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
Graphs
| 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 | |
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