The JDI Duplex™ takes the world’s finest passive direct box one step further, providing numerous connector types to easily interface with any sound source – including line-level devices – while maintaining the highest audio quality and transparency. Optimized to handle extreme transients without distortion, with a linear frequency response that extends from 20 Hz up to 40 kHz, the JDI Duplex comes equipped with 1/4" and RCA connectors for -10dB consumer electronics and XLR inputs for +4dB professional line sources.Like the Radial JDI, the Duplex employs two high-performance 'made in the USA' audio transformers and the same pristine audio signal path that has made the JDI the industry standard. It features exceptional signal handling with virtually zero phase shift or harmonic distortion, while remaining linear across the entire audio spectrum. When driven to extremes, the natural transformer saturation and resulting warm Bessel curve makes the Radial Duplex the perfect choice for smoothing out highly dynamic instruments such as digital pianos and electronic drums that can sound harsh when pushed. Transformer isolation provides the additional benefit of eliminating troublesome ground loops that can cause hum and buzz in the audio system or interfere with video displays.Radial's innovative 'book-end'™ design provides protective zones that shield connectors and switches from the abuses of professional touring . A welded I-beam inner frame is designed to eliminate outside stresses that could torque the PC board and cause premature solder point and trace failure. A 14-gauge steel shell couples with the mu-metal transformer shield to eliminate stray magnetic field interference from power transformers and a full-bottom no-slip pad provides plenty of stay-put and helps reduce electrical coupling from amplifier chassis hardware.Grab the JDI Duplex today for the exceptionally wide bandwidth, versatility, and rugged chassis that Radial Engineering is hailed for.FeaturesJensen transformer-equipped passive DIEliminates hum and buzz from ground loops1/4", 3.5mm, RCA, and XLR inputs to connect any sourceExceptional signal handling and noise rejectionSpecificationsCircuit type: Passive transformer isolatedTransformer: Jensen JT-DBE# of Channels: 2Frequency Response: 20 Hz to 20 kHz, ±0.2 dBDynamic range: 135 dBSignal to noise: 119 dBPhase Deviation: -1° @ 20 Hz; 0.5° @ 150 Hz; 600 Ω loadTotal Harmonic Distortion: 0.001% @ 20 kHz, +4 dBu; 600 Ω loadInput:4 x 1/4" jack (CH-1 & CH-2 In & Thru)4 x RCA(CH-1 & CH-2 In & Thru) (mono-merge function for L & R)1 x 3.5mm jack2 x XLRMERGE MIX function: Stereo to mono merge switch x 2Input impedance: 140 kΩ (pad off); 10 kΩ (pad on)Max. Input Level: +20 dB @ 1 kHzPAD: -15dB pad on inputHI-CUT filter: 10kHz low pass switchOutput: 2 x balanced XLR-MOutput Impedance: 600 ΩGround lift: LIFT switch - XLR outs pin-1Construction: 14 gauge steel chassis and outer shellConditions: For use in dry locations only, 5-40°CDimensions (H x W x D): 3.25" x 8.25" x 6.25"Weight: 2.2 lb (1 kg) Radial Engineering JDI Duplex Passive Premium Stereo Direct Box.