Heritage Audio LANG Silverr 47 Tube Microphone Preamp
Dual-Channel Vintage-Style Tube Preamplifier
The Heritage Audio LANG Silverr 47 is a 2U dual-channel, all-tube microphone preamp inspired by classic 1960s British console line amplifiers. It pairs NOS 6AU6 pentode input stage tubes with JJ E88CC output tubes and custom LANG Electronics transformers, delivering classic tube warmth, high-fidelity detail, or heavy analog harmonic saturation.
Key Features
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Dual-Channel All-Tube Signal Path: Each channel utilizes a matched tube pair consisting of an NOS 6AU6 pentode input valve and a JJ E88CC output valve.
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Custom Transformers: Features custom-designed LANG Electronics input and output transformers to deliver classic British transformer character.
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No Feedback (NFB) Mode: Switchable No Feedback gain setting bypasses negative feedback, significantly boosting harmonic distortion for drive and saturation.
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Precision Gain Staging: Equipped with 6 dB stepped voltage gain controls (+22 dB to +52 dB) and variable output attenuators for repeatable gain staging.
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Flexible I/O Connectivity: Offers balanced XLR microphone inputs, 1/4" TRS line inputs, front-panel 1/4" TS DI instrument inputs, and parallel XLR/TRS outputs.
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Channel Controls: Includes a -20 dB Pad, +48V Phantom Power, Phase Reverse, and an 80 Hz High-Pass Filter per channel.
Technical Specifications
| Parameter |
Specification |
| Preamp Type |
Tube (Dual-Channel) |
| Form Factor |
2U Rackmount (19-inch) |
| Tubes Per Channel |
1 x NOS 6AU6 (Input Stage), 1 x JJ E88CC (Output Stage) |
| Transformers |
Custom LANG Electronics Input & Output Transformers |
| Gain Range |
+22 dB to +52 dB (6 dB stepped increments) |
| THD |
<0.2% (Normal Mode), up to ~1% (NFB Mode) |
| Frequency Response |
20 Hz – 20 kHz (±0.5 dB) |
| Microphone Input Impedance |
~1.5 kΩ (Balanced XLR) |
| Line Input Impedance |
~10 kΩ (1/4" TRS) |
| DI Input Impedance |
>2 kΩ (Unbalanced 1/4" TS) |
| Output Impedance |
<200 Ω (Transformer Balanced) |
| Analog Inputs |
2 x XLR (Mic), 2 x 1/4" TRS (Line), 2 x 1/4" TS (Front DI) |
| Analog Outputs |
2 x XLR, 2 x 1/4" TRS |
| Power Supply |
Internal Worldwide Power Supply |
| Dimensions (H x W x D) |
3.5″ x 19″ x 8.3″ (88 mm x 481 mm x 211 mm) |
| Weight |
12.3 lbs. (5.6 kg) |
