Radial Engineering J33 User Manual

J 3 3™ P H O N O P R E A M P A N D A C T I V E D I

Order No. R800 1300

R a d i a l S m a r t S h e e t

The Radial J33 is a combination RIAA turntable preamp and active direct box that allows
long-play vinyl albums (LP’s) to be played directly through a professional microphone
preamp in a mixing console. The J33 is ideally suited for archiving, sampling, scratch
performances and DJ mixing when the highest possible sound quality is required.

The Radial J33 is designed for magnetic cartridges and features a stereo pair of RCA inputs
and a choice of RCA, 3.5mm and ¼” TRS stereo line-level outputs (-10dB, hi-Z) as well as
balanced stereo XLR outputs (mic-level, 600Ω). This arrangement makes the J33 incredibly
fl exible. 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 combo.

The J33 may be powered with 48V phantom when used with mixing consoles, or with the
included power supply when phantom is not available. The J33 is housed in a heavy-duty
welded I-beam inner enclosure that makes it impossible to torque the PC board. The outer
shell features a book-end design that protects the connectors and switches. Lasts a lifetime
and sounds great.

Features

• RIAA EQ curve for proper playback response

• RCA, 3.5mm, TRS and XLR output options

• Rumble fi lter stops low-frequency feedback

• Powered by 48V phantom or external supply

Applications

• Designed for magnetic turntable cartridges

• Pro DJ touring and night clubs

• Archiving vinyl records

• Recording digital samples from vinyl

• Recording scratch performances

Cool stuff

• Eliminates need for DJ mixer

• RIAA preamp and active DI in one box

• Can be used as hi-fi turntable preamp

• Lets you connect your turntable to anything!

• Low-Z out will drive signals 300 feet!

• Ultra-tough construction, lasts a lifetime

THUMB SCREW provides turntable
ground connection to eliminate hum.

PHONO INPUTS equipped with
RIAA preamp connects to turntables.

RCA OUTPUTS -10dB line-level
hi-Z outs connect to hi-fi systems.

TRS and 3.5mm OUTPUTS line­level -10dB outputs connect to PA
systems and computer sound cards.

POWER LED’s light when phantom­power is present or when the PSU is
connected.

RUMBLE FILTER gently rolls off
bass to reduce rumble and resonate
feedback at high playback volume.

XLR OUTPUTS balanced 600Ω
active drivers can drive signals over
100 meters (328 feet).

BOOK-END DESIGN creates a
protective zone around the switches
& connectors.

FULL BOTTOM PAD improves
electrical isolation and keeps the J33
from moving around on busy stages!

Mixing Console

Sound Card

CD-R Recorder

* Dashed line represents

turntable ground wire.

R a d i a l E n g i n e e r i n g L t d . · T el: 604-942-1001 · Fax: [phone] · www. r ad i a l e n g . c o m · e m a i l i n f o @ r a d i a l e n g . c o m

R a d i a l S m a r t S h e e t © 2 0 0 6 S u b j e c t t o c h a n g e w i t h o u t n o t i c e .

PSU CONNECTION 15VDC supply
connects here when phantom-power
is not available.

RUGGED glass-fi lled nylon con­nectors are 100% isolated for
true dual-channel operation.

HEAVY-DUTY WELDED I-BEAM
enclosure of 14 gauge steel makes
it impossible to torque the PC board.
Eliminates cold solder joints.

HIGH CYCLE heavy-duty switch
rated for 20,000 operations.

MILITARY-GRADE PC board
employs full ground plane to
reduce RF interference and noise.