9

Completely understood. Great info.

heiney9

Have fun, you're in for a real treat. And then again after about the 200 hour break-in period.

H9

audiocr381ve

heiney9 wrote: »

Have fun, you're in for a real treat. And then again after about the 200 hour break-in period.

H9

I can hardly wait! ALL parts are now ordered. What a killer deal for the Axom's, thanks again for the recommendation.

I'm gonna be a real pain with the question asking when it comes to opening these speakers up and actually doing the upgrade. I've read TONS of information but their are still some things I'm not clear about. I guess I'll cross that bridge later this week

audiocr381ve

Hey guys, I packaged up my RD0-194's because they sold. I want to install the RD0-198's because they are sitting on the table unprotected! I'm not gonna run my system until I perform the mod, so they'll be fine.

My question is, on the right speaker, the Black (-) wire was at the top terminal of the tweeter, and on the left speaker the White (+) wire was on the top terminal. Weird. Which way do they go in?

Also, I expected this but one of the tweeter speaker terminals is bigger on the RD0-198's SO it doesn't fit with the stock wires. If I strip the wire can I solder it directly to the terminal? Thanks guys.

jcandy

audiocr381ve wrote: »

My question is, on the right speaker, the Black (-) wire was at the top terminal of the tweeter, and on the left speaker the White (+) wire was on the top terminal. Weird. Which way do they go in?

The black wire is connected to the positive (+) tweeter terminal, white is connected to the negative (-) tweeter terminal. Switching them will result in a phase mismatch and a deep null in the 2kHz region.