1.製品オーバーview
The Gustard DAC-R26 II is a high-performance R2R Streamer Digital-to-Analog Converter designed for audiophiles and professional audio setups. It features a fully discrete 26-bit R-2R resistor ladder network, supporting high-resolution audio formats up to DSD2048 and PCM 32-bit/768kHz. This device integrates advanced streaming capabilities, a high-precision clock, and a custom Class-A LPF circuit to deliver natural, detailed, and immersive sound reproduction.
画像1.1：正面 view of the Gustard DAC-R26 II, showcasing its design and highlighting key features such as R2R architecture, 1-Bit DSD support, XMOS, Femto Clock, CPLD, GCLK-02, IIS, and Bluetooth 5.1.
2. セットアップと接続
2.1 開梱
すべての部品をパッケージから慎重に取り出します。以下のものがすべて揃っていることを確認してください。
- Gustard DAC-R26 II Unit
- リモートコントロール
- ガスタードカード（保証書/ご案内）
- 電源コード
- USBケーブル
2.2電源接続
Connect the provided power cord to the AC inlet on the rear panel of the DAC-R26 II and then to a suitable AC power outlet. The unit supports AC115V/230V 50/60Hz, with manual switching. Ensure the voltage switch is set correctly for your region before powering on.
2.3 入力/出力接続
The DAC-R26 II offers a comprehensive range of digital inputs and analog outputs for versatile connectivity:
- デジタル入力： COAX, AES, OPT (Optical), USB, IIS (I2S), LAN (Ethernet for streaming), 10MHz Clock Input (BNC).
- アナログ出力: RCA (unbalanced), XLR (balanced).
Connect your digital audio sources (e.g., computer, CD transport, network streamer) to the appropriate digital input ports. Connect the RCA or XLR analog outputs to your amplifier、preampリスナー、またはアクティブスピーカー。
画像2.1: 内部 view highlighting the GCLK-02 clock module and power supply components, crucial for stable signal performance and overall audio quality.
3. 操作
3.1 基本操作
After connecting the power and audio cables, press the power button on the front panel or use the remote control to turn on the unit. Use the input selector button on the front panel or remote to cycle through the available digital inputs (COAX, AES, OPT, USB, IIS, LAN, Bluetooth) until your desired source is selected. The display will indicate the active input and current audio format.
3.2 ハイレゾオーディオ再生
The DAC-R26 II supports a wide range of high-resolution audio formats:
- COAX/AES/OPT Input: PCM 16-24bit/44.1-192kHz; DSD DoP64.
- USB/Streamer Input: PCM 16-32bit/44.1-768kHz; DSD DoP64-DOP256; NATIVE DSD: DSD64-DSD512.
- IIS Input: PCM 16-32bit/44.1-1536kHz; NATIVE DSD: DSD64-DSD2048 (DSD2048: @ DSD direct mode).
For optimal DSD playback, utilize the DIRECT DSD mode via the IIS interface, which preserves the original bitstream integrity.
3.3 ネットワークストリーミング
Connect the DAC-R26 II to your local network via the LAN port. The device supports mainstream streaming protocols such as AirPlay, UPnP, Spotify, NAA, and Roon Bridge. For network bridge configuration, open a web browser on a device connected to the same network and navigate to http://r26.local.
Image 3.1: Illustration of the Network Bridge System, showing compatibility with various streaming services and the web 構成用のインターフェイス。
3.4 Bluetooth接続
The DAC-R26 II features Bluetooth 5.1 with support for LDAC, AAC, SBC, and aptX codecs, powered by a Qualcomm QCC5125 chip. To pair, select the Bluetooth input on the DAC, then search for 'Gustard DAC-R26 II' on your Bluetooth-enabled device and connect.
Image 3.2: Details on the XMOS XU216 USB interface supporting PCM768K and DSD512, alongside the Bluetooth 5.1 module with supported codecs.
4. メンテナンス
To ensure the longevity and optimal performance of your Gustard DAC-R26 II, follow these maintenance guidelines:
- クリーニング： Use a soft, dry cloth to clean the exterior of the unit. Avoid using liquid cleaners, aerosols, or abrasive materials, as they may damage the finish or internal components.
