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  1. Replies
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    Strange, I know I wrote a reply yesterday, I must...

    Strange, I know I wrote a reply yesterday, I must have messed up... Very cool project, Rob! Bit above my level, have to admit. Regarding sub, I considered cloning a B460 or 380, but my room is just...
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    Wow, very cool, Rob! I guess that would be the...

    Wow, very cool, Rob! I guess that would be the ultimate, adapt a DX-1 to the 250. No beginners task, for sure. Two resistors and cap is my max soldering level. Wouldn't know the meaning of much in...
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    So, I've rigged my 2-way crossover for the...

    So, I've rigged my 2-way crossover for the passive side, biamping it using the EC AW75. Biamping is a good option, perhaps enough for many. Clearly worth it to my ears :)! Easier to deal with, for...
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    Got them up and running today, all drivers going...

    Got them up and running today, all drivers going via dbx crossover for now. I think this may work out really well, set up by ear is already very pleasing. The dynamic power is undeniably improved. I...
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    Thanks grumpy. Doing it line level would...

    Thanks grumpy. Doing it line level would naturally be better and even looks within my capabilities to make... Didn't know it could be that simple.
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    So, things didn't quite go as planned, but no...

    So, things didn't quite go as planned, but no problem. The two mids are mounted in small boxes inside the baffle, and cables are glued. I'll cut the c.o. cables as it's the cleanest way.

    I've...
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    This is really useful. Very interesting to see...

    This is really useful. Very interesting to see how much the woofer is allowed to play, "star of the show" in the 240Ti.
    Btw, here's the interview Erin's Audio corner did with Greg Timbers in 2022...
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    Thanks, I'll be careful. I think it's all well...

    Thanks, I'll be careful. I think it's all well marked, they used Monstercable internally, clearly colorized and noted on schematic. Tidy. Looking at the raw driver data and what I've experienced with...
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    Hi Odd, thanks, I will study them, for sure. Got...

    Hi Odd, thanks, I will study them, for sure. Got my wires and connectors today, if they all fit I can make parts and perhaps connect up tomorrow :).
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    Great, I see the RTA will be very useful. I...

    Great, I see the RTA will be very useful. I realize the dbx is limited, but the cost of next level is pretty steep. It seems building a custom active c.o. based on premade modules is possible, but...
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    I haven't used REW before, and I see it has what...

    I haven't used REW before, and I see it has what looks like a nice RTA and signal generator. Never mind the noise here (it's sitting on thwe workstation), but some single tones to each driver on my...
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    Thanks, Rob, I'll see if I can decode something....

    Thanks, Rob, I'll see if I can decode something. That's quite different from the TI BQ network, btw. Did drivers stay the same for the Jubilee? To be honest, the theoretical side is weak here, so... ...
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    250Ti - 4-way active experiment

    So, while my JBL 250 Ti passive crossovers are in for repair, I thought I might try an active setup - just as an experiment. I have a dbx 234Xs crossover and 4x200w amplification running fully...
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    Going active?

    So, while the c.o. is out for repairs, I'm toying with the thought of going fully 4-way active. Use a dbx 234Xs, as I already have one in house. Do one speaker first, see if I can match up it up to...
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    Thanks, guys. I'll check closer when I get it...

    Thanks, guys. I'll check closer when I get it out, but I think I'll have to get help, getting to the small caps underneath will be a bit over my comfort level as far as soldering. But I'll try to...
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    All checks out, colour coding is correct. Monster...

    All checks out, colour coding is correct. Monster cable soldered to the board, I get a weak signal from the tweeter when measuring some resistors, so cabling from board to tweeter is good. Nothing...
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    250Ti BQ LTD crossover issue

    So, I recently aquired a set of 250Ti BQ LTD in very nice condition. Except for the left tweeter not playing 100% silent. I switched the tweeters, and the driver is fine, it plays in the right...
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    240Ti on the side...

    Hey mac, all, greetings! Here's how I will say goodbye to mine, and how I think they play best. The reason is of course the high crossover from the woofer; 900Hz. Vocals will for a large part come...
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    Interesting to see this sub chassis, I have a...

    Interesting to see this sub chassis, I have a Heybrook TT2 which is very much the same design principle, yet solved slightly differently.
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    New temporary armboard, different arm coming...
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    I'm trying to fix some 044Ti's with powderized...

    I'm trying to fix some 044Ti's with powderized damping plugs. The 044Ti wasn't pierced originally, so I'd be hesitant to pierce it, myself. I was hoping a 035Tia foam plug could maybe be compatible,...
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    Ok, I see. As you say, it's already there so......

    Ok, I see. As you say, it's already there so... Guess I'll ignore it for now and proceed. I should be able to generate a sweep test, hopefully that will tell me something. It's a backup, but I still...
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    *Sigh*. If you look closely at the pics of the...

    *Sigh*. If you look closely at the pics of the tweeter, there's a small black dot in the middle of the dent in the first picture. My friend in France recieved it like that, yet in the pics posted by...
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    Very informative video, thanks a lot :)! I think...

    Very informative video, thanks a lot :)! I think the foam I have found is very similar to what he's using, very soft. I will trim them a little, and maybe "dome"-shape them as well. He's compressing...
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    So I'm considering using these for plugs, unused...

    So I'm considering using these for plugs, unused Thorens spring damper foam from recent replacement. Very soft and easy to compress, and I know they will not powderize over time. How long they will...
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    Hm, I think if I could get the 12-18 year...

    Hm, I think if I could get the 12-18 year material, I'd start there and maybe try to measure my way to the right foam compression level. Long process perhaps, but maybe possible using a UMIK-1 and...
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