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

1. Réamhrá

1.1 Táirge Tharview

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 Faisnéis Sábháilteachta

• Dícheangail críochfort diúltach ceallraí na feithicle i gcónaí sula dtosaíonn tú ar aon suiteáil.
• Cinntigh go bhfuil an sreangú go léir inslithe i gceart chun gearrchiorcaid a chosc.
• Mount the LoC-22 securely in a dry location, away from excessive heat or moisture.
• Téigh i gcomhairle le suiteálaí fuaime gluaisteáin gairmiúil mura bhfuil tú cinnte faoi aon chuid den phróiseas suiteála.
• Do not attempt to modify the unit. Unauthorized modifications may void the warranty and pose safety risks.

2. Gnéithe

• 2-Channel Speaker-Level to RCA Line Output Conversion
• Rialú Leibhéal Aschuir Inchoigeartaithe
• Selectable Turn-On Mode (DC Offset or Signal Sensing)
• Selectable Input Load (Low Z or Normal)
• Dearadh Dlúth agus Marthanach
• Integrated Remote Turn-On Output for Aftermarket Ampardaitheoirí

3. Ábhar Pacáiste

• JL AUDIO LoC-22 Line Output Converter Unit
• Wiring Harnesses (for power/remote and speaker inputs)
• Lámhleabhar Úsáideora (an doiciméad seo)

4. Táirge Tharview and Component Identification

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

Seo ó bharr anuas 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

seo 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. Socrú agus Suiteáil

5.1 Gléasta

• Choose a secure, dry location within the vehicle, away from direct heat sources or moving parts.
• Cinntigh go bhfuil aeráil leordhóthanach timpeall an aonaid.
• Use appropriate screws to mount the LoC-22 to a solid surface using its integrated mounting tabs.

5.2 Naisc Sreangaithe

Before making any connections, ensure the vehicle's battery negative terminal is disconnected.

1. Ceangal Cumhachta: 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. Speaker-Level Inputs: 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. RCA Line Outputs: Connect standard RCA cables from the LoC-22's 'Line Outputs' to the RCA inputs of your aftermarket amplitheoir.
4. Remote Turn-On Output: Connect the 'Remote Out' terminal of the LoC-22 to the remote turn-on input of your aftermarket ampLifier. Casfaidh sé seo air an amplifier when the LoC-22 detects an audio signal or DC offset, depending on the selected turn-on mode.

6. Treoracha Oibriúcháin

6.1 Turn-on Mode Selection

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

• Fritháireamh DC: 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.
• Comhartha: 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 Adjusting Output Level

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 ampleachtaitheoir stage.

7. Cothabháil

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.
• Ná húsáid ceimiceáin ghránna nó glantóirí scríobacha.
• Seiceáil gach nasc sreangaithe go tréimhsiúil lena chinntiú go bhfuil siad slán agus saor ó chreimeadh.

8. Fabhtcheartú

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

9. Sonraíochtaí

10. Faisnéis Bharántas

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 websuíomh.

11. Tacaíocht do Chustaiméirí

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 websuíomh:

www.jlaudio.com/tacaíocht

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