True to the Music
3
Radial Engineering
J33 User Guide
FEATURE SET
The J33 features a pair of stereo inputs for the turntable. A
ground lug is provided to properly ground the turntable to avoid
system noise. This signal then feeds the RIAA preamp that
boosts the phono signal while introducing the RIAA equalization
curve.
Next to the turntable inputs are a series of unbalanced -10dB
consumer line-level outputs. These include a stereo set of RCA
connectors that can connect to the auxiliary or CD inputs on a
typical hi-fi receiver; a 1/8” (3.5mm) stereo mini-jack that can
connect to an MP3 player or computer sound card and a ¼” TRS
connector for a stereo feed that can be split using an insert cable
to a pair of line inputs on a PA or DJ mixer.
The J33 is also equipped with a low-frequency rumble filter. This
gently rolls off the bass at 200Hz and is -3dB at 100Hz to reduce
the low frequency rumble and feedback that can often occur
when spinning records in high volume environments such as on
stage or in nightclubs.
To connect to professional balanced systems, the Radial J33 is
equipped with a pair of male XLR connectors. The active bal-
anced drivers, shown in the block diagram, convert the signal
to a low impedance (600ohm), microphone level, stereo signal.
The J33’s balanced XLR outputs can drive turntable signals well
over 100 meters (328 feet) without appreciable loss or noise.
This makes the J33 ideal for driving turntable signals through a
snake system on stage and through the patch bays and complex
wiring systems that abound in the professional studio.
The Radial J33 may be powered with 48V phantom or with the
included 15VDC power supply. The J33 will automatically select
the power source and the two LED on the front panel will illumi-
nate, indicating power is present.
RIAA RESPONSE CURVE
