The woofers are mounted on the first one, but I think I want to get the second one 'built' so that I can work on them as a stereo pair.
Once everything gets wired up, the receiver doing its distance/EQ calibration magic should help 🙂 The first speaker hasn't progressed from the most recent picture, but now I know what I'm doing, the second enclosure should catch up soon. I also only have a limited amount of clamps at the moment, so getting the horns out of the way will make it much easier to build the rear boxes.
I also need to do some sanding around the ports on the first horn, as the jigsaw did splinter the wood a little. Then again, this plywood is thin, so I can't really expect anything great the first time around.
Once everything gets wired up, the receiver doing its distance/EQ calibration magic should help 🙂 The first speaker hasn't progressed from the most recent picture, but now I know what I'm doing, the second enclosure should catch up soon. I also only have a limited amount of clamps at the moment, so getting the horns out of the way will make it much easier to build the rear boxes.
I also need to do some sanding around the ports on the first horn, as the jigsaw did splinter the wood a little. Then again, this plywood is thin, so I can't really expect anything great the first time around.
I had a quick 10 minutes to work on gluing the curved pieces to the bottom panel of the second horn. I really simplified the approach using a pair of quick clamps, which held the plastic in place, but still allowed me to make final adjustments.
They were like a third pair of hands, and I didn't need to use any silly counterbalances 🙂
A T-shaped jig would definitely come in handy if a lot of these were going to be made, because then you could glue the panels in one session.
They were like a third pair of hands, and I didn't need to use any silly counterbalances 🙂
A T-shaped jig would definitely come in handy if a lot of these were going to be made, because then you could glue the panels in one session.
Great progress. Why don't you use hot melt to tack in place then add main glue afterwards. No clamps needed other than your hands for 1 minute a piece.
That would definitely be the sane way of doing it! I just don't ever have the glue gun and glue sticks to hand when I have those spare 10 minutes 😉
Great progress. When can we see some photos of these bad boys with woofers installed? How close are you to having first sound with DSP XO's in place?
Well, I've got to cut out the OSB panels for the woofers, and then build the rear enclosures for both horns. I really hope it'll take less than a week, but at the moment it's really hard to say!
The DSP/Receiver are sitting, waiting to be used 🙂
The DSP/Receiver are sitting, waiting to be used 🙂
Unfortunately it was a week! Still, today I managed to cut the port holes on the second speaker, and also cut the OSB panels that the woofers will mount on. I apologise for progress being so slow...
What if?
What about this WG for 6,5?
JBL*6.5 Inch WaveGuide
It's easy and not expensive.
How the PRV 6MR500 high frequencies will act there?
Any idea?
Need a supertweeter though.
What about this WG for 6,5?
JBL*6.5 Inch WaveGuide
It's easy and not expensive.
How the PRV 6MR500 high frequencies will act there?
Any idea?
Need a supertweeter though.
Attachments
Apologies for the delay - last week felt like two!
I've managed to glue on the first woofer mounting panel this morning, and I hope that I can get the second one done later in the day, before the cold front sets in.
I'm getting closer xrk971! 😉
I've managed to glue on the first woofer mounting panel this morning, and I hope that I can get the second one done later in the day, before the cold front sets in.
I'm getting closer xrk971! 😉
You can play around with it. I think I used 375Hz 24dB/oct Butterworth. The woofers have a bandpass cutoff based on the front chamber volume formed by the driver cone and horn mounting wall that limits it to about 450Hz max.
Wow smart and inexpensive project... great !
Does the woofers plays push pull to reduce odd harmonics or do the push air together ?
Does the woofers plays push pull to reduce odd harmonics or do the push air together ?
Thanks! No, the woofers are all push push since you cannot reverse mount them. They have to sit with the front face towards the horn wall.
😀..... I meaned electrical push-pull sorry : phase inverted but driver face to face (with the load of air of the horn cavity between the two drivers of course).
I believed also this conf could work in push pull with a common load in front of two driver with a unique output (Kef 107?) : like a band pass (where the cavity of the horn is the front load/event unique output) but with two cabinets for the rear load like your design, one for each woofer!
