1. المقدمة
This manual provides detailed instructions for the installation, operation, and maintenance of the Audison AP BMW S8-4 Prima Series 8-inch (200mm) Subwoofer. This subwoofer is specifically designed for direct replacement of OEM speakers in BMW vehicles, optimizing performance within the factory under-seat enclosure.

الصورة 1.1: الجبهة view of the Audison AP BMW S8-4 Prima Series Subwoofer.
2. ماذا يوجد في الصندوق
قم بفك محتويات العبوة بعناية وتأكد من وجود جميع العناصر:
- Audison AP BMW S8-4 Subwoofer(s)
- Two (2) 5 mm polyurethane gaskets
- Crossover (if applicable to your system configuration)
- مسامير التثبيت
- دليل المستخدم (هذه الوثيقة)
- معلومات الضمان

Image 2.1: Product packaging for the Audison AP BMW S8-4 Subwoofer.

Image 2.2: Included 5mm polyurethane gaskets for optimal fit.
3. المميزات
The Audison AP BMW S8-4 Subwoofer incorporates several design elements for enhanced performance and compatibility:
- Neodymium Magnetic Group: Maximizes performance while minimizing bulk and weight.
- BMW-Mini Optimized Electroacoustic Parameters: Engineered to deliver powerful and clear low frequencies, utilizing the acoustic load provided by the factory enclosure.
- 38 mm Voice Coil: Wound on an aluminum support for significant power dissipation and stability, even during high excursions.
- ABS Plastic Basket: Reinforced with fiberglass for durability and minimal installation depth.
- Front Magnet Design: Contributes to a minimal installation depth, ensuring compatibility with the entire range of BMW under-seat enclosures.
- مقاومة 4 أوم: The S8-4 model is designed with a 4 ohm impedance, suitable for system configurations where amplifiers can be bridged to deliver higher power.

الصورة 3.1: View of the subwoofer cone and central voice coil area.
4. المواصفات
| مواصفة | قيمة |
|---|---|
| رقم الموديل | APBMW-S8-4 |
| عنصر | مكبر صوت |
| التعامل مع الطاقة (مستمر) | 150 وات جذر متوسط التربيع |
| التعامل مع الطاقة (الذروة) | 300 واط |
| مقاومة | 4 أوم |
| استجابة التردد | 35 ÷ 500 هرتز |
| وزن العنصر | 3 رطل (1.36 كجم) |
| أبعاد المنتج (الطول × العرض × الارتفاع) | 9.41 × 9.41 × 7.52 بوصة (23.9 × 23.9 × 19.1 سم) |
| قطر الملف الصوتي | 38 ملم |
| نوع المغناطيس | نيوديميوم |

Image 4.1: Technical drawing illustrating the dimensions of the subwoofer.
5. الإعداد والتثبيت
The Audison AP BMW S8-4 subwoofer is designed for a direct replacement installation in BMW vehicles, specifically fitting into the factory under-seat enclosures. Professional installation is recommended to ensure optimal performance and avoid damage to the vehicle's electrical system.
5.1. فحوصات ما قبل التثبيت
- Verify the subwoofer's impedance (4 Ohms for S8-4) is compatible with your ampمخرجات الحياة.
- تأكد من فصل بطارية السيارة قبل البدء في التثبيت.
- Confirm the factory under-seat enclosure is clean and free of debris.
5.2. خطوات التثبيت
- Carefully remove the existing OEM speaker from the under-seat enclosure. Refer to your vehicle's service manual for specific removal procedures.
- Place the provided 5 mm polyurethane gaskets onto the subwoofer's mounting surface. These gaskets ensure a perfect seal and decouple the subwoofer from vibrations within the enclosure.
- Position the Audison AP BMW S8-4 subwoofer into the factory enclosure. The design allows for a minimal installation depth, ensuring a proper fit.
- Secure the subwoofer using the provided mounting screws. Do not overtighten.
- Connect the subwoofer wiring to your amplifier. Pay close attention to polarity (+/-) to ensure correct phase.
- Reconnect the vehicle's battery and proceed to system testing.

