Hi all,
I purchased a ported enclosure of full range Philips AD12100/M4 drivers recently. The enclosure was 36" x 14" x 18" (Height x Width x Depth). Unfortunately that was too big for my room so I started putting them horizontally such that it would lay 36" along the ground the be 14" high up.
I recently read that these drivers were good candidates for an open baffle conversion so I've simply removed the body behind the speakers and placed them at an angle, slightly toed in as well as inclined towards ear height. This is obviously a starting point and I'd definitely "do it right" if this is the right way to go (remove ports on the baffle, fix the toe in and inclination angles, wall dampening, etc).
Currently I feel that whilst the clarity has improved significantly there is a perceptible drop in "body" when playing music, something that I'm trying to compensate with my subwoofer.
I was wondering if there is anything I can do to my setup to better improve it given the inherent limitations present in my room.
I purchased a ported enclosure of full range Philips AD12100/M4 drivers recently. The enclosure was 36" x 14" x 18" (Height x Width x Depth). Unfortunately that was too big for my room so I started putting them horizontally such that it would lay 36" along the ground the be 14" high up.
I recently read that these drivers were good candidates for an open baffle conversion so I've simply removed the body behind the speakers and placed them at an angle, slightly toed in as well as inclined towards ear height. This is obviously a starting point and I'd definitely "do it right" if this is the right way to go (remove ports on the baffle, fix the toe in and inclination angles, wall dampening, etc).
Currently I feel that whilst the clarity has improved significantly there is a perceptible drop in "body" when playing music, something that I'm trying to compensate with my subwoofer.
I was wondering if there is anything I can do to my setup to better improve it given the inherent limitations present in my room.
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It doesn't look like it. An open baffle that has more bass is going to be bigger than the box you had. You could put them back in the boxes.
Thanks for your reply, I've seen some users work with open baffles for this same driver and get acceptable performance. Does that mean they're compromising with a less bass that what I'm expecting?
Probably.
I had the m8 in a physical sized open baffle (6' tall, center panel 16" wide with wings on hinges 25" deep).
Not much below 150hz, or, no bass..........
I had the m8 in a physical sized open baffle (6' tall, center panel 16" wide with wings on hinges 25" deep).
Not much below 150hz, or, no bass..........
I'm thinking in the interest of space and to preserve as much high end clarity as I can to go the other extreme and to work these into sealed enclosures.
I like really big sealed boxes with lots of stuffing.
I had a b20 pioneer in a 1' deep x 2' wide x 3' tall.
Worked well for what it was.
To me, a big sealed (.5 to .577 qtc) is a loose setup similar to open baffle, as in minimal back pressure on the driver.
Otherwise, the full range driver fights the air pressure in the box.
I could be way off base.........
I had a b20 pioneer in a 1' deep x 2' wide x 3' tall.
Worked well for what it was.
To me, a big sealed (.5 to .577 qtc) is a loose setup similar to open baffle, as in minimal back pressure on the driver.
Otherwise, the full range driver fights the air pressure in the box.
I could be way off base.........
You don't mention equalization. That is normally required to counter dipole cancellation that occurs at lower frequencies.
To make significant dipole low bass typically requires multiple high excursion woofers. But not everyone expects that kind of bass from their system, so some get by with smaller woofers. Your approach of using a subwoofer alleviates much of that burden, but your dipole speakers likely still need some equalization to achieve a normal frequency balance, even if they are only playing down to 100 Hz or so.
Some of the issues are outlined here:
https://www.linkwitzlab.com/models.htm