IB Slammin

Glad to see someone is still using the 698! Loved it back in the day. Always thought if I ever painted a speaker, I would take it to a body shop to get a good job. Perhaps a piano black finish or tons of black lacquer. tc

Called 'Decorators'. It's possible to find Heresy, Cornwall, and Klipschorn in this style. I believe the wood underneath yours is Birch Plywood (no veneer). It will be hard getting all that black out of every pore and crevice. They sold a lot of them raw, meaning no finish. The first owner could put on whatever finish desired. ......and then there was the price.... ordered a pair of decorator "verts" from Hope in '72..... think I paid $350.00 for them (small dealer discount if I remember) Killer speaker and price for a kid in school! .....Ordered Oiled Walnut in '75 ......the wife.. tc

GO HOGs! Love the SS MC100 mono blocks and MC250's. (and 2 MC250's bridged = 100wpc) Both units have a tube like quality. tc

if you are doomed to listen to 5,000 slot machines in an Indian Casino..........forever

LOL If they couldn't beat Alabama when they played so bad it doesn't give them much hope. You boys ........... Suck Stacy MADE him watch the Hog 'bamma game........Seti shouldn't even be allowed to speak the word Football. tc

Jebus Dog! Just get it over with and buy a pair from Bob! (and get your project underway) just kidding with smile........

You get ~5x reduction in cone motion with horn loading for equal SPL output (not 2x), and an efficiency increase of 7x to 10x (not 4x). The total advantage between horn vs. direct-radiating (baffle) is between 15-20 dB in SPL (or alternatively, reduction in required input electrical power of 50x-100x) and a typical 20-25 dB reduction in modulation distortion--the most notable difference, IMHO. Harmonic distortion levels are lower for horn-loaded due to lower required input power/driver amplitudes required to generate the same SPL in-room. All this assumes the same driver used as a direct radiator vs. in a proper horn-loaded configuration, i.e., apples-apples. Why someone would subdivide this advantage into separate smaller quantities--with the combined effect to obfuscate the perceived difference (but NOT hearing difference)--is beyond me. So let me get this right. You are saying that a 107db reflex unit has more harmonic distortion (due to the need for higher input power) than a 107db horn unit? 107db 1w @ 1m is 107db 1w @1m ! Horn or direct-radiating bass reflex. There are many wonderful things about horn loaded LF bins that best most reflex designs. But an increase of harmonic distortion due to low efficiency is something I can't buy. As well as excessive diaphragm excursions being a fault. I just can't find those things in a well designed direct-radiating bass reflex bin. tc

I don't think I'd worry about that too much. I'd just paint the horn however you think would look the nicest. Agreed.. Just paint and clear coat it. Looks great so far. Me too. Just paint those bad boys........ tc

The bullnose looks very cool! But lets not be coy.........smile It's going to sound different than LaS LF. I KNOW that you must have design model projections. What frequency response are you expecting, etc? Have read too many of your posts to buy "looks" as the major design criteria. Come on. Give! Regards, tc

Always thought they sounded pretty good in the right setting. tc

This Agree with much of what has been said............" made in Hope"..... is the deal. Cloned bass bins have been constructed exactly to Hope (PWK/Roy) spec's and with K31 drivers. Perhaps there are numerous examples out there??? Is this about badging or are we questioning the sound quality of clones? The K402 horn and some of the active units are just too wonderful. But lets remember that the original Jub ran a K403 horn and a passive network. That setup sounds too wonderful as well. We are speaking of cloned bass bins here right? tc

Moby Grape....

Yep, and, somehow, an exceptional range of knowledge on tap, which only comes up when needed. Bob is old as dirt and an onery old coot. Makes fun of me and short people. He is the place to go with an audio question. BEC offers cost effective products and upgrades with the principles of thought from PWK. Does his homework. Class act. tc tc

I have his old Peach II into SS mono blocks......cheap and very old Audioquest RCA's......Dead Quiet..... tc

Hey guys don't forget me. I worked on them as well......Pix of me inside with a screw gun........Putting in the networks I think ? tc

shep, just love where you are going with this! My modest DBB two channel system is in a small heavily treated room. AH! CDP with up sampler and Semans CCa tubes. Peach ll preamp dumped into two bridged Luxman SS M-117's for the bottom. The top end is provided by two MC 100 mono blocks Much tight and clean slam plus spooky mids are had in this place. You got it. Just keep going! regards, tc

A man after my own heart. I use the cw1526C in my DBB's. Small format tractrix horn with Altec 902-16A. JBL 2404 baby cheek tweets. ESN DBB 450 nets. tc

Speak up Mark! I thought I was going blind........

I got all of that. But Chris and Mike, you and me listened to the KPT 415 LF unit below a K402 horn. A 107db combo. Didn't see/feel excessive diaphragm excursions. What I did hear/feel was IMPACT from the reflex. Just saying..... Warm regards, tc

Mike, I actually laughed out loud at "How not to have stereo". Great stuff! tc

Wow Andy! A flash from the past. My first audio gathering. Father (Daddy) Dee was such a great host! Product samples were sent from ALK and Juicy Music for our evaluation and enjoyment. Many of the old long time forum guys were present. The audio writer from Fla drove up @#$ I cant remember his name, Deano, BEC ...... Must have been '04 or '05. That pic was shot in the church sanctuary, Iron Man was playing as I recall. tc

Tweet, Bruce and Mark, I agree with all points. For the most part...... But isn't it music dependent? Playing acoustic jazz at 100db is different than playing electronica at 100db for example. Listening to a 12wpc amp into super efficient horns....a thing of beauty. BUT 100db of serious LF? Plug in the insertion loss of a high part count network? I detest floppy bass. My ear tells me headroom is needed. Maybe not always but for the rest of your life tc

Deano, The boards that you built for Mark 1101.......Best LaS I ever listened to (with stock drivers) tc

Yep, lossless only. A nice card and good power supply are the ticket in a music server INHO. My "Too Much Music Machine" has a TB drive internal and two TB external. Plenty of space

http://www.itishifi.com/2010/03/catenoid-loudspeaker-1956-1960.html Thanks Moray I adjusted images to be a little easier to read. These are pretty rare and a great find.. If it hits 30hz it is about 30db down. Schu, Your question shows my hand in playing the age card. Lee Catenoid..... In 1972 I bought a book named Hi-Fi Loudspeakers and Enclosures by Abraham B. Cohen. Among other things Old Abe served as VP of Engineering for University Sound a division of LTV-Altec. It was a 1968 revision of the original 1956 copy and became the audio primer of my youth. Side Bar: Paul Thayer was CEO of LTV-Altec and a family friend of my wife. Got to hang with him a bit in the early-mid '70's. As it was the early '70's all I remember is his three Khorn (center) system., the monster stacks of Mac amps and the stuffed things he had killed in Africa. Anyway, google this guy. His life was....... Sorry back on track: Included in this old book rough plans were for Khorns, the University horn, some WE designs, A7's AND the Catenoid horn. The down firing horn looked pretty cool at the time. tc