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Radial Engineering J33 Turntable Preamp and Direct Box

(2 customer reviews)

$174.99

Estimated delivery on 3 August - 14 September, 2025
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Items Included

  • Radial Engineering J33 Turntable Preamp and Direct Box
  • External Power Supply
  • Limited 3-Year Manufacturer Warranty

 

The J33 from Radial is designed specifically for use with turntables and is a combination RIAA turntable preamp and active direct box. This allows vinyl albums (LP’s) to be connected directly to a microphone preamp in a mixing console. The unit is ideally suited for archiving, sampling, scratch performances and DJ mixing when the highest possible sound quality is required.

The J33 is designed for use with magnetic cartridges only (the box does not support active cartridges) and the choice of outputs makes the unit very flexible. It can feed a hi-Z input such as a DJ system, and a low-Z input such as a pro-mixing console at the same time. It can be used solely as an RIAA preamp with hi-fi equipment or as an RIAA preamp and direct box combination.

The J33 may be powered with 48V phantom when used with a mixing console, or with the included power supply when phantom is not available. Housed in a heavy-duty enclosure that makes it impossible to torque the PC board, the outer shell of the J33 features a book-end design that protects the connectors and switches.

Turntable preamp and direct box combination with RIAA EQ curve for proper playback response
Designed specifically for magnetic turntable cartridges
Multiple outputs for usage flexibility
Rumble filter stops low-frequency feedback
Applications include pro DJ touring and night clubs, archiving vinyl records, recording digital samples from vinyl and recording scratch performances
Full bottom pad improves electrical isolation and keeps the unit from moving around on busy stages
Eliminates need for DJ mixer
Can be used as hi-fi turntable preamp
Powered by 48V phantom or external supply
Input Connections
2 x RCA phono
Output Connectors
2 x XLR
1 x 1/4″ TRS phone
1 x 1/8″ TRS stereo mini phone
2 x RCA phono
Input Level
50mV @ 1kHz
Output Level
-10dB consumer line level
-60dB 600 Ω microphone level
Controls
1 x Rotary control – Rumble Filter
Frequency Response
20Hz to 20kHz
Noise
Not specified by manufacturer
Power
15VDC or 48V phantom power (auto switching)
Dimensions
3 1/4″ x 5″ x 2″
Weight
1.95 lbs
Specialties
High pass filter, 200Hz cut off, -3dB at 100Hz
Packaging Info
Package Weight
2.1 lb
Box Dimensions (LxWxH)
11.8 x 4.85 x 2.8″

Based on 2 reviews

5.0 overall
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  1. Marcus

    I have purchased several turntable pre-amps, and they lasted a short while. This one is substantial and audio reference. I expect it to last a long, long time. Excellent sound reproduction.

    Marcus

  2. Robert

    After many hours of reading reviews of Turntable preamps, I decided on the J33 for several reasons. 1) Radial has an outstanding reputation with live sound and recording engineers. 2) One of the only units with XLR (Balanced) outputs. I’m using this with a Linn Sondek LP12 Turntable. Connected the L/R RCA outputs of the J33 into a Harmon Kardon amplifier for listening through Klipsch Forte speakers. The L/R XLR outputs into Presonus AI24 Mixer. The Presonus is connected to a Mac running Pro Tools. Main purpose of this is to allow conversion of vinyl (not available commercially in digital format) to digital format with Pro Tools in my recording studio. The meters in Pro Tools show almost -inf noise floor with the J33. That is very impressive. There literally is no audible hum from the J33 or the Linn. The J33 is also built like a tank. Very happy with my choice and would highly recommend this device for anyone wanting to add a preamp to their turntable.

    Robert