BeFuddledinMn

Cleaning out some of the collection I have a nice k-55 M midrange driver with leads for sale. DCR: 10.2 $80 plus shipping. Thank you. SOLD

I have a nice pair of k-77m tweeters for sale. This is a nice pair with original leads. DCR measurement: 1) 6.4 2) 5.3 Price is $150 plus shipping. Thank you.

Sold. Cleaning out more spare parts. I have a pair if original Klipsch k61 tractrix horns and drivers for sale. Excellent working condition without any horn damage. $150 plus $20 shipping. Thank you.

Bump

Bump.

SOLD. THANK YOU

Nice set of Alnico k-77’s, matched pair with close serial numbers. Excellent working and cosmetic condition with original Klipsch network wires. DCR ohm readings are 5.7 and 6.1 with diaphragms believed to be original. I’ve had these in storage for many years as “keepers” but at this point, I’ll never use them. $150 for the pair plus $25 shipping in US. Thank you.

Bump

Bump

Still available.

Still available.

Great job Dave and thank you and Claude for sharing and educating the forum on the possibilities available. After following your efforts here on the impressive Super MWM design, and Claude’s impressive Quarter Pie design, I’ve noticed that both designs could be cost efficiently built using 5’x5’ Baltic birch sheets for the same 60”x60” x 21” footprint (Super MWM vs Super Quarter Pie). I have been seriously considering building Claude’s Super Quarter Pie, but given the same dimensions and materials, if someone had the room for that 60”x60”x21” footprint, which one should they build? Obviously, the Super MWM goes lower, but are there advantages to both in the same footprint?

Always brilliant, eloquent, knowledgeable and a gentleman. God bless. Thoughts and prayers go out for Gil’s recovery.

Dean is correct and rather than running in circles comparing apples and oranges, there’s a lot of past research and analysis available on this forum answering most of the questions in this thread. As far as the thread goes, there are two different quick tricks on the cheap to get the aa to “live curve” more like an a/4500, otherwise you may as well start from scratch, selecting your tweeter and midrange before your network. Just my experience after owning, building and live test curving a lot of networks, tweeters, mids, etc.

Yes, and that the AA tweeter filter is near full power at approx 5000hz, not 6000hz.

There is also another option to move toward a 4500hz crossover point already done by Klipsch on the aa network: for a short time, Klipsch employed a revised aa network that inserted a .35mh inductor in the positive output after the autoformer to the squawker as a band pass filter. I’ve never measured this one, but Klipsch used it and must have found it helpful in achieving a ~5000hz crossover (published or not) with the aa tweeter filter. Again, FWIW In terms of network differences, I think Dean has it right; Klipsch was all over the road on midrange attenuation (from 3,4 and 6db down) for many years with the LaScala while maintains a 6000hz crossover point and 105db sensitivity. Voicing differences? Sure, but which is “better” is all personal taste and room dynamics imho.

One alternative may be to incorporate the old notch filer idea on the “aa” network. Measurements from ALK years ago demonstrated that the aa tweeter filter was “all in” at 5000hz, not 6000hz, albeit with a 1 or 2db output reduction from an “a” network. The old Max Potter notch filter, with 3uf capacitor and .1mh inductor, wired in parallel on the positive side of the midrange - after the autoformer, will alleviate the 8-9k midrange spike on the single plug k56 AND reduce the total midrange db output by about -1db from perhaps 2-3k onward. With a first order mid, this should generate an approximate acoustical crossover at ~ 5k. This may deliver a middle ground acoustical cross between an a/4500 (which suppresses the midrange 1-3 db further and through a greater range) and the “aa”, and without a tweeter change. Can you hear a change? Maybe. FWIW.

Still available.

Still available, lower price. $125, plus shipping.

Still available.

SOLD

Just one left. $50 plus shipping.

I have a matched pair of Alnico k-77 tweeters for sale. Serial numbers pretty close to each other and I believe were installed in a LaScala together. They measure 5.3 and 5.9 ohms on the meter and may be the original diaphragms, or older original replacements. Sound good, with original Klipsch wires. Nice condition with slight oxidation on the magnet cases. SOLD

PM sent.

I always appreciated Dennis (RIP), his stellar contributions to this forum, and his effortless intellect. His LaScala mod (and associated tutorial) was and is brilliant in my opinion. Of course, like all of the possibilities with speakers, unique needs usually dictate best course. Having said that, I’d love to see full frequency response and distortion measurements across a Klipsch LS5 LaScala, a DJK modified LaScala and Claude’s impressive quarter pie. We can all add a subwoofer later - or buy the new Klipsch Jubilee, but I’m guessing there is a sizeable crowd that doesn’t find that convenient, for whatever reason.