1. はじめに
The eppfun B55 is a versatile Bluetooth 5.3 audio receiver and transmitter adapter designed to upgrade your audio experience. It supports aptX HD, aptX LL, and aptX Adaptive codecs, ensuring high-quality, low-latency wireless audio. This device can function in two primary modes: Receiver (RX) mode to stream audio from your phone/computer to wired speakers, and Transmitter (TX) mode to send audio from non-Bluetooth devices (like TVs or computers) to Bluetooth headphones or speakers. It also supports connecting up to two devices simultaneously in TX mode.
2. パッケージ内容
パッケージに以下の項目が含まれているか確認してください。
- eppfun B55 Bluetooth Adapter
- 3.5mmオーディオケーブル
- USB-C Cable (for power)
- ユーザーマニュアル（このドキュメント）
3.製品オーバーview およびインターフェース
- USB-C電源入力: 電源に接続します。
- 3.5mm RX Input: Audio input for Receiver mode.
- 3.5mm TX Input: Audio input for Transmitter mode.
- 再生/一時停止ボタン: Controls audio playback. Double-click to enter search mode, long press for 5 seconds to reset.
- LED Indicators (A and B): Indicate current mode and connection status.
4. セットアップと操作
4.1 電源のオン/オフ
- Connect the USB-C cable to the adapter and a 5V USB power source (e.g., wall adapter, computer USB port). The device will power on automatically.
- To power off, disconnect the USB-C cable.
4.2 Mode Selection (Automatic)
The device automatically switches between Transmitter (TX) and Receiver (RX) modes based on the audio cable connection:
- TXモード： When the audio cable is plugged into the TX interface, the device defaults to transmission mode.
- RXモード： When the audio cable is inserted into the RX interface, the device automatically switches to reception mode.
4.3 受信（RX）モードの動作
In RX mode, the B55 receives Bluetooth audio from your smartphone, tablet, or computer and outputs it to a wired audio system.
- Connect the 3.5mm audio cable from the B55's RX入力 to your wired speaker, car audio system, or amplifier。
- Ensure the B55 is powered on. The 'B' LED indicator should be lit.
- On your smartphone or other Bluetooth-enabled device, search for "eppfun B55" in the Bluetooth settings and pair with it.
- Once connected, audio from your device will stream wirelessly to your wired audio system.
4.4 送信（TX）モードの動作
In TX mode, the B55 transmits audio from non-Bluetooth devices to Bluetooth headphones or speakers.
- Connect the 3.5mm audio cable from your audio source (e.g., TV, computer, TV box) to the B55's TX入力.
- Ensure the B55 is powered on. The 'A' LED indicator should be lit.
- Bluetooth ヘッドフォンまたはスピーカーをペアリング モードにします。
- Double-click the Play/Pause button on the B55 to enter search mode. The B55 will automatically search for and connect to nearby Bluetooth receiving devices.
- Once connected, audio from your source device will stream wirelessly to your Bluetooth headphones/speaker.
4.5 Connecting Two Devices in TX Mode
The B55 supports connecting to two Bluetooth receiving devices simultaneously in TX mode (e.g., two pairs of headphones for shared TV viewing）。
- Connect the B55 to your audio source (e.g., TV) via the 3.5mm TX input.
- Pair the first Bluetooth headphone/speaker as described in section 4.4.
- 最初のデバイスが接続されたら、2 番目の Bluetooth ヘッドフォン/スピーカーをペアリング モードにします。
- Double-click the Play/Pause button on the B55 again to search for and connect the second device.
5. 仕様
| 特徴 | 仕様 |
|---|---|
| 製品モデル | B55 |
| Bluetoothバージョン | 5.3 |
| ワイヤレスタイプ | ブルートゥース |
| インタフェース | 3.5MM、タイプC |
| オーディオインターフェース | USB-C / 3.5mm AUX |
| 送信モード | Receive/Transmit (RX/TX) |
| 伝送距離 | ≤ 20m（65フィート） |
| Apt-xをサポート | Yes (aptX HD/LL/Adaptive) |
| 製品素材 | ABS素材 |
| 互換性 | Automatic downward compatibility recognition (V4.0, V4.1, V4.2, V5.0) |
6。 トラブルシューティング
- 電源なし: Ensure the USB-C cable is securely connected to a 5V power source. Try a different USB port or power adapter.
- ペアリングできません:
- Ensure the B55 is in the correct mode (TX or RX) for your intended use.
- Make sure your receiving/transmitting device is in pairing mode.
- Double-click the Play/Pause button on the B55 to initiate search mode.
- デバイスを互いに近づけます。
- Long press the Play/Pause button for 5 seconds to reset the B55 and try pairing again.
- 音声なし:
- Check all audio cable connections (3.5mm).
- Ensure the volume on both the B55 and your connected audio devices is turned up.
- Verify that the B55 is successfully paired and connected to your desired device.
- Confirm the correct audio input/output is selected on your source/receiving device.
- Audio Lag/Stuttering:
- Move the B55 and connected devices closer to reduce interference.
- デバイス間に大きな障害物（壁、大きな金属物）がないことを確認してください。
- エリア内の他の無線アクティビティを最小限に抑えます。
- The B55 supports aptX LL/HD/Adaptive for low latency, ensure your connected device also supports these codecs for optimal performance.
- Connecting Two Headphones in TX Mode: If you have trouble connecting a second pair of headphones, ensure the first pair is already connected, then put the second pair into pairing mode and double-click the B55's Play/Pause button to search for it.
7. メンテナンス
- デバイスを乾燥した状態に保ってください。湿気は内部回路に損傷を与える可能性があります。
- デバイスを極端な温度にさらさないでください。
- デバイスが損傷する可能性があるため、落下や強い衝撃を避けてください。
- 柔らかく乾いた布でデバイスを拭いてください。刺激の強い化学薬品や洗剤は使用しないでください。
- デバイスを使用しないときは、清潔でほこりのない環境に保管してください。
8. ユーザーのヒント
- Dual Headphone Connection: Yes, you can connect two headphones via Bluetooth to watch TV in Transmitter (TX) mode. First, connect the B55 to your TV's audio output (e.g., 3.5mm headphone jack). Then, pair the first Bluetooth headphone. Once connected, put the second headphone into pairing mode and double-click the B55's Play/Pause button to connect it.
- 車の使用: When using the B55 in RX mode in a car, ensure it is powered via a USB port (e.g., car charger) as AUX interface devices typically require a power supply.
- 最適な範囲: For the best wireless performance and to avoid signal interference, try to keep the adapter within 20 meters (65 feet) of your connected Bluetooth devices.
9. 保証とサポート
保証情報や技術サポートについては、eppfunの公式ウェブサイトをご覧ください。 web当サイトをご覧いただくか、販売店にお問い合わせください。保証請求のために購入時の領収書を保管してください。
