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These are the SDA 1A's I modified, if you read the SDA 1A.1TL Mod on this forum you will find that they were done correctly, I'm amazed this wasn't picked up earlier instead of assuming. The person I...

Just for fun I was comparing my modified Altec A7-500's against the modified 1A's I've been working on and mentioned in prior threads - both are good but different, the SDA's have greater bottom and...

Has there been any mention of publishing a third edition of the SDA Compendium.

Does anyone have a electronic copy of the SDA Compendium because it would be good to have as there is no way now of getting a copy as this publication is now unavailable.

F1nut, Thanks for the advice, will try putting speakers closer, let you know the outcome.

F1nut,
The topic about positioning was when this chap said he was told by a Polk rep that SDA should be placed 1' from the side walls and that he knew more than anyone else on this forum site.

Guys, what's all this about, I hope not at my expense.

F1nut,
I could have some fun here!!! Remember that post about a person going off about the advise from a Polk rep saying about the recommended positioning and everyone else were stating what was in...

Speakers are about 12' apart and 3' away from the side walls and I'm sitting about 15' back, 8'6" ceiling. The chair I sit in is about 1' from the back wall. The amp I'm using is a high current...

Ben,
As I have the old blade/blade style is it a matter of just cutting into one wire or do I have to cut into both. I think I've answered my own question as the two wires both carry inverting...

The piano solo statement I suppose was a little exaggerated but to me its just seems that some things seem too far apart. Another example would be vocals, when the person singing seems to drift left...

I know this might be a dumb question but has anyone tried to adjust the SDA signal e.g. by putting a rheostat in the interconnect cable to vary the SDA signal. The reason I am asking this is because...

Done some more work, painted the wooden blanks black and made a small angled tweeter mounting plate. The reason why I made the angled face plate was that after some listening I was finding that the...

BK201,.
Nice looking 1A's, later after you have had a good listen to your speakers you could carry out the mod http://www.polkaudio.com/forums/showthread.php?t=70329 I posted out, you will be...

GV#27,
The SDA-1A's are 91dB, so I will have to drop about 4 dB. The xover point is 2.5K.

ben62670,
How did you go with this mod?, what was the model Morel tweeter used. Its funny how you had the same idea as what I did with my SDA-1A's e.g. SDA-1A.1TL mod. Whilst I am still waiting for...

Silly me , brain in neutral again, helps if you read the schematics properly.

dcmeigs
I am sorry for thinking that you carried out this 1A.1TL mod, I also tried disconnecting one tweeter but the problem still remained, that is, the tweeter wasn't projecting correctly as it...

Went and had a listen to the B&W DM6's, all I can say is that the modified 1A's are a lot better in many ways, the B&W's are just so flat and uninspiring. I suppose it just proved to myself finally...

Someone has offered to swap his pristine B&W DM6's for those modified SDA-1A of mine. This model B&W is one of the few I haven't yet heard, as this person lives on the other side of town I want to...

Lasareath, I know the bass drivers are powering the ABR below 100hz but what about 100hz upwards. The seperate drivers which have been asigned the bass duties below 100hz will be trying to drive the...

Why were the midrange units on the larger SDA speakers fitted without seperate enclosure housings, the only exception being the original SDA-1 - the separate enclosure was later removed when the 1A...

dcmeigs, Thanks for having the courage to do this mod, hopefully others will follow. What was the most noticeable thing to your ears after completing this mod, this is for the sake of others who...

Why don't you carry out the SDA-1A.1TL Modification I posted earlier, I know Aussies speak a little different but it's still basic English. You won't have to worry about people saying that their ...

I am still deciding which material would be best to stop the diffraction between the tweeter and the top part of the non rebated midranges. I know this might sound strange but has anyone used scotch...