Tony T Posted April 7, 2020 Share Posted April 7, 2020 I'm wrapping up a recent experiment. I've already assembled; KPT-904-LF Cabinets (dual15" bass). These cabinets are currently configured 2-way Altec 511B metal horn lens' w/k-55-m drivers DE-120 Drivers (replacements for k-77-m) My situation is obvious. I need a 3-way crossover network. The only thing I can find that is close to what I am doing (within current Klipsch inventory) is the KPT-435-N setup. Needless to say, a totally different mid/high horns and drivers approach. The way I see it, I have a slightly upgraded version of the Khorn with 2-15" woofers instead of one. Add to that the arguably better, DE-120 hf drivers. A bit more brilliance to these old ears. I plead to the "Crossover Gods" within the magic land of Klipsch to bestow their knowledge upon me. Please forgive me as I do not understand anything more than retrofitting replacement crossovers to my Khorns or Lascala's in years passed, and that's about it folks! Since I've never learned, I do not comprehend techy stuff very well. The only bad "frequency" I understand is low quality speakers. Thanks to all, Tony Quote Link to comment Share on other sites More sharing options...
OO1 Posted April 7, 2020 Share Posted April 7, 2020 - Quote Link to comment Share on other sites More sharing options...
carlthess40 Posted April 7, 2020 Share Posted April 7, 2020 Dave A should be able to tell you a good starting point for the setup with a electronic crossover. I think he used them with his Klipsch horn bass cabs and so onSent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
JohnA Posted April 8, 2020 Share Posted April 8, 2020 You're at the most difficult and detailed portion of a speaker's design. It takes testing, knowledge and trial and error. Were I you, I'd replace the K-55 with an Altec/Great Plains Audio 902-8*, damp the 511B and lose the tweeter. I'll give you a design I did for the 902/511B that was pretty flat and pulls it down to 104 dB/w/M and crosses at 1 kHz. The low pass is for an FH-1 and won't work with your 904-LF. Quote Link to comment Share on other sites More sharing options...
Tony T Posted April 8, 2020 Author Share Posted April 8, 2020 Gosh, I hate to lose the DE 120's as the horn lens' (511b & walnut mahl v1) are already nicely mounted to the plexiglass motorboard on top of the KPT-904's. I'm truly a fan of 3 way over 2 way. I'm wishing for a 3 way approach. In addition, I rolled a fresh coat of Duratex over the 904's. I then took the time to have the Altec 511b's powder coated to a nice glittery bronze color. Add to that the walnut lens and I have to admit, everything looks pretty sharp put together. Too late to break things up. Quote Link to comment Share on other sites More sharing options...
Tony T Posted April 8, 2020 Author Share Posted April 8, 2020 It has since been suggested I obtain an active crossover and play with the settings. I'm not even sure how to begin with that. Quote Link to comment Share on other sites More sharing options...
Chris A Posted April 9, 2020 Share Posted April 9, 2020 Here's a thread that discusses integrating DSP crossovers (which is what you apparently need for your problem): If you have specific questions that are not addressed, feel free to PM me. Chris Quote Link to comment Share on other sites More sharing options...
MechEngVic Posted April 11, 2020 Share Posted April 11, 2020 On 4/8/2020 at 4:14 PM, Tony T said: Gosh, I hate to lose the DE 120's as the horn lens' (511b & walnut mahl v1) are already nicely mounted to the plexiglass motorboard on top of the KPT-904's. I'm truly a fan of 3 way over 2 way. I'm wishing for a 3 way approach. In addition, I rolled a fresh coat of Duratex over the 904's. I then took the time to have the Altec 511b's powder coated to a nice glittery bronze color. Add to that the walnut lens and I have to admit, everything looks pretty sharp put together. Too late to break things up. Man, what do we have to do to get you to post some pics of those speakers?!?! Quote Link to comment Share on other sites More sharing options...
Dave A Posted April 11, 2020 Share Posted April 11, 2020 On 4/7/2020 at 10:40 AM, carlthess40 said: Dave A should be able to tell you a good starting point for the setup with a electronic crossover. I think he used them with his Klipsch horn bass cabs and so on Sent from my iPhone using Tapatalk Oh No don't ask me I had to seek help to do my system. I know enough to be dangerous with all this. I can tell you on the S-MWM it was the way to go. I have a set of KPT-456's in the shop right now and they sound good enough with a passive cross over that I won't go any further. Quote Link to comment Share on other sites More sharing options...
carlthess40 Posted April 11, 2020 Share Posted April 11, 2020 Sorry Dave for dropping your name in hereSent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Rolox Posted April 14, 2020 Share Posted April 14, 2020 On 4/9/2020 at 1:16 AM, Tony T said: It has since been suggested I obtain an active crossover and play with the settings. I'm not even sure how to begin with that. If you want the easy approach, buy an ANALOGUE active crossover an a couple of small class D amps you could get the Sublime Acoustic K231 active crossover, with a few x-over cards - for example, 500Hz and 5KHz - 24 and 12dB each, so you can try both Big SS amp on the bass, and the small class D on the mid and treble You might find out that is all you need! Quote Link to comment Share on other sites More sharing options...
Dave A Posted April 14, 2020 Share Posted April 14, 2020 OP I would advise you to talk to Chris A. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.