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Zilch's AK Design Collaborative - Econowave Speaker

Pete B said:
I think I found those to have it stamped into the terminal, don't remember for sure.
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They are stamped into the terminal, and I have now tested the L-pads and determined that for the "min" setting to be all the way to the left, the terminals need to be facing up, i.e, the label on the L-pad body should be upside down when the L-pad is mounted.
 
I've started to lay out my crossovers, but I just now noticed something I didn't think about when I was ordering the inductors. I ordered two solid core 1.50 mH inductors with 0.24 DCR. That's higher than the 0.126 DCR inductor shown on the crossover schematic. Will that be a problem?
 
My Advent 4002 waveguide project is finally finished! After beginning this project many years ago and letting it languish, a final push over the last few months got me over the line. I feel like the effort was worth it--they sound really good. I'd like to thank the countless thread contributors for their collective wisdom. This project represented several firsts for me, such as veneering, and building crossovers. For the cabinets I decided to use a figured cherry veneer which a woodworker acquaintance gave me, and since I'm a novice, I used a cherry-tinted hardening wax finish, which seems to do a good job hiding my mistakes. In an homage to the original Advent 4002s, I used the old masonite boards which held the old binding posts and old crossover components for the new binding posts and L-pads, and mounted the new crossovers on the cabinet floors. The white spot on one of the woofers is a small tear in the cone which I repaired with Japanese mulberry fiber paper and rice starch paste.
 

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Very nice work, those are the smallest Advent Econowaves that I've seen still using
the NLA woofer. I notice that the cones are smooth and not ribbed, I'm quite sure
that all the NLA woofers were ribbed do you think that they were reconed? It's an
easy fix to just get a new pair of woofers used if it bothers you at all.
Again, nice work and enjoy them!
 
S_Denlinger said:
My Advent 4002 waveguide project is finally finished! After beginning this project many years ago and letting it languish, a final push over the last few months got me over the line. I feel like the effort was worth it--they sound really good. I'd like to thank the countless thread contributors for their collective wisdom. This project represented several firsts for me, such as veneering, and building crossovers. For the cabinets I decided to use a figured cherry veneer which a woodworker acquaintance gave me, and since I'm a novice, I used a cherry-tinted hardening wax finish, which seems to do a good job hiding my mistakes. In an homage to the original Advent 4002s, I used the old masonite boards which held the old binding posts and old crossover components for the new binding posts and L-pads, and mounted the new crossovers on the cabinet floors. The white spot on one of the woofers is a small tear in the cone which I repaired with Japanese mulberry fiber paper and rice starch paste.
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Beautiful cabs!!! I’m sure they sound great.
 
Pete B said:
Very nice work, those are the smallest Advent Econowaves that I've seen still using
the NLA woofer. I notice that the cones are smooth and not ribbed, I'm quite sure
that all the NLA woofers were ribbed do you think that they were reconed? It's an
easy fix to just get a new pair of woofers used if it bothers you at all.
Again, nice work and enjoy them!
Click to expand...
I honestly don't know if they've been reconed, but I definitely had them refoamed since I've owned them. The spiders are in very good shape, but I don't remember whether the spiders were replaced when I had them refoamed, or if they might have been replaced if they were reconed. I got these in the mid-80s from someone who wanted my smaller sized AR speakers. (I'm trying to remember if they were AR 18s?) I'm not too concerned about the appearance because I do plan on fabricating some covers which would just cover the bottom portion. But I'll enjoy them for the time being until then.
 

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You can see the ribbed woofers in this thread, and my mod for this Econowave in the last post:

Measuring the "Jackgiff/Bauhausler" (JB) Large Advent (LA) Econowave 2022

When I decided, with a lot of push from Zilch, to build the large Advent Econowave I just wanted to build them and enjoy them. This is the thread from June of 2009 where Zilch and I discuss this build: https://community.classicspeakerpages.net/topic/5541-original-advent-econowave-update/...
www.audiokarma.org
 
Pete B said:
You can see the ribbed woofers in this thread, and my mod for this Econowave in the last post:

Measuring the "Jackgiff/Bauhausler" (JB) Large Advent (LA) Econowave 2022

When I decided, with a lot of push from Zilch, to build the large Advent Econowave I just wanted to build them and enjoy them. This is the thread from June of 2009 where Zilch and I discuss this build: https://community.classicspeakerpages.net/topic/5541-original-advent-econowave-update/...
www.audiokarma.org
Click to expand...
Then I likely don't have the original cones or spiders, but I have no idea if the person whom I got these from had them reconed after he bought them. I do now remember that I had them refoamed around 1998 or so. I've had them since about 1984, and it may be that everything got replaced in 1998, not just the surrounds.
 
