Blew my lsi15 tweeter & crossover-how????
Comments
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don't forget.. the user is outputing the -28dB from the receiver pre-amp outputs.... The-28dB is relative to the receiver amps, not the external amplifier... If the Emotiva has a high input sensitivity, the amp might be providing more power than he expects.... In that case, he probably is outputting a LOT more power, even to the point of clipping which also can destroy the crossover/tweeters....
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Wow awesome info, but laymens explaination please.don't forget.. the user is outputing the -28dB from the receiver pre-amp outputs.... The-28dB is relative to the receiver amps, not the external amplifier... If the Emotiva has a high input sensitivity, the amp might be providing more power than he expects.... In that case, he probably is outputting a LOT more power, even to the point of clipping which also can destroy the crossover/tweeters....LIVING ROOM:Pioneer PDP-6070HD, Pioneer Elite SC-25, Pioneer Elite BDP-05FD,
Emotiva XPA-5, Emotiva USP-1, Polk LSI15's, Polk LSiC, Velodyne 12", Mirage Nanosat Prestige rears, MIT AVT Speaker Cables, Audioquest King Cobra Interconnects, Panamax M5300pm Surge Protection/ Power ConditioningBEDROOM: VIZIO 32" LCD, Pioneer Elite VSX-23txh, Pioneer Elite BDP-23FD, Parasound HCA-2205A, Mirage Nanosat Prestige Speakers 5.1, Mirage S8 Sub, Monoprice cables, APC Surge Protection. -
angelsfann02 wrote: »Wow awesome info, but laymens explaination please.
Turn it down!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 -
Turn it down!
True! :eek: Look at it this way, think of connecting a 100 watt amp and a 1,000 watt amp to the same line level signal. The 1,000 watt amp is going to amplify that signal 10 times more than the 100 watt amp. The setting on the receiver/line level signal is the same, but much different loads being presented to the speakers. There are a lot more variables based on the voltage output of the pre amp, sensitivity of the inputs on the amplifier that determine the output level, but this is the basic explanation.
Does that make sense?
The amp in your Pioneer is capable of 110 watts per channel into 8 ohms in the best case scenario. I am not sure of its 4 ohm capability...
The Emotiva XPA-5 can drive 200 watts per channel into 8 ohms, and 300 watts per channel into 4 ohms. The LSi15 is a 4 ohm speaker. BIG difference in power. Depending on the Voltage output of the Pioneer, you could have been driving the Emotiva into clipping and past the capabilities of the LSi15. I doubt it, but it is certainly possible depending on the cirumstances.
Again, there are many variables, and I don't know the voltage output of the pioneer or the sensitivity of the Emotiva, but it is entirely possible the amp was clipping, or you were overdriving your LSi15...
Just my thoughts,
DonLiving Room: Adcom GFP-750 (Upgraded), Squeezebox Touch, Oppo BDP-83, Pioneer DV-79AVi, Parasound HCA-3500 (Upgraded), SDA SRS 2 P/B (Gimpod, Sonicaps, & Mills)
Theater: Denon 4311ci, Oppo BDP-93, Parasound HCA-2205+HCA-2200II, Polk LSi9, LSiC, LSiFX, LSi7, Custom 18" TC Sounds sub with 2 18" PR, Sharp XV-Z12000, Pioneer Kuro KRP-500M (isf Enabled)
Bedroom: HK AVR354, Pioneer DV-47a, Parasound HCA-1500a, Polk LSi9 -
dcmartinpc wrote: »True! :eek: Look at it this way, think of connecting a 100 watt amp and a 1,000 watt amp to the same line level signal. The 1,000 watt amp is going to amplify that signal 10 times more than the 100 watt amp. The setting on the receiver/line level signal is the same, but much different loads being presented to the speakers. There are a lot more variables based on the voltage output of the pre amp, sensitivity of the inputs on the amplifier that determine the output level, but this is the basic explanation.
Does that make sense?
The amp in your Pioneer is capable of 110 watts per channel into 8 ohms in the best case scenario. I am not sure of its 4 ohm capability...
The Emotiva XPA-5 can drive 200 watts per channel into 8 ohms, and 300 watts per channel into 4 ohms. The LSi15 is a 4 ohm speaker. BIG difference in power. Depending on the Voltage output of the Pioneer, you could have been driving the Emotiva into clipping and past the capabilities of the LSi15. I doubt it, but it is certainly possible depending on the cirumstances.
Again, there are many variables, and I don't know the voltage output of the pioneer or the sensitivity of the Emotiva, but it is entirely possible the amp was clipping, or you were overdriving your LSi15...
