In My X, Poppin tweeters does usually indicate a problem with the amp or signal path. I just sold a set of Cerwin Vega's U321s to a fellow with a 50 watt Amp. He's tripped the breaker on the tweeters several times already, but I had run close to 200 watts into that same set, but from a much higher quality, more powerful amp...and I never tripped them off... But you do seem to know what your on about... I will say that I am very dubious of the claims of many of these so called AVRs... I think many of them are over rated...
I'd be looking at your AVR, that's usually where the problem is.
WDTV Live SMP with WD EX4100 NAS
Polk RTI8 Front, Polk CSI5 Center, Polk RTI4 Surround
MTX SW2 12” SUB, Sharp AQUOS LC-70C6400U
URC-WR7 Universal Remote
Motorola QIP7232 (P2) FIOS DVR, Sony BDP-S590 Blu Ray Player
Marantz SR5010 AVR,Technics SL-B20 Turntable
Yes, I agree on all of the above
and add, we are all at the mercy of what the manufacturer states as a rating
Pioneer's claim on the Elite SC-05 ? they "claim" it uses the ICE class-D amp made by Bang and Olfsen, under the ICE concept and that its output signals are monitored by the Nielsen corrective network, compared to the input signal, and corrected at a 365KHz rate. They also claim that it will output 135 watts per channel with all 7 channels driven at a max of 0.05 thd. now... B&O and Neilsen claim that when the amp is set at safety level 2 it will not allow the amp to output a clipped signal, or a signal that exceeds the 0.05 thd limit. They also "claim " that when it is set at safety level 1, it will detect a clipped signal and convert it to "soft clipping". B&O also "claim" that if the user tries to exceed these safety limits, or safety settings, the Neilsen Corrective network will shut the amp down.
.... but these are all "claims" made by companies that want to sell a product.
Myself, (as I have not actually manufactured any of the involved components) I have to rely somewhat on what I see and read. I read that B&O are well respected Leaders in the arena of manufacturing signal Amp's.... But I also read that Polk makes a quite nice speaker, so this leaves me to judge by what I see. When I took a peak into the Pioneer Elite AVR, I liked what I saw.... everything is laid out in nice and neat config, ample weights used in high power sections, and top grade connections. When I removed all the speakers and looked into one of the Polk Cabinets I saw a nicely built cabinet with decent but somewhat cheapened sectioning, sub-grade wiring, loose push on type connections, some connections had bent the speaker terminals over to near touching opposite polarity.
A fair, but minimal crossover network, and no breaker or fuse for protection. As to the Tweeter's that have burnt out? The involved tweet is a one and a quarter ounce assembly (this weight includes the mount bracket and face plate and all)...... I would guesstimate that around one ounce of the total weight goes to the body moulding and face plate, leaving around one quarter ounce of weight comprising the Magnet, Former, Winding, connections and Dome....... after seeing this and guesstimating at it for a while, I figured it has inadequate winding to dissipate the heat involved in a cabinet that is advertised as recommended amp power of up to 300 watts. Now, that 300 watt is not stated as a limit, rather a recommendation of amp range. ......
anyhow.... if I had access to time travel, I would not purchased the Pioneer Elite, or the Polk speakers... to suit my tastes and wishes, I would go completely different...
but... I am Mindless after all.....
Panasonic SMART VIERA 60" Class GT50 Series Full HD 3D Plasma HDTV/TC-P60GT50
Panasonic 3D Blu Ray DVD player
Pioneer Elite SC-05 AVR
2 x Polk Audio TSX550T front channels/2 x Polk Audio Monitor70 Series II rear channels
1 x Polk Audio CS2 center /2 x Polk Audio PSW505 Subwoofer
XBOX 360 (MindlessCorpse)
Yamaha HTR-6050 + JBL Studio 530 + Studio 520C
As I understand it, the AVR will shunt all frequencies below its subW crossover (typically set at 80Hz) to the subW. All frequencies above that are shunted to the towers, regardless of the tower's crossover frequency. Therefore towers are not a waste over a bookshelf speakers.
When I did the original set-up and ran the MCACC feature, it automatically set the fronts and rears as Large, set like that there is no signal put through the Sub out-put jack.
(at least thats how it works on the Pioneer Elite and newer Marantz models) But if I go into the menu and select the fronts as Large and the rears as small then the receiver puts out a signal through the sub output jack. But again, in this instance I would have to stick with no need for rear towers. Satellite or bookshelf models would be ok as the lower end of the towers are unused. My rears are Polk Audio Monitor 70 Series II. When I check each of them by ear, there is no low frequency being output from the speaker. By low frequency I am estimating around say 750 and under. Most Bookshelf and satellites can handle the range that is being sent to the rear channels.
But, this is only an opinion, and I may be wrong.