Khornukopia

Great combination. Insulated door is worth the cost, for quiet door travel, garage music quality and room temperature control.

Hope to see more pictures of your fine work.

I am interested in the brackets. PM sent.

They might sound similar, but... The 4670D will make you a cool dude on the JBL forum (if there is one). The KPT 904 will earn you respect on the Klipsch forum. There is no comparison.

I have some speakers using 35 year old K-77 tweeters with NO protection circuit. Never had a problem. If I ever do burn a K-77, will just replace the pair with Crites tweeters which should last even longer.

Bob Crites recently pointed out on another thread that his tweeter driver has different performance specs, even though the tweeter drivers look similar.

The paint texture in your picture looks just like the paint on my factory painted Klipsch La Scala Industrial version.

Looking good.

The pictures gallery appears to be back to normal.

Nice looking repair job.

That original tailboard with the serial number stamped into it might be glued and stapled to the cabinet. Removing it could cause peripheral damage. Plugging it may not be perfect, but would retain more of the original structure.

This amp looks different than your previous DIY M2. How does it compare?

All the tiny holes in acoustic ceiling tiles are an important aspect of their design, so reading the details about SoundPly micro-perf is interesting.

Where would I use an all pass filter?

Then inversely, one could apply a steep slope to the horn loaded bass driver and a shallow slope to the tweeter to time align the loudspeaker?

You could list them on this forum's Garage Sale section.

Using a two way bi-amp system for example, crossed over at 500 Hz, both slopes at 6 db/octave and the drivers time aligned, what happens if I change just the high pass filter to 48 db/octave? Did I introduce a one wavelength delay to the tweeter signal, the equivalent of physically moving the tweeter backwards 2.26 ft.?

Impressive for their compact size.

That pair of Chorus II look to be in nice condition.

The answer to your main question is yes, and your second choice is also a good one, but you might consider expanding your search to include other units that have a better connection for your iPod, such as USB input, or Air Play if wireless convenience is important.

Chris, If I may quote you here, "Whenever you use higher order (steeper) crossover filters, the time delay for the higher frequency channel has to be increased by 1/4 wavelength for every order of filter used (i.e., 6, 12, 24, 36, 48 dB/octave filters each need, respectively, 0, -1/4 wavelength, -1/2 wavelength, --3/4 wavelength, -1 wavelength) in addition to the delay needs to physically align the acoustic center of the drivers." So, if I change a crossover slope, then I need to re-calibrate the time delay between the affected drivers? That would explain why my time delay settings are not consistent with the physical lengths. This is very helpful to my understanding of time delay settings.

Please let us know how those sound on your big horns.

I have several hundred pounds of Roxul installed in my home theater as 24 X 24 X 48 bass traps. It works. The mineral wool batts are fairly easy to cut with a long serrated blade knife if you need to make smaller shapes. Other sound absorption or diffusion products have their purposes. The SoundPly micro-perf panels are a very interesting design. https://www.soundply.com/rf-series/ I first learned about them a few months ago, while I was researching pre-finished wood veneer wall panels. I have not seen or heard any SoundPly yet, and imagine they are pricey, but hope to see an installation in a fancy concert hall somewhere.

Those should be classified as Upper Class D.

Your house looks good.