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Solid 35hz in 4 cu ft

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SonicXtasy View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SonicXtasy Quote  Post ReplyReply Direct Link To This Post Posted: 28 August 2013 at 11:52am
When entering data of a driver that has a Qts lower than .312 (.27 for example) into WinISD that I want to model as a B6, do I enter the correct Qts or do I enter it as .312? Meaning I would have 2 database's for one driver, one for standard alignments and one just for B6.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SonicXtasy Quote  Post ReplyReply Direct Link To This Post Posted: 28 August 2013 at 11:56am
Also, I assume the D2 alignment is a Q of.707?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SonicXtasy Quote  Post ReplyReply Direct Link To This Post Posted: 28 August 2013 at 10:32pm
Can I use the Q=2 high pass trick on a normal SBB4 alignment? I have modeled the Faital Pro 10HP1060 4 ohm and it's SBB4 alignment is 2.9 cu ft tuned to 34.75hz. When I add the peaking HP I get a beautifully flat response.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 29 August 2013 at 1:40pm
D2 is a Qtc of 0.5 (IIRC).

Faital Pro 10HP1060, no data found, even at Faital Pro.

"Can I use the Q=2 high pass trick on a normal SBB4 alignment?"

Only when the Qts is 0.312, for other values of Qts the Faux frequency and Q will need to be adjusted, and the result will be a C6 (with a small amount of ripple).

"When entering data of a driver that has a Qts lower than .312 (.27 for example) into WinISD that I want to model as a B6, do I enter the correct Qts or do I enter it as .312? Meaning I would have 2 database's for one driver, one for standard alignments and one just for B6."

The assumed higher Qts 'trick' may be done with any alignment, not just a B6 (C6). Speaker sims are based on small signal behavior, not with any real power applied.






Edited by _djk_ - 29 August 2013 at 1:44pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 29 August 2013 at 4:36pm
An interesting inexpensive design:

Driver Properties
  Name: Sigma Pro 18A-2
  Type: Standard one-way driver
  Company: Eminence Speaker LLC
  No. of Drivers = 1
  Fs =  28 Hz
  Qms =  8.28
  Vas =  441.2 liters
  Cms =  0.239 mm/N
  Mms =  135.2 g
  Rms =  2.872 kg/s
  Xmax =  6.1 mm
  Xmech =  18 mm
  P-Dia =  381 mm
  Sd =  1140 sq.cm
  P-Vd =  0.695 liters
  Qes =  0.3
  Re =  6.29 ohms
  Le =  1.9 mH
  Z =  8 ohms
  BL =  22.1 Tm
  Pe =  650 watts
  Qts =  0.29
  no =  3.113 %
  1-W SPL =  97.08 dB
  2.83-V SPL =  98.12 dB
-----------------------------------------
Box Properties
  Name:
  Type: Vented Box w/ Active HP Filter
  Shape: Prism, square (optimum)
  Vb =  3.5 cu.ft
  Fb =  38 Hz
  QL =  6.099
  F3 =  38.08 Hz
  Fill = minimal
    No. of Vents = 2
    Vent shape = rectangle
    Vent ends = one flush
    Hv =  10.87 in
    Wv =  2.5 in
    Lv =  25.3 in
-----------------------------------------
Active 12 dB/oct. HP Filter
  Fx =  38 Hz
  Qx =  1.93
*************************
The port could be made smaller, the x-max isn't that huge.
Minimum recommended 
No. of Vents = 1
    Vent shape = other
    Vent ends = one flush
    Av =  32.77 sq.in
    Lv =  11.71 in



Edited by _djk_ - 29 August 2013 at 4:42pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SonicXtasy Quote  Post ReplyReply Direct Link To This Post Posted: 30 August 2013 at 2:57am
Here is the link to the Faital Pro 18HP1016 4 ohm. Please sim it and see what you think. I like Eminence but have had bad luck with the Sigma and Kilomax 18's and therefore avoid them.

Edited by SonicXtasy - 30 August 2013 at 11:38am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 30 August 2013 at 12:21pm
Driver Properties
  Name: 18HP1060
  Type: Standard one-way driver
  Company: Faital Pro
  No. of Drivers = 1
  Fs =  35 Hz
  Qms =  11.1
  Vas =  175 liters
  Cms =  0.0975 mm/N
  Mms =  212 g
  Rms =  4.2 kg/s
  Xmax =  11.45 mm
  Xmech =  21 mm
  P-Dia =  378.3 mm
  Sd =  1124 sq.cm
  P-Vd =  1.287 liters
  Qes =  0.38
  Re =  5 ohms
  Le =  1.26 mH
  Z =  8 ohms
  BL =  24.77 Tm
  Pe =  1200 watts
  Qts =  0.367
  no =  1.904 %
  1-W SPL =  94.94 dB
  2.83-V SPL =  96.98 dB
-----------------------------------------
Box Properties
  Name:
  Type: Vented Box w/ Active HP Filter
  Shape: Prism, square
  Vb =  3.5 cu.ft
  Fb =  35 Hz
  QL =  6.505
  F3 =  35.13 Hz
  Fill = minimal
  No. of Vents = 1
    Vent shape = other
    Vent ends = one flush
     Av =  50 sq.in
    Lv =  24.71 in
------------------------------------
Active 12 dB/oct. HP Filter
  Fx =  35 Hz
  Qx =  1.5
*****************************
Takes about 2KW to hit x-max, Q=1.5 is only a max boost of 3.5dB
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SonicXtasy Quote  Post ReplyReply Direct Link To This Post Posted: 01 September 2013 at 1:35pm
Thanks djk, the 18HP1060 8 ohm (whats above) is probably what I am going to go with.  When I simmed it in WinISD I got a volume of 3.717l but I may have input the data wrong, I will double check. Either way they fit my goal. I was planning on using triangle ports at the 4 corners of the cab. I have been simming them as two 4" square ports but in reality they will be cut in half. Same total area, just spread across more ports, is there a problem with simming it like that?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote snowflake Quote  Post ReplyReply Direct Link To This Post Posted: 21 December 2014 at 2:32pm
just trying to get my head around what drivers to use for B6 alignment. I need an Fs equal to the target f3, Qts up to 20% below 0.312 so it becomes tuned at high power. apart from that is it better to go for a high Vas for higher efficiency and so that I get a larger box volume (0.4*Vas per driver) and the vent length doesn't become impractically long?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote snowflake Quote  Post ReplyReply Direct Link To This Post Posted: 24 November 2020 at 12:20pm
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