He is looking at the 15" woofer and basically picking a place where you could try and match the power response of the woofer (which has begun to beam) to the power response of a horn. Speakers interact with the room and if at all possible you don't want a widely different power response between two drivers, esp. at a crossover point.And does Cask05 mean that any horn which can reproduce 900Hz with wide dispersion (no audible beaming?) will work, though some better than others and/or with other unrelated performance advantages?
Sorry for a late reply.Are you talking about the non-linear distortion that can occur at higher SPL levels more typical of sound reinforcement? JBL testing for that was at 107db.
FWIW, my drivers are 1.6" exit.
Yes, the K402 is also too big for my room and even to sit upon my midwoofer cabinets safely. But why did Klipsch apparently discontinue the K510 horn? Cask05 referred me to this knock off. https://community.klipsch.com/topic...-510-horn-anyone-try-yet/#findComment-2466408 But as it's presumably not geometrically identical to your genuine K510 how likely would it have even more colorations or HOM resonances? https://www.ebay.com/itm/233808725468FWIW, my drivers are 1.6" exit.
Well, yes and no. 107 dB was the level at 10 kHz. It was lower at lower frequencies. The measurement was at 1 meter distance, and thus the level will drop with you typical listening distance. Thirdly, distortion was high with 2" exit. For example above 3% with 97-98 dB/1m at approximately 6000 Hz. With a listening distance at 3 m, the level has fallen to 88-89 dB. So distortion is likely fairly high with a little lower level as well.
It's also generally easier to remain the beamwidth higher in frequencies with a smaller exit.
Too small voice coil, leading to a higher crossover which is never a good thing.If the 1.4" Radian 745neoBe is a poor man's TAD beryllium, what is it about its design that would negatively impact the sound in a two-way system, assuming the (passive) EQ was perfected to flatten and extend the HF response? https://www.usspeaker.com/radian 745neoBepb-1.htm
I think Pierre crossed those Radians in the Athos TH4001 horns with his TAD woofers between ~ 725 and 775Hz. https://www.diyaudio.com/community/...horns-measurements.395046/page-3#post-7253984Too small voice coil, leading to a higher crossover which is never a good thing.
It's a 4" voice coil you want to use and choose a constant directivity horn that can be crossed comfortable at 600 Hz or lower. And it needs to be an active design for high quality. Passive is a no go.
I think Klipsch has a slightly different version of the K510 now that has what they are calling mumps. Not sure on availability of it. The ebay horn is supposed to be good. I think I saw a few posts from people that compared it to an original K510 and didn't see/hear a difference. Certainly low cost.Yes, the K402 is also too big for my room and even to sit upon my midwoofer cabinets safely. But why did Klipsch apparently discontinue the K510 horn? Cask05 referred me to this knock off. https://community.klipsch.com/topic...-510-horn-anyone-try-yet/#findComment-2466408 But as it's presumably not geometrically identical to your genuine K510 how likely would it have even more colorations or HOM resonances? https://www.ebay.com/itm/233808725468
However, if these original horns have been available for much over a decade it seems strange that Klipsch hasn't developed a horn to replace the K510.
Did the throat exit of your (Altec 288-8G ?) drivers require adapters for the K510 horn?
Sorry for a late reply.
Well, yes and no. 107 dB was the level at 10 kHz. It was lower at lower frequencies. The measurement was at 1 meter distance, and thus the level will drop with you typical listening distance. Thirdly, distortion was high with 2" exit. For example above 3% with 97-98 dB/1m at approximately 6000 Hz. With a listening distance at 3 m, the level has fallen to 88-89 dB. So distortion is likely fairly high with a little lower level as well.
It's also generally easier to remain the beamwidth higher in frequencies with a smaller exit