Progress being made on enclosures. Many many hours of music enjoyed. I'm listening almost near field (2m away) and due to one wall being significantly closer than the other I'm listening more on axis than I want to be in terms of frequency response. It would appear that the 12p lacks the bump at 10k. Aside from the top end, and I expect a similar driver or is it a completely different animal? Are there any mods designed specifically to tame the top end on the maop 7? I'd rather build the right speaker for the room than start messing with eq.
hmm.
you could have someone make a box (without the front baffle) with a gasket.
Then have that other hold it onto the back of the open baffle.
I'm sure the extra bass would be nice, but at the loss of the open baffle "un-boxy-ness" that cannot be unheard.
you could have someone make a box (without the front baffle) with a gasket.
Then have that other hold it onto the back of the open baffle.
I'm sure the extra bass would be nice, but at the loss of the open baffle "un-boxy-ness" that cannot be unheard.
Sorry, they’re in a sealed box now. It’s not completed. I’ve got a busy few weeks coming up and decided I’d test how they sound now rather than staring at them. I’m generally quite happy. I believe the lack of distortion and generally flat response has me listening louder and that’s when I think I start to be bothered by the 10k peak. I like them better off axis except that the image gets weird due to boundary reinforcement on one side. Thinking I might be better off with one of the (p) models as they appear to not have that feature.
ahhh, i was thinking you were going from the ob in post 40 to sealeds..................
I've had drivers with resonances past 10khz that "bothered" me, I'm not keen on jbl 2408h.
And I've seen mentioned on other drivers, subharmonics also resonate at octaves below a major hf resonance.
https://www.markaudio.com/wp-content/uploads/2021/11/Alpair12P.pdf
please note on their graph, that those lines are 4db apart.
So you are +8db 2.5-3khz, then down, then up 6-7khz also.
And a bit of zing also maybe at 12k.
I've had drivers with resonances past 10khz that "bothered" me, I'm not keen on jbl 2408h.
And I've seen mentioned on other drivers, subharmonics also resonate at octaves below a major hf resonance.
https://www.markaudio.com/wp-content/uploads/2021/11/Alpair12P.pdf
please note on their graph, that those lines are 4db apart.
So you are +8db 2.5-3khz, then down, then up 6-7khz also.
And a bit of zing also maybe at 12k.
Attachments
Thanks for pointing that out. Looks more like trading one problem for another one.
So this has been a really fun experiment and I’m learning a lot as I go (sometimes the hard way).
In my particular application, the standard box sounded better than the makeshift open baffle and the teardrop sounded similar to the standard box only much more 3 dimensional. Everything has more or less been prototyping up to this point as opposed to a finished product.
The last thing I want to try is admittedly odd, but I’d like to try it anyway.
The thought is to port the teardrop. I have two ideas… first would be rather simple and that would just be to port out the rear with a 1” or 2” typical port. The second would be kind of a teardrop within a teardrop (almost like onken) where it will vent forward in a circle around the teardrop that holds the driver.
This is where I’m a little lost. The enclosure is 11 liters in the rear vented version and probably a little bit bigger in the front vented version because of the added volume from the second teardrop surrounding the first one. I’m planning on a 1/2” gap between the two portions of the box if that matters but I’m not sure about the port length there either. Does anyone have a suggestion for the port length on a Maop 7 in an 11L box? I imagine the onken inspired version is just going to be dumb luck from a design perspective and then fine tuned by plugging the vents. Dave is that fine tuning for getting near aperiodic done by ear or measurement, and if by measurement what gets measured?
In my particular application, the standard box sounded better than the makeshift open baffle and the teardrop sounded similar to the standard box only much more 3 dimensional. Everything has more or less been prototyping up to this point as opposed to a finished product.
The last thing I want to try is admittedly odd, but I’d like to try it anyway.
The thought is to port the teardrop. I have two ideas… first would be rather simple and that would just be to port out the rear with a 1” or 2” typical port. The second would be kind of a teardrop within a teardrop (almost like onken) where it will vent forward in a circle around the teardrop that holds the driver.
This is where I’m a little lost. The enclosure is 11 liters in the rear vented version and probably a little bit bigger in the front vented version because of the added volume from the second teardrop surrounding the first one. I’m planning on a 1/2” gap between the two portions of the box if that matters but I’m not sure about the port length there either. Does anyone have a suggestion for the port length on a Maop 7 in an 11L box? I imagine the onken inspired version is just going to be dumb luck from a design perspective and then fine tuned by plugging the vents. Dave is that fine tuning for getting near aperiodic done by ear or measurement, and if by measurement what gets measured?
Maybe this photo is a little less abstract and clarifies what I’m considering.
To reiterate, option A is a rear port 11 liter nautilus influenced teardrop and option B is as seen in the picture where an additional shell would be used to create a front firing vent around the entire enclosure which should in theory slightly increase the size of the enclosure.
In both cases port/vent size is what’s in question.
To reiterate, option A is a rear port 11 liter nautilus influenced teardrop and option B is as seen in the picture where an additional shell would be used to create a front firing vent around the entire enclosure which should in theory slightly increase the size of the enclosure.
In both cases port/vent size is what’s in question.