pengenalan
The S.M.S.L SD-793II is a high-performance Digital-to-Analog Converter (DAC) with an integrated headphone amplifier. It is designed to convert digital audio signals from various sources into high-fidelity analog audio, suitable for connection to amplifiers, active speakers, or headphones. This manual provides essential information for the proper setup, operation, and maintenance of your SD-793II unit.
Figure A: The S.M.S.L SD-793II unit, a compact digital to analog converter with integrated headphone amplebih hidup.
Ciri-ciri Produk
- Utilizes the advanced DIR9001 digital receiver chip, supporting up to 24-bit/96KHz signal reception.
- Incorporates the high-quality PCM1793 D/A converter chip for 192K/24Bit audio conversion.
- Features an active low-pass filter output with an OPA2134 operational amplifier, which can be changed by the user for sound customization.
- Supports both coaxial and optical fiber digital audio inputs with a convenient switch.
- Integrated headphone amplifier with a 6.35mm headphone jack on the front panel.
- Provides both RCA and headphone jack analog audio outputs.
- Constructed with a durable aluminum shell, precision CNC processed, with an oxidized finish and a custom solid aluminum anti-skid volume knob.
Kandungan Pakej
Sila semak pakej untuk item berikut:
- S.M.S.L SD-793II DAC Unit
- Penyesuai Kuasa (DC 9V)
- Panduan Mula Pantas
Jika terdapat sebarang barang yang hilang atau rosak, sila hubungi peruncit anda.
Figure B: The S.M.S.L SD-793II unit shown with its power adapter and retail packaging.
Arahan Keselamatan
- Bekalan Kuasa: Gunakan hanya penyesuai kuasa yang disediakan. Pastikan volumtage sepadan dengan bekalan kuasa tempatan anda.
- Pengudaraan: Jangan halang sebarang bukaan pengudaraan. Pastikan aliran udara yang mencukupi di sekitar unit untuk mengelakkan terlalu panas.
- Air dan Kelembapan: Jangan dedahkan unit kepada hujan, lembapan atau cecair menitis/percikan. Jangan letakkan objek yang diisi dengan cecair, seperti pasu, pada unit.
- Sumber Haba: Jauhkan unit daripada sumber haba seperti radiator, daftar haba, dapur, atau radas lain (termasuk amppenghidup) yang menghasilkan haba.
- Servis: Jangan cuba servis produk ini sendiri. Rujuk semua perkhidmatan kepada pegawai perkhidmatan yang berkelayakan.
- Pembersihan: Unplug the unit from the power outlet before cleaning. Use a dry, soft cloth only.
Persediaan
- Sambungkan Kuasa: Insert the DC 9V power adapter into the "DC+9V" input jack on the rear panel of the SD-793II. Plug the adapter into a wall outlet.
- Connect Digital Audio Source:
- Input Optik: Connect an optical fiber cable from your digital audio source (e.g., TV, CD player, game console) to the "OPTICAL" input on the rear panel.
- Input sepaksi: Connect a coaxial cable from your digital audio source (e.g., DVD player, computer sound card) to the "COAXIAL" input on the rear panel.
Penting: Ensure your digital audio source is configured to output PCM stereo audio. Multichannel formats like Dolby Digital or DTS are not supported and may result in no sound or clicking noises.
- Connect Analog Audio Output:
- Keluaran RCA: Connect RCA cables from the "R OUT" (right) and "L OUT" (left) jacks on the rear panel to your amplifier, active speakers, or other analog audio input device.
- Output Fon Kepala: For private listening, plug your headphones into the 6.35mm headphone jack on the front panel.
Figure 1: Rear panel connections of the SD-793II, illustrating optical, coaxial digital inputs, RCA analog outputs, and the DC 9V power input.
Figure 2: Front panel controls of the SD-793II, including the power button, input select button, 6.35mm headphone jack, and volume control knob.