I readed this in the Van Dickason book long time ago to avoid third harmonics; Surely an odd idea of me as the front load here is the horn...forgett it.🙂
I believed also this conf could work in push pull with a common load in front of two driver with a unique output (Kef 107?) : like a band pass (where the cavity of the horn is the front load/event unique output) but with two cabinets for the rear load like your design, one for each woofer!
I readed this in the Van Dickason book long time ago to avoid third harmonics; Surely an odd idea of me as the front load here is the horn...forgett it.🙂
Sorry for the lack of updates. The cold over here in Colorado has been quite brutal and so I've had to put my mind to other things.
Still, I did have a chance this afternoon to glue on the second OSB panel, though I have no idea how long it'll take to cure in this weather. PL Premium says that it's OK at 40 degrees Fahrenheit and above, and seeing as the high today was 34 (now currently 14), it might take a while to solidify 🙂
Once the clamps are off, I'll get on with making the rear chambers. At least I'll be able to play with an incomplete (but functioning) stereo pair soon!
Still, I did have a chance this afternoon to glue on the second OSB panel, though I have no idea how long it'll take to cure in this weather. PL Premium says that it's OK at 40 degrees Fahrenheit and above, and seeing as the high today was 34 (now currently 14), it might take a while to solidify 🙂
Once the clamps are off, I'll get on with making the rear chambers. At least I'll be able to play with an incomplete (but functioning) stereo pair soon!
You should bring them inside to warm up in order for the glue to cure. 34 deg will not harden and you will just have a dormant soft glue issue if you try to play it later. Looking forward to seeing your build. Did you get your active XO and EQ all worked out?
I'll bring it in in the morning, and try to find a room where the smell isn't going to be offensive to the others in the house 😉
As for the crossover and EQ, I'm initially going to 'test' my receiver to see how well it can match the systems up! Failing that, I'll do the manual route...which shouldn't take long 🙂
As for the crossover and EQ, I'm initially going to 'test' my receiver to see how well it can match the systems up! Failing that, I'll do the manual route...which shouldn't take long 🙂
Well, after a few hours of sitting inside and in the sunlight, the glue cured.
I managed to drill the pilot holes for the speaker mounts, and attached the woofers.
I rebuilt the mount that the FaitalPRO speakers connect to, and for now I attached them to the frame using duct tape/gaffer tape.
I had a few wiring problems while the house was empty, so I wasn't able to run the auto-configuration procedure on my receiver properly. However, everything is plugged in now, and at the low levels I'm allowed at the moment I'm quite pleased!
Even and precise, and detailed at low levels, even with the television in the background. The stereo separation is superb, but not too headphone-like.
Bear in mind also that this is without the chambers for the drivers, so improvements can definitely be made in that respect.
The midrange frequencies are very good, and I sense a peak that might need to be 'tamed', but maybe it's just the contrast from the last pair of speakers I had sitting around waiting to be replaced 😉
They also integrate well with the T18 subs, and with a bit of finer adjustment on the timing, I should be in good stead. I was playing around with the 'distance' settings earlier, and the difference while altering the values was a little trippy!
I'm not sure if I'll have any more time to work on them this week, but I'm certainly not putting back what they replaced!
I managed to drill the pilot holes for the speaker mounts, and attached the woofers.
I rebuilt the mount that the FaitalPRO speakers connect to, and for now I attached them to the frame using duct tape/gaffer tape.
I had a few wiring problems while the house was empty, so I wasn't able to run the auto-configuration procedure on my receiver properly. However, everything is plugged in now, and at the low levels I'm allowed at the moment I'm quite pleased!
Even and precise, and detailed at low levels, even with the television in the background. The stereo separation is superb, but not too headphone-like.
Bear in mind also that this is without the chambers for the drivers, so improvements can definitely be made in that respect.
The midrange frequencies are very good, and I sense a peak that might need to be 'tamed', but maybe it's just the contrast from the last pair of speakers I had sitting around waiting to be replaced 😉
They also integrate well with the T18 subs, and with a bit of finer adjustment on the timing, I should be in good stead. I was playing around with the 'distance' settings earlier, and the difference while altering the values was a little trippy!
I'm not sure if I'll have any more time to work on them this week, but I'm certainly not putting back what they replaced!
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