Infinity RSII....??? Any one had ears on them?

audioluvr

Yup there it is!

audioluvr

A pile of smaller caps, if done right would work but those don't look ideal and could be due for replacement anyways.

Start with the these.

https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/DCM162U100AH2B?qs=sGAEpiMZZMsh%2B1woXyUXj963i0M1kpM8GPKBwin3yuc=

CH46E

audioluvr wrote: »

A pile of smaller caps, if done right would work but those don't look ideal and could be due for replacement anyways.

Start with the these.

https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/DCM162U100AH2B?qs=sGAEpiMZZMsh%2B1woXyUXj963i0M1kpM8GPKBwin3yuc=

They have been disconnected anyways for some reason.

CH46E

audioluvr wrote: »

A pile of smaller caps, if done right would work but those don't look ideal and could be due for replacement anyways.

Start with the these.

https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/DCM162U100AH2B?qs=sGAEpiMZZMsh%2B1woXyUXj963i0M1kpM8GPKBwin3yuc=

I sent for a quote for a pair of them.

I also found these. These would work too right?

https://www.mouser.com/ProductDetail/KEMET/ALS70A162KE450?qs=AQlKX63v8RvkjQoaay5Suw==

FTGV

CH46E wrote: »

Looking at this schematic it looks like the 1600 if cap is to cross the top woofer over at 125hz and the bottom to 50 or 60hz?

I tried to remove the woofers to test thier resistance, but they are damn sure stuck in there. I will tap the uppers out from the back. The lowers are going to have to be pryed out.

Nice pair of RS IIs. These along with the KEF 105.2's are my favourite speakers of that era. Heard them at the first audio show I ever attended as a young audio nut and I was smitten. They were driven by an amp from a then new company Classe. The DR3
HVC.

The 1600 uf cap in series with the woofers is actually used to extend bass response. It's a little trick also used in the KEF's. Bypassing them will mostly affect the very low bass response. The lower woofer is actually rolled off by the 30mh inductor and 600uf 12db low pass filter.

That's a real hog pog assembly on the crossover, but typical for speakers of the day.

CH46E

FTGV, thanks. That makes sense. I finally removed the lower woofer to make sure they are playing. They are indeed, but very very low output compared to the upper woofers. Even when I threw 50, 40 and 30 hz tones at them while out of the cabinet.

Gardenstater

@audioluvr I noticed that too.....interesting

Gardenstater

those Cornell Dubilier 1600uF caps DCM162U100AH2B have a tolerance of -10%, +75% (wow)

https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/DCM162U100AH2B?qs=sGAEpiMZZMsh%2B1woXyUXj963i0M1kpM8GPKBwin3yuc=

BinKY188_5

CH46E wrote: »

Got some of this today. Going to try and remove the back panel to access the pots now.

I know it says this is safe on plastic, but I've had this "soften" some plastic that I have used it on before.

gp4jesus

CH46E wrote: »

FTGV, thanks. That makes sense. I finally removed the lower woofer to make sure they are playing. They are indeed, but very very low output compared to the upper woofers. Even when I threw 50, 40 and 30 hz tones at them while out of the cabinet.

if you’re “testing” THROUGH the XO, you will experience perceived reduced output from the lower driver versus upper. Remember-the lower bass driver XO’d @~50hz(?) versus upper @125(?)

if drivers are out of the closure either driver’s output will diminish as frequency falls.

CH46E

gp4jesus wrote: »

CH46E wrote: »

FTGV, thanks. That makes sense. I finally removed the lower woofer to make sure they are playing. They are indeed, but very very low output compared to the upper woofers. Even when I threw 50, 40 and 30 hz tones at them while out of the cabinet.

if you’re “testing” THROUGH the XO, you will experience perceived reduced output from the lower driver versus upper. Remember-the lower bass driver XO’d @~50hz(?) versus upper @125(?)

if drivers are out of the closure either driver’s output will diminish as frequency falls.

I was judging based on very little cone movement on the lower woofer when in and out (Damn it, now I want a Double Double!) Of the enclosure. From day one I thought the lower woofers were not 100% for one reason or another.

I just wonder why someone would cut the 1600uf cap out. Cost maybe? In which case they did not deserve these speakers in the 1st place.

CH46E

I've been looking at the pics I took and man.... this is overwhelming. I have no idea how I'm going to pull off a recap. This point to point sucks!

Tony M

Hang in there Chris.

You can do it over time.

CH46E

I would normally replace one item at a time. But with these when I desolder one item for removal I'll be desoldering 4 different parts at once.

Tony M

Dang...that is a challenge for real.

audioluvr

Or you could contact Dave at DHS @westmassguy or any of the other guys on here capable and get a quote for having him build you a crossover.

treitz3

Just an FYI, Trey (@VR3) is down for the count right now and is not accepting any more work. He's got enough with his little baby girl now.

Tom

lawdogg

I believe in you

treitz3

That's the spirit!

Tom

CH46E

I've narrowed a basic search down to 2 different caps for the 1,600 uf I need to make these whole again. Can anyone tell me if these are not a good idea?

I see a lot of caps this size are -10% to +50% for tolerance. That's seems way to high for my liking. These that I found have a flat 20%.

https://www.mouser.com/ProductDetail/KEMET/ALS70A162KE450?qs=sGAEpiMZZMsh%2B1woXyUXjzRu9w46NtHruue2Kak1fJU=

https://www.tedss.com/82D162M200MF

https://www.tedss.com/U36D200LG162M51X92HP


Thanks guys!

Gardenstater

The Sprague is the outlier price-wise (very low), plus the size must be a typo at 35in. dia. x 63in. L (lol). I don't really know much about quality of capacitors. The Kemet gives an ESR of 117mOhms but I don't see any specs for the UCC.

Gardenstater

Interesting article on audiophile capacitors. Hope it helps:

http://aeaaudio.com/audiophile-quality-capacitors-going-beyond-the-simple-re-cap/

audioluvr

Vague info in that link but a good start. There are far more research minded links out there regarding "designer caps" Anybody here on this forum with even a tiny bit of experience with differing caps knows "cheap isn't always ideal" Even Mid-fi equipment (which most of us own) can improve significantly with cap upgrades. It's all a journey but if you're going there drive something fast and exotic! (if you can). BUT, and it's a big butt, If you can't hear these details, or don't care, don't waste your money. Just my 2 cents worth...

Gardenstater

Maybe this is more helpful:

http://lampizator.eu/UPGRADE/CAPACITORS/capacitors.html

audioluvr

Hah! Weird but yes better info!

audioluvr

Get your read on here...

http://www.humblehomemadehifi.com/Cap.html

audioluvr

Or here

http://www.laventure.net/tourist/caps.htm

CH46E

Just a quick update. I've been over on the Infinity section on AK and got some good info.

I placed an order last night for all the caps for the bass section, (Mundorf Electrolytic AC caps) they are some large values.

For the tweeters I paid more for a cap than I ever have. I went with the Jantzen Superior Z-Caps.

Over the next month I'll probably go with Jantzen Superior Z-Caps or their Silver Caps for the mid range section.

CH46E

Just a little bit bigger than I thought they would be

audioluvr

I used the Jantzen Z-series caps in the mid array of my Infinity RS4000's. Not as good as the ones you chose but I thought they turned out really good.