Arahan Operasi
- Hidupkan/Mati Kuasa: Press the "POWER" button on the front panel to turn the unit on or off. An indicator light will illuminate when the unit is powered on.
- Pilih Input: Press the "SELECT" button on the front panel to switch between the optical and coaxial digital inputs. The corresponding indicator light will show the active input.
- Laraskan Kelantangan Fon Kepala: Rotate the large knob on the front panel to adjust the volume for the connected headphones. This control only affects the headphone output. The RCA line output is fixed.
Penyelenggaraan
- Pembersihan: Use a soft, dry cloth to wipe the exterior of the unit. Do not use liquid cleaners or solvents.
- Storan: Jika menyimpan unit untuk tempoh yang lama, putuskan sambungannya daripada bekalan kuasa dan simpan di tempat yang sejuk dan kering.
- Penggantian Komponen: The OPA2134 operational amplifier is user-changeable. If you choose to replace it, ensure the unit is powered off and unplugged. Exercise caution and refer to appropriate guides for safe component handling.
Menyelesaikan masalah
- Tiada Keluaran Bunyi:
- Ensure the unit is powered on and the power adapter is securely connected.
- Verify that the correct input (Optical or Coaxial) is selected using the "SELECT" button.
- Check all audio cable connections (digital input, RCA output, headphone).
- Confirm that your digital audio source is outputting PCM stereo audio, not a multichannel format (e.g., Dolby Digital, DTS). Adjust source settings if necessary.
- If using headphones, ensure the volume knob is turned up.
- Test with a different audio source or output device to isolate the problem.
- Kualiti Bunyi Herot atau Lemah:
- Periksa sambungan kabel yang longgar.
- Ensure the digital audio source is set to PCM stereo output.
- Sahkan bahawa sample rate and bit depth of the input signal are within the supported range (up to 24-bit/96KHz for DIR9001, 192K/24Bit for PCM1793).
- If using headphones, ensure they are properly connected and not damaged.
- Clicking Noise from Unit:
- A mechanical relay inside the unit may produce a click when the audio signal starts or stops, or when switching sources. This is normal operation.
- If continuous clicking occurs, ensure your digital audio source is set to PCM stereo output, not a multichannel format.
- Unit Tidak Dihidupkan:
- Check the power adapter connection to both the unit and the wall outlet.
- Pastikan alur keluar dinding berfungsi.
- Cuba salur keluar kuasa yang berbeza.
Spesifikasi
| Antara muka input | Coaxial or Optical Fiber (with switch) |
| Kekerapan Input | 44.1, 48, 96 KHz / 16 / 24 BIT |
| Nisbah Isyarat-ke-Kebisingan (SNR) | > 113 dB |
| Julat Dinamik | 105 dB |
| Distortion (1 KHz) | < 0.0006% |
| Output Dinilai | 1.7 VPP |
| Respons Kekerapan | 20 - 20 KHz (-0.2 dB) |
| Jumlah Kuasa Keluaran | < 8 W |
| Kuasa Output Fon Kepala | 65 mW @ 16Ω; 130 mW @ 32Ω |
| Headphone Output Distortion | 0.01% THD + N @ 100mW/32Ω |
| Bilangan Saluran | 2 |
| Dimensi Produk | 8.9 x 6.7 x 2.5 inci |
| Berat Barang | 14.4 auns |
| Nombor Model | SD793II |
Maklumat Waranti
S.M.S.L products are designed and manufactured to the highest quality standards. Specific warranty terms and conditions may vary by region and retailer. Please retain your proof of purchase for any warranty claims. For detailed warranty information, refer to the documentation provided with your purchase or contact your authorized S.M.S.L dealer.
Sokongan Pelanggan
For technical assistance, troubleshooting, or service inquiries, please contact your local S.M.S.L distributor or the retailer from whom you purchased the product. You may also visit the official S.M.S.L webtapak untuk sumber tambahan dan maklumat hubungan.
