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Showing content with the highest reputation on 06/06/2016 in all areas
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I am picky about new(current) rock artist. Remember I am an old fart. But these guys are talented!2 points
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My son Zack was recently gifted a set of one-owner Polk SDS-SRS 1.2tl's by member dcl. These massive speakers (63" tall and 180 pounds each) were TOTL for Polk in the late 80's/early 90's. They hadn't been used in a while and the grill and corner cloth on both speakers had been trashed by his cats. A look-see on pickup day revealed a dented mid bass dust cap and rips/tears in several mid bass surrounds. The natural oak finish needed a good oiling but overall was in pretty good shape. After trucking them from the DC area we hauled them up to Zack's 22' x 22' bedroom and set them up. A closer look at the mid bass surrounds revealed damage to all ranging from pinholes to inch wide rips. The 1.2's are sealed speakers so I was a bit concerned about how they would perform with the seal breached. We hooked them up to Zack's bedroom system - a recapped M-1.5t, CT-7, DTL-200MK2 and MP3 player. I was relieved when they sounded excellent at low and medium volume and only started to chuff a bit a high SPL. A few days later Zack was out at a friend's house for a overnighter so I decided to do some work on them. David included enough material to redo both speakers (and then some) so I started with one of the speaker grills. Pretty simple: remove the staples and old cloth, lay the frame on the new material, cut to fit, stretch and staple. Here's the recovered grill (left) next to an original (apparently recovered once before with black window screen?): Another shot with the recovered grill mounted (the side panel that has been removed is my next project): Lots more to come once Zack is back at school.1 point
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Apparently the Carver Site isn't the only place where awesomeness occurs on a regular basis. I recently received a Christmas Karma for Zack from a group of mostly anonymous PolkAudio members. (I only know that Toolfan66 was involved because he messaged me to ask for my shipping address.) The generous gift includes a full set of "Larry's Rings" (mounting brackets for bolting in the drivers): Also Gimpod boards, ClarityCaps, Jantzen coils and higher tolerance 10 watt MOx resistors to upgrade the XOs: Zack doesn't know yet. I'll probably tell/show him tomorrow night after I pick him up at the airport. Hopefully he'll have time to help me install some of the upgrades while he's home for winter break.1 point
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zumbini, You wrote: "While waiting for them to arrive I figured it would be smart to determine why the originals failed" Just some FYI on the tweeters, you had me thinking about the non-working tweeters I pulled from my SDS SRS 1.2tl's and so far the 3 I have looked at have had the following issues: (2) Open wire where it goes into the dome (1) Intermittent open where it goes into the dome Used 30 gauge wire to repair the damaged wires. 40X microsope and a nice soldering iron I will be looking at the rest of them tomorrow but my point is most of the time it is just age which do these in. Try putting a multi-meter on the connectors + and - and gently push on the dome where both wires go into the dome and see if you get continuity or at least something registering on the meter - best to take them apart and remove that sticky foam they have on the outside around the tweeter dome and then do your test. The other check is to just look at the voice coil my bet is that all of the voice coils look good which would indicate a broken wire. For this "T2: left = 14.0 ohms; right = 14.2 ohms" - this looks correct 11.5 Ohms + 2.7 Ohms = 14.2 Ohms T3 I would think should be 25.2 Ohm unless I am missing something - 22.5 Ohms + 2.7 Ohms = 25.2 Ohms ?? The white stuff on the resistor is normal - as long as they read the correct resistance your good and those do not go bad very often - I have never seen one go bad anyway but that doesn't mean it can't happen. I would think it is going to be a little more difficult to detect a bad cap as what normally happens is that the caps get dried out and change value due to their age. Someone else like to chime in on this one?1 point
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Eventhough I own a SWEET Pair of SDA-SRS 2 I am here to see the progress and to say All fun aside E N J O Y1 point