Would also like the HR parameters if possible. THANKS.
Really like the rabbeting of the side panel. Been thinking about trying that.
Really like the rabbeting of the side panel. Been thinking about trying that.
Hey Sine,
Still waiting on those HR inputs/plans. Everything okay?
Its a toss-up between your THs and the THAM15. Leaning towards yours as it sims lower, but the THAM looks to be an easier build.
Chris
Still waiting on those HR inputs/plans. Everything okay?
Its a toss-up between your THs and the THAM15. Leaning towards yours as it sims lower, but the THAM looks to be an easier build.
Chris
tham is a much easier build, and the dayton 385 works very well in it. actually had a hard drive fail on me so I have to go dig the inputs off of a back up 🙁
Ouch, sorry to hear that.
I've a pair of nice Beyma drivers here, so I'd be using those for either design. Dayton drivers are rather difficult to get hold of this side of the pond - import duties and VAT add a lot to what would be a nice budget driver.
Chris
I've a pair of nice Beyma drivers here, so I'd be using those for either design. Dayton drivers are rather difficult to get hold of this side of the pond - import duties and VAT add a lot to what would be a nice budget driver.
Chris
Take the volume of the speaker and add it to the last segment volume of the enclosure. Use the revised model for building. Revert back to the original model for performance.
I wonder if that's accurate enough? Consider for example the extreme case of a driver of low volume whose shape is wide enough to restrict S4 by over 90%...
Why wouldn't it be? If a speaker takes up 90% of S4, then increase the volume between S3 & S4 by 90%.
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refer to post #31
http://www.diyaudio.com/forums/subw...oaded-compact-th-flat-40hz-4.html#post3910199
"so, the volume of the area where the driver is, is 39 liters. the driver occupies 5.1 liters of this space, a 12 percent reduction in volume. dunno what this translates too, again."
that being said, at its widest point, the driver *can shade* as much at 40% of the CSA, even while only occupying 12 percent of the volume. adjusting this (in hornresp) would likely not be accurate because you are changing the flare to much. akabak is requisite.
http://www.diyaudio.com/forums/subw...oaded-compact-th-flat-40hz-4.html#post3910199
"so, the volume of the area where the driver is, is 39 liters. the driver occupies 5.1 liters of this space, a 12 percent reduction in volume. dunno what this translates too, again."
that being said, at its widest point, the driver *can shade* as much at 40% of the CSA, even while only occupying 12 percent of the volume. adjusting this (in hornresp) would likely not be accurate because you are changing the flare to much. akabak is requisite.
Can I find a project that looks like THAM 12 or 15 but have a extension to 43 Hz. not a huge one, just little bit.
Who know how to make a bigger THAM ?? I want just 5-7 Hz lower than 50Hz...
I want a tested project!
Thank you! 🙂
Who know how to make a bigger THAM ?? I want just 5-7 Hz lower than 50Hz...
I want a tested project!
Thank you! 🙂
My BOXPLAN-THAM workbook allows you to experiment with the dimensions and drivers for a THAM fold for a 12" or 15" driver (or any driver, to be honest) and produce a Hornresp sim for the expected output. However a tested alternative? I'm not sure you're going to see much of those 🙂.
David,
YR is not C ;^).
The SS15 starts rolling off below 60Hz, is about -3dB at 50Hz, -10 dB at 40 Hz.
Art
Attachments
I am not a skilled carpenter and dont have fancy power tools so building complicated cabinets is not for me and the cost of paying a joiner to build a tapped horn is mega $$$
I decided to keep it simple with a small (44 litres) sealed box and invest my money in an amazing driver that is flat to 30Hz in room with massive headroom and the lowest power compression ( thermal distortion) of any 15-inch driver I have found.
Highly recommended!!
I decided to keep it simple with a small (44 litres) sealed box and invest my money in an amazing driver that is flat to 30Hz in room with massive headroom and the lowest power compression ( thermal distortion) of any 15-inch driver I have found.
Highly recommended!!
PS
I couldnt afford the 18 inch version but here is the Sim and it still only requires a 2 cubic foot (61 litres) sealed box and adds 6dB more output across the board... House shaking not just room shaking!
I couldnt afford the 18 inch version but here is the Sim and it still only requires a 2 cubic foot (61 litres) sealed box and adds 6dB more output across the board... House shaking not just room shaking!
I couldnt afford the 18 inch version but here is the sim... it adds 6dB across the board and will shake the house not just the room and still only requires 2 cubic feet (61 litres) sealed box!
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Alex,
I'm afraid the Faital Pro 15HP1030-loaded Oth40C would wipe the floor with a sealed box in terms of output.
Not only does the Faital unit have considerably more Xmax than the PD driver you've simulated, but the tapped horn aids the driver much more than a sealed box. The tapped horn here was around 98dB@1w down to 40Hz, and with the driver used, I'd expect a couple of kilowatts would be fine for short-term power. It'd manage around 128dB before thermal problems come in.
Having actually used sealed boxes for PA systems, I'd strongly recommend against it unless you have a very particular reason to do so.
Chris