Looking closely at the Danley TH118 Spec Sheet
http://www.danleysoundlabs.com/pdf/TH 118 spec sheet.pdf
It does say 4 ohm 28.3V @ 10 metres.
Is this not equivalent to 40V @ 10 metres or 4V @ 1 metre for an 8 Ohm driver
Regards
Martin (Xoc1)
Attachments
Should the difference in real world account for the DSP applied to the test of power aes...
See the blue curve of AES standart (from 50 to 500Hz?) bellow link picture;
-+ -3dBs at 50Hz and +- -6dBs at 40Hz, +- -10dBs around 30Hz
Speaker power handling < Pro-Audio References
See the blue curve of AES standart (from 50 to 500Hz?) bellow link picture;
-+ -3dBs at 50Hz and +- -6dBs at 40Hz, +- -10dBs around 30Hz
Speaker power handling < Pro-Audio References
Hi Martin and Oliver,
In Danley's sheet, they seem to use the reference of 2,83V @ 1m in a ½ Space environment for 108dB avarege and 114dB at 138Hz peak. In that case Martin's Xoc1 TH18-2 does perform even 3dB higher in average.
Danley's SPL response shows that the hardware inside cannot be similar to Martin's Xoc1-TH18. Tom seems to trade 3dB (average) for extra extension down low. Also the peak at 138Hz of Danley’s TH118 is evidence of lower resonances. If you look to the impedance plot it becomes much clearer. While the Cox1-TH18 has his impedance peaks at 45Hz and 104Hz, Danley’s TH118 impedance peaks are at 43Hz and 95Hz.
Looks to me Danley’s TH118 has an 1/3WL of 33Hz and a 1/4WL of 23Hz. That is also a logical explanation for the 3dB less average sensitivity of Danley’s cab in favour for 5Hz extension. That sounds very realistic to me.
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In post 1188 your graph says 1w 1m sensitivity for the Xoc1 TH18-2 with the B&C18SW115 is 98.7 dB.
The adjusted average sensitivity for the DSL TH-118 is 105 dB.(108 -3 dB ).
Why do you say that Xoc1 TH18-2 is 3dB higher in average and 1dB higher in peak?
Art
I use 1w/1m in 2 Pi spaces as a reference for comparing all cabs in my table, which is the original AES standard to prevent confusing from different impedances. Danley measures with 2,83V with a 4 Ohm driver in 1/2 Space as his sheets explains. But if you want to be more precise it will probably end in a difference of 2,6 to 2,8dB, have to do some accurate recalculating before putting Danley's cab in the table.
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Problem is we don't have an impedance plot of the Xoc1-TH18 (other then a HornResp model) to compare with the Danley's TH118 measurements for exact conclusions, but I do agree my 1/4WL assumption is a little too low.
However, I did use Danley's SPL chart and recalculate the plot from SG3225 from the Cox1-TH18 loaded with a 8Ohm B&C 18NW100. I think we can assume SG3225's equipment isn't as precise but it does give a general idea. The less roll off in the end in favour of the Cox1 is because SG3225's measurements were done at 2 meters if I remember correct (or filter settings?). To me it looks like Danley has made a mistake in his conversion calculation.
Danley's TH118 is in red and Xoc1-TH18-2 is in blue.
However, I did use Danley's SPL chart and recalculate the plot from SG3225 from the Cox1-TH18 loaded with a 8Ohm B&C 18NW100. I think we can assume SG3225's equipment isn't as precise but it does give a general idea. The less roll off in the end in favour of the Cox1 is because SG3225's measurements were done at 2 meters if I remember correct (or filter settings?). To me it looks like Danley has made a mistake in his conversion calculation.
Danley's TH118 is in red and Xoc1-TH18-2 is in blue.
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Quick question guys. I just built my first ss15 and have a 3015LF arriving on Friday. Glue is curing as i type (on my hands too). I plan to try it out this weekend with a Bash plate amp from OAudio. Here is my concern. It only has a subsonic filter that goes up to 25Hz and I worry it may even give a little EQ around this cut. It puts out 325 watts into 8 ohms. I'd hate to kill my brand new 3015lf on the first go.
I'm struggling with hornresp to find out what the max power would be assuming no high pass filter whatsoever. I assume all is ok at 1 watt but when would I run into excursion issues?
I'm struggling with hornresp to find out what the max power would be assuming no high pass filter whatsoever. I assume all is ok at 1 watt but when would I run into excursion issues?
http://www.parts-express.com/pdf/300-750.pdf
Oaudio and the partsexpress Bash are the same. Use the above to change the resistor values.
The bass boost is really a sallen key filter. When the Q goes above 1.0 then it also proves a bit of boost as well as a 12db/oct high pass.
The 3db boost, 36-40hz should be about right on a ss15.
Oaudio and the partsexpress Bash are the same. Use the above to change the resistor values.
The bass boost is really a sallen key filter. When the Q goes above 1.0 then it also proves a bit of boost as well as a 12db/oct high pass.
The 3db boost, 36-40hz should be about right on a ss15.
Really? Is the HR input screen on your website accurate? Cause I don't get good response (let alone down to 30Hz) w/the 3015LF using the numbers there or in the file "furysub_2009_try_dwg.pdf". Maybe there's another update..?
And maybe throw jbell's Stadiumhorn in there!
Though big, those may be my best bet for my dubstep/dnb shows. I won't have enough $ for more amps for a few months, so I gotta wait on the 18" THs and work w/what I've got for now (six 3015LFs and just enough to power for them).
I don't currently have any stadiumhorns. I have the 6 drivers, however. 2 are currently in SS15 enclosures, 2 are in BFM T48 enclosures and 2 are still new in the box. Right now I'm looking to put all 6 in same enclosures (instead of mismatched) in a system that can reach down to 30-35Hz.
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