1. Giriş
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.

Resim 1.1: Ön view of the Audison AP BMW S8-4 Prima Series Subwoofer.
2. Kutuda Neler Var?
İçeriği dikkatlice açın ve tüm eşyaların mevcut olduğundan emin olun:
- Audison AP BMW S8-4 Subwoofer(s)
- Two (2) 5 mm polyurethane gaskets
- Crossover (if applicable to your system configuration)
- Montaj vidaları
- Kullanım kılavuzu (bu belge)
- Garanti bilgileri

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

Image 2.2: Included 5mm polyurethane gaskets for optimal fit.
3. Özellikler
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 Ses Bobini: 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.
- 4 Ohm Empedans: The S8-4 model is designed with a 4 ohm impedance, suitable for system configurations where amplifiers can be bridged to deliver higher power.

Resim 3.1: View of the subwoofer cone and central voice coil area.
4. Özellikler
| Şartname | Değer |
|---|---|
| Model Numarası | APBMW-S8-4 |
| Bileşen | Woofer |
| Güç Kullanımı (Sürekli) | 150W RMS |
| Güç Kullanımı (Tepe) | 300W |
| Empedans | 4 Ohm |
| Frekans Tepkisi | 35 ÷ 500Hz |
| Ürün Ağırlığı | 3 pound (1.36 kg) |
| Ürün Boyutları (U x G x Y) | 9.41 x 9.41 x 7.52 inç (23.9 x 23.9 x 19.1 cm) |
| Ses Bobini Çapı | 38 mm |
| Mıknatıs Tipi | Neodimyum |

Image 4.1: Technical drawing illustrating the dimensions of the subwoofer.
5. Kurulum ve Kurulum
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. Kurulum Öncesi Kontroller
- Verify the subwoofer's impedance (4 Ohms for S8-4) is compatible with your ampLifier'ın çıktısı.
- Montaja başlamadan önce aracın aküsünün bağlantısının kesildiğinden emin olun.
- Confirm the factory under-seat enclosure is clean and free of debris.
5.2. Kurulum Adımları
- 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.

Resim 5.1: Yan profile of the subwoofer, highlighting its compact design for under-seat installation.
6. Çalıştırma
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
- Kurulum tamamlandıktan sonra, aracınızın ses sistemini düşük ses seviyesinde açın.
- 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 ampcankurtaran.
6.2. System Tuning
For the best audio experience, consider the following:
- Geçiş Ayarları: Alçak geçiş filtresini ayarlayın. 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.
- Faz Ayarı: Faz ayarıyla (0° veya 180°) denemeler yapın. amplifier or head unit to achieve the most cohesive bass response with your front speakers.
- Kazanç Ayarı: Ayarla ampÇıkış ses seviyesine uyacak şekilde yükseltici kazancıtage of your head unit. Avoid setting the gain too high, as this can lead to distortion and potential damage.
- Dijital Ses İşlemcisi (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. Bakım
The Audison AP BMW S8-4 subwoofer requires minimal maintenance to ensure long-term performance.
- Temizlik: Periodically clean the subwoofer's grille and surrounding areas with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
- Çevresel Faktörler: Protect the subwoofer from excessive moisture, extreme temperatures, and direct sunlight, which can degrade materials over time.
- Denetleme: Occasionally inspect the wiring connections to ensure they remain secure and free from corrosion.
8. Sorun Giderme
If you encounter issues with your Audison AP BMW S8-4 subwoofer, refer to the following common troubleshooting steps:
8.1. Subwoofer'dan Ses Gelmiyor
- Bağlantıları Kontrol Edin: Ensure all power, ground, remote, and signal cables are securely connected to both the amplifier ve subwoofer.
- Amplifier Durumu: Şunu doğrulayın: amplifier is powered on (indicated by a power light) and not in protection mode.
- Araç Ses Sistemi Ayarları: Confirm that the subwoofer output is enabled and the volume is turned up on your head unit.
- Sigorta Kontrolü: Denetleyin amplifier's fuse and the main power fuse for the audio system. Replace if blown.
8.2. Distorted or Weak Bass
- Kazanç Ayarı: Ayarla amplifier gain. If set too high, it can cause distortion. If too low, it can result in weak bass.
- Geçiş Ayarları: Incorrect crossover settings can lead to distortion or a lack of impact. Adjust the low-pass filter.
- Faz: Incorrect phase can cause cancellation with other speakers, leading to weak bass. Adjust the phase setting.
- Muhafaza Bütünlüğü: Ensure the subwoofer is properly sealed within its enclosure. Air leaks can cause poor performance.
8.3. Intermittent Sound
- Gevşek Bağlantılar: 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. Garanti ve Destek
The Audison AP BMW S8-4 Subwoofer comes with a 1 Yıllık Üretici GarantisiBu garanti, normal kullanım koşullarında malzeme ve işçilik hatalarını kapsar.
9.1. Garanti Talepleri
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. Teknik Destek
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 webGaranti bilgilerine web sitemizden veya ürününüzle birlikte gelen garanti dokümanından ulaşabilirsiniz.





