If you don't know, BOFU is a speaker driver from Pioneer with those letters in the model number. They were inexpensive but surprisingly nice and quite popular with DIY folks. These are the original Pioneers. Well, it's time to pass these on to someone else. I built them back around 2015 or so and I've used them for most of that time and was quite happy with them. Then a pair of B&W speakers followed me home from the dump and I was impressed by the speed and resolution over the BOFUs (top end needs help but that's another story).
The BOFUs aren't the last word in resolution, and while the bass goes relatively deep (good output down to 40Hz or lower), and is reasonably punchy and not bloated, it still isn't as tight as the B&Ws. These are transmission line boxes and are basically quite nice. The look isn't too bad for a living room too, though there are plenty of mistakes and issues (mostly not visible from the listening position). The original design didn't use a tweeter, and I tried it that way at first, but found it was a bit lacking in the treble regions. So I put in a cheap 3/4" tweeter with a 4.7uF cap for high pass. This tweeter could use some padding down to my ears, but that's for you to decide. Much of the time I had the tweeters disconnected and used a pair of JBL 2402H bullet tweeters (not positive of the JBL model #).
I recently re-foamed the BOFUs (6 months ago or so) so they should be in good shape for a while. I am in New England (coastal NH) and these are probably for pickup only. They are quite large and heavy. I can provide more pics if you like, showing all the warts. I'd like to recoup some costs and they just are too good to give away. Not sure what is a reasonable price for them so I'd take suggestions. I'll be thinking about price too and post if I come up with something. At some point I'll post them elsewhere but for now they are just here.
Video here:
Just my phone, and compression won't help them shine, but it might give a little sense of how they sound.
The BOFUs aren't the last word in resolution, and while the bass goes relatively deep (good output down to 40Hz or lower), and is reasonably punchy and not bloated, it still isn't as tight as the B&Ws. These are transmission line boxes and are basically quite nice. The look isn't too bad for a living room too, though there are plenty of mistakes and issues (mostly not visible from the listening position). The original design didn't use a tweeter, and I tried it that way at first, but found it was a bit lacking in the treble regions. So I put in a cheap 3/4" tweeter with a 4.7uF cap for high pass. This tweeter could use some padding down to my ears, but that's for you to decide. Much of the time I had the tweeters disconnected and used a pair of JBL 2402H bullet tweeters (not positive of the JBL model #).
I recently re-foamed the BOFUs (6 months ago or so) so they should be in good shape for a while. I am in New England (coastal NH) and these are probably for pickup only. They are quite large and heavy. I can provide more pics if you like, showing all the warts. I'd like to recoup some costs and they just are too good to give away. Not sure what is a reasonable price for them so I'd take suggestions. I'll be thinking about price too and post if I come up with something. At some point I'll post them elsewhere but for now they are just here.
Video here:
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Yes! Thanks Dave! I should add thanks for the plans. Particularly the corrected plans (the grain was off on some of the plans I saw). It helped immensely.
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Bump. You all are the most likely candidates for being interested. I'd like to send them on to someone else, though, so if there's no interest here I will try to sell them elsewhere. Probably for a lot more $$. I'll give them a few more days here, maybe through the next weekend.