Bill W.

Mike, IIRC, Roy said Paul never got to hear the K-402 but he did hear the K-510. He wanted a larger horn than the K-510 for the Jubilee (home version) and liked horns with collapsing polars. Roy was working with constant- coverage horn designs (K-510). The K-403 was already developed and was a hybrid design which collapses the vertical polars but maintains the horizontal polars. I believe the K-403 was to be the template for the pretty wooden horn in the pictures of the home Jubilee. I can't speak to the question of nomenclature, perhaps the numbering system is based on assignment for production not development. Hopefully, Roy will let us know.

Mike, I recall the K-403 as being an R&D piece that was older than the K-510. The K-402 was developed after the K-510.

I used stacked Heresys for a budget center channel setup between Khorns during college. Worked pretty well.

Sold the '99 Grand Cherokee with 238k and replaced it with a '02 Grand Cherokee because the first one was reliable for us. Both were used, low mileage. I still drive the '56 Imperial as a daily driver ( 392 Hemi - FUN CAR ! )

I appreciate the passion and commitment that each of these gentlemen bring to their audio pursuits. Doc nailed it when he referred to the complexity of understanding the variables involved and trying to balance them in a system. Many of us own heritage systems that are getting to an age where network components need replacement, hence the ongoing discussions, spirited, misguided or devisive as they may be. I often wish we could come up with a means of ranking each of these networks, perhaps as a result of a big crossover shootout with enough attendees that the opinions expressed would represent a significant crossection of forum contributors. If this ever happens it should include the factory networks for reference. The roadshow approach is great but it clearly has its limitations in terms of what can be learned by someone who didn't participate directly. This is the 21st century after all. Shouldn't we be able to quantify the meaningful differences between competing systems better than we have so far? Maybe I expect too much from 2015 or maybe we are underperforming in our communication somehow. What do you think?

Hey Dean, What happens when your son starts removing parts from that passive and gets down to 0? Hmmm - time to start exploring actives ???? SORRY Dean, I just couldn't! resist!!!!

Survey done

Alex- First, I want to say thanks for responding as you have, it is a refreshing departure from today's politically correct corporate world. As a long-time owner of Klipsch products, I want to share a few thoughts; The challenge of marketing the Klipsch brand of products is completely different today than in decades past. The array of products is broad (out of necessity) compared with the Heritage lineup of the 60's and 70's and the independent retail dealer business model is all but non-existent today. The product and marketing segmentation which results from this makes it hard to maintain a coherent brand identity that consumers can relate to as they could in the past. I feel that Klipsch's recent efforts to introduce PWK, company history and product philosophy to a new generation of consumers is a positive step. Now the company must respond by backing that up with ALL of the products and services that reflect that philosophy. When I was first introduced to Klipsch products more than 40 years ago, there were THREE VERY SPECIFIC THINGS that attracted my attention to the brand; 1. "If you cannot hear the difference, you are not ready for Klipsch speakers yet" ( This achieves what the best marketing messages achieve- it is a call to action because it personalizes the message. You must hear for yourself to see if it is really true!) 2. Superior design and craftmanship over most competitors 3. Dedication to continual product improvement /low obsolescence /ability to update for a lifetime (This is a big deal as it is so rare!) I have presented these points because I believe that they remain relevant and therefore valuable to the company's success going forward. Thanks again for your post. Bill

I would like to convert my 3 channel Klipschorn / Belle Klipsch system to a two-way system with the K-510's and build a center channel speaker with the other K-510 for my Jubilee system.

The original K-700 horn was sand-cast aluminum, fairly thick walled, used for many years for the Heresy. The replacement was die-cast aluminum, thinner walled than the original but with better dimensional uniformity. It has smoother frequency response than the original.

I would buy 4 510's if available.

Hope that's marine grade plywood-- the sky looks threatening!

Well Marty, they say timing is everything, right? Interesting to ponder!

Here,Finally! 'tis the season for moving from Arizona to Colorado for the summer.

The type D and type C crossovers maintain the same polarity to all drivers. Only the type E crossover reverses polarity to the midrange and tweeter relative to the woofer.

C2 is the only cap change needed, from 2.0uf to 1.0uf. You are correct on the autoformer taps, midrange changes from tap 2 to tap 1, tweeter changes from tap 3 to tap 2. If you look at the schematic of the E network, you will notice the polarity reversal for the midrange and tweeter is done on the 'back' side of the terminal block. it is easier to simply reverse the black and red leads for the midrange and tweeter on the 'front' side of the terminal block to achieve the same result.

They are different enough to detect. I wouldn't mix them side-to-side but front-to-back would be acceptable for most listeners here. (there now... is that better?)

There are two threads on type C and type D networks going on in the technical/modifications section right now. If you look at the schematics posted there, you will see how to convert a type E or D network to a type C. Very simple with one change in cap value and changing the midrange and tweeter taps one step lower.

Hey JFT, If you compare the schematic for the type E network posted above with your type D, you will see the only difference is the reversal of polarity on the midrange and tweeter relative to the woofer. The type E provides some cancellation in output centered around 700 hz where the woofer and midrange output overlap. This makes the lower midrange sound less full, less prominant. To hear what that is like, simply reverse the leads on the midrange and tweeter where they attach to the terminal strip.

Please remember if you have type E crossovers (factory or aftermarket) both the midrange and tweeter are set to +3db on the autotransformer as compared with the original type C crossover. It will definately sound more forward than it did from the factory. If you want to hear what the H-700's were like when new, you can try the type C setup.

Beautiful Klipschorns, congratulations! The signature looks authentic to me, almost the same as on my Belle and another personally autographed item from when I met the man.

Yes, reverse the polarity on both the tweeter and midrange relative to the woofer otherwise you would be creating a polarity reversal between the midrange and tweeter as well.

The two networks will sound quite different in the tweeter section, even if the type A network has viable caps. The higher-order networks are definately more sibilant.

Heresy H-700 speakers of this vintage had woofers that produced somewhat less mid-bass output than later versions. Examples include the cast frame EV model and the one found in your speakers. The original crossover would have been the type C network, used until the early 1970s IIRC. A Dope from Hope memo published around that time indicated improvements in mid-bass response which required a revision to the crossover network, raising the autoformer settings on the midrange and tweeter by 3db each, along with corresponding changes to cap values. This was the type D network, used for a short time until the type E network replaced it. The only difference between the D and E versions is the reversal of polarity in the treble section of the E relative to the woofer. Based on this, I believe you are hearing the difference between the older and newer woofers in the mid and upper range of output. This,as well as the changes in the crossover networks has a distinct effect on the overall sound. P.S. If you are using an aftermarket network with the type E configuration, the reversed polarity centered at 700Hz will produce an octave-wide dip in response between the woofer and midrange.Keep in mind this crossover design was intended for use with the later woofers. If you have the earlier (lower output) version, there may be too much loss in this region with both things happening. Simple suggestion: Try reversing the polarity of the midrange and tweeter wires on the terminal strip inside the box and have a listen. You may be suprised at the result. Let us know what you think Bill

I'm interested in trying this out.