Radial EngineeringJ33 Turntable Preamp Direct Box


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Radial J33

Fully outfitted for hi-fi archival and rugged enough for stage performances.

A combination RIAA phono-turntable preamp and direct box that allows long-play vinyl albums to be played directly through a professional microphone preamp or mixing console where the very highest quality is required. This audiophile interface is ideally suited for album archiving, pristine sampling, recording performances, and DJ mixing. It has RCA inputs; stereo RCA, 3.5mm, and 1/4" TRS -10dB line-level outputs; and balanced mic-level XLR outs. Employs an indestructible steel housing with internal I-beam construction, a protective zone around switches and jacks, and a full-bottom no-slip pad. May be powered with 48V phantom or DC supply. An auto sensor automatically selects whichever power supply is present.

J33 Features

  • RIAA phono-turntable preamp and direct box
  • RCA inputs
  • XLR, RCA, 3.5mm, and TRS line-level outs
  • Steel housing
  • Switch and jack protection
  • Audio circuit type: Active circuit
  • Frequency response: RIAA response curve for phonographic playback
  • Dynamic range: 91 dB
  • Noise floor: -82 dBu @ 0 dBu output
  • Maximum input: -30 dBu @ 1kHz
  • Nominal Input: -50 ~ -40 dBu @ 1kHz
  • Total harmonic distortion: 0.002% @ 1kHz (-33 dBu input level)
  • Inter-modulation distortion: 0.025% @ -45 dBu input
  • Input impedance: 47k Ohms, unbalanced
  • Output impedance: XLR out: 600 Ohms; ¼", 3.5mm, RCA outs: 470 Ohms
  • LED power LED:: Two indicators illuminate when power is applied
  • Low-Cut filter: -3dB @ 100Hz (rumble filter)
  • XLR configuration: AES standard (pin-2 hot)
  • 14 gauge steel chassis and outer shell, baked enamel finish
  • Size: 5" x 6.25" x 2" (127 x 159 x 51mm)
  • Weight: 2.80lbs (1.28 kg)
  • Power: +48V phantom or +15VDC/400mA external supply (included)
  • Warranty: Radial 3-year, transferable
Radial Engineering J33 Turntable Preamp Direct Box Reviews