Endo

@PrestonTom Yep. I think you missed it--I mentioned it in the first line of OP.

Perhaps worth mentioning: another method for cutting circular openings, (as long as they aren't too big)... It requires a drill press--and I realize not everybody has one--but for those who do, it might be an option to consider . I've used jig saws, routers and this drill press cutter--and this is my preferred method; especially when I want a clean, sharp edge (in natural veneer, with minimal to no tear-out). Your results may vary, depending on what the wood grain is doing. I have found the chisel tip of the cutter to leave a very nice, finished edge, similar to a quality forstner bit. This particular model cuts as large as about 4 3/8" inches (have used it in the past for oddball sized driver openings). A nice advantage: the cutter slides in its mount for tweaking to any size circle (within range, of course). The holes I've made with this are clean, and don't require any clean-up or sanding. I have been following this thread with an interest in modifying my own pair super heresy's. Many thanks to @ClaudeJ1 for sharing! ... I appreciate how much time and effort must have gone into figuring all of this out.

I want to hear a pair of these. Very curious about what's inside. Thought it might be nice to have the CL images posted here, for future reference.

On Nov. 10, 2017: This same reviewer posted a YouTube video, sincerely asking the question: Do high sensitivity speakers sound better at louder volumes than low sensitivity speakers played at the same volume, given adequate power... ?? (He wasn't just doing this for the camera; he actually did not know). Nobody gets it right all the time, but this is embarr•••ing. Moreover, his "favorite all-around speakers"? Magnapan .7s; with freq. response 45k–22kHz and sensitivity of 86dB/2.83v... ? Would these, then, be "audiophile", I wonder? (whatever that means). And why? "Who is this, that darkens counsel by words without knowledge?" –JOB 38; Anybody else see the irony?... His words about the Heresy are, uh... heretical.

Denver CL https://denver.craigslist.org/ele/d/klipsch-kpt-904-cinema/6596023310.html $?! nice...

^Thank you. Appreciate the feedback.

Simply curious. How might this sound? Would like to compare--but don't want to destroy anything by doing something stupid. Is this in-series, or parallel? Seems like series. I'm no electronics expert, by any stretch--just a music lover. Have been trying to educate myself--but I still don't understand it. Found these diagrams and they got me to thinking something like this might be possible...

I have run this question past two very knowledgeable forum members/amp builders, and cannot resist the temptation to post it at-large, in the hopes that someone may have relevant experience and/or knowledge. This may be a crazy idea, ... but, in the spirit of exploration, here goes: •What happens when the two channels from a stereo amp--each carrying identical inputs--are run in series (as a single signal)? For instance, are the Ohms additive? Do a pair of 4 Ohm outputs combine into a usable 8 Ohms? What is the worst that can happen? For clarification, please see attached picture...

^Yes, what he said. PWK once remarked--"Miniaturized bass speakers have been attempted but so far no one has invented a miniature 32-foot wave length." Hence, the impressive scale of Klipsch horn-loaded bass bins. Physics won't be cheated.

^^ Beautiful. Very, nice. Can't tell if the first image is Forte or Chorus, but... plane-sliced birch, yes? This raises an interesting point: The fact that Baltic Birch is rotary cut veneer may be part of the reason behind its finishing characteristics. [For those unfamiliar, plane-sliced veneer is removed from the log like taking pages from a book; while rotary-cut (faster/cheaper) is like removing paper towels from a roll]. I have always found Baltic Birch to come from the factory with more of a fuzzy/softer face than cabinet grade, North American veneers--I suspect this has something to do with the way it finishes out. I do love working with Baltic Birch, good stuff; but, its not plane-sliced. EDIT: I just went back and read the original post... Ah'hem... yeah, don't do that. Big no-no. Do NOT try using lacquer inside the house. Do not even use it outside the house near an open door or window. Well-ventilated shop, or possibly outdoors, in the right circumstance. Lacquer has its downsides--but, it its benefits might be a good option for some. Before the piano industry started "dipping" everything in polyester--the standard finish was lacquer: whether it was a Hamburg Steinway or a Japanese Yamaha, they lacquered 'em--and it worked well. The Japanese, especially so; they've been lacquering to good effect for a thousand years. Its a proven finish capable of durability.

^^ Good points. Bear in mind that Baltic birch ply will not respond to finishes like a typical hardwood--hence the OP. Its good to know your options. As an aside: The grain on birch ply will "pop" (raise) after wetting of the first coat: If/when you sand--you're sanding due to the raised grain beneath the finish, not the finish itself.

[EDIT: lacquer continues to be among my favorite finishes for Baltic Birch, in particular--but NEVER use it indoors; my initial post completely missed this part of the original post. My apologies. ] Two things jumped out at me in your question: 1. Natural finish; and 2. Baltic Birch... Yes, agree completely about particular difficulties presented in staining baltic birch (splotchy, uneven). Clear, water-based urethane can help; and waxes, too, can be good. By far the best thing I have found for natural finish on Baltic-birch ply: Lacquer. Brush it on--or spray it (but, it brushes on very nicely). No need to prep with a "stain conditioner" first: Just sand to 150, or better, and apply. Another benefit I have found is that it typically self-levels so quickly--that the brush marks almost disappear completely--I find brushing on lacquer often looks like it was sprayed... very nice. Also, the stuff dries quickly and is easy-peasy to work with. Will not substantially alter the color of the birch (won't yellow like oil-based products; --similar in this respect to water based urethane). The cans says no sanding between coats... ? you decide.

Just saw this... https://denver.craigslist.org/ele/d/klipsch-cornwall-grill/6477057832.html

That's great! Had a similar awakening, recently, after decades of drinking nothing but slurry... One forgets what clean water tastes like. Drink deep. Thank you, PWK.

I am interested. Price?