Dave A

Moray let me try to explain it like this. A direct smaller connection will have a smaller volume of air to deal with. Air is compressible and therefore my thought is larger volume with the whole speaker interior to cushion the effect of sound waves, reducing compression so to speak, would not yield the same compressive transfer of energy to the passive as a controlled direct square pipe between the two would. The answer is something not addressed yet and it is will this work and does it make sense or no it will not work and here is why. Yes I get the idea of volume for bass but is there a way around that is the question I am trying to ask. I am figuring to some degree sound is like air. Blow it into a box and yes it will hit the other side and every other part to. I blow that air into a sealed chamber between two points it goes from point A to point B and does not fool around with dissipating its energy. I don't know how to explain what I mean better than that. Listening to how directional the sound output from my La Scalas are tells me that sound can be directed and channeled. Horn designs have an angle of sound coverage. So to my mind without technical training in this field shape can improve sound wave transmission.

I have a re-coned K-1001-K Quartet woofer and a re-cone kit for the same. I am tired of fooling around with trying to sell it on EBay and figure if I am going to give it away it should be done here. So pick up the price of shipping and I will send these to the first respondent. Thus ends my sojourn into the world of re-coning.

I had a quote recently for K-42 and they were $194 each plus shipping. I want to say a number I heard recently for Klipsch direct k-43 was around $224.00. I ended up buying Eminence woofers recommended elsewhere on the forum as a replacement for the K42 for $124.00.

OK maybe sealed chamber would be better as a description. I can still take and recreate the volume of the, lets say a Forte, and make the cubic feet inside the chamber the same as the open area inside the Forte. What my question really is does a a contained "stiff" column of air offer any improvement over a box with air which would I assume act to some degree as a shock absorber and be subject to potential interference from mid range sound waves freely roaming in the same area? That is an interesting site John. Do you suppose that plastic tubes would be a violation of sonic purity construction methods

OK a picture is worth a thousand words and here is what I mean. A sealed chamber from front to back and side to side. Besides adding stiffness does this accomplish anything? I ponder improvements and recognize the genius of Klipsch. Someone will come up with the exact perfect acoustic variables some day I suppose but are we there now? I go back to everything is a compromise in manufacturing and what we can do today as individuals does not depend on some CPA penny squeezer cutting corners. I am interested in utilitarian solutions and wonder if this plenum idea would work.

Hi John, JAMS? When I last spoke to him he was moving, too busy and recommended the guy who is sitting on my money and K-42 core. Since re-coning is turning out to be such a chore and results not optimal I have ordered two sets of Eminence woofers. By the time the dust settles I have something right away, price is at worst no higher and in this case cheaper. Mailing two ways and then paying the East Nashville dude would end up running me about $135.00 and the new Eminence I went with is $125.00 each. I would prefer getting the original K-42's re-coned but I have no good answer yet.

Catching up and these replies are not encouraging. If I am not going to get factory specs with the re-cone kit I might as well buy new Eminence woofers. By the time I pay the re-cone dude in Nashville for incorrect parts I am over two thirds of the way to new. Actually in the case of 15" K33 woofer replacements I am money ahead by buying direct from Eminence. Surely there is a better answer.

OK I find I have a need for five K-42 woofers. Klipsch quotes for retail customers is $194.80 each plus shipping. The Eminence Delta Pro Eminence Delta Pro 12-450-4 4 ohm speaker. The Eminence Delta Pro 12-450-4 is a 12" 4 ohm speaker. The Delta Pro-12-450-4 speakers available here. is $109 each plus shipping. Is there any reason not to use the Eminence? If I were to get these old K-42's re coned does anyone have an outfit they use that can restore to exact factory Klipsch specs?

Please check your mail.

Question for you experienced speaker fixer uppers. I had a K-43 re-coned here in Nashville a while back. It was supposed to be an exact duplicate of the factory specs. I recently ordered a re-cone kit for a K-10-K from Simply Speakers and it had a lower Db rating by about 1.5 if I remember right then the factory original. They said it was their K-10-K re-cone kit but it was different than factory specs. This re-cone guy orders kits too and the K43 he re-coned now requires the balance adjusted to favor it since it appears to need more watts to drive it. No wonder he said both should be done to make the sound equal. Now you know the back round my question is where does one go to get exact factory spec re-cone work done preferably close to Nashville? Coulter has suggested an outfit in Indianapolis and I have an email into them but no reply back yet.

Looking at all the various things done with modifications and I have not found the following. Is the idea of a sealed plenum going from a woofer to a passive radiator of worth? I wonder if this has been done and what the results were. Is there some value to cubic inches of space (also I would imagine interference to some degree from other components radiating sound waves) over a sealed volume of direct connection to a woofer/radiator allowing perhaps for more dynamic energy transfer and better isolation from the squawker and tweets? Pondering building some speakers and just wondering.

