Just wonering is there any successful wHw diy build out there I can reference, I couldn't find one
I am looking at woof around 10 inch or 12 inch , and compression driver that can handle mid range to high freqency. Something look like GT sound or the traditional JBL speaker
I am looking at woof around 10 inch or 12 inch , and compression driver that can handle mid range to high freqency. Something look like GT sound or the traditional JBL speaker
What does wHw mean?
One successful CD + 12" woofer product I have heard is Peavey SP5 (2004). Bass was a little light on the bottom octave, so I bought SP2(2004). Crossover was 1800 hz. Goes down to 54 hz -3db. You can buy used ones for <$200 on craigslist & ebay. The 1.4" CD in those products, RX22, doesn't produce 17 to 20 khz. I can't hear that anyway. Neither can most males over age 12. Fireworks, lawnmowers & weedwhackers, evan a kid can abuse his ears with those.
Less successful products IMHO have a 1" CD and a woofer. I've heard the Peavey PV15 and didn't like it much. Okay for spoken voice. I test with CD's of wood pianos which are hard to reproduce. An 11' Steinway grand can be heard live at many concert halls & some churches for reference.
A diy copy of a JBL 15" + CD 2 way is the asathor which thread is very active on this forum. JBL professional line doesn't sell in my tiny city of only 2 million pop. so no way to hear one live. https://www.diyaudio.com/community/threads/asathor-a-jbl-4367-clone.367215
One successful CD + 12" woofer product I have heard is Peavey SP5 (2004). Bass was a little light on the bottom octave, so I bought SP2(2004). Crossover was 1800 hz. Goes down to 54 hz -3db. You can buy used ones for <$200 on craigslist & ebay. The 1.4" CD in those products, RX22, doesn't produce 17 to 20 khz. I can't hear that anyway. Neither can most males over age 12. Fireworks, lawnmowers & weedwhackers, evan a kid can abuse his ears with those.
Less successful products IMHO have a 1" CD and a woofer. I've heard the Peavey PV15 and didn't like it much. Okay for spoken voice. I test with CD's of wood pianos which are hard to reproduce. An 11' Steinway grand can be heard live at many concert halls & some churches for reference.
A diy copy of a JBL 15" + CD 2 way is the asathor which thread is very active on this forum. JBL professional line doesn't sell in my tiny city of only 2 million pop. so no way to hear one live. https://www.diyaudio.com/community/threads/asathor-a-jbl-4367-clone.367215
Last edited:
Bascally a diy cloene of JBL k2 9500 M9500, Perhaps we can do it at 12 inch not the 14inch speaker unit
or GT sound srv 1b1
I guess jbl dms-1does not count as it requires electronic crossover
Or like the LALS Classic-15CT
If you want kit, DIY Sound Group's model 1099 is pretty close.
Otherwise check out any Econowave design and double up on the woofers.
If you want kit, DIY Sound Group's model 1099 is pretty close.
Otherwise check out any Econowave design and double up on the woofers.
There is one build going round gathering some excitement ( though not here but over at AVS Forum >> search out a thread started by a fellow going by the moniker of "Schurter" in the DIY Speakers + Subs forum ).
His build is an evolution of a design first published by "Toids DIY Audio" ( who has a YouTube channel ).
- Schurter's design changes involve using a larger diaphragmed HF driver ( 65mm vs the original 44 mm ) and a redesigned crossover.
Toids design was inspired by the desire to make an MTM that resembled the JTR 212HT.
Schurter commissioned his redesign help from Joseph Crowe ( here in Canada ).
Joseph Crowe's ES600 BiRadial should be another step-up in quality ( I assume, though without any "ears-on" experience ) over the stock SBA horn.
The drivers used are all made by SB Audience ( therefore, are pretty affordable ).
Plans and crossover schematics will cost ( I'll assume ).
BTW; I've left out links on purpose >> you'll need to do a bit of searching on your own.
🙂
![20221019_213034-jpg[1].jpg](https://www.diyaudio.com/community/data/attachments/1022/1022058-50927aaa96a48538197408bc4a009673.jpg?hash=UJJ6qpakhT "20221019_213034-jpg[1].jpg")
@sagitis
Here's a link to Joseph's YouTube review of the SBA driver mated to his ES600 BiRadial.
