Jump to content
The Klipsch Audio Community

PrestonTom

Regulars
  • Content Count

    3717
  • Joined

  • Last visited

Community Reputation

573 Revered

1 Follower

About PrestonTom

  • Rank
    Forum Ultra Veteran

Profile Information

  • Gender
    Not Telling
  • Location
    New England

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. Crossed at 10kHz - you will see very little additional energy at the listener's position. Above 10 kHz there is little energy to begin with (in the recording and playback). BTW, in the 1970s, Infinity did this with their EMIT tweeters on some models. I had some, and noticed zero difference (they had a knob to dial them up or down). Good Luck, -Tom
  2. Perhaps the OP could tell us where he is located. Who knows, maybe a member with the new model(s) might be local?
  3. There is a more appropriate forum for this. Tacking it onto an 18 year old thread will not get you very far. May I suggest posting in the "Garage Sale" forum with a price and several photos
  4. Before you pull the trigger, let me suggest a couple of things. First, on the Klipsch website somewhere there is a list of dealers that stock the heritage line. By all means, listen to them yourself. Second hand opinions on the internet are exactly that ---- second hand opinions. You are the one that needs to live with them. Second, don't shy away from the earlier versions of Cornwalls and Heresys. They frequently come up for sale on CraigsList etc. They will be considerably less expensive. In terms of value (bang for the buck) you might be amazed, truly amazed. BTW, Personally, I don't think the Cornwalls are too big. Besides if you buy a used pair and they don't work out, you can easily sell them for about what you paid. EDIT: My suggestion about used versions does not mean that the (near) current versions are not great sounding. I have not heard them (they have not been around long enough to be in the used market). I imagine they sound great, but those high prices scare me off. Good luck, -Tom
  5. I assume this a sealed cabinet and not ported. I am curious about the weight of the tweeter driver. In my case it would be a JBL 4 inch voice coil version and it is about 35 lb. In your case that EV driver also probably weighs quite a bit. I am leery about mounting it to the K402 without adequate support since I would hate to have the horn's flange self-destruct. Are you going to run some sort of internal shelf across the width of the cabinet? Everything I have sketched out seems rather makeshift and may not hold up if the cabinets were ever moved or tipped. Interesting project, -Tom
  6. Good luck with this project. It looks like you are making good progress. I toyed with the idea myself, but I get nervous about cutting up a K402. My guess is that they will be a bit over 2 ft wide and close to 4 ft tall. Any guess on what they might weigh (I imagine there is substantial bracing inside to carry the various loads)? -Tom
  7. You are under the impression that it is a "drop in" replacement for the KLF 30. Life is seldom that simple. One difference is the the Mumps horn is CD (controlled dispersion where the on-axis and off-axis frequency response is comparable). This has a big effect on the sound quality (usually an improvement in my opinion, if it is done correctly). However the new horn (and perhaps driver) will probably necessitate a change in the crossover. Is this something you would be comfortable doing? Is there someone out there with the competence and experience who has done this before? It is infrequent that simply swapping parts will bring about an improvement. It usually requires a system design approach, IMHO. Yes, I know that is not always a popular opinion on audio forums. Good luck, -Tom
  8. Hey guys, it's okay to turn down the mid-range. My point is that the balancing network is a fundamental piece of the speaker system and a 3dB shift is substantial. If things are that far off, then maybe Klipsch is not the system for you.. There is no "wrong answer". The Klipsch system may have been designed for a different sort of listener. There may be designs that are better designed for your preferences. Perhaps Klipsch is not one of them. Personally, unless you are willing to go to DSP, I think they got it right. Good Luck, -Tom
  9. I have not forgotten. I took some more photos and I will post them. As you can imagine ... things have gotten busy. I have not forgotten.
  10. I agree. I don't think the AA would be considered a constant impedance design. If that is something someone feels the need for, then ALK has some networks that will approximate that goal. IMO, a decent amplifier should be able to deal with changes in impedance (within reason). Although there are some tube amps (not most) that will track the load impedance. Just as a general comment, why are folks wanting to drop the midrange output on the Klipsch balancing network? A 3 dB change is actually a significant difference. I imagine the designer spent some time developing that network. Do you think they got it wrong? Is it possible that the "Klipsch sound" is not your cup of tea? I am not being mean, but there are a ton of speakers out there, you should be able to find one that has a design (components, drivers etc - all working together) that meets an individual's satisfaction. Good Luck, -Tom
  11. Rudy, I am glad you are back at home. It is the best place to be. Good luck and I am happy to hear that things are getting better. -Tom
  12. Dave, this is a most generous offer and I hope someone can give them a loving home. BTW, In my limited experience with these early versions, I did not find them to be fragile. Good luck, -Tom
  13. Those look like IAC wedges, which are made of fiberglass of a specific density etc. There is usually a pole inside them to lend support and the wall-side of the pole has structure which in turn allows it to be snapped into a grid of "J -channel". This grid is attached to the concrete walls, ceiling and floor. The metal wire on the outside of each wedge is called hardware cloth and provides support so the wedges don't droop over time. The IAC chambers I have been involved with had wedges of about 30 inches in depth. This gave anechoic specs down to about 100-125 Hz. Some wedges are made out of a special foam rubber (open cell and I forget the density or porosity). These were frequently used by Eckel Industries and others. The design of these things has changed over the years. Off the top of my head, I can think of over a dozen research labs with large anechoic chambers. As a fun fact: the wedges themselves are fairly expensive (and there are hundreds of them). So when a chamber is torn down (as what happened at MIT), they actually strip out the old wedges and re-use them in another build.
  14. Since this is listed in Alerts and NOT Garage Sale, I will comment. Where did this price come from?. Yes, I understand the DSP is included and there is some veneer added. Still ..... I don't get it. However, I will say that it is nice that a dealer is assembling a package that is pretty close to plug and play. It is also refreshing to see an honest assessment about what might be involved if the buyer tries to change them from their "stock" form
  15. Although I am not Roy, I can address some of the points raised above. No need to worry about the dust. It will have a negligible effect. However there is a concern about whether the wedges have mold or mildew on them. It is infrequent, but can be a real headache. In many chambers, the aluminum grating only covers a portion of the floor and is frequently removable (2x 4 ft grates resting of pillars anchored to the concert floor that is many feet below). The alternative a suspended steel cable floor (which needs to re-tensioned periodically over the years). Even with the grating in place (not even covered), the impact on the measure may be minimal (depends on location and what portion of the spectrum you are interested in). Many chambers are only semi-anechoic and have a concert floor so you can drive heavy equipment or vehicles inside. There are different designs on doors. Some are actually filled with sand and have very exotic rubber seals/gaskets. Remember that anechoic chambers need to be relatively "sound proofed" also. This is always a problem area since have doors need a substantial structure to support them (it is not just a couple of hinges). Unfortunately the more structure means the more reflective surfaces. Over the years, the two major players in the industry were IAC (industrial acoustics corp) and Eckel Industries. The one in the pictures above looks very much like an IAC chamber. Good luck, -Tom
×
×
  • Create New...