J+4 Specifications

The Radial J+4 is a stereo preamplifier designed to boost unbalanced instruments and consumer level signals and bring them up to a professional +4dB balanced line level. Careful attention has been paid to delivering quality audio while incorporating transformer isolation for added noise suppression. The J+4 delivers a performance that is as good or better than devices costing many times more.

Specifications

Block Diagram

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Specifications
Audio circuit type:	Active -10dB ~ +4dB line converter, transformer isolated
Number of channels:	2
Frequency response:	20Hz ~ 20KHz (± 2dB)
Dynamic range:	102dB
Total harmonic distortion:	0.004% @ 1kHz, +10dBu output
Phase Deviation:	0.5° @ 100Hz; 4° @ 20Hz
Input Impedance:	10k Ohms, unbalanced
Output Impedance:	1.6k Ohms, balanced
Maximum Input:	+17dBu @ 1kHz, 1% THD+N
Maximum Output:	+15dBu @ 1kHz, 1% THD+N
Features
Ground lift, HPF, Level Control
Input Connectors:	1/4", RCA, 3.5mm
Output Connectors:	XLR
General
Construction:	14-gauge steel
Size (L x W x D):	84 x 127 x 48mm (3.3" x 5.0" x 2")
Weight:	0.70 kg (1.55 lbs)
Shipping size (L x W x D):	102 x 76 x 165mm (4" x 3" x 6.5")
Shipping weight:	.87 kg (1.92 lbs)
Power:	+15VDC/400mA adapter Included
Conditions:	For use in dry locations only between 5°C and 40°C
Warranty:	Radial 3-year, transferable