HDI
High Definition Studio DI
The HDI is Radial Engineering’s flagship direct box, designed to create exceptional sonic results with any instrument in both studio recording and professional touring applications. The HDI combines the best aspects of both active and passive direct boxes, utilizing premium Jensen transformers and a unique Color control circuit that can blend between an ultra-clean tone on one hand, and the warmth and grit of transformer saturation and harmonic distortion on the other. A simple but elegant feature set allows the engineer or musician to achieve their desired tone in seconds, with variable Level, Color, and Presence controls on oversized chrome-plated knobs. A smooth Opto compressor can be engaged for subtle peak reduction, and a HPF is included to remove excessive low end when pushing the unit hard into distortion. Both mic and line-level balanced outputs are provided, allowing you to connect directly to a recording interface without the need for an additional preamplifier. Finally, a responsive output meter for visual feedback.
Technical Specifications:
Frequency Response - Line Output: 1Hz ~ 100kHz +0.25/-3dB, 20Hz ~ 20kHz +/-0.1dB
Frequency Response - Mic Output: 10Hz ~ 80kHz +0.25dB/-3dB
Dynamic Range: 112dB (20-20k, unweighted, referred to +25dBu)
S/N Ratio: 91dB (20-20k, unweighted, referred to +4dBu)
THD+N: 0.3% @20Hz, 0.22% @100Hz, 0.01% @1kHz (+4dBu In)
Minimum Gain - Level CCW: -3dB
Maximum Gain - Level CW: +31dB
Max Input 1/4” TS: +5dBu, 3 VAC RMS, 8.4 V Peak to Peak
Max Input 3.5mm: +25dBu, 7 VAC RMS, 20V Peak to Peak (Level @ 12:00)
Max Output Line-Level XLR: +25dBu (1% THD at 1kHz)
Max Output Mic-Level XLR: +3.7dBu (1% THD at 1kHz)
Max Output 1/4” Processed Out: +8dBu (Approx. unity gain with Level @ 12:00)
Control & Connection Features:
Level, Color, Presence, Ground Lift, -15dB Pad, Output Meter
Input Connectors: 1/4” TS (front and rear), 3.5mm Synth
Output Connectors: XLR Line / Mic, 1/4” TS Processed, 1/4” TS Thru
Hi-Z: 200k Ω / 2Meg Ω @ 1/4” Inputs
Opto: 6:1 ratio, max 8dB gain reduction
High-Pass Filter: 40Hz / 100Hz rolloff @ -6dB/octave
General Specifications:
Construction: 14 gauge steel chassis, 1/2” aluminum front panel
Size (L x W x H): 8.25” x 8.25” x 3.5”
Weight: 5.05lbs
Conditions: For use in dry locations only between 5°C and 40°C
Power: 100-200VAC 0.45A ~ 50/60Hz
Conformity: CE
Warranty: Radial 3-year, transferable
*Subject to change without notice
