Hi,
Is it matter?
Mid and low-sub are in separate chamber in a 2.5-ways floor standing configuration.
Mid covers 80-2000Hz (1 driver), low (sub) cover 38-125Hz (1 driver).
The ports located between mid and low-sub drivers.
Mid has 2 ports and low-sub has 2 ports.
Is it matter?
Mid and low-sub are in separate chamber in a 2.5-ways floor standing configuration.
Mid covers 80-2000Hz (1 driver), low (sub) cover 38-125Hz (1 driver).
The ports located between mid and low-sub drivers.
Mid has 2 ports and low-sub has 2 ports.
OK you have one, agaon why? Mid should be in its own (sub) enclosure (and it rarely makes snse to be vented).
dave
dave
OK, that’s good, but why ar eyou porting the mid? Are you running steep filters to deal with it unloading?
dave
dave
Greets!
Good question when this close! FWIW, Altec put them as far apart as possible, so inclined to say yes since they measured everything to a high degree of accuracy for best overall performance.
I have thought about it but it's will be placed against the wall. Will do the measurement once I get the CD+horn and the crossover done.
OK, then place them top sides back and adjust length as required to account for the wall loading and critically damp them. For best overall performance, do the woofer vents also.
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I don't not know a technical answer
i looked at a commercial speaker i own, that houses 12" 15" and 18" and all three are ported.........to see what was done.
Appears the ports are separated about as far as practical....if it means anything.
It's a Meyer box which are supposedly technically excellent.
I do not know the technical answer.
i looked at a commercial speaker i own, that houses 12" 15" and 18" and all three are ported.........to see what was done.
Appears the ports are separated about as far as practical....if it means anything.
It's a Meyer box which are supposedly technically excellent.
Thank Mark100, Love your big MEH built....may be some day!
Initial measurement prove positive for the CD+ horn, CD is Peerless dfm-2535r00-08, horn is 280E thank Mabat
Some issues on the Faital W10N8-700
I measure outside with some walls nearby. 30" mike distance, the speaker is ~20" off ground.
Initial measurement prove positive for the CD+ horn, CD is Peerless dfm-2535r00-08, horn is 280E thank Mabat
Some issues on the Faital W10N8-700
I measure outside with some walls nearby. 30" mike distance, the speaker is ~20" off ground.
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When you say there are "some walls nearby", would one of them happen to be about 2m (~6 1/2 feet) away?
A reflection from a wall at that distance would explain the 80-ish Hz dip.
The 3kHz & 9kHz peaks are in the manufacturer's own response curves for this driver, it may simply be that they've used a little smoothing on their graph making them seem less prominent than in your measurements.
A reflection from a wall at that distance would explain the 80-ish Hz dip.
The 3kHz & 9kHz peaks are in the manufacturer's own response curves for this driver, it may simply be that they've used a little smoothing on their graph making them seem less prominent than in your measurements.
There is a paper somewhere on the Internet that I can no longer find. Based on your specifications there may be an advantaged in not separating the enclosures and using only one set of ports. Most on here do not like the suggest because it is difficult to computer model. From memory you should average the T/S parameters between the subwoofer and bass driver.
Sony made a small version of this design.
Sony made a small version of this design.
I came up with 2 versions of the X-over, there is advantage/disadvantage of each. Which one do you prefer, any improvement please comment.
I will eventually doing off axis measurement once I have the turn table built.
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Thanks GM again, I have never thought of the BSC because I do not know how to implemented one. I have read and read ...may be some day!
https://www.diyaudio.com/community/...crossovers-without-measurement.189847/page-49
https://www.diyaudio.com/community/...crossovers-without-measurement.189847/page-49
Your probable correct on both counts , there are 2 walls each about 7 feet near by.
