SDA SRS 1.2tl
davis419b
Posts: 61
I picked up a set of these several weeks back and really like them. When I first started listening to them they sounded fantastic. As time passed it seemed as though the highs went away. I am wanting to do both mods by changing out the tweeters for 198,s and having the crossovers redone. I cant afford to do both at the same time so I am looking for your advice on which I should do first. All of your help is greatly appreceiated !!
Don
Don
Post edited by davis419b on
Comments
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If the highs are going away then it may be the polyswitch going bad or the tweets failing. If you have been playing music at high levels then the poly switch may have kicked in and cut off your tweets. You can try and test the tweets, naturally if they work, go the crossover mod route first. The SL3000 tweets are good tweets. Some like them as much as the RDO 198's. It's a matter of preferance. Good luck.Polk HT system 1: LSIC, LSI25 mains, LSI F/X rears, Lsi F/X rear centers,
Yamaha RX-V2500 System, Carver A753 3 channel amp.
Polk HT system 2: , SRT system with f/x 1,000's rear speakers on 7.1 system currently using Onkyo TX-RZ820 receiver, powered by Sunfire Grand Theater amp
Polk Speaker collection: SDA SRS 1.2tl x 2, SRT system, SDA SRS 2 P/B, SDA 2A, SDA 1C Studio, SDA CRS+, Monitor 7B & 4, SRS 3.1tl, RTA 15tl, LS90, LSI 9 -
^^^right on the money. I did like the SL3000s but they at times sounded a little brassy and I went with the RD0198s. Make sure when you call Polk CS for the RD0s you tell them you are a Polk Forum member, you'll get a discount and depending on where you live free 2 day shipping.
BTW when I redid my crossovers I used Soniccaps and Mills resistors and jumpered where the polyswitches are. I haven't tried the .5 ohm resistor tweak in place of the jumpers yet but from what I understand it makes a real nice change in the highs.
Don't forget the Dynamat & Mortite tweaks too.
Congrats, good luck and welcome to the 1.2TL owners club! -
I would like to redo the crossovers but am not very good with a soldering iron or schematics. I have read here on the forum about a fella that redoes them. I am thinking his name was Ben. Does anybody know how to reach him ? I have a local tech but I am not sure he know exactly what the mods are.
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What are you using to power your 1.2's? If the Poly-switches tripped, it may be because the amp was clipping under the load at higher volumes.Home Theater:
Onkyo TX-SR805
Behringer EP2500 for SDA's
Polk SDA II fronts
Polk Monitor 5Jr. surrounds
Polk Monitor 4 back surrounds
DIY A7-900 and DIY A3-300 -
I would like to redo the crossovers but am not very good with a soldering iron or schematics. I have read here on the forum about a fella that redoes them. I am thinking his name was Ben. Does anybody know how to reach him ? I have a local tech but I am not sure he know exactly what the mods are.
The guy you are looking for is ben62670.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Driver_King wrote: »What are you using to power your 1.2's? If the Poly-switches tripped, it may be because the amp was clipping under the load at higher volumes.
What you are saying makes since. I am using a Sansui 8080 db which sounds fantastic with them but it is only 85wpc. Is there a way to reset the polyswitch ? -
The guy you are looking for is ben62670.
Ben recently modded the x-overs for my recently acquired 1.2TLs. Well worth the cheddar; he did one helluva job.
Don't skimp on the parts. You may regret it later. -
What you are saying makes since. I am using a Sansui 8080 db which sounds fantastic with them but it is only 85wpc. Is there a way to reset the polyswitch ?
Polyswitches reset themselves, but they wear out with age.
You need more amp. I clipped out a 125W Bryston 3B on my 1.2TLs, and that's about the most solid 125W amp you can buy. Go shopping for a quality 200WPC minimum. -
Just an FYI, one can clip just about any amp made, not all, but most. So, it becomes a matter of how loud you want your rig to be able to play. The difference in maximum SPL levels is surprising small between 85wpc and 200wpc, but it may be enough for one to make the move.
Here's an example, if you want to listen at 115dB levels, you will need a high current amp capable of over 500wpc driving the 1.2TL's.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Your 1.2's can take up to 1000 watts per channel. I recently picked up a Behringer EP2500 at $160 on eBay. I purchased it off a recommendation of a friend who compared his Carver amps to his Behringer EP4000 and am very glad I did. As you turn up the volume, there is no audible distortion and it becomes difficult to tell how loud you actually have it. That's along with the additional benefits of headroom and sound quality of the amplifier. Here is a new EP4000 that's reasonably priced. There is a cheap and simple fan modification you can do to make the unit run whisper quiet. You can read more about the amp here.Home Theater:
Onkyo TX-SR805
Behringer EP2500 for SDA's
Polk SDA II fronts
Polk Monitor 5Jr. surrounds
Polk Monitor 4 back surrounds
DIY A7-900 and DIY A3-300 -
Driver_King, not to be insulting, but Behringer is not known for build quality or sound quality. Pro amps in general are poor choices for home audio. Yes, they have high wpc ratings, but they lack the finesse of a good home audio amp.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
^ +1 I have had experience with Behringer amps in the guitar/band area. And it was not pretty at all. Not sure I would drive 1.2TL's with them.--Gary--
Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out. -
Driver_King, not to be insulting, but Behringer is not known for build quality or sound quality. Pro amps in general are poor choices for home audio. Yes, they have high wpc ratings, but they lack the finesse of a good home audio amp.
Fortunately, Behringer, at least with the EP line, stepped up their QC and build quality. They are built better than comparable QSC and Crown amps. As I said, I had a friend compare his EP4000 and some of his Carver amps and he said he found the SQ much more appealing with the Behringer versus the Carvers, notably in detail. I had been using a vintage Technics SU-7300 amplifier, which is a Class A amplifier. I guess you could say it sounded a bit warmer, which I liked at the time, but having the Behringer now is really a night and day improvement overall SQ wise. I was on the verge of picking up one of the Carver amps that was compared to the Behringer, which is the main reason I picked it up, not to mention what I paid for it.Home Theater:
Onkyo TX-SR805
Behringer EP2500 for SDA's
Polk SDA II fronts
Polk Monitor 5Jr. surrounds
Polk Monitor 4 back surrounds
DIY A7-900 and DIY A3-300 -
^ +1 I have had experience with Behringer amps in the guitar/band area. And it was not pretty at all. Not sure I would drive 1.2TL's with them.
To be clear, I'm not defending Behringer as a whole. I know they've had a bad reputation for quality and sound before. The EP line has been a proven line of amps since it was launched a couple of years ago, namely in subwoofer applications. The unit was benched to run at over 650 watts at 4.4 ohms at less than .02% distortion with both channels driven, which is pretty impressive.Home Theater:
Onkyo TX-SR805
Behringer EP2500 for SDA's
Polk SDA II fronts
Polk Monitor 5Jr. surrounds
Polk Monitor 4 back surrounds
DIY A7-900 and DIY A3-300 -
Ben did the my SDA 1C x-overs and Zingo my RTA 15 TL's. Both did a great job and are good guys to deal with.
You won't believe the difference in sound quality when they are done!
