Sda srs amp questions

halo71

Yay, more attitude.

nooshinjohn

ooklaa wrote: »

I gave no attitude until members started pressing me. Read from the beginning to the end and see how the thread is told.

Those who helped with my original question thank you.

The rest of you need to get some p****

Way to keep it classy mate...

ooklaa

Yes I keep it classy how about you mate?

I guess when you called me a troll and assumed I'm in car audio guy like it's some diss. O that's right you where showing me love halo right?

Thanks for the chat guys but I'll be the man and step away can't waste anymore time. Have fun.

nooshinjohn

I never called you any names at all, but I guess if you want me to start, I can. All I did was offer an opinion that your speakers would sound their best using the Mac's, after which you started calling names and otherwise being an a$$hat.

Trolls are sometimes nice people, but you sir are something else.

ooklaa

THe troll comment was meant for halo71. Hence the reason I stated "showing me love Halo right"

Have fun guys I'm out.

nooshinjohn

Buh-Bye...

halo71

See ya! lol

Schurkey

Awww, c'mon.

I don't see getting all angry about Pro amps vs. Consumer amps. I'm old enough to remember the Crown Macro-Reference being a media darling for about six months; all those years ago.

Yes, in general I suspect--but have not confirmed--that the typical Pro amp has a sh!tload of watts and not-so-much refinement. If there's truth to that, ooklaa will learn it in his own time. And if there isn't, I've wasted a fair amount of dollars buying "high end" amps when I could have had more-powerful pro amps. The joke will have been on me.

No need to get nasty about any of this.

halo71

The rub here is that he asked questions about what amp(s) to use. Said he had no or limited experience with home audio. And people give their experience and he basically tells them they are wrong. That it can't be that much better or worth that much money. Why ask people the questions at all. If he has no experience or tried the suggestions he is just speculating.

Kinda like taking your car to the mechanic. He tells you what is wrong and then you tell him that you don't think that is the matter. When all you know about cars is how to put gas in one. lol

ooklaa

[/quote]
I have many many amplifiers at my disposal. But here is the question, if you had a 750 watt 2 channel amp would you run it direct to one the of binding post with the bridges on. Or would you remove the bridges and bi amp the speaker with say a 350 watt 2 channel amp.
[/quote]

I guess you cant read halo71 maybe cause your to busy calling people names and not reading.

PLEASE READ SLOWLY AT YOUR OWN PACE.

Where do you see pro amp vs consumer amp? I also said i have limited knowledge with consumer amps not experience.

michaeljhsda2

"would you run it direct to one the of binding post with the bridges on?"

Yes. Try it with the 750 watt amp and see how it sounds. After a while disconnect the 750 watter and then hook up the 350 watt amp and see how it sounds. From my experience and from others as well, there is no advantage or improvement in sound quality when biamping.

tonyb

DSkip wrote: »

Knowledge and experience are on and the same as far as great 2 channel sound goes. I'm surprised at this rate that nobody has told him how vintage SS McIntosh's are regarded. Those QSC amps might actually sound better.

We would have Skip, but he's a tad touchy wouldn't you say ?

ooklaa

Maybe i didnt explain myself as well as other can with the connecting parts in the beginning sorry. i only have the IC cable for the 1.2tl the other big boys im either gonna make or buy. i have a boat load of work to do for my man cave someverything is a slow working progress. I also know that the srs deserve bigger spaces but my room is 15x30. With the tv and entertainment center its gonna be hard to get the true sound SDA sound. I am very lucky to have 2 pairs of these bad boys. I will say I bought these originally for their size and look. Their are going to hooked up in a 5.1 theater setup. Please lets not start another debate about now. Im a home body now as im not touring anymore so I love watching movies and playing some games(rarely).

Upgrades are coming but in time to both pairs. Def gonna do the upgrade tweeters called polk already for proce 48 dollars a tweeter but i have been reading they have sold for 40. Def want the steel rings, better insulation also, do the wire upgrades inside-and the last will be the crossover from vr3.

