Introduction
The Rockville BluTube WD 70W Tube Amplifier/Home Stereo Receiver combines the warmth of vacuum tube amplification with the efficiency of solid-state technology. Designed for audiophiles and home theater enthusiasts, this unit delivers clear, rich audio for various applications, including music, movies, and gaming. Its versatile connectivity options ensure compatibility with a wide range of audio sources.
Figure 1: Rockville BluTube WD 70W Tube Amplifier/Home Stereo Receiver
Features
- Audiophile-Grade Sound Quality: Delivers 25W x 2 RMS at 8 ohms or 35W x 2 RMS at 4 ohms, with vacuum tube amplification for warm, distortion-free audio.
- Versatile Connectivity: Features Bluetooth 2.1+EDR (33-foot range), HDMI, optical, coaxial, USB, and RCA inputs.
- Customizable Audio Control: Adjustable bass and treble via a 2-band equalizer, plus a VU meter for real-time audio feedback.
- Robust Design: 2-tone silver and wood accent finish with banana plug/binding post outputs for 2 speakers and a headphone output.
- Multi-Use Functionality: Subwoofer output for enhanced bass in home theater setups.
Package Contents
- BluTube WD Tube Amplifier / Receiver
- 5 Foot Tiffany RCA to 3.5MM cable
- 5.5 Foot Power cable
- Owner's Manual
- Product Warranty Card
Figure 2: Included accessories and documentation
Safety Instructions
- Power Source: Ensure the unit is connected to a power supply that matches the voltage specified on the unit.
- Ventilation: Do not block ventilation openings. Ensure adequate airflow around the unit to prevent overheating.
- Water and Moisture: Do not expose the unit to rain, moisture, or liquids. Keep away from sources of water.
- Heat: Do not place the unit near heat sources such as radiators, heat registers, stoves, or other heat-producing appliances.
- Cleaning: Clean only with a dry cloth. Do not use liquid cleaners or aerosol cleaners.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Tubes: Vacuum tubes can become hot during operation. Avoid touching them directly.
Setup
Follow these steps to connect your BluTube WD amplifier to your audio system:
- Speaker Connection: Connect your passive speakers to the speaker terminals on the rear panel. Ensure correct polarity (positive to positive, negative to negative) for each speaker. The terminals accept bare speaker wire or single banana cables.
- Audio Source Connection: Connect your desired audio sources (TV, laptop, CD/DVD player, etc.) to the appropriate input ports on the rear panel (RCA, HDMI, Optical, Coaxial).
- Power Connection: Plug the power cable into the AC IN port on the rear panel and then into a wall outlet.
- Power On: Press the Power button on the front panel to turn on the unit. The vacuum tubes will glow, indicating operation.
Figure 3: Rear Panel Connections
Front Panel Controls
The front panel provides easy access to all essential controls:
- Power Button: Turns the amplifier on or off.
- USB Input: Connect a USB flash drive to play music files (WAV/MP3/WMA/APE/FLAC formats supported).
- Headphone Jack: For private listening. Note: If a subwoofer is connected, turn it off when using headphones.
- Playback Controls: Rewind, fast forward, play/pause for USB/Bluetooth audio.
- Treble Control: Adjusts the high-frequency response.
- Bass Control: Adjusts the low-frequency response.
- VU Meter: Displays the audio output level.
- Input Switch: Selects between Input 1 (RCA), Input 2 (RCA), or Bluetooth/USB/Optical/Coaxial/HDMI.
- Volume Knob: Master volume control for overall output level.
Figure 4: Front Panel Controls
Rear Panel Connections
The rear panel houses all the input and output connections:
- RCA Line Inputs (1 & 2): Connect external audio devices such as CD players, DVD players, laptops, or TVs using RCA cables.
- HDMI Input: Connect devices with HDMI audio output.
- Optical Input: Connect devices with optical digital audio output.
- Coaxial Input: Connect devices with coaxial digital audio output.
- Sub Out: Connect an active subwoofer for enhanced bass.
- Speaker Outputs: Connect passive speakers (4-16Ω impedance). Ensure proper wiring for left and right channels.
- AC IN: Power input for the included power cable.
- Fuse: Replace with the specified fuse type if needed.
Figure 5: Detailed Rear Panel Connections
Operating Instructions
1. Selecting an Input Source:
- Use the Input Switch on the front panel to cycle through available sources: Input 1 (RCA), Input 2 (RCA), or Bluetooth/USB/Optical/Coaxial/HDMI.
2. Bluetooth Pairing:
- Select the Bluetooth input using the Input Switch. The BT LED will blink.
- On your Bluetooth device, search for "BLUTUBE WD" and pair.
- Once paired, the BT LED will glow solid. You can now play audio from your device.
3. USB Playback:
- Insert a USB flash drive containing music files into the USB input port.
- Select the USB input using the Input Switch.
- Use the Playback Controls to manage your music.
4. Adjusting Audio:
- Use the Volume Knob to adjust the overall sound level.
- Adjust the Treble and Bass knobs to fine-tune the sound to your preference or to match different audio sources.
- Monitor the VU Meter to ensure optimal volume levels without clipping.
Video 1: Official product overview and demonstration of the BluTube WD amplifier's features and sound capabilities with various speaker types.
Maintenance
- Cleaning: Dust the unit regularly with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
- Tube Care: The vacuum tubes have a finite lifespan. If you notice a decrease in sound quality or a tube stops glowing, they may need replacement. Consult qualified service personnel for tube replacement.
- Ventilation: Ensure the ventilation holes are clear of obstructions to prevent overheating.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable not connected; Power button off; Blown fuse | Check power cable connection; Press power button; Replace fuse (consult manual for type) |
| No sound | Incorrect input selected; Speaker wires loose/incorrectly connected; Volume too low; Muted source | Select correct input; Check speaker connections and polarity; Increase volume; Unmute source device |
| Distorted sound | Volume too high (clipping); Incorrect EQ settings; Faulty tubes | Lower volume; Adjust bass/treble; Consult service for tube inspection/replacement |
| Bluetooth not connecting | Not in pairing mode; Device too far; Interference | Ensure BluTube WD is in Bluetooth input mode (LED blinking); Move device closer; Reduce interference |
| One channel not working (e.g., right channel) | Loose speaker wire connection; Faulty speaker; Damaged tube or internal component | Check speaker wire connections for the affected channel; Test with a different speaker; Consult service personnel for diagnosis and repair. |
Specifications
- Output Power: 70 Watts (35W x 2 RMS at 4 ohms, 25W x 2 RMS at 8 ohms)
- Frequency Response: 22Hz - 20kHz
- Input Impedance: 47kΩ
- Signal-to-Noise Ratio: ≥86dB
- Input Sensitivity: 300mV
- THD (Total Harmonic Distortion): ≤0.02%
- Connectivity: Bluetooth, HDMI, Optical, Coaxial, USB, RCA
- Speaker Impedance: 4-16Ω
- Dimensions (D x W x H): 13.5" x 13.4" x 8.7"
- Weight: 6.6 lbs
Warranty and Support
The Rockville BluTube WD amplifier comes with a 1-Year Warranty from the manufacturer. For technical support, warranty claims, or service inquiries, please refer to the contact information provided on your Product Warranty Card or visit the official Rockville website.
You can also visit the Rockville Store on Amazon for additional product information and resources.