First Off, I am so upset with myself for coming in so late to find Zilch's AK Design Collaborative - Econowave Speaker.

I have several JRX112 and JRX212 Floor monitors that are due for a rebuild. The club I used to work for (73 and retired now) had these monitors and finally gave up on them after blowing them up a bunch of times ( wasn’t me. I knew how to run that system.)

The gross volume of these cabs is close to 1.6 cu ft. (45.3 L). That should be enough for the Dayton Audio PA310-8 (1.5 cu ft). It might be tight after subtracting the displaced volume, but I low-cut at 90hz anyway. Or stay with the M112-8 stock 12". I already have the D220Ti drivers in these cabs (Bad idea with the stock crossover), so would the mid-range be much cleaner if I went with the Zilch’s SRC >95dB crossover?

Right now, if in-stock condition the crossover point is 2.1Khz. No wonder they bark!
 
Welcome to the forum.

If it were me I would not be changing those woofers. They've proven themselves reliable workhorses and the cabs are built for them. Thier specs look totally fine too, see attachment.

I have seen a few posts where people have upgraded the JRX compression driver on the horn to the model used in this thread with great success, I guess that's where JBL economised on the on this system?

I'd take an incremental approach, change the compression driver with the classic recommended here. Acclimatise yourself to the new sound, then if you want, build and install the >95db crossover and tune the output of the tweeter to taste.

Just realise that these high efficiency systems will need a subwoofer or more to sound right as they trade off high efficiency for less bass extension.

Good luck and please let us know how you get on.
Cheers!
 

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@Mazza, I agree with you on this advice. I’ve tried the pa310 in this cabinet and I didn’t like it so much. I do like the PA 310. The compression driver in the 212 is nicer than the 113, although it sounds like you already have the Selenium in them, good for you @oldblindjim, and welcome to AK
 
I'll stay with the M112-8. Low end is not a concern. I inputted the D220Ti info from DATS-v3 into VituixCAD along with the crossover network from JRX112 and result explained why the driver sounded so dark. An A-B with the JRX212 and what i have, told me that the JBL crossover network was a mismatch for the D220Ti.
I recently came across the Econowave and became very intrigued. (Lots of reading from everywhere) So I figure the JRX112 with the D220Ti would be a fun first Econowave >95dB project.

Thanks. Now on with the show!
 
If you can measure your drivers in cabinet in accordance with the VituixCAD user guide then you'll be able to build the ideal crossover for your hybrid JRX, and tweak it to your own taste and room.

I reckon I'd try a 2.5way crossover for the 212 to get the bass response and off access improvements that would bring.

Good luck!
 
Mazza said:
Welcome to the forum.

If it were me I would not be changing those woofers. They've proven themselves reliable workhorses and the cabs are built for them. Thier specs look totally fine too, see attachment.

I have seen a few posts where people have upgraded the JRX compression driver on the horn to the model used in this thread with great success, I guess that's where JBL economised on the on this system?

I'd take an incremental approach, change the compression driver with the classic recommended here. Acclimatise yourself to the new sound, then if you want, build and install the >95db crossover and tune the output of the tweeter to taste.

Just realise that these high efficiency systems will need a subwoofer or more to sound right as they trade off high efficiency for less bass extension.

Good luck and please let us know how you get on.
Cheers!
Click to expand...
I don't think the M112-8 Vas is correct. .45 Liters seems a bit low in the T/S chart I would think more like 127+ Liters. Without taking one of my M112-8 out and testing it, has someone pulled T/S pram they could share just so I could play with VituixCAD. Hope to get an old PC so I fire up my LMS and LEAP programs.
 
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