Has anyone measured if there is a directivity match between the MWM bass horn and K-402? Seems there are a few people at the Klipsch forum doing this but I've never seen the measurements.
Edit: I am planning to use a straight bass horn below the K-402. Just not entirely convinced that tapped/folded horns should be operating into the midrange frequencies.
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two University Classics per side would do "something" and 4 cabinets occupy ~67 cubic foot of a room and 60" wide / 40" tall / 24" deep for one pair turned on their sides. I still have some dimensions on Ben Drisko's 1948 "Dripschorn" cornerhorn - think it used a mix of flares - don't have a scanner anymore. It appeared to be made of three 4'x8' sheets of 5/8" particleboard and about 52.5" tall
there was a horn plan with major expansion section made of one piece of plywood which mounted in the corner and had exit at the floor - what was that ?
there was a horn plan with major expansion section made of one piece of plywood which mounted in the corner and had exit at the floor - what was that ?
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Those measurements are available via EASE files online.
That's too bad. With a separate straight midbass horn (~70-200 Hz) you're going to get issues with coverage from the midbass vs. midrange (even if time aligned), loss of boundary gain, significant loss of floor space, as well as a fairly unsightly result.
A single horn as a point source that controls its polars down to below 100 Hz has real advantages. You should hear one. I recommend a pair of Danley SH-96s in the room corners.
YMMV.
Chris
I would be crossing over much higher than 200 Hz, somewhere closer to K-402 cut off, and it won't extend as far down either. Would be using multiple subwoofers below the midbass (I suppose upper midbass is more accurate) horn. There is one design I've seen where there is excellent directivity match with the K-402 around 500 Hz.
When i was researching building my replica K402's, I looked into a full jubilee setup but opted to use single 15" BR cabinets underneath. With a DSP crossover it was easy and the setup went loud enough for me and lower than it would have with a jubilee bass bin
A klipsch alternate solution with the K402 horn would be the KPT-942-M
There are alternate bass bins you can look at, but there are going to be compromises in terms of size and/or complexity - the california bass bins seem to do 50-500, are easier to build but are fairly big
A klipsch alternate solution with the K402 horn would be the KPT-942-M
There are alternate bass bins you can look at, but there are going to be compromises in terms of size and/or complexity - the california bass bins seem to do 50-500, are easier to build but are fairly big
fwiw I say the Classic ~ = to Beck's California by Hornresp
TB46's smooth model of the California may make the minute
difference in the plots
I reduced the Classic back chamber size to equal that of
Beck's horn's back chamber for some comparisons
and used a JBL M151 as that's a driver I have laying around.
TB46's smooth model of the California may make the minute
difference in the plots
I reduced the Classic back chamber size to equal that of
Beck's horn's back chamber for some comparisons
and used a JBL M151 as that's a driver I have laying around.
Check also Greg Roberts from Volti Audio....he's developed a variation on the Jubilee called Jamboree. As a builder of horns, I think the Jubilee would be at my pic for a large room/big output bass unit. Andrew
Volti Audio - NL11 - New Horn Speakers - Klipsch Upgrades
Volti Audio - NL11 - New Horn Speakers - Klipsch Upgrades
Attachments
Actually, to give proper credit where it's due I believe that the Jamboree is a Dana Moore design. Greg R built a pair a long time ago and didn't apparently like them. The Jamborees have the same basic folded horn design as the other "W" section folded bass bins.
To the OP: I've helped EQ Jubilee bass bins for more than a dozen Jub owners, and the -3 dB point in at least one room was measured at 25 Hz. The installation listening room of interest has two full corners and room dimensions that support that low frequency.
I don't know of many vented cabinets tuned to that low frequency and certainly none that exhibit clean, tight horn-loaded bass. Rather all the ported cabinets that I've heard have flabby underdamped sounding bass, and also have sharp cutoff frequencies, below which the woofers can easily unload if pushed too far and too low. This isn't true for "W" shaped corner horns.
Personally I get about 31 Hz cutoff frequency with my Jubs located in front of dual subs in the front wall room corners. But instead of using the bass bins down into deep subwoofer territory, instead cross over to dual DIY SPUDs (TH) at 40 Hz to break up the bass band into two to control AM distortion effects--i.e., to eliminate non-harmonic higher frequency sidebands generated by sub-40 Hz moving mass effects. I get about 14 Hz (-3 dB point) out of the SPUDs after nearfield wall stiffeners were added.
Chris
The K-402 doesn't have a "cutoff". The present K-402s are limited only by their 2" compression drivers, most of which don't sound very good below 400-450 Hz.
The K-402 has clean polars down to below 100 Hz:
Thanks for the excellent information. I am certain now that I will proceed with Jubillee-type bins, K402 horns, with driver combos to be confirmed - but likely a Faital/Crites combo. I will probably ask Mr. Crites to arrange the XO for me.
I am trying to sort 402 horns as I write, but it is proving a little challenging. I am sure I will get there.
I am very lucky in the sense that I have two rooms suitable enough for audio -one very large and one more 'normal' size. It will be interesting to experiment with the Jubs in both. it may be a stretch to achieve corner placement in the big room as it is wider than it is deep, but I can try. Be nice to get right down into the lower registers....
Again, thanks for the info. This thread has proved really helpful to me.
I am trying to sort 402 horns as I write, but it is proving a little challenging. I am sure I will get there.
I am very lucky in the sense that I have two rooms suitable enough for audio -one very large and one more 'normal' size. It will be interesting to experiment with the Jubs in both. it may be a stretch to achieve corner placement in the big room as it is wider than it is deep, but I can try. Be nice to get right down into the lower registers....
Again, thanks for the info. This thread has proved really helpful to me.
Good choice re Bob Crites. I've used his gear before, including the very decent "Cornscalla" product. Faital Pro HF200 is a great driver. You could always upgrade to Be diaphragm driver down the track for that added bit of sweetness/detail.
Stick with ply.
MDF OK for some outer panels requiring painting...but only if thick MDF and braced.
That is a potential option. I am low on chums Stateside though, and its a big favor! We will see.
Thick MDF [double 5/8"] = ~18 mm BB ply's ~1.8 mil MOE, so minimal bracing same as BB, but better overall to use 1/2" BB ply with enough cross bracing to = the mass [weight] of a second sheet of 1/2" BB ply. Now you have the mass and stiffness far exceeding the 18 mm cab and any cab requirements likely to be used in an audio app.
GM