Features - Radial Engineering J+4 User Manual

FEATURES

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Input Panel
1. Stereo ¼" input jacks for -10dB
unbalanced sources like DJ mixers.
2. Level control sets the optimum
output level for the line driver.
3. Stereo 3.5mm input jack for -10dB
unbalanced sources like MP3 play-
ers and laptops.
4. Stereo RCA input jacks for -10dB
unbalanced sources like CD and
DVD players.
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5. LED power indicator illuminates
when the 15VDC power supply is
connected.
Output Panel
6. Left and right XLR jacks produce
a balanced +4dB line-level stereo
signal. AES standard pin-2 hot.
7. Power connection for the included
15VDC/400mA supply.
8. Rubber non-slip pad covers the
bottom and provides electrical and
mechanical isolation.
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Side Panel
9. Book-end outer shell protects the
jacks and controls from damage.
10. Recessed high-pass fi lter switch.
Reduces low frequencies below
100Hz.
11. Recessed ground lift switch
disconnects pin-1 at the XLR to
eliminate hum and buzz caused by
ground loops.
12. Rugged baked enamel fi nish for
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years of good looks.
Inside
13. All connectors are insulated
from chassis to reduce noise and
crosstalk.
14. Double sided military spec PCB
with full ground plane for low noise.
15. Two custom designed Radial iso-
lation transformers eliminates noise
caused by ground loops.
16. 14-gauge inner I-beam frame
protects the PCB from torque and
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prevents solder joint failure.
Radial Engineering Ltd. J+4 User Guide
™