Radial Engineering J48 | Active DI Box for Acoustic Guitar and Bass

Radial J-48  (Radial Engineering J 48 v2)

Active DI for Acoustic Guitar and Bass, Extra Headroom and High-Pass Filter

Many typical active direct boxes can't handle the load of a battery-powered guitar or bass, which can get as hot as 7 volts. However, the Radial Engineering J48 is not only a great sounding active direct box, it's been optimized to produce maximum headroom while working within the limited current available from standard 48V phantom power. By employing a unique switching power supply, the J48 is capable of peak transients to 9 volts without choking. The result is lower harmonic distortion, half the inter-modulation distortion and significantly improved dynamics over other DIs.

Several switches are available to help clean your sound and make the direct box more versatile. A ground lift eliminates buzz from ground loops, while the low cut switch removes unwanted boomy bass response. A merge option allows you to transform your thruput into a second input for summing stereo signals, and the polarity switch helps for when there are phasing issues. Finally, the 15dB pad helps cool off signals that would otherwise be too hot to handle!

The compact J48 is built road-ready with 14 gauge steel in their unique book-end design that provides protective zones around the switches and connectors. The internal welded I-beam construction assures outside stress will not torque the PC board thus assuring longer product life.

Features
Exceptional headroom & dynamic range
Retains the natural sound of the source instrument
Merge switch sums stereo instruments to mono
Powered by 48V phantom power, no batteries required
15dB pad
Specifications
Audio Circuit Type: Proprietary analog circuit with low-noise op-amp
Frequency Response: 20 Hz to 20 kHz
Dynamic Range: 109 dB
Total Harmonic Distortion: 0.002% @ -5 dBu
Intermodulation Distortion: 0.003% @ -3 dBu
Phase Deviation: +10° at 20 Hz / 0° at 1 kHz / -1° at 20 kHz
Input Connectors: 1/4"
Input Impedance: 220 kΩ
Equivalent Input Noise (EIN): -103 dBu
Noise: -99 dB below 0 dBu
Max. Input Level: +10 dBu
Output Connectors: Balanced XLR, 1/4" Thru
Output Impedance: 200 Ω (XLR)
Features: Input Pad, Mono Sum, 180° Polarity Reverse, Ground Lift, HPF
Construction: 14-gauge steel chassis and outer shell
Dimensions (H x W x D): 2" x 3.3" x 5.0"
Weight: 1.55 lbs (720 g)