Heritage Audio LANG Electronics SILVERR 47® – All Tube Dual Mic Preamp
OVERVIEW
The Heritage Audio LANG SILVERR 47® is a premium dual-channel tube mic preamp built to resurrect one of the most influential preamp circuits of the 1960s. Inspired by the storied British-Invasion sound, each channel incorporates a NOS 6AU6 pentode input stage and a JJ E88CC output stage. Custom LANG input/output transformers give it that vintage texture, while stepped gain control in 6-dB increments (up to +52 dB) and a variable output control provide precision and flexibility.
One of the standout features is the No-Feedback (NFB) gain position – a design twist introduced by Heritage that allows for significantly enhanced harmonic distortion and saturation, pushing the unit beyond simple vintage emulation into creative territory. With front-panel mic (balanced XLR), line (TRS), and DI inputs, this preamp is not only a mic preserver but a versatile tone-shaping tool. Whether you’re after classic clean vocals, gritty guitar direct-ins, or aggressive saturation, the SILVERR 47 has the sonic character and flexibility to fit in.
KEY HIGHLIGHTS
British-Invasion Sonic Signature:
Recreates the vintage preamps that defined the sound of 1960s Britain, with tube stages and transformers that capture their warmth, detail, and punch.
No-Feedback Gain Mode for Extreme Harmonics:
Switching into No Feedback mode increases distortion dramatically, allowing for bold coloration that adds grit and presence when required.
Stepped Gain Control (6 dB steps up to +52 dB):
Front-panel increments give you repeatable settings and precise gain staging, from subtle clean boost to full saturation.
Versatile I/O: Mic, Line & DI:
Balanced XLR mic inputs, TRS line inputs, and front-panel TS DI allow this preamp to excel in many roles – mic pre, instrument DI, EQ driver, or line stage.
Premium Tubes & Transformers:
NOS 6AU6 pentode input tubes and JJ E88CC outputs paired with custom LANG transformers ensure that every channel behaves richly and dynamically.
FEATURES
- Two channels of full-tube preamp architecture
- NOS 6AU6 pentode input tubes, JJ E88CC output tubes per channel
- Custom LANG input and output transformers by Heritage Audio
- “No Feedback” gain position for enhanced harmonic distortion
- Stepped gain control in 6 dB increments, up to +52 dB total gain
- Variable output control (per channel) for precise level matching
- Multiple input options: balanced XLR mic, 1/4″ TRS line, front-panel 1/4″ TS DI
- 80 Hz high-pass filter (switchable) per channel
- 20 dB pad (mic pad) option
- Phantom power: +48 V per channel
- Phase reverse/polarity switch per channel
TECHNICAL SPECS
Channels: 2 (dual/split mono or stereo use)
Tubes per Channel: NOS 6AU6 pentode (input), JJ E88CC (output)
Maximum Gain: +52 dB, stepped in 6 dB increments (lowest position ~ +22 dB)
Inputs:
- Mic (balanced XLR)
- Line (¼″ TRS)
- DI (¼″ TS front panel)
Output Connectors: Balanced XLR and TRS per channel
Microphone Input Impedance: ~1,500 Ω (transformer-balanced)
Line Input Impedance: ~10 kΩ bridged, transformer balanced
DI (Front) Input Impedance: > 2 MΩ (unbalanced)
Output Impedance: < 200 Ω, to drive loads down to 600 Ω
Maximum Output Level: > +24 dBu into 600 Ω
Frequency Response: -0.5 dB from 20 Hz to 20 kHz
THD: < 0.2% at +20 dBu; around 1% in No Feedback mode
Mic Pad: 20 dB switchable
High-Pass Filter: 80 Hz per channel
Phantom Power: +48 V per channel
Power Supply: Internal worldwide power supply (110-230 V switchable)
Chassis/Format: 2U rack unit, approx. 19″ × 2U, depth ~211 mm
Weight: 5.66 kg (approx.)