Interesting you mention amps. I am buying a Crown XLi 800 and expect it to be delivered tomorrow. You are welcome to come by and hear it and it was $250.00 with a pair of speaker cables delivered. The KP-480 has a crossover and does not require an additional amp to run it with. You will however need amps to feed the setup with. Had to chuckle at one of your replies to the off topic posts here.

I have a pair of KP115's and a pair of KP-480's and I am off exit 27 I-65 south. I also have a Miller Kreisel V-75 Mark II. Guy with Chorus II's was using this for his home theater.

Bump

THANKS JJ!

I have just gone through 35 pages of posts here trying to find the complete specs for KP-250 and KP-301 and I have had no luck. Any suggestions? The Klipsch site is hopeless and all i get there are links that reference brand new stuff and older links/attachments on this forum that might be of us go nowhere. I bought a pair of KP-101 recently so I am interested in those to.

Looking for some KP-301's for sale close to middle Tennessee. Need some sound for the other side of my shop

I read that the KP 480 was designed with the La Scalas in mind and they are the same size. I have two sets now and one labeled KP-480-SW with four round holes cut in the motor board is the same left to right but smaller front to back. It is also much smaller than the next one which is a KP-480/4000-C and also marked KP480 AX which is the same size as the La Scala. (Dwarfs the KP-250's that came with it) Is there a comprehensive list of all the variants somewhere? Still looking for info on the KP-480-SW. Anyone know anything about KP-480 variants? I have questions people are asking me I can't answer so any help is appreciated.

Thanks CB I will have a look.

I have looked at a number of threads here regarding this Quartet woofer but can't find anything recent. Much of what I find does not lead to anything I can find online like a reference to K-18-K that might work. I can order a re-cone kit from Simply Speakers and while they say it is Klipsch spec they don't say what the kit specs are. I got the pair for $200.00 but don't want to drop a lot of money into them so looking for recommendations. I have never re-coned a speaker before so is this a good time to learn or should I hand this to a pro or just buy new and if so what? Kind of shocked at crummy particle board construction and just four screws to hold the woofer in when I started investigating the bad sound problem.

Islander you are so right. Got around to finally hooking up the Peavey and the improvement over using the Onkyo receiver by itself is significant. I was going to sell all the pro amplifier stuff but I believe I will be keeping the Peavey. Changed the realism of the drums as you say and the detail of the two channels and all the instruments IS much better. Of course now 30 on the Onkyo beats what 45 or 50 used to produce. I am feeding the Peavey with output from the Onkyo. Is this OK to do or is there a better way?

OK switching the crossovers out never seemed viable to me since I read of so many claims that subtle changes can make big differences and different crossovers are not a subtle change. You suggest two modifications. Modifying the crossover is one and what exactly does that entail and what is the result? Did you try plugging the ports on the 250's?

Should this be in the Technical/Modifications section?

Looking for information regarding KP-250's is a bit of a problem. What I would like to know is what has actually been done to improve the sound of these. Does upgrading caps from crossovers not yet 20 years old matter? I read of closing the ports to improve the bass but not an actual one where someone has done this. What would be the result if I do this? Would the KP-250 components be a good candidate for building a new cabinet based on the Forte design and if so with or without the passive woofer? Using my industrial La Scalas as compared to the LSBR's I have had makes me wonder. The industrial La Scala is much better to my ears. I have a pair of Heresy II's and they are just ok at best. If the KP250 can be improved to the same level of improvement the Industrials show over the LSBR I would like to do it. I assume all components were tuned to work with each other in the KP250's. What happens with diaphram upgrades to say the Ti ones from Crites? Is there a better woofer for more bass? Does the crossover allow for these types of changes?

Thanks for the comments all. OK rather than going through all these hoops what about just getting the TX 8270? My Quadro M4000 graphics card with four HDMI output ports is a powerful sound and visual creator and the TX 8270 has an HDMI port there for use with a PC connection. Rather than looking into ways to make the TX 8150 work what about the TX 8270 which is designed for this? For my money if I am going to spend half the cost of something designed to do a job to jerry rig doing the job I would rather spend more and do it right. Onkyo says I can run direct from HDMI port on the PC to the TX 8270 HDMI port. Looking at some of these magical black boxes online and holy cow, $200+ for a little black box??? In the for what it is worth category. Using the audio jack from the PC to the RCA jacks to the back side of the TX 8150 yields some strange alterations to lossless and FLAC at times with high bit rates. The USB flash drive direct into the front USB port on the TX 8150 does not do this so clearly in my eyes the RCA set up lacks some things.