SDA2's Specs

renowilliams

I'm looking at getting my first SDA's. I have found a pair 2.5 hour drive from here and looking to get them this week-end. I am wonderring whether I'll be ok driving them with my reciever. Does anyone have the specs for these speakers?

Any info would be apprieciated.



Tim

ben62670

Which SDA2's are they?

renowilliams

Here is a link to the add,maybe you can tell.


http://ontario.kijiji.ca/c-buy-and-sell-electronics-Polk-audio-speakers-W0QQAdIdZ266935600

On3s&Z3r0s

Looks like 2A's in very nice shape. I drive my 2B's with a NAD 55wpc receiver with no problems. It's tricky to find accurate specs for some of the SDA models going back that far. But I think maybe the ones for the CRS+ would be close?

http://www.polkaudio.com/homeaudio/specs/recent/sdacrs+/

ben62670

Those are either 2a's or 2b's. Either case they are very nice SDA's. IMHO I have heard many different SDA's and these are some of the best sounding SDA's in a normal enviorment. Also they are cheap to upgrade.
Ben

On3s&Z3r0s

Yeah, I guessed 2A's because of the style of the cabinet. I think most of the 2B's had the cabinets that look like these



Unless they are the all-black studios (which I have). From what I've gathered the blade/blade interconnect would make them likely 2A's but possibly the earliest 2B's. If they have a pin/blade interconnect they are definitely 2B's, but again based on the cabs I kinda doubt you'll see a pin/blade on those.

+1 on them being a great sounding speaker for a normal size room.

renowilliams

The room I'm putting them in is 14x12.


http://www.flickr.com/photos/renowilliams/5086704366/

On3s&Z3r0s

They are definitely more than enough speaker for that space. And the picture above notwithstanding, you won't need a sub for 2-channel listening. They make a surpising amount of bass. What kind of receiver do you have? SDA's all seem to prefer high-current amps and it should be able to drive a 4ohm load (I think these are nominally 6ohm).

renowilliams

My reciever is pretty powerful Pioneer elite VSX-49Txi.

Here are measurements http://www.ultimateavmag.com/content/pioneer-elite-vsx-49tx-av-receiver-measurementsken by

On3s&Z3r0s

A Pio Elite with 160wpc... I dunno, I'd say you're cutting it close.

ben62670

The 2A's are 4ohms.

Melz709

On3s...when my system grows up, it wants to look like yours...lol.

chandler9a

I've tried running my SDA 2A's with a high end AVR and while it sounds good, nothing compares to getting a good two channel power amp to run them properly.

I say get them and start the journey.

On3s&Z3r0s

Didn't mean to misrepresent... that system's not mine, just an example of what the 2B's (the later ones anyway) look like.

renowilliams

Noone has given me the actual specs for the sda 2A VS 2B's yet. Anyone know??

On3s&Z3r0s

What kind of specs are you looking for exactly? The 2B's are 6ohm nominal impedance, and if Ben says the 2A's are 4ohm I'd take his word on it. I think most of these smaller SDA's are right around 92db efficiency. Whatever it is I doubt there'd be much difference between the 2A and 2B. The owners manuals for these speakers didn't give very much in the way of specs, not even an effective frequency range.

snotpmah

I have 2a's and the original booklet lists them as 5 ohms.

On3s&Z3r0s

Yeah, it seems like the manuals for the "A" vintage and earlier SDAs gave a DC Resistance number. I think that's what the 5 ohms is. Then in the SDA 1C/2B/CRS+ manual they switch to stating a value for Nominal (AC) Impedance and give that as 6ohms. Treating all of these as 4ohm speakers is probably the safe bet. For example, some receivers/amps (like the NAD I use) have a switch for 4 vs. 8 ohm, and I use 4 for my SDA 2B's.

snotpmah

Cool, thanks for the info.

renowilliams

Well thanks for all the help....I'm going tomorrow to get them

chandler9a

Great speakers, I have them and with the right equipment and room they sound wonderful.
Keep us posted on what you think of them.

backsigns

I used to have a spec sheet for my SDA 2's with 2 sl2000 tweeters and I think they are rated at 8 ohms but I can't remember the efficiency rating, but the low end was rated as going to 36 Hz. I wish I could find that spec sheet again.

backsigns

I meant to say 2 tweeters each speaker

On3s&Z3r0s

I've got an owner's manual for the original SDA 2's and it gives their DCR as 5 ohms. It'd be cool to see a spec sheet... I don't know why Polk wouldn't have put that info in the manual with all the other detailed information they put in there about the crossovers and drivers.

renowilliams

Well,I went on a 5 hour road trip today and picked them up. Natually,my father called while I was gone as he made a deacons bench for my wife and wanted to get it out of his shop today. So upon getting home I had to deal with that. Anyway the speakers are now set up. I was totally stoked when I first laid eyes on them as they look like they just unpacked new!!!!! There is just one chip on one corner of one speaker. Other than that they are pristine.

So I've hooked them up and put some Floyd on. I knew they were going to sound good,but they sound incredible!!!!!!!

The sound seems to envelop you.

Next, I'll get a Rotel or Carver amp.

chandler9a

haha, thats SDA for ya. Glad you like them. You might have mentioned it already but what are you driving them with?

If you are choosing btwn those two amps I'd go with Rotel... not that there's anything wrong with Carver. just my opinion

renowilliams

I'm using a pioneer elite VSX-49TXi reciever at the momment and it seems fine but I will get a power amp.First,I think I'm going to sell my RTiA5's and PSW125 sub.

chandler9a

Great, you will be amazed with what a nice amp will do. Enjoy the journey

renowilliams

Whats your thoughts of me using my elite reciever as a pre amp and getting a Rotel RB 1070 amp??