రేడియల్ J48 MK2 48V ఫాంటమ్ పవర్ యాక్టివ్ డైరెక్ట్ బాక్స్ యూజర్ మాన్యువల్

1. పరిచయం

The Radial J48 MK2 is an active direct box designed to convert unbalanced instrument signals into balanced, low-impedance signals suitable for professional mixing consoles and recording equipment. It operates on 48V phantom power, providing a wide, distortion-free frequency response and dynamic range for various instruments. This manual provides essential information for the proper setup, operation, and maintenance of your J48 MK2.

2. భద్రతా సమాచారం

Please read and understand all safety instructions before operating this device.

• ప్రతిపాదన 65 హెచ్చరిక: ఈ ఉత్పత్తిలో క్యాన్సర్ మరియు జనన లోపాలు లేదా ఇతర పునరుత్పత్తి హాని కలిగించే కాలిఫోర్నియా రాష్ట్రానికి తెలిసిన రసాయనాలు ఉండవచ్చు.
• వర్షం లేదా తేమకు యూనిట్‌ను బహిర్గతం చేయవద్దు.
• Do not open the chassis; there are no user-serviceable parts inside. Refer all servicing to qualified personnel.
• ఆపరేషన్ సమయంలో యూనిట్ చుట్టూ సరైన వెంటిలేషన్ ఉండేలా చూసుకోండి.
• Use only with 48V phantom power sources as intended.

3. ఉత్పత్తి ముగిసిందిview

The Radial J48 MK2 is engineered for optimal performance with modern instruments, offering robust construction and transparent audio conversion. Its features include a unique switch-mode power supply for high rail voltage, ensuring signal integrity even with dynamic sources.

ముఖ్య లక్షణాలు:

• Active 48-Volt phantom powered operation.
• High rail voltage to prevent clipping with powerful instruments.
• Low inter-modulation distortion for clear audio.
• Innovative merge function for stereo-to-mono summing.
• 80Hz high-pass roll-off filter to reduce low-frequency rumble.
• Rugged alloy steel construction for durability.

నియంత్రణలు మరియు కనెక్టర్లు:

• INPUT (1/4" Jack): Connect your instrument or audio source here.
• THRU (1/4" Jack): Provides a direct, unprocessed signal to feed an instrument amplifier or monitor.
• -15dB PAD Switch: Attenuates the input signal by 15dB for high-output sources, preventing overload.
• 48V Phantom Check LED: Illuminates momentarily when 48V phantom power is detected.
• MERGE Button: Combines the LEFT and RIGHT 1/4" inputs into a mono signal, sent to the XLR output.
• BALANCED OUTPUT (XLR): Provides a balanced, low-impedance output signal to a mixing console or audio interface.
• 180° POLARITY FLIP Switch: Reverses the polarity of the XLR output signal, useful for phase correction.
• LOW-CUT (-6dB@80Hz) Switch: Activates an 80Hz high-pass filter to reduce unwanted low-frequency rumble or mud.
• గ్రౌండ్ లిఫ్ట్ స్విచ్: Disconnects the audio ground from the chassis ground to eliminate hum and buzz caused by ground loops.

4. సెటప్

Follow these steps to connect your Radial J48 MK2:

1. కనెక్ట్ పరికరం: Plug your instrument (e.g., guitar, bass, keyboard) into the ఇన్‌పుట్ 1/4" jack on the J48 MK2.
2. కనెక్ట్ చేయండి Ampలైఫైయర్ (ఐచ్ఛికం): If you wish to send your instrument's signal to an on-stage amplifier or monitor, connect a 1/4" cable from the త్రూ jack on the J48 MK2 to your ampలైఫైయర్ ఇన్‌పుట్.
3. Connect to Mixer/PA: Connect a balanced XLR cable from the సమతుల్య అవుట్‌పుట్ of the J48 MK2 to an XLR input on your mixing console or audio interface.
4. Activate Phantom Power: Ensure that the connected mixing console or audio interface provides 48V phantom power to the XLR input. The 48V Phantom Check LED on the J48 MK2 will briefly illuminate to confirm power reception. The J48 MK2 requires 48V phantom power for operation.