- 換気： Ensure the unit is placed in a well-ventilated area. Do not block the ventilation slots. Proper airflow prevents overheating and maintains stable operation.
- 環境： Keep the DAC away from direct sunlight, heat sources, excessive dust, and moisture. The operating temperature should not exceed 50 degrees Celsius.
- 電源を切る： When not in use for extended periods, it is recommended to power off the unit and disconnect it from the AC outlet.
5。 トラブルシューティング
If you encounter issues with your DAC-R26 II, refer to the following common troubleshooting steps:
- 電源なし:
- 電源コードが本体とACコンセントの両方にしっかりと接続されているか確認してください。
- ACボリュームを確認するtage switch on the rear panel is set correctly for your region.
- Test the AC outlet with another device to ensure it is functional.
- サウンド出力なし:
- Ensure the correct input source is selected on the DAC.
- Verify that the analog output cables (RCA or XLR) are securely connected to both the DAC and your amplifier / preamplifier。
- 音量レベルを確認してください amplifier / preamplifier。
- Confirm that your audio source is playing and sending a signal.
- 歪んだ音:
- ケーブル接続が緩んでいないか確認してください。
- を確認してくださいample rate and bit depth settings on your audio source match the DAC's capabilities for the selected input.
- If using USB, try reinstalling the USB driver on your computer if applicable.
- ネットワークストリーミングの問題:
- Ensure the LAN cable is securely connected and your network is active.
- Verify that your streaming device and the DAC are on the same local network.
- Restart your network router and the DAC.
これらの手順を試しても問題が解決しない場合は、カスタマー サポートにお問い合わせください。
6. 技術仕様
Detailed specifications for the Gustard DAC-R26 II:
| カテゴリ | 仕様 |
|---|---|
| Digital Inputs (COAX/AES/OPT) | PCM 16-24bit/44.1-192kHz; DSD DoP64 |
| Digital Inputs (USB/Streamer) | PCM 16-32bit/44.1-768kHz; DSD DoP64-DOP256; NATIVE DSD: DSD64-DSD512 |
| Digital Inputs (IIS) | PCM 16-32bit/44.1-1536kHz; NATIVE DSD: DSD64-DSD2048 (DSD2048: @ DSD direct mode) |
| 10M Input Interface (BNC) | Input impedance 50 Ohm, 0dBm-20dBm, CMOS square wave 0.2V-3.3V, sine wave 0.5-3.3V |
| 周波数応答 | 20-20kHz /±0.2dB OS mode |
| ダイナミックレンジ | >117デシベル |
| 信号対ノイズ比 | >122デシベル |
| チャネルクロストーク | <-134dB @ 1kHz |
| THD+N | <=0.003% @1kHz |
| 内分泌腫瘍 | ≈0.008% @ 0dbfs |
| RCA出力レベル | 2.5Vrms(音量固定) |
| RCA出力インピーダンス | 100Ω |
| XLR Output Level | 5.0Vrms(音量固定) |
| XLR Output Impedance | 100Ω |
| AC電源 | AC115V/230V 50/60Hz (Manual switching) |
| 消費電力 | <20W |
| シャーシ寸法（幅×奥行き×高さ） | 330 x 260 x 65 mm (No pins included 10mm) |
| 重さ | 5.5キロ |
| 上限温度定格 | 摂氏50度 |
| Bluetoothバージョン | 5.1 (Supports LDAC/AAC/SBC/aptX, Qualcomm QCC5125) |
| USB Interface Chip | XMOS XU216 |
Image 6.1: Close-up of the proprietary discrete R-2R architecture design by Gustard, showcasing the 26-bit module for natural audio reproduction.
画像6.2: 詳細 view of internal components related to native 1-Bit DSD processing, emphasizing the unit's capability for high-fidelity audio.
7. 保証情報
The Gustard DAC-R26 II typically comes with a 2-year warranty. Please refer to the Gustard Card included in your package or contact your retailer for specific warranty terms and conditions, as coverage may vary by region and seller. Keep your proof of purchase for warranty claims.
8. カスタマーサポート
For technical assistance, troubleshooting, or warranty inquiries, please contact your retailer or the manufacturer, Gustard. You may also visit the AOSHIDA store on Amazon for additional product information and support resources:
