Some generic ‘shapes’ for reference(thx to Bjorno)
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I will receive my wood soon and will make saw dust ;-) I will screw all together and can adjust / tweak / change after trial and error.. and measuring in my room. Always fun to find out if it works, did some TL's in the past with Dynaudio 21 cm, 30 cm bass, worked great. I had these 16 cm sonic's lying around and thought, lets go for it.. I read that they did well in large sealed enclosure and large TL's only.. what does that say about QTS ?
Not necassarily. Isobaric gains the sensitivity back when two 8 ohm woofers are in parallel for 4 ohm. Yet the box is half the size.
Other than a smaller cabinet ( and parts cost ) what are the pros and cons of an isobaric configuration?
What would be the benefits of an isobaric sealed box configuration over a TL?
What would be the benefits of an isobaric sealed box configuration over a TL?
Huh.. a sealed cabinet doesn't have a port. That was my original question.
But now that you mention it... the Totem Mani-2 is a ported design.
Good IPA, btw.
But now that you mention it... the Totem Mani-2 is a ported design.
Good IPA, btw.
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You read it correctly.... I meant both actually.
Is there an advantage to having two woofers in isobaric configuration in a TL? I guess there would be less distortion, but the advantage of "isoabarism" is sort of lost in a TL?
I guess I don't understand why they would have a ported enclosure with an isobaric configuration either.
Is there an advantage to having two woofers in isobaric configuration in a TL? I guess there would be less distortion, but the advantage of "isoabarism" is sort of lost in a TL?
I guess I don't understand why they would have a ported enclosure with an isobaric configuration either.
So, same length but half the cross section ( half the volume ) is that it?
Can we then cut the "height" of the line by half and fold the line twice... ie: take a once folded line (two segments) into a thrice folded line (four segments)? Or do the number of such "folds" affect the efficiency of the line?
Can we then cut the "height" of the line by half and fold the line twice... ie: take a once folded line (two segments) into a thrice folded line (four segments)? Or do the number of such "folds" affect the efficiency of the line?
This is the RAW result without finisment, will be white satin painted. Goes down to 28 Hz with ease.. first test today with all kind of music. Best result was 35 cm from the ground, speaker units facing up, but was ugly in my room. Second best was with bass speakers down, 6 cm from the ground (on wheels). No resonces that i can hear, no booming bass, just deep room filling bass. cross over 40 Hz 12 dB.
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Some pictures of my unfinished and finished subwoofer. Did some testing first on the unfinished to be sure it worked out. The TL is about 3.2 meters long, volume about 160 liters and they go down to 28 Hz and start dropping there slowly. With some EQ i can get to about 20 Hz but prefer to run them without. Sound is smooth, no booms, resonance or peaks.. and it changed the whole sound image, mid range and even high's. It's ne mold now, love it.
It looks really good.
How did you wire the woofers? Two pairs in series and then the pairs in parallel?
So the box is just over 7 feet long? 220cm... Did you try it standing up? It might make an awesome pair of subwoofers standing up against the corners.
As you laid it down, can you put things on top of the box or will they rattle? You KNOW that something like that will eventually collect stuff like vases, ceramics, etc... Maybe build a full length shelf to put on top of it and isolate it with Sorbothane pucks?
Did you provide the full BOM? It looks like it's simple enough that I could get the parts pre cut for me ( I'd do the holes for the woofers ).
it'd be awesome if you provided the final dimensions. Specially the location of the woofers and slot.
Thanks
How did you wire the woofers? Two pairs in series and then the pairs in parallel?
So the box is just over 7 feet long? 220cm... Did you try it standing up? It might make an awesome pair of subwoofers standing up against the corners.
As you laid it down, can you put things on top of the box or will they rattle? You KNOW that something like that will eventually collect stuff like vases, ceramics, etc... Maybe build a full length shelf to put on top of it and isolate it with Sorbothane pucks?
Did you provide the full BOM? It looks like it's simple enough that I could get the parts pre cut for me ( I'd do the holes for the woofers ).
it'd be awesome if you provided the final dimensions. Specially the location of the woofers and slot.
Thanks
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Thanks, the bass drivers are 8 ohm, they are parallel in two pairs of 4 ohm a channel. I drive them (for the time being) with a two channel 50 watt board amp in 4 ohm. The box is indeed 220 cm and a TL of 320 cm. I did not use it stading up, but thought about it like a collum in the room. I made it like a furniture, on the outside you do'n see anything related with a subwoofer and can use it as a support for TV, stereo ect, even a bank to sit on. The box construction is strong enough to hold a lot of weight. Their is no movement or vibration what so ever because it is a open construction their is no build up of energy in the box. I use it under 40 Hz so it has no "boom" or ratels. It is a easy construction and i made it in four day's included paining and sanding. Wood was pre cut and cut out of one plate 220 x 160 cm The volume behind the bass drivers has some loose stuffing.. The port of the TL has a nylon net to keep the bugs out.
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Thanks
(1) What are the maximum and minimum distances of the internal dividing wall that creates the slot?
(2) Why did you place the speaker terminals in that spot so far away from the drivers?
It's good to hear about the lack of vibrations.
I guess I need to think about the metric things... since around here we use inches.... I guess you your have metric Hz over there, huh?
;-D
(1) What are the maximum and minimum distances of the internal dividing wall that creates the slot?
(2) Why did you place the speaker terminals in that spot so far away from the drivers?
It's good to hear about the lack of vibrations.
I guess I need to think about the metric things... since around here we use inches.... I guess you your have metric Hz over there, huh?
;-D
1. about 6 inch and mnimum 5 inch..
2. because my amp is on that side of the room.
metric: just devide with 2,54 15 cm : 2,54 = 5,9 inch
2. because my amp is on that side of the room.
metric: just devide with 2,54 15 cm : 2,54 = 5,9 inch
Thanks, but still not quite....
Looking at the side where the connectors are. Where the connectors are on the "front" and the back is the "rear" wall.
What is the distance from the slot wall to the rear wall near the connectors?
What is the distance from the slot wall to the rear wall by the port opening?
Oh, I can deal with mm and cm... ;-)
Looking at the side where the connectors are. Where the connectors are on the "front" and the back is the "rear" wall.
What is the distance from the slot wall to the rear wall near the connectors?
What is the distance from the slot wall to the rear wall by the port opening?
Oh, I can deal with mm and cm... ;-)