1. Introducció
This manual provides detailed instructions for the installation, operation, and maintenance of your Audio System M850.1D monobloc amplifier. The M850.1D is a high-performance 1-channel amplifier designed for car audio systems, featuring efficient SMD technology and stable operation down to 2 ohms. Proper installation and understanding of its features will ensure optimal performance and longevity of the unit.
2. Informació de seguretat
- Always disconnect the vehicle's negative battery terminal before beginning any installation.
- Assegureu-vos que tot el cablejat estigui correctament encaminat i fixat per evitar danys o curtcircuits.
- Use appropriate gauge power and ground wires as specified for the amppotència de sortida del lifier.
- Instal·leu el ampl'escalfador en un lloc que permeti una ventilació adequada per evitar el sobreescalfament.
- Eviteu instal·lar el fitxer amplifier in areas exposed to moisture or excessive vibration.
- Consulteu un instal·lador professional d'àudio per a cotxes si no teniu cap dubte sobre algun aspecte del procés d'instal·lació.
3. Configuració i instal·lació
Careful installation is crucial for the performance and safety of your amplifier. Follow these steps for proper setup.
3.1 Muntatge del Ampmés viu
Seleccioneu un lloc segur i ben ventilat per muntar-lo amplifier. Ensure there is sufficient space around the unit for airflow, especially around the top-mounted fan. Use the provided mounting hardware to secure the amplifier firmly to a solid surface in the vehicle.

Figura 1: De dalt a baix view of the Audio System M850.1D monobloc amplifier, showing its compact design and heat sink fins.
3.2 Connexions d'alimentació
- GND (terra): Connect this terminal to a clean, unpainted metal surface of the vehicle chassis. Ensure a solid electrical connection. The ground wire should be as short as possible.
- +12V (Alimentació): Connect this terminal directly to the positive terminal of the vehicle's battery. An in-line fuse (not supplied) of appropriate rating must be installed within 18 inches (45 cm) of the battery.
- REM (encesa remota): Connect this terminal to the remote output of your head unit. This signal turns the ampengegar i apagar el lifer amb el sistema d'àudio del cotxe.
3.3 Connexions d'altaveus
Connect your subwoofer(s) to the SPEAKER terminals. The M850.1D is a monobloc amplifier, designed for a single channel output. Ensure the total impedance of the connected speakers is not below 2 ohms for stable operation.
3.4 Entrada de senyal
El amplifier supports both RCA (low-level) and high-level inputs.
- Entrada RCA: Connect RCA cables from your head unit's pre-out to the RCA INPUT jacks on the ampmés viu.
- High-Level Input with Auto-On: If your head unit does not have RCA pre-outs, you can use the high-level input. Connect the speaker output wires from your head unit directly to the high-level input terminals. The amplifier features an automatic turn-on function when using high-level input, eliminating the need for a separate remote wire.

Figura 2: posterior view of the Audio System M850.1D amplifier, showing the power, speaker, and input connections, along with control knobs.
4. Funcionament i ajustos
Un cop instal·lat, ajusteu el ampConfiguració del lificador per a un rendiment so òptim.
4.1 Tauler de control acabatview
Refer to Figure 2 for the location of the following controls:
- COMANDAMENT: Connection for the wired remote control (RTC) for bass level adjustment.
- PAS BAIX (LPF): Variable low-pass filter (30-150 Hz). Adjust this to control the upper frequency limit of the subwoofer.
- SUBSÒNIC: Subsonic filter (10-50 Hz / 24 dB). This filter removes ultra-low frequencies that are inaudible and can damage subwoofers.
- INTENSIFICACIÓ DELS SONS MÉS GREUS: Adjustable bass boost (0-6 dB at 45 Hz). Use this to enhance low-frequency output.
- FASE: Phase adjustment (0-180°). Adjust this to ensure the subwoofer's output is in phase with the rest of the audio system.
- LEVEL (Gain): Control de sensibilitat d'entrada. Ajusteu-ho per adaptar-lo al volum de sortida.tage of your head unit. Start with the lowest setting and gradually increase until desired volume is achieved without distortion.
- MODE D'ENTRADA: Switch for selecting input type (e.g., Low/High).
4.2 Initial Setup Procedure
- Estableix-ho tot amplifier controls (LPF, Subsonic, Bass Boost, Phase, Level) to their minimum or off positions.
- Turn on your head unit and set its volume to about 75% of maximum.
- Augmenta lentament el amplifier's LEVEL (gain) control until you hear slight distortion, then back off slightly.
- Adjust the LPF to blend the subwoofer with your main speakers (typically between 60-100 Hz for subwoofers).
- Adjust the SUBSONIC filter to protect your subwoofer from very low, damaging frequencies (e.g., 20-30 Hz).
- Experiment with the PHASE control to find the setting that provides the most impactful bass.
- Use the BASS BOOST sparingly, as excessive boost can cause distortion and damage.
- Utilize the wired remote control (RTC) for convenient bass level adjustment from the driver's seat.
5. Manteniment
The Audio System M850.1D amplifier requires minimal maintenance. Regular checks can help ensure its longevity.
- Periodically inspect all wiring connections for tightness and corrosion.
- Mantenir el amplifier clean and free of dust and debris. Use a soft, dry cloth for cleaning. Do not use liquid cleaners.
- Ensure the cooling fan and heat sink fins are not obstructed to maintain efficient heat dissipation.
6. Solució De Problemes
Si teniu problemes amb el vostre amplifier, consult the following troubleshooting guide before seeking professional assistance.
| Problema | Causa possible | Solució |
|---|---|---|
| Sense alimentació / Ampel lifier no s'encén |
|
|
| Sense sortida de so |
|
|
| So distorsionat |
|
|
| Ampsobreescalfament del lificador |
|
|
7. Especificacions
Technical specifications for the Audio System M850.1D monobloc ampmés viu.
- Model: M850.1D
- Canals: 1 (Monobloc)
- RMS Power Output (14.4V):
- 1 x 500 W RMS @ 4 Ohms
- 1 x 800 W RMS @ 2 Ohms
- Resposta de freqüència: 10 Hz - 150 Hz
- Filtre de pas baix (LPF): 30-150 Hz
- Filtre subsònic: 10 – 50 Hz / 24 dB
- Intensificació dels sons més greus: 0 – 6 dB a 45 Hz
- Ajust de fase: 0 – 180°
- Tipus d'entrada: RCA (Low-Level) and High-Level with Auto-On
- Voltage: 14.4 Volts (Operating)
- Dimensions (L x A x A): Aproximadament 295 x 50 x 185 mm
- Refrigeració: Top-mounted fan, efficient cooling system
- Característiques especials: SMD technology, Wired Remote Control (RTC) included
8. Garantia i Suport
Specific warranty terms and conditions for the Audio System M850.1D amplifier are typically provided with the product packaging or available from the point of purchase. For technical support or service inquiries, please contact your authorized Audio System dealer or visit the official Audio System weblloc.