Radial EngineeringJ48 MK2 48V Active Direct Box
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Radial J48 Mk2
The Radial J48 is a great-sounding active direct box that has 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 intermodulation distortion and significantly improved dynamics over other DIs.
Features include a -15dB pad, 180 degree polarity reverse, a unique merge function to mix 2 signals to mono, an 80Hz high-pass rumble filter, and ground lift. Like all Radial products, the J48 is built to handle abuse on the road and features a unique welded I-beam construction for years of trouble-free performance.
J48 Features
- Active 48-Volt phantom powered direct box
- -15dB pad
- 180 degree polarity reverse
- Merge function to mix 2 signals to mono
- 80Hz high-pass rumble filter
- Ground lift
- Welded I-beam construction
- Minimal power draw with high rail voltage
- Will not choke when driven hard
- Low intermodulation distortion
- Audio circuit type:Â Proprietary analog circuit with low-noise op-amp
- Frequency response: 20Hz ~ 20kHz (± 1.5dB)
- Dynamic range:Â 109dB
- Noise floor:Â -99dB below 0dBu
- Equivalent input noise:Â -103dBu
- Maximum input:Â +10dBu
- Phase deviation: +10º at 20Hz | 0º at 1kHz | -1º at 20kHz
- Total harmonic distortion:Â 0.002% @ -5dBu
- Inter-modulation distortion:Â 0.003% @ -3dBu
- Input impedance: 220kΩ - ¼" input
- Output impedance: 600Ω - XLR output
- Merge function:Â IN and THRU jacks are summed to mono
- Input pad:Â Â -15dB
- Polarity: 180º signal polarity reverse switch
- Low-cut filter:Â -3 dB @ 80Hz
- Ground lift:Â Disconnects pin-1 at XLR output
- XLR configuration:Â AES standard (pin-2 hot)
- Power:Â 48V phantom - proprietary digital switching
- Construction:Â 14 gauge steel chassis and outer shell, baked enamel finish
- Size:Â 3.3" x 5.0" x 2" (84 x 127 x 48mm)
- Weight:Â 1.55 lb (720 g)
- FCC approval:Â Complies with section 15 of the FCC Rules
- Warranty:Â Radial 3-year, transferable
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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