KGUSS DAC-K3 PRO USB DAC Headphone Amplifierユーザーマニュアル

1.製品オーバーview

The KGUSS DAC-K3 PRO is a versatile audio device functioning as both a professional headphone amplifier and a pre-amplifier. It is designed to enhance audio quality from various digital sources, delivering clear and powerful sound. Its compact design makes it suitable for desktop use.

前面と側面 view of the KGUSS DAC-K3 PRO, showing its compact dimensions (149mm L x 98mm W x 33mm H).

2. パッケージ内容

Upon unboxing your KGUSS DAC-K3 PRO, please verify that all the following items are included:

• DAC-K3 PRO host x1
• ユーザーマニュアル x1
• 電源アダプター 12V1.5A x1
• 適合証明書 x1
• USBケーブルx1

3. 製品の特徴とレイアウト

3.1フロントパネル

閉じる view of the KGUSS DAC-K3 PRO front panel, highlighting the input signal indicator lights, PWR/SELECT button, 3.5mm and 6.35mm headphone outputs, and volume control knob.

• Input Signal Indicator Lights: Indicate the currently selected input (COA, OPT, USB).
• PWR/SELECTボタン: Short press to cycle through input sources. Long press to power the unit on or off.
• Headphone Output Interfaces: Includes both 3.5mm and 6.35mm jacks for headphone connection.
• 音量調整ノブ: Turn clockwise to increase volume, counter-clockwise to decrease. Tap once to mute/unmute. This knob controls both RCA output and headphone output volume.

3.2 背面パネル

Rear panel connections of the KGUSS DAC-K3 PRO, including PC-USB input, Optical input, Coaxial input, RCA line outputs (L/R), and DC 12V power interface.

• PC-USB入力: Connects to a computer or compatible mobile phone for digital audio input.
• OPTICAL (Audio In): Connects to devices with optical audio output (e.g., TV set-top boxes, DVD players).
• COAXIAL (Audio In): Connects to devices with coaxial audio output (e.g., TV set-top boxes, DVD players).
• オーディオ出力（RCA L/R）： Line level RCA outputs for connecting to power ampライブ配信者またはアクティブスピーカー。
• DC 12V電源インターフェース: Connect the provided 12V 1.5A power adapter. Ensure correct polarity (outer negative, inner positive) and use the matching power supply to avoid noise.

3.3 Key Internal Components

The DAC-K3 PRO utilizes high-performance chips for superior audio processing:

• TPA6120A2: A high-fidelity audio power amplifier chip based on current feedback architecture, known for low distortion.
• LME49720AN: An operational amplifier providing balanced sound, excellent dynamics, and a broad soundstage.
• ES9018K2M: A DAC decoder chip that contributes to realistic sound, high index, and strong sound plasticity.
• SA9123L & NE5532: Additional components supporting USB audio and general amplification。

TPA6120A2 Chip

LME49720AN Chip

ES9018K2M Chip

4. セットアップ手順

Follow these steps to set up your DAC-K3 PRO:

1. 電源接続: Connect the provided 12V 1.5A power adapter to the DC 12V input on the rear panel, then plug it into a power outlet.
2. 入力ソース接続: Choose your desired audio input:
   • For PC-USB: Connect the USB cable from your computer to the PC-USB IN port.
   • For Optical: Connect an optical cable from your source device to the OPTICAL IN port.
   • For Coaxial: Connect a coaxial cable from your source device to the COAXIAL IN port.
3. 出力接続:
   • For Headphones: Plug your headphones into either the 3.5mm or 6.35mm jack on the front panel.
   • 事前amplifier Use: Connect RCA cables from the AUDIO OUT (RCA L/R) ports on the rear panel to your power ampライファまたはアクティブスピーカー。
4. 電源オン: Long press the PWR/SELECT button on the front panel to turn on the unit.

5. 操作手順

5.1入力の選択

を短く押す PWR/SELECT button on the front panel to cycle through the available input sources: Coaxial (COA), Optical (OPT), and USB. The corresponding indicator light will illuminate to show the active input.

5.2 音量コントロールとミュート

Rotate the large knob on the right side of the front panel to adjust the volume. Turn clockwise to increase volume and counter-clockwise to decrease. Tap the knob once to mute or unmute the audio output.

5.3 HPA/PRE Automatic Switching

The KGUSS DAC-K3 PRO functioning as a headphone amplifier, with headphones connected to the front panel output.

The DAC-K3 PRO features automatic switching between headphone amplifier (HPA) and pre-amplifier (PRE) modes:

• When no headphones are connected to the 3.5mm or 6.35mm output jacks, the unit automatically operates in pre-ampライファイアーモード。 の amplified signal is output from the RCA ports on the rear panel.
• When headphones are connected to either the 3.5mm or 6.35mm output jacks, the DAC-K3 PRO automatically switches to headphone amplifier mode. In this mode, the audio signal is routed exclusively to the headphone jacks, and the RCA outputs are muted.

6. アプリケーション

The KGUSS DAC-K3 PRO can be integrated into various audio setups:

Diagram illustrating various application scenarios for the KGUSS DAC-K3 PRO, including connections to PCs, phones, set-top boxes, and audio output to active speakers or amplifiers。

• Desktop Audio System: Connect your PC or Mac via USB for high-quality audio playback through headphones or active speakers.
• ホームシアター統合: Use optical or coaxial inputs to connect to TV set-top boxes, CD/DVD players, or gaming consoles, outputting to an amplifier and passive speakers or directly to active speakers.
• Mobile Device Enhancement: Connect compatible mobile phones via USB for improved audio output to headphones.

7. 仕様

Technical specifications for the KGUSS DAC-K3 PRO:

Table displaying the technical specifications and product parameters of the KGUSS DAC-K3 PRO.

8。 トラブルシューティング

If you encounter any issues with your DAC-K3 PRO, please consider the following common troubleshooting steps:

• 電源なし: Ensure the power adapter is securely connected to both the unit and a working power outlet. Verify the power button is long-pressed to turn on the device.
• 音が出ない:
  • Check that the correct input source is selected using the PWR/SELECT button.
  • Verify all audio cables (USB, optical, coaxial, RCA) are securely connected.
  • Ensure the volume knob is not muted and is turned up to an audible level.
  • If using PC-USB, ensure the correct audio output device is selected in your computer's sound settings. Drivers may need to be installed manually on some PCs; contact customer service if needed.
  • If using RCA output, ensure your connected ampスピーカーまたはアクティブ スピーカーの電源がオンになっており、正しい入力に設定されています。
• 歪んだ音:
  • Check cable connections for any loose contacts.
  • 入力ソースの音量が高すぎてクリッピングが発生していないことを確認します。
  • Verify that the power adapter is the correct type (12V 1.5A) and free from interference.
• 断続的な接続: Check all cable connections, especially USB, optical, and coaxial, for secure fit. Try using different cables if possible.

For further assistance, please refer to the contact information provided in the warranty section.

9. 保証とサポート

The KGUSS DAC-K3 PRO comes with a 1年間の保証. For any warranty claims, technical support, or product inquiries, please contact our customer service. Details can be found on the quality warranty card included in your package or by visiting the official KGUSS webサイト。

当社は、お客様に当社製品にご満足いただけるよう全力を尽くしております。