Set the radio bass and treble adjust to "0" or "neutral". Adjust the radio volume to an average level. Use music that you are familiar with. This is helpful to
find the optimal adjustments.
Now slowly turn up the input sensitivity until the sound quality seems balanced. Do not adjust the input sensitivity too high, as distortion may occur. Too high
radio volume will also cause significant distortion. Make sure that the sound of the other speakers is undistorted before you continue. Reduce the radio
volume when you hear audible distortion.
After the input sensitivity has been adjusted, set your lowpass filter according to the highpass filters of the other speakers. We recommend 75Hz, which is
center position. Adjusting the lowpass filter changes the sound of the subwoofer. Repeat steps 3 and 4 until the optimum is found. Last adjustment is the phase
shift.
Turn the control very slowly between 0° and 180° while listening to music in the usual listening position. Listen to the sound and keep the adjustment position
that sounds best and most balanced in its spectrum. The optimal adjustment depends on many acoustical factors and shape of the vehicle, as well as the
distance of the subwoofer to the listening position. EN 4. 5. 6. ALPINE ELECTRONICS MARKETING, INC. 1-1-8 Nishi Gotanda, Shinagawa-ku, Tokyo
141-0031, Japan Phone 03-5496-8231 ALPINE ELECTRONICS OF CANADA, INC. 7300 Warden Ave., Suite 203, Markham, Ontario L3R 9Z6, Canada
Phone 1-800-ALPINE-1 (1-800-257-4631) ALPINE ELECTRONICS OF AMERICA, INC.
19145 Gramercy Place, Torrance, California 90501, U.S.A. Phone 1-800-ALPINE-1 (1-800-257-4631) ALPINE ELECTRONICS OF AUSTRALIA PTY. LTD.
6-8 Fiveways Boulevarde Keysborough, Victoria 3173, Australia Phone 03-9769-0000 ALPINE ELECTRONICS GmbH Frankfurter Ring 117 80807
München, Germany Tel. 089-3242640 ALPINE ELECTRONICS OF U.K. LTD. Alpine House Fletchamstead Highway, Coventry CV4 9TW, U.
K. Phone 0870-33 33 763 ALPINE ELECTRONICS FRANCE S.A.R.L.
(RCS PONTOISE B 338 101 280) 98, Rue de la Belle Etoile, Z.I. Paris Nord Il, B.P. 50016, 95945 Roissy Charles de Gaulle Cedex, France Phone
01-48638989 ALPINE ITALIA S.
p.A. Viale C. Colombo 8, 20090 Trezzano Sul Naviglio (MI), Italy Phone 02-484781 ALPINE ELECTRONICS DE ESPAÑA, S.A. Portal de Gamarra 36,
Pabellón, 32 01013 Vitoria (Alava)-APDO 133, Spain Phone 945-283588 10 ALPINE ELECTRONICS (Benelux) GmbH Leuvensesteenweg 510-B6 1930
Zaventem, Belgium Tel..
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SWD-2030 user guide
http://somemanuals.com/dref/1080394