الصورة 5.1: الجانب المحترفfile of the subwoofer, highlighting its compact design for under-seat installation.
6. التشغيل
Once installed, proper tuning of your audio system is crucial for optimal subwoofer performance. The AP BMW S8-4 is designed to integrate seamlessly with your vehicle's acoustics.
6.1. Initial Power-Up and Testing
- بعد التثبيت، قم بتشغيل نظام الصوت في سيارتك على مستوى صوت منخفض.
- Listen for any unusual noises or distortion. If present, immediately turn off the system and re-check all connections.
- Gradually increase the volume and adjust the subwoofer level on your head unit or ampمكبر.
6.2. System Tuning
For the best audio experience, consider the following:
- إعدادات التقاطع: Set the low-pass filter on your amplifier or head unit to prevent higher frequencies from reaching the subwoofer. A common starting point is around 80-100 Hz, but this may vary based on your full-range speakers.
- تعديل المرحلة: جرب ضبط الطور (0° أو 180°) على جهازك amplifier or head unit to achieve the most cohesive bass response with your front speakers.
- إعداد المكسب: ضبط ampكسب مكبر الصوت لمطابقة مستوى صوت الإخراجtage of your head unit. Avoid setting the gain too high, as this can lead to distortion and potential damage.
- Digital Sound Processor (DSP): If using a DSP (e.g., Audison AP 8.9 bit), utilize its capabilities for precise equalization, time alignment, and crossover adjustments to maximize the subwoofer's performance.
7. الصيانة
The Audison AP BMW S8-4 subwoofer requires minimal maintenance to ensure long-term performance.
- تنظيف: Periodically clean the subwoofer's grille and surrounding areas with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
- العوامل البيئية: Protect the subwoofer from excessive moisture, extreme temperatures, and direct sunlight, which can degrade materials over time.
- تقتيش: Occasionally inspect the wiring connections to ensure they remain secure and free from corrosion.
8. استكشاف الأخطاء وإصلاحها
If you encounter issues with your Audison AP BMW S8-4 subwoofer, refer to the following common troubleshooting steps:
8.1. لا يوجد صوت من مضخم الصوت الفرعي
- التحقق من الاتصالات: Ensure all power, ground, remote, and signal cables are securely connected to both the ampالمضخم ومكبر الصوت الفرعي.
- Ampحالة المحفز: تأكد من أن amplifier is powered on (indicated by a power light) and not in protection mode.
- إعدادات وحدة التحكم الرئيسية: Confirm that the subwoofer output is enabled and the volume is turned up on your head unit.
- فحص الصمامات: فحص amplifier's fuse and the main power fuse for the audio system. Replace if blown.
8.2. Distorted or Weak Bass
- إعداد المكسب: ضبط amplifier gain. If set too high, it can cause distortion. If too low, it can result in weak bass.
- إعدادات التقاطع: Incorrect crossover settings can lead to distortion or a lack of impact. Adjust the low-pass filter.
- مرحلة: Incorrect phase can cause cancellation with other speakers, leading to weak bass. Adjust the phase setting.
- سلامة العلبة: Ensure the subwoofer is properly sealed within its enclosure. Air leaks can cause poor performance.
8.3. Intermittent Sound
- الاتصالات الفضفاضة: Re-check all wiring for any loose or corroded connections.
- Signal Cable Interference: Ensure RCA cables are routed away from power cables to prevent noise.
If these steps do not resolve the issue, contact Audison customer support or a qualified car audio technician.
9. الضمان والدعم
The Audison AP BMW S8-4 Subwoofer comes with a ضمان المصنع لمدة عاميغطي هذا الضمان عيوب المواد والصناعة في ظل الاستخدام العادي.
9.1. مطالبات الضمان
To make a warranty claim, please retain your proof of purchase and contact your authorized Audison dealer or Audison customer support. The warranty does not cover damage caused by improper installation, abuse, accident, neglect, or unauthorized modification.
9.2. الدعم الفني
For technical assistance, installation guidance, or further inquiries, please visit the official Audison website or contact their customer support department. Contact information can typically be found on the Audison webيمكنك الاطلاع على معلومات الموقع أو في وثائق الضمان المرفقة مع المنتج.