Helping a friend put a system together and we're gonna build him some boxes, I suggested the Alpair 12p as I've tried the 10p and was very impressed. I thought the bit of extra directivity from the larger cone would help given we're just going with these with maybe a sub underneath to save some money.
The boxes are going to be right on the wall sitting on a couple of brackets with some sorbothane hemispheres underneath just to decouple them from teh wall abit (condo living) So they'll be maybe just a teeny bit off the wall, but basically on wall on either side of the TV. Sitting distance is 10 feet away, speakers about 8 feet apart.
He has a loft with 16ft ceilings and far away side walls, so its just the width of the room that is small. Very reverberant room, no treatments, concrete floor. Anyhow was thinking of using the following design: http://frugal-phile.com/boxlib/P10free/CGR-Mar-Ken12p-310817.pdf Not opposed to building something even slightly larger as long as its shallow.
Any other suggestions or does this look good? Going to make out of MDF and paint white.
The boxes are going to be right on the wall sitting on a couple of brackets with some sorbothane hemispheres underneath just to decouple them from teh wall abit (condo living) So they'll be maybe just a teeny bit off the wall, but basically on wall on either side of the TV. Sitting distance is 10 feet away, speakers about 8 feet apart.
He has a loft with 16ft ceilings and far away side walls, so its just the width of the room that is small. Very reverberant room, no treatments, concrete floor. Anyhow was thinking of using the following design: http://frugal-phile.com/boxlib/P10free/CGR-Mar-Ken12p-310817.pdf Not opposed to building something even slightly larger as long as its shallow.
Any other suggestions or does this look good? Going to make out of MDF and paint white.
I put a 10" mid range plus a 4" tweeter on my ceiling to listen radio while cooking from a tube car radio (Becker Brescia) already depicted somewhere in this forum. I don't need high quality audio because the radio is only AM and usualy the kitchen is a noise place. But it does it job pretty fine.
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Note: the large speaker is reconed by a friend some years ago, and they (two similar units) had been recovered from a discarded Rockola machine Germany made. So I ignore the characteristics of it.
The CGR will likely have too much bass if mounted on the wall, but you might like it. The slots can easily be filled with open cel foam or simialr to push them even more aperiodic allowing you to dial in the amount of bass.
dave
PS: Personally i like teh A10p better than A12p, bit are good.
dave
PS: Personally i like teh A10p better than A12p, bit are good.
Wall mounted Cornu Spiral Horn?
https://www.diyaudio.com/community/...horn-now-you-can.225622/page-143#post-6926874
https://www.diyaudio.com/community/...horn-now-you-can.225622/page-143#post-6926874
A good idea but it is going to be BIG. Should likely be bigger than the Lowther i would guess.
dave
dave
I had this thought too GM. Why not just angle the sides of the box so they fade into the wall. Wouldnt that decrease diffraction? The only thing is this is my buddy's place not mine, and he's pickier about how things look than I am and probably doesnt want to experiment as much. So figured I'd go for a tested design.
Do you think I'd be better off going sealed? If so does the box size change? . He's going to run a sub so we only need bass down to 80hz or so
Basically negates it horizontally and of course can do it for vertical, but unless the cab is quite deep our hearing acuity can't tell the difference, similar to our poor vertical eyesight acuity, i.e. we're a horizontally opposed species, so why bother unless purely for those that demand 'completeness'.
Understood, just 'throwing' it out there for onlookers, posterity for any future (re)searchers. 😉
No, usually best to resistively vent as a compromise WRT SQ, driver protection. FWIW, I mostly use(d) the pioneer's critically damping a conventional vent that guarantees an optimum amount of resistance (to one's ear) without fancy software to do impulse response measurements.
Depends on the driver, app, but usually would ideally be smaller, so a compromise would be a cab size in-between with a vent that can be tightly plugged if preferred.
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That was my first thot.
It can work better given the high room gain from wall placement. 13-20 litres well stuffed. About 50 Hz anechoic F10 should be a good indicator of flat when gain is added. Free CGR is 13 litres. It offers more tunability given that the vent can have variable stuffing.
dave
Roger that. One last question, figure I'll need any baffle step compensation or a zobel for this cabinet against the wall?
Zobel is for the sake of the amplifier, on the wall is one of the solutions for baffle-step. Needing some of the opposite is more likely.
Even on stands out in the room i have never felt the need for BSC on these (or other miniOnkens). But many seem to like too much bass.
dave
Even on stands out in the room i have never felt the need for BSC on these (or other miniOnkens). But many seem to like too much bass.
dave
Probably the only Mar-Ken design (12p) I thought could have used some BSC. The rest are great without it.
jeff
Got the boxes built, just need to sand paint them. Took some outdoor measurements to share. Thanks for design Planet10! So far after some preliminary listening I would describe their sound as very smooth and smallish, almost cozy like. Good for acoustic type music. Not alot of high treble information but they also dont suffer with any hint of upper midrange/lower treble harshness that I dislike in some of the coaxials I've heard. Very smooth. Does voice very well, so would be good for home theater. Bass is there and not boomy but doesnt encourage getting up and dancing. Anyhow, perfect for my friends application of casual TV and background music.
Im guessing the hump around 1k is from not flush mounting?
Im guessing the hump around 1k is from not flush mounting?
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