As expected, even his smallish ES600 BiRadial has very nice lower octave response when mated to a compression driver that sports a pretty compliant surround ( that would also include the Altec 288 >> which is my current mid-driver of choice ).
Here's a HiPass workup of mine ( basically an exercise in achievable flatness ). I used the presented 15deg trace from the video.
There are a pair of LCR notches ( not shown in my pic ). One is centered around 8K while the other is at around 2650hz.
Red trace is "raw" response on the ES600
Green trace is with the full HiPass in place.
Grey trace takes the 2650hz notch out of circuit.
I would imagine that 2650hz ( very low-Q ) notch might be omitted for a still, very listenable result.
Worth noting is the original response captures made by Joseph has a 4-pole ( active ) hipass applied in place ( at 250hz ).
- This will effect the true lower-end response of the horn/driver combo somewhat.
🙂
Here's a link to Joseph's YouTube review of the SBA driver mated to his ES600 BiRadial.
As expected, even his smallish ES600 BiRadial has very nice lower octave response when mated to a compression driver that sports a pretty compliant surround ( that would also include the Altec 288 >> which is my current mid-driver of choice ).
Here's a HiPass workup of mine ( basically an exercise in achievable flatness ). I used the presented 15deg trace from the video.
There are a pair of LCR notches ( not shown in my pic ). One is centered around 8K while the other is at around 2650hz.
Red trace is "raw" response on the ES600
Green trace is with the full HiPass in place.
Grey trace takes the 2650hz notch out of circuit.
I would imagine that 2650hz ( very low-Q ) notch might be omitted for a still, very listenable result.
Worth noting is the original response captures made by Joseph has a 4-pole ( active ) hipass applied in place ( at 250hz ).
- This will effect the true lower-end response of the horn/driver combo somewhat.
🙂
Take a close look at the K2 S9500, there is a specific reason the 1400ND drivers were made for this application.
It has a squared off basket, and the baskets O.D is a lot narrower in comparsion to diaphragm size, then just about any woofer you can find in similar sizes 12 or 15. Look at how close to the edge of the basket the surronunds end, etc in the pics below, from a 1400 pro that has the very similar design
Also notice how close to the horn the woofers actually are mounted on the baffle, and how short the horn is in the vertical direction, and the XO being all the way down at 650 hz. That is why those speakers actually make a decent MTM /WTW or what you wanna call it., well executed design by jbl.
While the G.T Sound, example using more conventional 16" woofers, a 30 cm tall horn, baskets 2 inches ish above the horn, but even with the lower crossover around 500hz, it will exhibit more lobing due to the design choices.
Large cones and MTM means large c-t-c spacing, needing a very low crossover to avoid the lobing issues that comes with it. Unless that is what one is after to manage vertical directivity somehow.
Some of the 12" you will find, does not give you a shorter C-T-C distance, in relation to wavelengths then that 14" JBL would, rather the opposite in many cases. And will want to cross naturally higher for a directivity match to the horn etc usually.
Attachments
With the h280 horn and sb audience 65cnd-t Troy has the crossover at 600hz
I don't know of a horn /CD combo any lower (2 way) in home theater setting
All of the SB horns are diffraction types and don't sound as neutral as most of the other SEOS designs. That specific SB driver in the video doesn't sound very smooth up top, especially at higher output levels. You can hear the 8k issue immediately, making this driver not as suitable for a critical hifi application. I'd choose the SB driver model with the PEEK diaphragm instead of the Ti, as it sounds much cleaner all around without the somewhat rough sound higher up. I encourage people to listen to this driver first on a decent horn before committing to a design with it. You can always swap the TI diaphragm for the PEEK one into the same driver AFAIK.
I'm not a big fan of Crowes driver choices with exception of the RCF N350, which sounds similar to the 18Sound NSD1095N but without the more refined dome tweeter like top end. IMO The Faital HF108 is by far a better driver choice.
I'm not a big fan of Crowes driver choices with exception of the RCF N350, which sounds similar to the 18Sound NSD1095N but without the more refined dome tweeter like top end. IMO The Faital HF108 is by far a better driver choice.
You might be getting the 2 projects mixed up
Toids DIY Audio did a build with a 1" compression driver Sb audience
I took the same idea and upgraded to the h280 horn and sb audience 65cnd-t CD
Troy Joseph Crowe is a few HRS from me he did the passive crossover,
All hiend parts,