Application |
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Subwoofers in general have excellent |
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power handling characteristics over their |
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operational bandwidth. This bandwidth is |
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determined by many factors, including driver |
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design, and enclosure type. It is possible to |
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overdrive any subwoofer driver by sending |
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powerful signals outside of its operational | FIG. 5 LIMITED EXCURSION | |
bandwidth. These potentially damaging signals | ||
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can be removed by adding a subsonic filter. Figure 5 shows the effectiveness of the Hawkins Bass Control on woofer excursion in a vented enclosure. The woofer travels 7.5 mm at 10 Hz. With Hawkins Bass Control properly adjusted, this excursion can be reduced to less than 1 mm. This is of great benefit to lowering woofer distortion and increasing output.
Adjustment
An easy method of optimizing your existing subwoofer enclosure with Hawkins’ “Hz” control is as follows:
1.Adjust frequency and boost control to full COUNTER - CLOCKWISE position.
2.Set the bass control switch to “HAWKINS BASS CONTROL”.
3.While listening to music with strong bass content at a moderate level, slowly adjust frequency control clockwise. Listen for a reduction of bass response. Now, rotate frequency control slightly backwards. This serves the purpose of removing the “subsonic” bass energy.
With Soundstream’s Hawkins Bass Control, the boost and frequency control can provide virtually any combination of boost and 
cut to suit your designs.
So, Hawkins Bass Control can provide the 
“tailoring” needed for any type of “assisted” 
design and any woofer in any type of 
installation.
FIG. 6 VARIOUS SETTINGS
Phase Switch
In many car audio systems placement of the subwoofers can cause them to be out of phase with the rest of the system. This may cause poor subwoofer performance due to varying arrival times. To eliminate this the Human Reign Unreashed incorporates a 0 to 180
phase switch. By playing low frequency music and experimenting with the subwoofer phasing better sound quality and bass imaging may be obtained.
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