I just fried one of my 1C's. Like literally, smoke. See pic...
Comments
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That sucks!!! But I had to save that pic in my photos..
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That is an awesome photo (as photos go). Not an awesome situation though.:frown: I am glad you have the replacement drivers on hand already. Definately JB weld, etc. them before installing them. Keep us posted on the recovery.
Greg
Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
"I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion."![:\](https://forum.polkaudio.com/resources/emoji/confused.png ":\")
My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....
"Green leaves reveal the heart spoken Khatru"- Jon Anderson
"Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee -
The older repair techs can tell you how often this happens when you mix a tube preamp and a SS power amp.
The output blocking cap on the preamp stage can and will let thru a blip of DC as it charges up upon power up. You get by with it some and then again sometimes not. It's just that much more important to try and remember the correct power up sequence. Mixing a really potent amp like a Krell increases what can be driven into the poor little voice coils.
Hope the amp is ok and you get the speakers straightened out! Thanks for sharing the picture...it's a great cautionary story for all!!
CJA so called science type proudly says... "I do realize that I would fool myself all the time, about listening conclusions and many other observations, if I did listen before buying. That’s why I don’t, I bought all of my current gear based on technical parameters alone, such as specs and measurements."
More amazing Internet Science Pink Panther wisdom..."My DAC has since been upgraded from Mark Levinson to Topping." -
CJ, maybe you could give everyone who's interested a rundown of the correct power up/down sequences. From what I understand it would go (at power up): source, DAC (if there is one), pre-amp, amp. Or, basically lower power (current) gear to higher power gear. Then, the opposite would be true at power down: amp, pre-amp, DAC, source(s). Sound about right? I know this is a little off topic from the OP, but still relavent and useful.
Greg
Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
"I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion."
My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....
"Green leaves reveal the heart spoken Khatru"- Jon Anderson
"Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee -
What were you playing? Smoke on the Water or Purple Haze? Talk about realistic sound!>
>
>This message has been scanned by the NSA and found to be free of harmful intent.< -
Yes any direct coupled design will pass or even amplify the DC doing the voicecoils no good at all.Mixing a really potent amp like a Krell increases what can be driven into the poor little voice coils.CJ, maybe you could give everyone who's interested a rundown of the correct power up/down sequences. From what I understand it would go (at power up): source, DAC (if there is one), pre-amp, amp. Or, basically lower power (current) gear to higher power gear. Then, the opposite would be true at power down: amp, pre-amp, DAC, source(s). Sound about right? I know this is a little off topic from the OP, but still relavent and useful.
Greg
Always amp on last off first. -
That is one of the coolest pics EVER.
Damn I was thinking the same.
BTW anytime a speaker does that, your amp died. IHMO. The amp died placed one of the buses voltage out so the speaker could have seen 40v to 80vdc. Blowing the speaker up.
Speakers
Carver Amazing Fronts
CS400i Center
RT800i's Rears
Sub Paradigm Servo 15
Electronics
Conrad Johnson PV-5 pre-amp
Parasound Halo A23
Pioneer 84TXSi AVR
Pioneer 79Avi DVD
Sony CX400 CD changer
Panasonic 42-PX60U Plasma
WMC Win7 32bit HD DVR -
I already have the armacell. Is there a thread showing pics of installing it? The stuff isn't thick enough to cut a full size round piece from a template. So what do you do? Cut it into thin strips and then curl it around the drivers?
That's how I did it. Measure the circumference of the speaker, then cut a piece about 1/2 inch longer. Use a razor knife and a straight edge to split that into 4 strips lengthwise. Make sure you have a fairly hard backing, because you need to put a lot of force on the straight edge as you move it. Otherwise, the armacell will tend to chunk instead of forming nice strips. I applied mine to the back of the speaker.
For the tweeters, Just cut a rectangle that fits in in the tweeter hole, then cut a piece of paper the same size and run a pencil held so the side of the lead is against the paper with the paper in the cutout, and gently run it all over the paper until you have the outline of the tweeter cutout. Then just trim that out of the paper and use that to cut the hole for the tweeter in the armacell. That can be applied directly into the tweeter cutout or to the back of the tweeter.Turntable: Empire 208
Arm: Rega 300
Cart: Shelter 501 III
Phono Pre: Aural Thrills
Digital: Pioneer DV-79ai
Pre: Conrad Johnson ET3 SE
Amp: Conrad Johnson Evolution 2000
Cables: Cardas Neutral Reference
Speakers: SDA 2.3TL, heavily modified -
Entirely possible as looks like a considerable amount DC was involved.disneyjoe7 wrote: »
BTW anytime a speaker does that, your amp died. IHMO. The amp died placed one of the buses voltage out so the speaker could have seen 40v to 80vdc. Blowing the speaker up. -
Wow, I really hope I didn't damage the Krell. That would definitely not leave me with a positive attitude.Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
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I hope the Krell is ok too, but I do know there are a few models that are known for this. Reminds me nostolgic for the of old "Flame Linear" amps... ahhh the memories!:eek::redface:
The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD
“When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson -
I love the smell of audio smoke in the morning :eek:DKG999
HT System: LSi9, LSiCx2, LSiFX, LSi7, SVS 20-39 PC+, B&K 507.s2 AVR, B&K Ref 125.2, Tripplite LCR-2400, Cambridge 650BD, Signal Cable PC/SC, BJC IC, Samsung 55" LED
Music System: Magnepan 1.6QR, SVS SB12+, ARC pre, Parasound HCA1500 vertically bi-amped, Jolida CDP, Pro-Ject RM5.1SE TT, Pro-Ject TubeBox SE phono pre, SBT, PS Audio DLIII DAC -
As I suggested previously a check for DC at the outputs is prudent.Wow, I really hope I didn't damage the Krell. That would definitely not leave me with a positive attitude. -
So what do I do? Power up the amp and lay the red/black's of the meter across the same colored speaker posts for each channel?Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
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So what do I do? Power up the amp and lay the red/black's of the meter across the same colored speaker posts for each channel?
