JL AUDIO LoC-22 | 2-Channel High-to-Low Line Output Converter

1. Introduction

1.1 Produit terminéview

The JL AUDIO LoC-22 is a 2-channel line output converter designed to integrate aftermarket amplifiers with factory car audio systems that lack RCA pre-amp outputs. It efficiently converts high-level (speaker-level) audio signals from a factory head unit or amplifier into low-level (RCA pre-amp level) signals, making them compatible with aftermarket amplifiers. This device is essential for upgrading your car's audio system while retaining the original head unit.

1.2 Consignes de sécurité

• Débranchez toujours la borne négative de la batterie du véhicule avant de commencer toute installation.
• Veillez à ce que tous les câbles soient correctement isolés afin d'éviter les courts-circuits.
• Mount the LoC-22 securely in a dry location, away from excessive heat or moisture.
• Consultez un installateur audio automobile professionnel si vous avez des doutes sur une quelconque étape du processus d'installation.
• Do not attempt to modify the unit. Unauthorized modifications may void the warranty and pose safety risks.

2. Caractéristiques

• 2-Channel Speaker-Level to RCA Line Output Conversion
• Contrôle du niveau de sortie réglable
• Selectable Turn-On Mode (DC Offset or Signal Sensing)
• Selectable Input Load (Low Z or Normal)
• Conception compacte et durable
• Integrated Remote Turn-On Output for Aftermarket Amplifier

3. Contenu du colis

• JL AUDIO LoC-22 Line Output Converter Unit
• Wiring Harnesses (for power/remote and speaker inputs)
• Manuel de l'utilisateur (ce document)

4. Produit terminéview et identification des composants

Familiarize yourself with the various components and connections of your LoC-22 unit.

Figure 4.1: JL AUDIO LoC-22 Angled View

This image provides an overall angled view of the LoC-22 unit, highlighting its compact size and the general layout of its inputs, outputs, and controls. The black metal casing is visible, along with mounting tabs on the sides.

Figure 4.2: JL AUDIO LoC-22 Top View

Ce top-down view clearly shows the main labels and controls on the unit's surface. Key indicators include 'Input Load', 'Clipping' LED, 'Output Level' potentiometer, 'Line Outputs' (RCA jacks), and the 'Turn-on Mode' switch. The JL Audio logo and 'LoC-22 Line Output Converter' text are also prominent.

Figure 4.3: JL AUDIO LoC-22 Input Side View

This image details one side of the LoC-22, specifically showing the multi-pin terminal block for speaker-level inputs (L+, L-, R+, R-). Below the input terminal, the 'Input Load' switch is visible, offering 'Low Z (60 Ω)' and 'Normal (20 kΩ)' settings for impedance matching.

Figure 4.4: JL AUDIO LoC-22 Output Side View

Ce view displays the opposite side of the LoC-22. It features the power connector terminal block (+12V, Ground, Remote Out), the two RCA 'Line Outputs' (Left and Right), and the 'Turn-on Mode' switch, which can be set to 'DC Offset' or 'Signal' for automatic turn-on functionality.

5. Configuration et installation

5.1 Montage

• Choose a secure, dry location within the vehicle, away from direct heat sources or moving parts.
• Assurez une ventilation adéquate autour de l'appareil.
• Use appropriate screws to mount the LoC-22 to a solid surface using its integrated mounting tabs.

5.2 Connexions de câblage

Avant d'effectuer tout branchement, assurez-vous que la borne négative de la batterie du véhicule est déconnectée.

1. Connexion électrique : Connect the +12V terminal of the LoC-22 to a constant +12V power source (e.g., directly to the battery with an inline fuse, or a fused accessory wire). Connect the Ground terminal to a solid chassis ground point.
2. Entrées au niveau des haut-parleurs : Connect the speaker output wires from your factory head unit or amplifier to the LoC-22's speaker input terminal block (L+, L-, R+, R-). Ensure correct polarity.
3. Sorties ligne RCA : Connect standard RCA cables from the LoC-22's 'Line Outputs' to the RCA inputs of your aftermarket amplifier.
4. Remote Turn-On Output: Connect the 'Remote Out' terminal of the LoC-22 to the remote turn-on input of your aftermarket amplifier. This will turn on the amplifier when the LoC-22 detects an audio signal or DC offset, depending on the selected turn-on mode.

6. Mode d'emploi

6.1 Turn-on Mode Selection

The LoC-22 offers two methods for automatic turn-on:

• Décalage CC : Select this mode if your factory head unit or amplifier produces a DC offset on its speaker outputs when turned on. This is the most common and reliable method for many modern factory systems.
• signal: Select this mode if your factory head unit or amplifier does not produce a DC offset, but instead provides an audio signal when turned on. The LoC-22 will detect the presence of an audio signal to generate the remote turn-on output.

Set the 'Turn-on Mode' switch on the unit to the appropriate setting based on your vehicle's factory system.

6.2 Input Load Selection

The 'Input Load' switch allows you to optimize the LoC-22's input impedance for compatibility with various factory audio systems:

• Normal (20 kΩ): This is the standard setting and should work with most factory systems.
• Low Z (60 Ω): Some factory systems, particularly those with advanced diagnostic features, may require a lower impedance load to prevent them from detecting an open circuit and shutting down the audio output. If you experience audio cut-outs or errors, try this setting.

Set the 'Input Load' switch on the unit to the appropriate setting. Start with 'Normal' and switch to 'Low Z' if issues arise.

6.3 Réglage du niveau de sortie

The 'Output Level' potentiometer allows you to match the output voltage of the LoC-22 to the input sensitivity of your aftermarket amplifier. This ensures optimal signal transfer and prevents clipping.

1. Turn the 'Output Level' control fully counter-clockwise (minimum).
2. Turn on your car's audio system and play a dynamic piece of music at about 75% of the head unit's maximum volume.
3. Slowly turn the 'Output Level' control clockwise until the 'Clipping' LED on the LoC-22 just begins to flicker. Then, back off slightly until the LED remains off.
4. Adjust the gain controls on your aftermarket amplifier according to its manufacturer's instructions, ensuring no clipping occurs at the amplifier stage.

7. Entretien

The JL AUDIO LoC-22 is designed for reliable operation with minimal maintenance.

• Keep the unit clean and free of dust. Use a soft, dry cloth for cleaning.
• N'utilisez pas de produits chimiques agressifs ou de nettoyants abrasifs.
• Vérifiez régulièrement tous les branchements électriques pour vous assurer qu'ils sont bien fixés et exempts de corrosion.

8. Dépannage

If you encounter issues with your LoC-22, refer to the table below for common problems and solutions.

9. Spécifications

10. Informations sur la garantie

JL AUDIO products are engineered and manufactured to the highest quality standards. This product is covered by a limited warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary by region and product. Please retain your proof of purchase for warranty claims. For detailed warranty information, please refer to the warranty card included with your product or visit the official JL AUDIO website.

11. Assistance clientèle

For technical assistance, troubleshooting, or general inquiries regarding your JL AUDIO LoC-22, please contact JL AUDIO customer support. You can find contact information, FAQs, and additional resources on the official JL AUDIO website:

www.jlaudio.com/support

When contacting support, please have your product model number (LoC-22) and a detailed description of your issue ready.