You're asking the right questions, but there's still lots to learn.
Putting the driver in the mouth of the TH actually helps:
- The air passing over the driver keeps it cool, which really helps power compression.
- There's often a notch at the top of the frequency response of BLHs (like the one you've shown) and putting the driver at two different places in the same horn fills in that notch.
The driver won't block the sound waves, since the wavelengths are huge. Can your hand block the waves from a subwoofer? I know mine can't.
The bass just wraps around the speaker - it's pretty much invisible.
Chris
Putting the driver in the mouth of the TH actually helps:
- The air passing over the driver keeps it cool, which really helps power compression.
- There's often a notch at the top of the frequency response of BLHs (like the one you've shown) and putting the driver at two different places in the same horn fills in that notch.
The driver won't block the sound waves, since the wavelengths are huge. Can your hand block the waves from a subwoofer? I know mine can't.
The bass just wraps around the speaker - it's pretty much invisible.
Chris
I hear you Chris,
1. If we look at Tom Danelys TH15, Jbell's SS15, Apache H15MKIV, Xoc1s TH18, Cubo Sub etc... we notice that the woofer is mounted an angle allowing the cabinet to have wide (large) exit opening. The woofer does not sit directly in the path.
2. I don't know if there is a relation between sound moving air from the woofer but this is what i think : the woofer sitting where it sits on the THAM15 might cause a drop in SPL. Not sure how significant though.
I am not a professional in sound but i am trying to apply my general knowledge.
1. If we look at Tom Danelys TH15, Jbell's SS15, Apache H15MKIV, Xoc1s TH18, Cubo Sub etc... we notice that the woofer is mounted an angle allowing the cabinet to have wide (large) exit opening. The woofer does not sit directly in the path.
2. I don't know if there is a relation between sound moving air from the woofer but this is what i think : the woofer sitting where it sits on the THAM15 might cause a drop in SPL. Not sure how significant though.
I am not a professional in sound but i am trying to apply my general knowledge.
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The THAM15 has a shorter last path (corners just alongside the woofer compared to the 'other' TH's. So the obstruction is minimal.
To put things into perspective...
Take for example the Weltersys keystone sub. The path is blocked extensively by the driver and also have to go through a small keyhole.
Or take a 6th order bandpass sub where the sub is encapsulated inside the cabinet and has only ports going to the outside.
Really does not matter.
To put things into perspective...
Take for example the Weltersys keystone sub. The path is blocked extensively by the driver and also have to go through a small keyhole.
Or take a 6th order bandpass sub where the sub is encapsulated inside the cabinet and has only ports going to the outside.
Really does not matter.
I see.
How does the THAM15 compare to Keystone sub and TH18 in terms of performance?
Can it compete with them by any measure?
How does the THAM15 compare to Keystone sub and TH18 in terms of performance?
Can it compete with them by any measure?
The THAM15 seems to do well 45Hz upwards, so I'd expect it to hold its own against 18" cabs that are trying to go 10Hz lower. MaxSPL will be similar, but the bigger drivers and cabinets will have more extension down low.
Chris
Chris
Yes. Compact TH that goes low and plays loud is yet to be invented. :-D
And also, "compact" can mean very different thing from person to person.
And also, "compact" can mean very different thing from person to person.
Tham 15
Hi,
I need a suggestion about building the Tham 15. Does the inside wall of the horn path need any damping material like felt or something as in other conventional speakers or subwoofers?
I am trying to build a Tham 15 with Eminence Definimax 4015LF. Is this driver okay?
Hi,
I need a suggestion about building the Tham 15. Does the inside wall of the horn path need any damping material like felt or something as in other conventional speakers or subwoofers?
I am trying to build a Tham 15 with Eminence Definimax 4015LF. Is this driver okay?
"Eminence Definimax 4015LF"
Good driver, but the B&C 15TBX100 has a better cone. In the USA I can get the Eminence for 1/3rd the price, so it's Eminence for me.
Good driver, but the B&C 15TBX100 has a better cone. In the USA I can get the Eminence for 1/3rd the price, so it's Eminence for me.
In India B&C 15TBX100 is not available so had to go with Eminence. Hope it works in tham 15. Will you use any damping material on the inside wall of the horn? is it necessary?
Here is measurement of the Definimax 15".
http://www.prodance.cz/data/attachments/mereni_eminence_definimax_4015lf.pdf
While those drivers re quite good, they´re not best choice for TH. It should work though.
http://www.prodance.cz/data/attachments/mereni_eminence_definimax_4015lf.pdf
While those drivers re quite good, they´re not best choice for TH. It should work though.
I just simmed it and it does work, but not the best. Can you get any of the other drivers that were tested? Also, damping is not necessary at all but you can and this will reduce the HF spikes out of the passband.
Thanks for the reply. I 'm going without the damping material then. Also noticed that none of the construction pics shows any damping material inside.🙂
Thanks for the reply. I understand your point but the original driver for Tham 15 is not available in India and this Eminence was the best thing I could get.
But I would like to put it like this that -- if this works better than a velodine EQ max sub its good enough for me.
I am planning to use Yamaha P5000S as the amp.
Imadman29: it´s generally not about how good the driver is, but about matching the driver with the standing cab. It´s definitely possible to make suited box for definimax, but that is another story. anyway, hope you end up well with that one.
Thanks. But I have already purchased Definimax 4015lf. Lets hope that it all ends in a positive outcome🙂
If you haven't built the THAM15 yet, then I suggest building something else that's a better fit for that particular driver.
Well now I could safely say that Tham 15 does accommodate Eminence Definimax 4015lf in quiet a nice way and the bass it produces is deep. I don't have a power amp to match this woofer so running with a NAD 110W power amp and a Technics EQ as crossover. It is not a ideal setup - rather far from it, still the bass it produces only speaks the genius of the design.
The power amp that I have short listed is Yamaha P5000S to drive this monster.
Thank you all😀
The power amp that I have short listed is Yamaha P5000S to drive this monster.
Thank you all😀