Yes without speakers or preamp hooked up and meter set to DC mv scale you touch the probes to the binding posts.Repeat for other channel.Typically it should be less than 50mv or so. -
ok, thanks. i'll update later.Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
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So sorry this happened. I sure hope it never happens on my 1C's. Had to bring the picture to the second page. Too cool to have to go through the hassle of clicking back to the beginning of the thread. :rolleyes:____________________________________________________________
polkaudio Fully Modded SDA SRS 1.2TLs + Dreadnaught, LSiM706c, 4 X Polk Surrounds + 4 X ATMOS, SVS PB13 Ultra X 2, Pass Labs X1, Marantz 7704, Bob Carver Crimson Beauty 350 Tube Mono Blocks, Carver Sunfire Signature Cinema Grande 400x5, ADCOM GFA 7807, Panasonic UB420, Moon 380D DAC, EPSON Pro Cinema 6050 -
So what do you do? Cut it into thin strips and then curl it around the drivers?
Yes. I just installed it a few minutes ago on a MW6511 and it curls around it perfectly. I'm redoing all of the MW's, PR's and tweeters with Armacell and getting rid of the mortite!!! While I'm at it, I'm replacing the threaded wood inserts and installing hurricane nuts on every bolt hole including the tweeters (no more wood screws!!!) My buddy has the 1.2's and the tweeters are bolted in...damn solid). Of course it works great on the crossover plates on the 1.2 TL's as well.SDA SRS 2.3TL's
Silk Audio MS-90-BT integrated tube amp
Yaqin MS-20L integrated tube amp
SDA 2B TL's -
Always amp on last off first.
Thanks! learned something new and have already instructed the wife on proper system power on/off. I'd hate for this to happen to her when I'm at work.:eek:____________________________________________________________
polkaudio Fully Modded SDA SRS 1.2TLs + Dreadnaught, LSiM706c, 4 X Polk Surrounds + 4 X ATMOS, SVS PB13 Ultra X 2, Pass Labs X1, Marantz 7704, Bob Carver Crimson Beauty 350 Tube Mono Blocks, Carver Sunfire Signature Cinema Grande 400x5, ADCOM GFA 7807, Panasonic UB420, Moon 380D DAC, EPSON Pro Cinema 6050 -
Well, things are looking good. Did the dynamat, armacell, and jbweld mods today. So lucky I had a spare set of drivers, although I still need to get replacements. Everything is back together.
I just ran my meter across the Krell. I'm seeing 54 mV DC on the left channel, and 36mv DC on the right. Curiously it was the right speaker that blew.
Ok, getting ready to power everything up. Fingers crossed...Good music, a good source, and good power can make SDA's sing. Tubes make them dance. -
Ok, getting ready to power everything up. Fingers crossed...
Don't forget one of these
... The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD
“When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson -
If it was me I would have bought a cheaper pair of speakers off craigslist to do some testing..
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AND I AM BACK IN BUSINESS!!!! :cool:
Everything working perfectly. Thanks everyone for the advice. A good lesson learned, and I finally motivated on the mods I've been procrastinating. Now that the right speaker is back, I'll do the mods to the left this week.
WHEW!!!!Good music, a good source, and good power can make SDA's sing. Tubes make them dance. -
Congrats!!!
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AND I AM BACK IN BUSINESS!!!! :cool:
Everything working perfectly. Thanks everyone for the advice. A good lesson learned, and I finally motivated on the mods I've been procrastinating. Now that the right speaker is back, I'll do the mods to the left this week.
WHEW!!!!
Cool. Keep a fire extinguisher nearby from now on.SDA SRS 2.3TL's
Silk Audio MS-90-BT integrated tube amp
Yaqin MS-20L integrated tube amp
SDA 2B TL's -
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AND I AM BACK IN BUSINESS!!!!
Glad to see it fixed! Now the real worry is why did it burn in the first place. -
It was covered in these posts.Now the real worry is why did it burn in the first place.My guess is that when he switch on his preamp it sent a DC voltage spike that the amp then sent to the woofers voicecoils,which if high enough in level will destroy them.Being a tube pre it will have DC blocking coupling caps at it's output but if they had insufficient time to charge fully(such as at turn on) or leaky ,DC can be passed to the amp.For this scenario to happen the amp would need to be a directly coupled design,I'm assuming it is.The older repair techs can tell you how often this happens when you mix a tube preamp and a SS power amp.
The output blocking cap on the preamp stage can and will let thru a blip of DC as it charges up upon power up. You get by with it some and then again sometimes not. It's just that much more important to try and remember the correct power up sequence. Mixing a really potent amp like a Krell increases what can be driven into the poor little voice coils. -
Nice too hear you're back in business.
Speakers
Carver Amazing Fronts
CS400i Center
RT800i's Rears
Sub Paradigm Servo 15
Electronics
Conrad Johnson PV-5 pre-amp
Parasound Halo A23
Pioneer 84TXSi AVR
Pioneer 79Avi DVD
Sony CX400 CD changer
Panasonic 42-PX60U Plasma
WMC Win7 32bit HD DVR -
If you cannot find old 10's and 11's i have a couple new style from current polk stock if you want them.
How are the new 10's and 11's? Wondering if I should just buy new ones for the rebuild of the CRS+'s, or do I want to be searching for the originals?Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
