By Daniel Ferguson
Проектирование и построение автомобильных акустических систем продолжают быть комбинацией искусства и науки. В этой книге описаны 20 полных иллюстрированных проектов акустических систем для разных видов транспортных средств. Шаг за шагом, от проекта до монтажа. Contents advent IX Acknowledgments xv bankruptcy 1 entrance SPEAKER tasks 1 Spacer earrings 2 Two-Way part process thirteen bankruptcy 2 REAR SPEAKER initiatives FOR SEDANS 23 The Triax 24 Bandpass/Coax mix forty two Bass Couplers 60 bankruptcy three REAR SPEAKER structures FOR HATCHBACKS sixty seven method I sixty nine method II eighty one extra strength 87 bankruptcy four REAR SPEAKER structures FOR PICKUP vans ninety nine ordinary Cabs ninety nine excellent news a hundred approach assessments 108 different probabilities 111 CHAPTERS REAR SPEAKER platforms FOR vehicles AND activity software cars 12S trucks 12S activity software cars 128 Jeep Wrangler process 128 bankruptcy 6 extra ON SPEAKER cupboard development 147 development ideas 149 instruments a hundred and fifty approach 151 different chances 167 In end a hundred and eighty bankruptcy 7 THE clear out CROSSOVER 181 readability 182 Circuit functionality 185 Chassis guidance 189 meeting 193 Bench attempt 197 ultimate meeting 198 functionality 201 checking out in Use 205 eventually ... 208 bankruptcy eight easy SPEAKERBUILDING 209 review 209 Thiele-Small Parameters 210 Impedance dimension 211 making a choice on Qrs 213 choosing VAS 216 Two-Way Crossover layout 219 Measured reaction 225 Circuit research 226 a few Observations on Speaker layout Shareware 229 My Spreadsheets 232 research of instance Thiele-Small Sixth-Order Alignment procedure 237 end 240 References 241 assets 243 Index 245
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Extra resources for Car Stereo Speakers Illustrated
We have not one but two systems to install in this location-the rear mains and the subwoofers. We will make the assumption that available space is limited to the package shelf under the rear window. The challengeand it's a big one-is to do all this while utilizing the existing factory cutouts. Now there are many car stereo enthusiasts out there who think that an acceptable solution to the sedan sub woofer dilemma is to simply place a large box system in the trunk with no direct coupling to the passenger compartment.
12 SO 71 74 71 OS at 30 Hz to be slightly asymmetric, indicating that the woofer is producing some distortion at 100 dB that is significantly reduced at 40 Hz in Photo 2-20b. Higher frequencies all appear to be sinusoidal. Finally For a purely subjective analysis, I cOlUlected a portable CD player to the test setup and played music through it. It sounded smooth and full. I then plumped up the bass by increasing the woofer volume and reduced the woofer crossover frequency to reflatten the midbass.
This block must be securely fastened and be as perpendicular to the workbench surface as possible. 3. Next, cut a piece of scrap to a length equal to the width of the saw plus the length of the side and top pieces-12% in. Use this 45 Rear Speaker Systems for Sedans Photo 2-22 measuring tool to set the length of cut for each of the four pieces as shown. The first cut is shown in Photo 2-23. Again, set the depth of cut to barely penetrate the workbench surface. 4. Cut the hole for the 8-in woofer in the baffle board as shown in Photo 2-24.