The mcintosh are actually in great shape, the (2)2500 i sent out to give a buddy of mine some work(meraly cosmetic stuff). Retired military guy thats has been working on old tube amps etc on the side for decades.

Schurkey

Schurkey wrote: »

ARE THESE AMPS COMMON-GROUND? If not, you're going to need a Dreadnought if you use them on the 1.2TLs in your signature. The original version of the SRS is not Dreadnought-compatible, so you CANNOT use a non-common-ground amplifier unless you remove the SDA interconnect cable from the back of the two speakers.

Quoting myself for emphasis. I have not seen this addressed in this thread, and it's crucial if you intend to use the SDA interconnect cable with the original-version SRS. I do not know that the QSC (or the Macs, for that matter) amps are not common-ground; but any time I see amplifiers that are changeable from 4 to 2 to 1 channel, I make the assumption that they're being bridged; and bridged amplifiers CANNOT be common-ground. If the amplifier channels aren't bridged, they may still not be common-ground. Sometimes there are work-arounds, and sometimes not. My own amplifiers require a short jumper wire between the negative speaker connectors to drop the 20-ohm "almost-common-ground" to zero ohms for a true common-ground. I will say with assurance, 20 ohms of resistance between the negative terminals will make SDA speakers unlistenable. More resistance--or perhaps turning the volume up farther than I tend to--can cause amplifier or speaker damage.

The interconnect cable you need (blade/blade) is still available from Polk, so far as I know. If it were me, I'd modify the speakers to use a more-modern plug-and-socket connection. Speakon connectors, and the same speaker cable you're using from amplifier-to-speaker has been highly regarded for use as the SDA interconnect.

halo71

lol.....thought you were "out"?!?

Good luck to you in whatever you choose to do with your SDA's.

ooklaa

Lol so did I. but the spartan in me wont let me.

halo71

Well tell that Spartan if he don't give you a rest you ain't gonna be able to walk straight tomorrow. lol

leftwinger57

largest wattage amp I ever heard of is the McIntosh 2600 at 600 per side. 750 is one big honkin amp if it exists.


http://www.roger-russell.com/amplif2.htm

F1nut

You need to get out more Lew and stop posting links to that a$$hat.

motorstereo

Hook up one of those 2500's to your 1.2s and call it a day. As others have said don't even waste your time with pro amps. I've had quite a parade of amps come and go but my amp hunt stopped when I brought a 2500 home a few years ago. It's clearly head and shoulder's above all the carvers, yamahas, qsc's, etc. that I used in the past.
You'll need a dreadnaught isolation transformer if you decide to run your pair of 2500's. Someday I'd like to add a 2nd 2500 just for **** and giggles to see how 1000+ wpc of Mac power would light up my 1.2tl's. Until that happens though a single will do just fine.

tonyb

F1nut wrote: »

You need to get out more Lew and stop posting links to that a$$hat.

.....ditto, and he should know better by now. Looks like Cathy has her first stop come spring.

michaeljhsda2

motorstereo wrote: »

As others have said don't even waste your time with pro amps.

Been there, done that with pro amps as well. Yeah I had 1200 WPC!!! but the quality of sound wasn't nearly as good compared to the 50 watt tube amp I use to run my 1.2TL's. You probably already know this but the SRS 1.2 and 1.2TL's are an easy load to drive, not sure about the original SRS.

tonyb

michaeljhsda2 wrote: »

motorstereo wrote: »

As others have said don't even waste your time with pro amps.

Been there, done that with pro amps as well. Yeah I had 1200 WPC!!! but the quality of sound wasn't nearly as good compared to the 50 watt tube amp I use to run my 1.2TL's. You probably already know this but the SRS 1.2 and 1.2TL's are an easy load to drive, not sure about the original SRS.

But....but how can that be ? LOL

I smile every time someone posts things like this. Those that don't know, just don't know what is possible. Rock on bro.

halo71

Well I'm just happier than a pig in **** with my 165 wpc and a Bottlehead on my SDA's. lol

Polkie2009

Schurkey wrote: »

Schurkey wrote: »

ARE THESE AMPS COMMON-GROUND? If not, you're going to need a Dreadnought if you use them on the 1.2TLs in your signature. The original version of the SRS is not Dreadnought-compatible, so you CANNOT use a non-common-ground amplifier unless you remove the SDA interconnect cable from the back of the two speakers.

