Introduction
Thank you for choosing LoopTone MF-YY03 Powered Bookshelf Speakers. These 2.0 stereo active monitors are designed to deliver high-quality audio for various applications, including home entertainment, computers, and record players. This manual provides essential information for safe and optimal use of your speakers.
Important Safety Instructions
- Read these instructions thoroughly before operating the product.
- Keep these instructions for future reference.
- Heed all warnings on the product and in the operating instructions.
- Follow all instructions.
- Do not use this apparatus near water.
- Clean only with a dry cloth.
- Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
- Only use attachments/accessories specified by the manufacturer.
- Unplug this apparatus during lightning storms or when unused for long periods of time.
- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
Package Contents
Please check the box for the following items:
- 1 Pair of LoopTone MF-YY03 Multimedia Professional Studio Monitors
- 1 Instruction Manual
- 1 Remote Control
- 1 Power Cord
- 1 L&R Speaker Connection Cable
- 1 3.5mm to 2RCA Audio Cable
- 1 2RCA to 2RCA Audio Cable

Image: All components included in the LoopTone MF-YY03 package.
Product Overview
The LoopTone MF-YY03 speakers feature a 4-inch woofer and a 2-inch silk dome tweeter for balanced audio reproduction. The active speaker includes control knobs for volume, treble, and bass, along with input selection and playback controls. The rear panel offers multiple connectivity options.

Image: Front and side view of the active speaker with controls.

Image: Detailed view of the 4-inch woofer and 2-inch silk dome tweeter.

Image: Rear panel with LP In, Line In, speaker output, and power switch.

Image: Side control panel with USB, SD/MMC ports, and EQ knobs.
Setup
Follow these steps to set up your LoopTone MF-YY03 speakers:
- Placement: Position the speakers on a stable surface, ensuring adequate ventilation.
- Connect Passive Speaker: Use the provided L&R speaker cable to connect the passive speaker to the active speaker's "SPL-" and "SPL+" terminals. Ensure correct polarity (red to red, black to black).
- Power Connection: Connect the power cord to the active speaker's AC input and then to a power outlet.
- Turn On: Flip the power switch on the rear panel to the "ON" position. The volume indicator light on the side panel will illuminate.
- Select Input Source: Press the "INPUT" button on the side panel or the remote control to cycle through available input sources (Bluetooth, Line In, LP In, USB, SD/MMC).
Video: Demonstrates turning on the speakers, selecting input, and Bluetooth pairing. This video shows the physical controls and connection process for the LoopTone MF-YY03 speakers.
Operating Instructions
Bluetooth Connection
- Ensure the speakers are powered on.
- Press the "INPUT" button until the Bluetooth indicator light (usually the VOL light flashing purple) is active.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for "LoopTone-YY03".
- Select "LoopTone-YY03" to pair. Once connected, the indicator light will stop flashing.
Wired Connections (Line In / LP In)
- Line In: Use the 3.5mm to 2RCA cable or 2RCA to 2RCA cable to connect your audio source (e.g., computer, TV, CD/DVD player) to the "LINE IN" RCA ports on the rear panel. Select "LINE IN" using the INPUT button.
- LP In (Record Player): Connect your vinyl record player to the "LP IN" RCA ports on the rear panel using a 2RCA to 2RCA cable. This input is specifically designed to boost the low volume output of record players. Select "LP IN" using the INPUT button.
USB / SD/MMC Playback
- Insert a USB drive or SD/MMC card into the corresponding slot on the side panel.
- Press the "INPUT" button to select USB or SD/MMC mode.
- Use the "PREV", "PLAY/PAUSE", and "NEXT" buttons on the side panel or remote to control playback.
Sound Adjustment (EQ)
- Volume: Rotate the "VOL" knob on the side panel or use the volume buttons on the remote control.
- Treble/Bass: Rotate the "TREBLE" and "BASS" knobs on the side panel to adjust the high and low frequencies to your preference.
- Preset EQ Modes: Use the remote control to select from 6 preset sound effects: Normal, Classic, Pop, Rock, Jazz, Vocal, Monitor.

Image: Remote control for selecting EQ modes and adjusting sound.
Maintenance
- Cleaning: Wipe the speaker surfaces with a soft, dry cloth. Do not use liquid cleaners or aerosols.
- Ventilation: Ensure the speakers have adequate airflow and do not block ventilation openings.
- Storage: If storing for an extended period, unplug the speakers and keep them in a cool, dry place.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord not connected; Power switch off | Ensure power cord is securely plugged in; Turn power switch to ON. |
| No sound | Incorrect input source selected; Volume too low; Cables not connected properly | Press INPUT to select correct source; Increase volume; Check all audio cables. |
| Bluetooth not pairing | Speakers not in pairing mode; Device Bluetooth off; Too far from speakers | Ensure Bluetooth input is selected (flashing light); Turn on device Bluetooth; Move device closer to speakers. |
| Distorted sound | Volume too high; Source audio quality poor; Incorrect EQ settings | Lower volume; Check source audio; Adjust Treble/Bass knobs or EQ presets. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | MF-YY03 |
| Speaker Type | Monitor, Bookshelf |
| Speaker Maximum Output Power | 70 Watts RMS |
| Surround Sound Channel Configuration | 2.0 |
| Woofer Diameter | 4 Inches |
| Tweeter Diameter | 2 Inches (52 Millimeters) Silk Dome |
| Frequency Response | Up to 20 KHz |
| Signal-to-Noise Ratio | 78 dB |
| Connectivity Technology | Bluetooth, USB, SD/MMC, Auxiliary (3.5mm, 2RCA), LP Input |
| Wireless Communication Technology | Bluetooth |
| Bluetooth Range | 10 Meters |
| Control Method | Remote, On-speaker knobs/buttons |
| Material | Wood (MDF), Metal, Plastic, Silk |
| Product Dimensions | 6.9"D x 6.3"W x 9.8"H |
| Item Weight | 11.08 pounds |
| Input Voltage | 120 Volts |
Warranty & Support
LoopTone provides a limited warranty for this product. For detailed warranty information, please refer to the warranty card included in your package or contact LoopTone customer support. For technical assistance or service inquiries, please visit the official LoopTone website or contact their customer service team.



