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Radial R800 2025 HDI Active Studio Instrument Preamp

Radial R800 2025 HDI Active Studio Instrument Preamp

SoundPro Item: 46304 | Part Number: R800 2025

$849.99
$1,140.00 $849.99
Your Price Sold out
MSRP: $1,140.00 | MAP: $849.99

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  • Jensen Transformer Design Delivers Clear Instrument-To-Mic Conversion
  • Color Control Blends Clean Tone With Warm Harmonic Distortion
  • Optional Opto Compressor Provides Transparent Peak Reduction
  • Dual Mic And Line Level Outputs For Direct Interface Integration
  • High Pass Filter Removes Excessive Low End When Pushing Hard
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The Radial HDI is built for recording engineers and touring professionals who demand sonic flexibility without complexity. Whether tracking guitars, keyboards, or bass in the studio or running live sound on the road, the HDI combines active signal conditioning with premium Jensen transformers to deliver clean, articulate tone or warm, saturated character—all from a single compact unit.

The Color control circuit is the heart of the HDI: slide between ultra-clean impedance matching and transformer-driven harmonic saturation, giving you infinite tonal possibilities. Pair this with Level and Presence controls, an optional opto compressor for transparent peak control, and a high-pass filter to manage low-end buildup, and you have a complete tone-shaping solution that integrates seamlessly into any mixing workflow.

Dual balanced outputs—mic and line level—eliminate the need for additional gain staging or external preamps. A responsive output meter provides instant visual feedback, while external powering via included supply or 48V phantom power ensures reliability in any environment.

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Specifications

Audio
Frequency Response Line Output
1 Hz–100 kHz (+0.25/-3 dB), 20 Hz–20 kHz (±0.1 dB)
Frequency Response Mic Output
10 Hz–80 kHz (+0.25/-3 dB)
Dynamic Range
112 dB (20 Hz–20 kHz, unweighted, referred to +25 dBu)
Signal To Noise Ratio
91 dB (20 Hz–20 kHz, unweighted, referred to +4 dBu)
Total Harmonic Distortion
0.3% @ 20 Hz, 0.22% @ 100 Hz, 0.01% @ 1 kHz (+4 dBu input)
Performance
Minimum Gain
−3 dB (Level CCW)
Maximum Gain
+31 dB (Level CW)
Maximum Input 1/4"" TS
+5 dBu, 3 VAC RMS, 8.4 V peak-to-peak
Maximum Input 3.5mm
+25 dBu, 7 VAC RMS, 20 V peak-to-peak (Level @ 12:00)
Maximum Output Line Level XLR
+25 dBu (1% THD at 1 kHz)
Maximum Output Mic Level XLR
+3.7 dBu (1% THD at 1 kHz)
Maximum Output 1/4"" Processed
+8 dBu (approx. unity gain with Level @ 12:00)
Opto Compressor Ratio
6:1
Opto Compressor Max Gain Reduction
8 dB
High-Pass Filter
40 Hz / 100 Hz rolloff @ −6 dB/octave
Connectivity
Input Connectors
1/4"" TS (front and rear), 3.5mm synth
Output Connectors
XLR line/mic, 1/4" TS processed, 1/4"" TS thru
Controls
Ground Lift
Yes
Output Pad
Yes
Construction
Chassis Material
14-gauge steel
Front Panel Material
1/2" aluminum
Dimensions
Length
8.25"
Width
8.25"
Depth
3.5"
Weight
Unit Weight
5.05 lbs
Electrical
Power Input
100–200 VAC, 0.45 A, 50/60 Hz
Environmental
Operating Temperature
5°C to 40°C
Location
Dry locations only
Warranty
Coverage
3-year transferable

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