RDO 198s

sda2mike

i just recieved a pair of rdo 198s for a TL upgrade on my SDA2Bs...can anyone point me in the right direction for the tweeter connections? the 198 tabs are larger than the sl2000 or rdo 194 tabs.

thanks
mike

zarrdoss

parts express, radio shack

Schurkey

Or solder the wire to the terminal, and use a normal-size disconnect in-line somewhere.

I bought some smaller-than-usual push-on terminals; but even those were too large.

heiney9

Are you asking which is + and which is - or are you looking for the actual connector's?

sda2mike

actually, H9, i was eventually going to ask the polarity question...when i went with 194s, i just did it by ear, more or less..one cabinet has blue and white wires while the other has black and white,,,the ser #s are close too..

and yes, my original question was about the connectors going to the 198s

thanks
mike

dbaldus

If you're not going to use your old SL2000 connections, is there any chance I could have them? When I received my SDA SRS's, they were missing some of the stock connections and I'm always afraid the new ones (which are too big) are going to come undone.

If you're planning to use them for something else, no worries, but I figured it would be worth asking!

sda2mike

dbaldus wrote: »

If you're not going to use your old SL2000 connections, is there any chance I could have them? When I received my SDA SRS's, they were missing some of the stock connections and I'm always afraid the new ones (which are too big) are going to come undone.

If you're planning to use them for something else, no worries, but I figured it would be worth asking!

i see no problem with that! PM me yer perticklers:cool:

fafner

heiney9 wrote: »

Are you asking which is + and which is - or are you looking for the actual connector's?

So tell us, which is + and which is - ?

fafner

george daniel

black/blue =positive

Toolfan66

And the wide terminal = positive

inspiredsports

Mike,

Posts #54, 61 and 62 at http://www.polkaudio.com/forums/showthread.php?t=74945 have some images and information that might also help you out.

P.S.: Toolforlifefan . . . it was my impression back when I did the mod (and the schematics back me up) that the wider lug (white) on the RDO-198 is the negative lug and black (smaller) is +. Did I misinterpret?

Conradicles

I would guess somebody did it wrong lol.

sda2mike

thanks for the replies, everybody....on the rdo198, the smaller tab is painted red...wouldn't that indicate positive???

george daniel

IIRC--yes

black should be +

inspiredsports

sda2mike wrote: »

thanks for the replies, everybody....on the rdo198, the smaller tab is painted red...wouldn't that indicate positive???

As in my post above for my SDA-2B TL's, and also on my TL modded SDA SRS 2's, . . .

. . . Red Painted RDO-198 Tab = + = Black Wire . . . has worked perfectly for me.

Toolfan66

Conradicles wrote: »

I would guess somebody did it wrong lol.

No nobody did it wrong;) I was just seeing who was on there toes..:D

The wide terminal is your negitive..

Toolfan66

inspiredsports wrote: »

As in my post above for my SDA-2B TL's, and also on my TL modded SDA SRS 2's, . . .

. . . Red Painted RDO-198 Tab = + = Black Wire . . . has worked perfectly for me.

That is correct otherwise you would be out of phase.. My 1.2's were wired out of phase at the crossovers when I got them, they sounded just fine I never looked at it when I got them till someone here pointed it out and as far as I know there were 3 of us that had that same issue..

hearingimpared

Conradicles wrote: »

I would guess somebody did it wrong lol.

Believe it or not that is not an uncommon occurance.

Schurkey

Strangely enough, Polk has the tweeter polarity reversed on some models. The + post of the tweeter is actually connected to the - section of the crossover. The schematics bear this out.

Examples, from http://www.polkaudio.com/forums/showthread.php?t=55888 post #5
2.3TL (but not the 2.3)
1.2TL (but not the 1.2) (best example, shows color codes)
There may be others, I didn't do an exhaustive search.

Go figure.

Polk still used the white wire/colored wire pairing for the tweeters; the white wire is now the "powered" wire but goes to the - terminal. The colored wire--which in most of the other models is the "Powered" wire--connects the tweeter + terminal to ground. (In short, it seems that no matter what speaker model you have, a white wire goes to the - post on the tweeter, the colored wire (black is considered a color) goes to the + post, the + post may or may not be painted red.)

With regard to the "reverse polarity" speakers...HOW a person is supposed to keep those white wires in the correct positions is beyond me. The color code is--obviously--the same, yet each white wire carries a different (frequency/amplitude modified) signal depending on tweeter position. The colored wires which would be easy to keep in correct position...all go to the same place (ground).

This makes not a damned bit of sense to me; but there it is on the schematic, big as day. Maybe someone will confirm that there's an error in the schematics.

sda2mike

gotta keep this thread open before i committ to the snip snip:)

ben62670

The positive terminal is reversed on a few of the SL3000 SDA's because they are 3rd order XO's on the highs and 2nd order on the lows.

Schurkey

sda2mike wrote: »

i just recieved a pair of rdo 198s for a TL upgrade on my SDA2Bs...can anyone point me in the right direction for the tweeter connections? the 198 tabs are larger than the sl2000 or rdo 194 tabs.

thanks
mike

When I installed the 198s into my 1Bs, there was a terminal on the 198 tweeter that fit the existing wiring, and a terminal that was way too small for the existing wiring.

You're saying that one terminal is too LARGE on the 198 to fit your wiring???

What are the widths of the terminals you're working with?

sda2mike

Schurkey wrote: »

When I installed the 198s into my 1Bs, there was a terminal on the 198 tweeter that fit the existing wiring, and a terminal that was way too small for the existing wiring.

You're saying that one terminal is too LARGE on the 198 to fit your wiring???

What are the widths of the terminals you're working with?

No...you're right.....the tab that's red is too small. the other fits the existing female connector on my 2b

inspiredsports

Lets put this to bed with the facts.

Image of backside of RDO-198 (replaces SL-3000) with smaller (red painted) positive terminal (generally black wire) and wider negative terminal (generally white wire).

The RD0-194 (replaces SL-2000) has the smaller terminal on BOTH plus and minus poles.

I soldered a (1/8" to 1/4"?) female lug (seen at bottom of photo) from Radio Shack to my negative wire to keep it plug and play.

.

sda2mike

thanks, i.s.! my 198s are plain, no writing, on the magnet. the small terminal is red though...

sda2mike

ya got me thinkin, I.R.,...........i wonder if anyone has a female to male adaptor for the 198 small terminal??

sda2mike

well it's a proud moment!:p my step-son has a soldering iron, so i got all brave! i did it my 1st! it's kinda cool, too! i like the soldering feel:) anyway, thanks for all the helpful polkforum help...my Xover's should be home this week!

WastelandWand'r

SDA2,
I think inspired added the text to that photo for us 'visual' type of people who have a hard time drawing a mental picture from words alone.
Have fun with the soldering and enjoy the new tweets.
Nathan

inspiredsports

WastelandWand'r wrote: »

. . . I think inspired added the text to that photo . . . Nathan

Correct, the back of the RDO-198 has no writing . . . I added the text with an image editing tool to illustrate what's what.

sda2mike

Ha! now that's a frkn riot!