5. ఆపరేటింగ్ సూచనలు

Optimize your sound using the J48 MK2's controls:

• Using the -15dB PAD: If your instrument has a very high output (e.g., active pickups, high-output keyboards), engage the -15dB ప్యాడ్ switch. This reduces the input signal level, preventing distortion and ensuring a clean signal to the mixer.
• MERGE Function: For instruments with stereo outputs (e.g., some keyboards or media players) that you want to sum to a single mono XLR output, press the విలీనం చేయండి button. Connect the left output to the INPUT jack and the right output to the THRU jack. The J48 MK2 will then combine these into a mono signal at the XLR output.
• POLARITY FLIP (180°): In multi-microphone or multi-DI setups, phase cancellation can occur, leading to a thin or hollow sound. If you suspect phase issues, engage the 180° POLARITY FLIP switch to invert the phase of the XLR output. Listen for an improvement in low-end response or overall clarity.
• LOW-CUT Filter: To reduce unwanted low-frequency noise, stage rumble, or to clean up the low-end of an instrument's signal, engage the తక్కువ కట్ switch. This activates an 80Hz high-pass filter, removing frequencies below 80Hz.
• గ్రౌండ్ లిఫ్ట్: If you experience hum or buzz in your audio signal, it may be due to a ground loop. Engage the గ్రౌండ్ లిఫ్ట్ switch to disconnect the audio ground from the chassis ground. If the hum persists, try disengaging it, as sometimes lifting the ground can introduce noise in certain setups.

6. నిర్వహణ

The Radial J48 MK2 is built for durability and requires minimal maintenance.

• శుభ్రపరచడం: యూనిట్ వెలుపలి భాగాన్ని శుభ్రం చేయడానికి మృదువైన, పొడి వస్త్రాన్ని ఉపయోగించండి. రాపిడి క్లీనర్లు లేదా ద్రావకాలను నివారించండి.
• నిల్వ: Store the unit in a dry environment, away from extreme temperatures and direct sunlight.
• తనిఖీ: Periodically check cables and connectors for wear or damage.

There are no user-serviceable parts inside the J48 MK2. Any internal servicing should be performed by authorized Radial Engineering technicians.

7. ట్రబుల్షూటింగ్

If you encounter issues with your J48 MK2, refer to the following common problems and solutions:

• ధ్వని లేదు:
  • Ensure 48V phantom power is active on the mixer's XLR input. The 48V Phantom Check LED should briefly flash upon connection.
  • Check all cable connections (instrument to INPUT, J48 OUTPUT to mixer).
  • Verify the instrument is working and its volume is up.
  • Ensure the mixer channel is unmuted and its gain is appropriately set.
• హమ్ లేదా బజ్:
  • Engage or disengage the గ్రౌండ్ లిఫ్ట్ switch to break potential ground loops.
  • అన్ని పరికరాలు సరిగ్గా గ్రౌండ్ చేయబడిందని నిర్ధారించుకోండి.
  • లోపభూయిష్ట కేబుల్స్ కోసం తనిఖీ చేయండి.
• వక్రీకరించిన ధ్వని:
  • పాల్గొనండి -15dB ప్యాడ్ switch if your instrument has a high output level.
  • Reduce the input gain on your mixing console.
  • Check for damaged cables or faulty equipment.
• Thin or Hollow Sound:
  • If using multiple microphones or DIs, try engaging the 180° POLARITY FLIP switch to correct phase issues.

If problems persist, contact Radial Engineering support for further assistance.

8. స్పెసిఫికేషన్లు

9. వారంటీ మరియు మద్దతు

For warranty information, technical support, or service inquiries, please contact Radial Engineering directly through their official website or authorized distributors. Keep your purchase receipt as proof of purchase for warranty claims.