Solid State Logic X-Rack VHD Input Module Mic Preamp
Brand
SOLID STATE LOGIC
The SSL X-Rack VHD Input Module is a high-end analog mic preamp designed for professional recording and sound shaping within the SSL X-Rack modular system. It features SSL’s Variable Harmonic Drive (VHD) circuit, allowing you to add controlled second or third harmonic saturation from ultra-clean studio-grade clarity to warm analog distortion and aggressive character tones. Equipped with a high-bandwidth mic/line input, Hi-Z support, pad control, and high/low-pass filters, it delivers exceptional flexibility for tracking vocals, instruments, and line sources. A built-in “Listen Mic Compressor” adds classic SSL studio compression character, making it a powerful creative tool for engineers who want precision, warmth, and tonal versatility in a single module.
Solid State Logic X-Rack VHD Input Module – Professional Mic Preamp System
The Solid State Logic X-Rack VHD Input Module is a high-end modular microphone preamplifier designed for professional recording studios. Part of SSL’s X-Rack system, it combines ultra-clean analogue preamplification with optional harmonic saturation and classic SSL dynamics processing.
Ultra-High Quality SSL Mic Preamp
At its core, the module provides a wide-bandwidth, electronically balanced microphone preamplifier with up to +70 dB of gain. It is designed to deliver the clean, transparent sound SSL is known for, making it suitable for critical recording applications such as vocals, drums, and acoustic instruments.
Variable Harmonic Drive (VHD) Circuit
The defining feature of this module is SSL’s Variable Harmonic Drive (VHD) system. This allows engineers to introduce controlled harmonic distortion into the signal path, blending 2nd-order (warm, tube-like) or 3rd-order (edgy, transistor-like) harmonics depending on the gain structure.
At lower settings, VHD adds subtle warmth and character. At higher gain levels, it can produce aggressive saturation and distortion textures for creative sound shaping.
Classic SSL Listen Mic Compressor
The module includes the famous SSL Listen Mic Compressor, originally designed for talkback microphone protection on the SL 4000E console. It features fixed attack and release characteristics, making it especially effective for crushing drum room microphones and creating aggressive ambient textures.
Filtering and Signal Control
Integrated high-pass and low-pass filters allow precise tonal shaping before further processing. A dedicated trim control after the VHD stage ensures accurate level matching within the recording chain.
Flexible Input Design
The module supports microphone, line, and high-impedance (Hi-Z) sources, with pad switching for handling high-level signals. This makes it a versatile front-end for a wide range of studio recording applications.
Key Features
- Modular SSL X-Rack microphone preamp system
- Ultra-wideband mic preamp with up to +70 dB gain
- Variable Harmonic Drive (VHD) for controllable saturation
- Blend of 2nd and 3rd harmonic distortion characteristics
- Classic SSL Listen Mic Compressor (fixed attack/release)
- High-pass and low-pass filtering for tone shaping
- Hi-Z and pad input options for flexible connectivity
- Dedicated trim control after VHD stage
Ideal for Professional Recording Studios
The SSL X-Rack VHD Input Module is designed for engineers and producers who need both ultra-clean recording capability and creative analog coloration. It is widely used in professional studios for vocals, drums, and experimental sound design where both precision and character are required.
| Brands | SOLID STATE LOGIC |
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