Radial Engineering J+4 User Manual

FEATURES
Input Panel
1
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.
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.
6
Side Panel
9. Book-end outer shell protects the
jacks and controls from damage.
10. Recessed high-pass filter
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 9 10
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-guage inner I-beam frame
protects the PCB from torque and
13 14
prevents solder joint failure.
Radial Engineering Ltd.
2 3 4
J+4 SPECIFICATIONS
Frequency response:
Signal to noise:
Input level:
Maximum input level:
Maximum output level:
Dynamic range:
Total harmonic distortion + noise:
5
Channel separation:
Self noise:
Input impedance:
Output impedance:
High pass fi lter (low cut):
XLR confi guration:
Power supply:
Power Requirement:
Construction:
Size:
Weight:
7 8
RADIAL ENGINEERING 3 YEAR TRANSFERABLE LIMITED WARRANTY
RADIAL ENGINEERING LTD. ("Radial") warrants this product to be free from defects in mate-
rial and workmanship and will remedy any such defects free of charge according to the terms
of this warranty. Radial will repair or replace (at its option) any defective component(s) of this
product (excluding fi nish and wear and tear on components under normal use) for a period of
three (3) years from the original date of purchase. In the event that a particular product is no
longer available, Radial reserves the right to replace the product with a similar product of equal
or greater value. To make a request or claim under this limited warranty, the product must be
returned prepaid in the original shipping container (or equivalent) to Radial or to an authorized
11 12
Radial repair center and you must assume the risk of loss or damage. A copy of the original
invoice showing date of purchase and the dealer name must accompany any request for work
to be performed under this limited transferable warranty. This limited warranty shall not apply if
the product has been damaged due to abuse, misuse, misapplication, accident or as a result of
service or modifi cation by any other than an authorized Radial repair center.
THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF
AND DESCRIBED ABOVE. NO WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUD-
ING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY
PERIOD DESCRIBED ABOVE OF THREE YEARS. RADIAL SHALL NOT BE RESPONSIBLE
OR LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSS
ARISING FROM THE USE OF THIS PRODUCT. THIS WARRANTY GIVES YOU SPECIFIC
LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS, WHICH MAY VARY DEPENDING
ON WHERE YOU LIVE AND WHERE THE PRODUCT WAS PURCHASED.
15 16
™
J+4 Users Guide Radial Engineering Ltd.
True to the Music
®
10Hz ~ 20kHz +/- 1dB (-3dB at 40kHz)
>100dB
-10dBu typical
+17dBu
+15dBu
100dBu
0.004% @ 1k with -10dBu input (+4dBu output)
>90dB
-95dBu
10k-Ohms
600-Ohms typical
-3dB at 100Hz
AES standard pin-1 ground, pin-2 hot, pin-3 cold
15VDC 400mA center pin positive
- 30mA draw
14 gauge chassis, outer shell, baked enamel fi nish
3.3" x 5.0" x 2" (84 x 127 x 48mm)
1.55 lb (720g)
™
J+4 Users Guide
®
True to the Music
™
J+4
User Guide
Order No. R800 8015
Stereo -10dB Unbalanced to +4dB
Balanced Converter and Line Driver
Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5
Tel: 604-942-1001 Fax: 604-942-1010
email: info@radialeng.com
Radial J+4 user guide V1.0 - Part #: R870 1235 00
Subject to change without notice, copyright © 2009, all rights reserved