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- Demo Quick Start For MacSpeakerz, The Speaker Design Toolbox
-
- I. Closed Box Evaluation
-
- • Launch the MacSpeakerz Demo Disk.
-
- • Notice that the driver you will be evaluating is loaded in the Driver and Subsystem
- Parameters window, the Nordschow-Wright NW1800.
-
- • Activate the Box Parameters window by clicking on it once or use the left/right
- scroll keys to activate the windows.
-
- • Activate the VB, (Box Volume), field by clicking on it. Try a box volume of 2 cu ft
- followed by Return. (Or use the Box Calculators under the Box Menu (at top) to design
- your enclosure).
-
- • Notice that the Qtc (Closed Box Q) has been calculated.
-
- Note: You can also approach your enclosure design by entering a Qtc (Closed Box Q), and
- the corresponding VB (Box Volume) will be calculated. Try the Butterworth alignment
- of .707 in the Qtc field, followed by return. This alignment will give you the flattest and
- most extended Frequency Response.
-
- • Do a Command F from the keyboard.
-
- • Check out the Frequency Response curve!
-
- • Store it in memory 1 by doing a Command1.
-
- • Note that under m at the right side of the Response window a 1 has been displayed to
- indicate that you have information stored for that memory.
-
- • Look under the Box Menu and open the Box Dimensions window.
-
- • There are three recommended enclosure dimensions to choose from which have good
- side to side ratios. Close window when done. (use a Command W from the keyboard)
-
- Continue for Vented Box Evaluation
-
- II. Vented Box Evaluation
-
- • If you want to design a vented enclosure, enter the frequency that you want to tune
- the box to, 40 Hz for example, in the Box Freq field, FB, followed by return.
-
- • Notice that the minimum recommended vent area, Sv MIN, has been calculated.
-
- • Do a Command F from the keyboard to see what the curve will look like tuned to 40 Hz.
-
- • Experiment with various frequencies until you find the curve that you want.
-
- • Store the selected response in memory 2 by doing a Command 2.
-
- • Do a Command E from the keyboard to clear the Response window and recall memory 1,
- the closed box, by typing 1 from the keyboard. The Box Parameters window will be
- refreshed with the contents of the selected memory. Now recall memory 2, the vented
- box, by typing 2.
-
- • Now choose a vent(s) from under the Vent menu. The vent length has been calculated in
- the Lv field. The length listed will be per vent. A vent which gives you a negative
- number would not be feasible.
-
- • Print your report by doing a Command P.
-
- Additional information:
-
- • The On/Off status of each response is shown under the Analysis menu by the checkmark
- at the left of the menu item. Only those responses that are selected are actually calculated.
-
- • You have two choices for the Frequency Response. You can choose between 0 dB Mode
- and dB SPL Mode which can tell you the dB SPL (loudness) of the proposed system.
-