Just my thoughts,
Don
Congratulations sir, I am very impressed, AND, now I want to find the answers to the questions of voltage output of the Pio & sensitivity of the Emo. Im obsessed!!!LIVING ROOM:Pioneer PDP-6070HD, Pioneer Elite SC-25, Pioneer Elite BDP-05FD,
Emotiva XPA-5, Emotiva USP-1, Polk LSI15's, Polk LSiC, Velodyne 12", Mirage Nanosat Prestige rears, MIT AVT Speaker Cables, Audioquest King Cobra Interconnects, Panamax M5300pm Surge Protection/ Power ConditioningBEDROOM: VIZIO 32" LCD, Pioneer Elite VSX-23txh, Pioneer Elite BDP-23FD, Parasound HCA-2205A, Mirage Nanosat Prestige Speakers 5.1, Mirage S8 Sub, Monoprice cables, APC Surge Protection. -
embrace the horror, you clipped the amp. it happens to the best of us
gotta check your set up and see why that is happening, if your tone controls for bass and treble are jacked up, thats a great place to start. The XPA Emo amps seem to be pretty stout, so I have a sneaky suspicion the problem is somewhere in the receiver.
I pound all of my LSi's with 500 watts per channel, I assure you, overpowering is not a problem is the power and signal is clean.
On that note, do the crossover upgrade. I had Trey do my LSi9's and oh my sweet jesus did it make a difference. In the interests of disclosure, I did go balls to the wall on components though.
did you test the tweeter straight to the amp to see if it works? (do this at VERY low volume)Living Room 2 Channel -
Wiim Ultra. Jolida CD player. Fiio k11 R2R DAC, XTZ as300 Edge amp. Focal Cobalt 826 towers,
Upstairs 2 Channel Rig -
Classe Audio 5 Preamp, DIY1200as2 Icepower Amp x 2, Wiim pro streamer and Topping E70 Velvet DAC, California Audio Labs DX1 CD player, Polk LSi15's with MM840 woofer upgrade.
Studio Rig - Scarlett 18i20(Gen3) DAW, Schitt Saga 2 preamp, Topping a90 headphone amp, Mac Mini, Audiophonics Hypex NC252m amp, Polk r200's -
angelsfann02 wrote: »I was listening to music at about -28dbs ( Pioneer Elite VSX-23 & Emotiva XPA5) for about 20 minutes, one of my lsi15's sounded differently. Upon inspection found tweeter toasted & crossover torched. Other 3 drivers seem fine. I know I will be calling Polk C.S in the morning, but I am baffled that this happened. I have listened to music this loud before for longer periods of time.....please feel free to chime in so I won't have this issue again in the future. I plan to listen at lower levels, but I thought LSI's could take it.
Hi,I have the Elite 74TXVI-S and -28 db is not that loud.I have Monitor 70's and I've played music as loud as -16db,with no problem.
Were you playing cd's and the high-gain light was blinking on the Elite?.....The high-gain can definately fry your speakers.Peter -
The receiver was set-up using the mcacc feature. Using the mic to manually set-up the speakers. BUT when listening to 2 channel audio I have my PIO VSX23thx set on stereo. From there I can choose: Reg. Stereo, FFS Focus, or FFS wide. the Pio also has a stream direct mode and pure direct mode. These last 2 don't sound too good using my ipod. Should I go into the system and figure out how to lower the treble, or maybe just look for a another pre, maybe one that doesn't have built-in amplification?LIVING ROOM:Pioneer PDP-6070HD, Pioneer Elite SC-25, Pioneer Elite BDP-05FD,
Emotiva XPA-5, Emotiva USP-1, Polk LSI15's, Polk LSiC, Velodyne 12", Mirage Nanosat Prestige rears, MIT AVT Speaker Cables, Audioquest King Cobra Interconnects, Panamax M5300pm Surge Protection/ Power ConditioningBEDROOM: VIZIO 32" LCD, Pioneer Elite VSX-23txh, Pioneer Elite BDP-23FD, Parasound HCA-2205A, Mirage Nanosat Prestige Speakers 5.1, Mirage S8 Sub, Monoprice cables, APC Surge Protection. -
angelsfann02 wrote: »:frown: here is a pic of the xoverembrace the horror, you clipped the amp. it happens to the best of us
gotta check your set up and see why that is happening, if your tone controls for bass and treble are jacked up, thats a great place to start. The XPA Emo amps seem to be pretty stout, so I have a sneaky suspicion the problem is somewhere in the receiver.
I pound all of my LSi's with 500 watts per channel, I assure you, overpowering is not a problem is the power and signal is clean.
On that note, do the crossover upgrade. I had Trey do my LSi9's and oh my sweet jesus did it make a difference. In the interests of disclosure, I did go balls to the wall on components though.
did you test the tweeter straight to the amp to see if it works? (do this at VERY low volume)
whats trey's polk handle?LIVING ROOM:Pioneer PDP-6070HD, Pioneer Elite SC-25, Pioneer Elite BDP-05FD,
Emotiva XPA-5, Emotiva USP-1, Polk LSI15's, Polk LSiC, Velodyne 12", Mirage Nanosat Prestige rears, MIT AVT Speaker Cables, Audioquest King Cobra Interconnects, Panamax M5300pm Surge Protection/ Power ConditioningBEDROOM: VIZIO 32" LCD, Pioneer Elite VSX-23txh, Pioneer Elite BDP-23FD, Parasound HCA-2205A, Mirage Nanosat Prestige Speakers 5.1, Mirage S8 Sub, Monoprice cables, APC Surge Protection. -
These last 2 don't sound too good using my ipod.
There's another probable issue. Get a CD player.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 -
Digital Multimeter
