1. Introduction
The TOPPING E50 II is a high-resolution audio Digital-to-Analog Converter (DAC) designed to deliver exceptional sound quality for various audio setups. Featuring an AK4497S DAC chip, app control, DSD512/PCM768kHz support, LDAC Bluetooth, and a 10-band parametric equalizer, the E50 II offers versatile performance for both home and professional audio environments. This manual provides detailed instructions for setting up, operating, and maintaining your device.
2. Safety Information
- Do not disassemble or modify the device. Unauthorized modifications may void the warranty and pose safety risks.
- Avoid exposing the device to water, moisture, or extreme temperatures.
- Use only the specified power adapter (5V DC) to prevent damage.
- Ensure proper ventilation around the device to prevent overheating.
- Keep the device away from strong magnetic fields.
- Unplug the device during lightning storms or when unused for extended periods.
3. Package Contents
Please check the package for the following items:
- TOPPING E50 II DAC Unit
- Quick Start Guide
- USB Cable
- Power Adapter (5V DC)
- Bluetooth Antenna
- Remote Control
4. Product Overview
4.1 Front Panel
The front panel features a display screen and a multi-function button for power and selection.
Figure 4.1: Front view of the TOPPING E50 II DAC, showing the display and control button.
4.2 Rear Panel
The rear panel provides various input and output connections for audio sources and amplifiers.
Figure 4.2: Rear view of the TOPPING E50 II DAC, displaying balanced TRS outputs, unbalanced RCA outputs, coaxial input, optical input, USB-C data input, USB-C power input, and Bluetooth antenna connector.
4.3 Key Features
- Smartphone App Control: Seamless integration with the TOPPING Home app for real-time control of inputs, outputs, EQ, and volume.
- Premium AK4497S DAC Performance: Equipped with AKM AK4497S VELVET SOUND DAC chip for detailed and immersive sound.
- DAC & Preamp Modes: Switchable modes with RCA and TRS outputs, selectable output levels, and remote control support.
- Flagship High-Resolution USB Audio: XMOS XU316 supports DSD64–DSD512 (Native) and PCM up to 768kHz/32-bit.
- Advanced 10-Band PEQ Tuning: High-precision parametric EQ with independent left/right channel control via TOPPING software.
- Dual-Format Optical & Smart Detection: FPGA-based intelligent optical input automatically detects S/PDIF and ADAT formats (44.1kHz–192kHz).
- Ultra-Low Jitter Digital Architecture: FPGA + PLL TopSync circuit with JitterNull technology for suppressed jitter.
- Hi-Res Wireless Bluetooth Audio: Qualcomm QCC5125 enables LDAC, aptX Adaptive/HD, AAC, and SBC for up to 96kHz/24-bit streaming.
5. Setup
5.1 Power Connection
- Connect the provided USB power adapter to the USB-C POWER port on the rear panel of the E50 II.
- Plug the power adapter into a suitable wall outlet.
5.2 Input Connections
The E50 II supports multiple digital audio inputs:
- USB Input: Connect your computer or other USB audio source to the USB-C DATA port using a USB cable.
- Coaxial Input: Connect a coaxial digital audio source to the COAXIAL port.
- Optical Input: Connect an optical digital audio source to the OPTICAL port.
- Bluetooth Input: Screw the Bluetooth antenna onto the BT connector on the rear panel. Enable Bluetooth on your source device and pair with "E50 II".
5.3 Output Connections
The E50 II offers both balanced and unbalanced analog outputs:
- Balanced Outputs (TRS): Connect to balanced inputs of an amplifier or active speakers using 6.35mm TRS cables.
- Unbalanced Outputs (RCA): Connect to unbalanced inputs of an amplifier or active speakers using RCA cables.
Figure 5.3: Close-up of the rear panel showing the balanced TRS and unbalanced RCA output options, allowing connection to various audio systems.
6. Operation
6.1 Basic Controls
- Power On/Off: Press and hold the front panel button to power the device on or off.
- Input Selection: Short press the front panel button to cycle through available inputs (USB, Coaxial, Optical, Bluetooth).
- Volume Control: If in Preamp mode, use the remote control to adjust the volume.
6.2 App Control (TOPPING Home)
The TOPPING E50 II can be controlled via the TOPPING Home smartphone app, offering comprehensive settings adjustments.
Video 6.2.1: An overview of the TOPPING E50 II's features, including app control and various connectivity options. This video demonstrates the device's functionality and integration within an audio setup.
Figure 6.2.2: A smartphone screen displaying the TOPPING Home app interface, showing options for volume control, input settings, output settings, and advanced configurations for the E50 II.
6.3 Parametric Equalizer (PEQ)
The E50 II features a 10-band high-precision parametric equalizer. This can be configured via the TOPPING software (accessible through the app or a dedicated computer application) to fine-tune the frequency response. You can adjust frequency bands, gain, and Q factor independently for left and right channels, save user profiles, and import target curves.
Figure 6.3: A screenshot of the 10-band parametric equalizer interface, showing adjustable frequency, gain, and Q factor settings for precise audio customization.
6.4 DAC and Preamp Modes
The E50 II can operate in two modes:
- DAC Mode: The device outputs a fixed line-level signal, suitable for connecting to a dedicated preamplifier or integrated amplifier.
- Preamp Mode: The device provides variable volume control, allowing it to directly drive a power amplifier or active speakers. This mode can be selected via the app or device settings.
7. Maintenance
- Clean the device with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- Ensure all connections are secure and free from dust.
- Store the device in a cool, dry place when not in use.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | Incorrect input selected, volume too low, faulty cables, incorrect output mode. | Verify input selection, increase volume, check cable connections, ensure correct DAC/Preamp mode. |
| Device does not power on | Power adapter not connected, faulty power adapter. | Ensure power adapter is securely connected and plugged into a working outlet. Try a different 5V DC power source if available. |
| Bluetooth connection issues | Antenna not connected, device not in pairing mode, interference. | Ensure Bluetooth antenna is attached. Put E50 II into Bluetooth pairing mode (refer to app or quick start guide). Reduce distance to source device, minimize interference. |
| Distorted audio | Input signal too high, faulty cables, incorrect settings. | Reduce source volume, check cables, reset PEQ settings if enabled. |
9. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 6.1 x 5.08 x 0.04 inches; 1.65 Pounds |
| Item Model Number | E502 |
| Manufacturer | TOPPING |
| Maximum Supply Voltage | 5 Volts (DC) |
| Minimum Supply Voltage | 5 Volts (DC) |
| Number of Pins | 2 |
| Interface Type | Coaxial, Optical, RCA, USB |
| DAC Chip | AKM AK4497S |
| USB Processor | XMOS XU316 |
| Max USB Sampling Rate | DSD512 (Native), PCM 768kHz/32-bit |
| Bluetooth Codecs | LDAC, aptX Adaptive/HD, AAC, SBC |
| Outputs | RCA (unbalanced), TRS (balanced) |
10. Warranty and Support
For warranty information and technical support, please refer to the warranty card included with your product or visit the official TOPPING website. Contact details for customer service are typically provided on the manufacturer's website or in the quick start guide.
