ATV420: How To Set Up & Use

Introduction

The Rockville ATV420 is a 4-channel waterproof Bluetooth amplifier designed for UTVs, ATVs, and motorcycles. This guide will walk you through wiring, input/output connections, head unit setup, and Bluetooth pairing to get the best performance from your amplifier.

What’s Included

• Rockville ATV420 amplifier
• Power and speaker wiring
• Four mounting screws
• Extra fuse
• Cover removal tool
• High-level input adapters (for factory radios)

Step 1: Wiring the Power and Ground

1. Locate your vehicle’s battery.
2. Connect the power cables:
   • Red wire → 12V positive terminal of the battery.
   • Black wire → Ground terminal of the battery.
   • Blue wire → Ignition or accessory power (so the amplifier powers on when the vehicle is started).

Step 2: Connecting Speakers

The ATV420 has four speaker output channels:

• Channel 1 (Left Speaker): White (positive), White/Black (negative).
• Channel 2 (Right Speaker): Gray (positive), Gray/Black (negative).
• Channel 3 (Left Speaker): Green (positive), Green/Black (negative).
• Channel 4 (Right Speaker): Purple (positive), Purple/Black (negative).

Speaker Setup Options

• 4 speakers at 4 ohms (one per channel).
• 2 speakers at 2 ohms (one per channel).
• Bridging 2 channels for a subwoofer at 4 ohms (connect the positive of one channel and the negative of another channel).

Step 3: RCA Inputs for a Head Unit

The ATV420 has RCA inputs for connecting a head unit:

• If your head unit has TWO RCA outputs (front & rear) → Use 4-channel input mode.
• If your head unit has ONE RCA output → Use 2-channel input mode so all speakers play the same audio.

Connecting RCA Cables

1. Plug RCA cables into the outputs on your receiver.
2. Connect the other ends to the RCA inputs on the amplifier:
   • Front channels → RCA inputs for channels 1 & 2.
   • Rear channels → RCA inputs for channels 3 & 4.
3. Set input voltage switch:
   • Low (for aftermarket head units with RCA pre-outs).
   • High (for factory radios, using the included high-level adapters).

Step 4: Adjusting Crossover Settings

1. Remove the cover using the included tool to access the tuning knobs.
2. Use the crossover switch and frequency knob to fine-tune audio:
   • Off → Full-range sound.
   • High-pass filter (HPF) → Only plays frequencies above the selected setting (ideal for full-range speakers).
   • Low-pass filter (LPF) → Only plays frequencies below the selected setting (ideal for subwoofers).
3. Adjust gain levels to balance the audio.

Step 5: Bluetooth Pairing

1. Set the amplifier to Bluetooth mode.
2. Go to your smartphone’s Bluetooth settings.
3. Search for "ATV420" and select it to pair.
4. Once paired, play music wirelessly.

Note: If Bluetooth is disconnected, the amplifier will default to the RCA connection.

Conclusion

Setting up the Rockville ATV420 is simple, whether using Bluetooth, a head unit, or direct speaker connections.

Key Takeaways

Connect power cables correctly to avoid damage.
Match your speaker setup with the right impedance (2 ohm or 4 ohm).
Choose the right input mode based on your head unit’s RCA outputs.
Fine-tune audio with crossover and gain settings.
Enjoy Bluetooth wireless streaming for a hassle-free music experience.