PRE-70V: How To Set Up w/ A 70 Volt Amplifier

Introduction

The Rockville PRE-70V preamp works as the control center for your audio system, while the amplifier powers the connected speakers. This guide will walk you through properly wiring the preamp to an amplifier, ensuring smooth operation without unwanted noise or power issues.

Step 1: Understanding the Connection

The PRE-70V preamp manages input sources (microphones, music, Bluetooth, etc.) and zone volume control, while the amplifier powers the speakers.

Basic Wiring Flow:

1. Connect the outputs of the preamp → inputs of the amplifier
2. Connect the outputs of the amplifier → inputs of the preamp

This loop ensures that the preamp controls the audio while the amplifier powers the system.

Step 2: Gather Your Equipment

✅ Rockville PRE-70V Preamp
✅ Power Amplifier
✅ Speaker Wire (at least four sets)
✅ Small Flathead Screwdriver (for terminal connections)

Step 3: Connecting the Preamp to the Amplifier

Step 3.1: Connecting Preamp Outputs to Amplifier Inputs

1. Locate the Left and Right Output Terminals on the back of the PRE-70V preamp.
2. Use the flathead screwdriver to loosen the terminals.
3. Connect the red (positive) wire to the positive output terminal of the preamp.
4. Connect the black (negative) wire to the negative output terminal of the preamp.
5. Take the other ends of the speaker wire and insert them into the corresponding Left and Right input terminals on the amplifier.
   • Some amplifiers may label these as Channel 1 and Channel 2 instead of Left and Right.

Step 3.2: Connecting Amplifier Outputs Back to the Preamp

1. Locate the Output Terminals on the back of the amplifier.
2. Loosen the terminals with a flathead screwdriver.
3. Connect another set of speaker wires:
   • Red (positive) wire → Positive output terminal on the amplifier.
   • Black (negative) wire → Negative output terminal on the amplifier.
4. Take the other ends of the speaker wire and insert them into the Left and Right 70V Input terminals on the PRE-70V preamp.

Step 4: Powering On Your System (Recommended Order)

To avoid loud popping sounds or power surges, follow this sequence when turning on your system:

1. Turn on the amplifier first.
2. Turn on the preamp second.
3. Once both are powered on, connect speakers and music sources (Bluetooth, MP3, optical, or line input) to the preamp.

Conclusion

Connecting your Rockville PRE-70V preamp to an amplifier is straightforward when following the correct wiring sequence. With your system properly set up, you can now control music sources, zone volumes, and microphones through the preamp, while the amplifier efficiently powers your speakers.