Quoting myself for emphasis. I have not seen this addressed in this thread, and it's crucial if you intend to use the SDA interconnect cable with the original-version SRS. I do not know that the QSC (or the Macs, for that matter) amps are not common-ground; but any time I see amplifiers that are changeable from 4 to 2 to 1 channel, I make the assumption that they're being bridged; and bridged amplifiers CANNOT be common-ground. If the amplifier channels aren't bridged, they may still not be common-ground. Sometimes there are work-arounds, and sometimes not. My own amplifiers require a short jumper wire between the negative speaker connectors to drop the 20-ohm "almost-common-ground" to zero ohms for a true common-ground. I will say with assurance, 20 ohms of resistance between the negative terminals will make SDA speakers unlistenable. More resistance--or perhaps turning the volume up farther than I tend to--can cause amplifier or speaker damage.

The interconnect cable you need (blade/blade) is still available from Polk, so far as I know. If it were me, I'd modify the speakers to use a more-modern plug-and-socket connection. Speakon connectors, and the same speaker cable you're using from amplifier-to-speaker has been highly regarded for use as the SDA interconnect.

Shurkey, that 20 ohms of resistance you mentioned sounds like you're running a Aragon 8008bb?

Schurkey

Polkie2009 wrote: »

Shurkey, that 20 ohms of resistance you mentioned sounds like you're running a Aragon 8008bb?

Completely correct--although I suspect any of the Aragon 8000-series amps would qualify, such as 8002, 8008x3, 8008ST, etc.

The negative terminals on my BBs are each isolated from chassis ground by a ten-ohm resistor. From one negative terminal to the other, the circuit includes both ten-ohm resistors, so 20 ohms from a negative terminal to the negative terminal of the other channel.

Adcom, Parasound, and who knows how many other amplifiers use a similar system, but with different resistor values. Apparently it isolates some amount of noise from the negative terminals. I've heard of 200 ohms between negative terminals on other amplifiers, indicating two 100-ohm resistors where the Aragon has 1/10 that value.

ooklaa

currently I am using my rti12 for sound, the big boys are not connected yet. i read that you use a dmm to test for continuty between the termials to test for commin ground.

I know you guys are super hifi but im just happy to have the gear i have . I have to do a whole lotta trial and error testing before i can start saying this is better or that is better for my situation. Now I do want them to kickbutt and sound awesome so i will take everyone advice and help. But if my amps happen not to be common ground then i gues the interconnect cables are going to be left off until imdo some further reading.

Hey when you guys are talking about about resistors from termials are you talking just a simple connection in the outside or are you talking about opening them up and doing some modifying to the circuit boards? Cause i will say iam not doing any type of internal modifying to my mcintosh or qsc.

Pictures of the mod would give me a woody

Schurkey

ooklaa wrote: »

Hey when you guys are talking about about resistors from termials are you talking just a simple connection in the outside or are you talking about opening them up and doing some modifying to the circuit boards? Cause i will say iam not doing any type of internal modifying to my mcintosh or qsc.

Pictures of the mod would give me a woody

The resistors are internal, buried, and I don't even know where they're located on the chassis or on the circuit board.

The "modification" involves poking a banana-plug terminated jumper wire into the negative terminal of one channel, routing the other end to a negative terminal of the other channel, and plugging that in. The jumper wire itself is nothing more than 12-guage insulated wire. Note that I can use this jumper wire because my amplifier is essentially common-ground already (except for the two resistors). If my amplifier was a multi-channel amp, or two separate amps where the channels were bridged, this trick wouldn't work, because bridged/balanced amps CANNOT BE COMMON GROUND.

Look at those QSCs carefully. I have a bad feeling about them in terms of being compatible with SDA speakers. As said, the newer SRS can be used with an isolation transformer to make them compatible with non-common-ground amplifiers, but your original SRS cannot.