Radial J48 MK2 48V Phantom Power Active Direct Box User Manual

1. Uvod

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. Varnostne informacije

Pred uporabo te naprave preberite in razumite vsa varnostna navodila.

• Predlog 65 Opozorilo: Ta izdelek lahko vsebuje kemikalije, za katere država Kalifornija ve, da povzročajo raka in prirojene okvare ali drugo reproduktivno škodo.
• Enote ne izpostavljajte dežju ali vlagi.
• Do not open the chassis; there are no user-serviceable parts inside. Refer all servicing to qualified personnel.
• Med delovanjem zagotovite ustrezno prezračevanje okoli enote.
• Use only with 48V phantom power sources as intended.

3. Izdelek je končanview

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.

Ključne značilnosti:

• 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.

Kontrole in priključki:

• 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.
• Stikalo GROUND LIFT: Disconnects the audio ground from the chassis ground to eliminate hum and buzz caused by ground loops.

4. Nastavitev

Follow these steps to connect your Radial J48 MK2:

1. Povežite instrument: Plug your instrument (e.g., guitar, bass, keyboard) into the VNOS 1/4" jack on the J48 MK2.
2. Poveži se z Amplifier (izbirno): If you wish to send your instrument's signal to an on-stage amplifier or monitor, connect a 1/4" cable from the THRU jack on the J48 MK2 to your ampprispevek uporabnika za življenje.
3. Connect to Mixer/PA: Connect a balanced XLR cable from the Uravnotežen izid of the J48 MK2 to an XLR input on your mixing console or audio interface.
4. Aktivirajte fantomsko moč: 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. Navodila za uporabo

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 PAD 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 ZDRUŽI 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 NIZEK VREZ switch. This activates an 80Hz high-pass filter, removing frequencies below 80Hz.
• ZEMLJIŠČE: If you experience hum or buzz in your audio signal, it may be due to a ground loop. Engage the GROUND Dvigalo 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. Vzdrževanje

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

• Čiščenje: Za čiščenje zunanjosti enote uporabite mehko, suho krpo. Izogibajte se abrazivnim čistilom ali topilom.
• Shranjevanje: Store the unit in a dry environment, away from extreme temperatures and direct sunlight.
• Pregled: 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. Odpravljanje težav

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

• Ni zvoka:
  • 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.
• Brenčanje ali brenčanje:
  • Vklop ali izklop GROUND Dvigalo switch to break potential ground loops.
  • Zagotovite, da je vsa oprema pravilno ozemljena.
  • Preverite morebitne okvarjene kable.
• Popačen zvok:
  • Vključite -15dB PAD 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. Specifikacije

9. Garancija in podpora

For warranty information, technical support, or service inquiries, please contact Radial Engineering directly through their official webali pooblaščenih distributerjev. Račun shranite kot dokazilo o nakupu za uveljavljanje garancije.