Radial Engineering > Radial Engineering J33 Turntable DI

Radial Engineering J33 Turntable DI

A high quality RIAA turntable preamp combined with a direct box that enables long-play records to connect directly to mic-preamps and professional mixing consoles, thus bypassing the usual DJ mixer. The J33 will be of particular interest to recording engineers that re-sample record tracks, for musical archiving to transfer long-play albums to CDs and of course for professional DJs and scratching.

Radial J33 Turntable DI

  • Stereo RCA inputs
  • Stereo RCA, ¼" TRS and 3.5mm outputs
  • Balanced mic level XLR outputs
  • Low frequency rumble filter
  • Choice of 48V phantom or DC supply
 
The Radial J33 is a high quality combination turntable (phono) preamp and direct box that offers a choice of balanced mic-level and -10dB consumer line-level outputs. This allows a 33-RPM record player to be connected directly to a professional mixing console or mic preamplifier. This makes the Radial J33 ideal for use in studio for re-recording, sampling and archiving, while offering DJs an improved interface for recording scratch and remix performances over typical DJ mixers or other stand-alone turntable preamps. For maximum flexibility, the Radial J33 is equipped with a rumble filter to eliminate low-frequency resonance and may be powered with remote 48Volt phantom or local external DC supply.
 

Using the Radial J33

J33 powered by 48V phantom:
J33 powered by 48V phantom

With its straightforward design, the Radial J33 is very easy to use. It can be powered using 48V phantom or by the external power supply.
 

Using the J33 with a professional mixing console or preamp

  1. Make sure all levels are set to zero.
  2. Connect the turntable to the J33 and make sure you connect the ground wire.
  3. Connect the output of the J33 to your mixer using the XLR connectors.
  4. Turn on the 48V phantom power on the console.
  5. The J33 LED indicators will tell you if power is present.
  6. Raise the volume and you are ready to go!
  7. If you encounter noise, try the ground toggle as this can sometimes help.
 
J33 powered by the included external power supply:
J33 powered by the included external power supply
 

Using the J33 with a consumer preamp or unbalanced device

  1. Make sure all levels are set to zero.
  2. Connect the turntable to the J33 and make sure you connect the ground wire.
  3. Connect the output of the J33 to your hi impedance, line-level or auxiliary input.
  4. Connect the 15V power supply.
  5. The J33 LED indicators will tell you if power is present.
  6. Raise the volume and you are ready to go!
  7. If you encounter noise, try the ground toggle as this can sometimes help.
 
Note that the Radial J33 will automatically sense the power from either the 48V phantom or the external power supply. Only use the supply that is provided with your J33 as it requires a special 15V input. If both the phantom power and the supply is connected, the J33 will draw its power from the external power supply.
 
Important Note: When switching from 48V phantom power to the external DC supply, please wait 15 seconds to allow the RIAA amplifier to charge and stabilize.
 

Specifications

  • Frequency response:  20Hz to 20kHz
  • Total harmonic distortion:  0.05% @ 1kHz
  • Phase distortion:  0.1o @ 1kHz
  • Intermodulation distortion:  > 1%  
  • RIAA dynamic phono input:  -25dB RIAA dynamic phono input
  • Max phono input level:  50mV @ 1kHz
  • High pass filter:  200Hz cut off, -3dB at 100Hz
  • Unbalanced outputs:  10kOhm, -10dB line-level
  • Balanced outputs:  600 Ohm, -60dB mic-level
  • Output levels:  -10dB consumer line-level; -60dB 600 ohm mic-level
  • RIAA curve:  (reference dB @ 1kHz)  +19.5dB @ 20Hz; -19.65dB @20kHz  
  • RIAA deviation:  +/-0.5dB maximum
  • Size (H x W x D):  2” x 3.25” x 5” (45mm x 83mm x 126mm)
  • Power (auto-switching):  15VDC or 48V phantom power
  • Weight (w/supply and packaging):  1.95lbs (0.9kg)
  • Construction:  14-gauge steel chassis & shell, baked enamel finish
  • Warranty:  Radial 3 year limited warranty

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