Khornukopia

70th Anniversary Klipschorn on display at CES.

Ok, thanks for the guidance. Wow, these improvements to my overall sound are making me want to stay home even more, but I must exercise moderation in all my favorite activities! Here is a picture of my listening room that I posted on another thread last year, for any viewers who had not seen it there.

The digital crossover makes this almost too easy.

I opened my DC One editor and applied the settings recommended in the Cello Palette thread. As I understand the instructions, boost and/or cut is adjusted as desired based on personal listening tests, or has someone already suggested re-EQ guidelines to compensate for typical "improperly mastered pop commercial recordings"?

I care, and I enjoyed reading your explanations.

Sad news. Rest in Peace, DaddyDee

This amp works very well for my system, and by displacing a stack of 2 channel amps, allowed me to clear out a bunch of power cords.

My new amp was intended for multi channel surround power, but after listening to several different speakers during its test run period, I realized that this good, clean sounding 9 channel amp is ideal for powering my tri-amped Khorns and tri-amped La Scala.

​ Chris, It is interesting to read about the corrections your are making to music recordings. I will need to try that someday, but how do you adjust for streaming music like XM radio, Pandora, etc.?

DavidH, Glad to read that you enjoy your speakers. Do you have any pictures to share?

The RTA image on the left is of a 440 Hz test tone. The image on the right is of the sound produced by a piano when pressing the 440 Hz A-4 key. This visual display showing the overtones of a single note from a single musical instrument helps me understand why everything more complex than a test tone sounds better through a properly configured tri-amp system.

You have my vote.

This is a better acoustic example, front row center at The Nutcracker Ballet with 30+ musicians performing Tchaikovsky's music in the orchestra pit directly in front of me.

Interesting thread. Now I need to go back to page one and start reading all the links.

I recently read someone's comment about equalizing their frequency response to being "flat" but the sound being sterile or weak. I can't relocate the specific thread to reply, so I will write here that we want the speakers to have a relatively flat response with a Test Tone, but not a flat music playback response. The attached picture is a snapshot of a hand held RTA display during an excellent sounding live music moment. Any other snapshot will be different and unique for that specific instant, but the green line, momentary average curve of this example is a good guideline for a desirable live music reproduction response at your listening position.

My factory stock Heresy III's sound really good.

I have Cornwall IIs and Heresy IIIs and recommend the Heresy III with a GOOD subwoofer(s), because that combo will have deeper bass response, may fit your space better and will utilize the dedicated sub channel in home theater mode (and for the reasons mentioned by Ski Bum). In a different room I might suggest the Cornwalls without subs for 2 channel music because they will sound very good, and may be less expensive (GOOD subs = $$$). If using high quality subwoofer(s) with either Heresy's or Cornwalls, then it is just a matter of what looks good to you, fits in your space, and meets your budget. I emphasize GOOD subwoofer because an inferior sub will degrade the sound quality of any speaker system. (pictured; Heresy III, Klipsch KW-120, Cornwall II)

The collection of ticket stubs from this year's live music events is to remind me that Klipsch speakers are a really good deal, especially for reproducing that "front row center" sound at home.

Fabric covered Roxul mineral wool (or other noise reduction material like fiberglass or denim insulation) will have an effect on the entire audio spectrum. Roxul covered with a thin rubber, plastic or wood veneer membrane will absorb low frequency vibrations while the membrane is reflecting the higher frequencies. Your drywall covered insulation should impart some bass trapping at very low frequencies, but effective bass traps are not separated by a rigid barrier. Also, at this stage of your project, keep in mind that a completely drywall finished room interior will be highly reflective, a leading cause of complaints about horns sounding shrill. It would be interesting if you were to set up a pair of loudspeakers in your room under construction and listen to the change as you install each sheet of drywall.

The silent treatment is one of the most important aspects of my listening room's sound quality. I use Roxul mineral wool in my walls and bass traps.

If I was building a listening room like yours, I might consider using the drywall-green glue-drywall on the outside of the studs, fill the spaces between studs with Roxul Safe-n-sound, cover some areas of the inside wall with Fire Code rated acoustic fabric (at less cost than commercial whispertone wallboard) and some areas with single layer drywall. Your local building codes supercede my suggestions, but if you can do it, my idea turns your walls into bass traps, allowing you to have more even bass response throughout the room with fewer subwoofers. As for the a/c duct, the flexible duct tubing pre-wrapped in fiberglass is probably the best fit for your application.

On your other thread, you mention wanting to use acoustic wallboard, which will be better for the sound inside the listening room, but now you describe using double thickness drywall inside and outside the studs, which will be better for reducing sound outside of the room. If your goal is sound containment, your overhead heating and a/c ducting needs to be insulated and isolated so it doesn't carry sound through the whole house.

Installing Roxul Safe-n-Sound mineral wool into your walls is a good idea, it will improve your bass response, as well as reducing noise transmission to the rest of the house. I use it inside my walls and to build corner bass traps.

When I was veneering my single La Scala bass bin, I also took an old cabinet with leather wrapped columns, then saw cut it to size, and made new face panels finished with the same veneer as the La Scala. The mid-horn and tweeter motorboard is removable, so I can experiment with other horns and drivers fairly easily.

I tend to agree with mustang guy's thought about the HK. I suspect that something in the interconnect wires and or the circuitry of the Acurus is causing a phase shift in the signal. It could be an intentional design to make things sound bigger, so if you like it, then enjoy it.