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yeh right 🤣 I got 6 pair of those tweeters with holes right here not a single one burnt! you guys have absolutely no proof except from an ad from a 1970 magazine. Seems you guys will believe anything 🤣

I posted a picture, post a picture prove me wrong. Remember a picture is worth a 1000 words.

We know for a fact that polk used a soldering iron to make the hole. It was a Polk engineer who belonged to the forum years ago that in fact confirmed it.

F1nut wrote: »

Nope, it's a fact that Polk did it.

You ever burnt a hole in your tweeter? don't start making up stuff show us picture of you burning a hole in a tweeter 🤣🤣 Why don't you try it first before recommending someone else does it? Terrible!!

@Viking64 Tank you

@xschop That ad was a 1970s word salad 🤣🤣

DeRod wrote: »

100% agree that hole was most likely punched by Peerless for the Polk tweeters.

I understand the size of the vent/port effects the bass but there isn't any pressure being generated under that little dome and how would that effect the treble? The dome is just basically a piece of cloth covering the tweeter

There actually is. There are many tweeters that have vented pole pieces, either to the interior of the speaker enclosure or to an enlarged chamber with damping materials added. This lowers the resonant frequency of the tweeter and allows it to play lower, more cleanly. Polk chose to vent to the front. There is a white disk of pretty dense felt under the dome stuck on top of the pole piece to help dampen out resonance in the Peerless. Rob has experimented with adding bored out pole piece and back chambers with lambswool, not to the Peerless, but to other tweeters with good results.

There are pretty early multi page informational advertisements in the magazines where Polk mentions that they precision aligned the voice coils in the tweeters through an alignment jig of some sort. So, it is very possible that they removed the dome/bezel/voice coil as an assembly in order to punch the hole and then reassembled and precision aligned the voice coil in the gap. Wouldn't surprise me, put it that way.

Nope, it's a fact that Polk did it.

100% agree that hole was most likely punched by Peerless for the Polk tweeters.

I understand the size of the vent/port effects the bass but there isn't any pressure being generated under that little dome and how would that effect the treble? The dome is just basically a piece of cloth covering the tweeter

Polk certainly claimed (suggested?) that it did in the early brochure: "The dome is vented (aperture tuned) in much the same way that woofer systems are tuned to further smooth out its response curve and improve transient response and power handling"

Looks too perfect to me too. I wouldn't be surprised if there was some truth to it in the respect that in early experimentation that may be how they did it. Then maybe (?) they may have had it done by Peerless just prior to assembly after the doping had cured, using a punch and die in a jig. At least that is probably the way I would've done it. That would mean that Peerless would've done it for them and only them.

The story goes that Polk burned the hole with a soldering iron. They certainly did it pretty darn precisely considering the method, if so. It would be awesome to test those Denmark made ones for sure. Both Dats VIII testing and listening tests. I have some Peerless that Ohm out at less than 7 Ohms. The visual variances in these tweeters is off the charts, especially the back plates. I haven't tried to count how many different ones there are but it is a lot. These Danish made silk domes look to have a different doping, possibly, compared to all the ones I have which are most likely all USA made.