Solid State Logic Alpha VHD-Pre Rackmount 4-Channel Microphone Preamplifier
Features
- Mic, Instrument & Line Inputs
- Up to 75 dB of Gain
- Output Gain Control
- Per-Channel Variable Harmonic Drive
- 4 x XLR 3-Pin Mic/Line Inputs
Description
The Solid State Logic Alpha VHD-Pre Rackmount 4-Channel Microphone Preamplifier is a patented SSL preamp design that can deliver ultra-clean SSL grade recordings but also features a patented 'Variable Harmonic Drive' circuit which can be switched into the signal path. The Variable Harmonic Drive circuit uses a 100% analogue signal path to generate rich harmonic distortion. As you increase the input gain, the Variable Harmonic Drive circuit introduces either 2nd or 3rd harmonic distortion or a blend of the two to your source material. At lower gain settings it adds gentle valve-style warmth or a touch of transistor edge. As the gain is increased the more extreme the distortion becomes until at high gain settings it delivers fierce trashy transistoresque grunge. VHD pre's give the user ultimate versatility from a studio grade preamp. Whether it's ultra-clean traditional SSL, subtle warming or totally trashy transistor distortion. VHD delivers a uniquely versatile pallette of rich analogue character that can be applied as a mic pre, instrument DI or line level processing device.
Key Features:
- Transparent SSL preamps with 75 dB of gain
- -20 dB pad switches that illuminate to indicate overload
- Four independent VHD (Variable Harmonic Drive) systems, first featured on SSL's flagship Duality console
- Individual input, output, and VHD controls for each section
- The Variable Harmonic Drive circuit uses a 100% analog signal path to generate rich harmonic distortion; as you increase the input gain, the Variable Harmonic Drive circuit introduces either 2nd or 3rd harmonic distortion or a blend of the two
- Selectable 48V phantom power per channel
- Hi-Z switches to accommodate mic-, line-, and instrument-level signals
- Front-panel 1/4" instrument/line inputs with passive DI-type impedance detection and level matching
- Rear-panel XLR mic/line inputs and XLR outputs
- Occupies 1 RU of rack space
Specifications
| Number of Channels | 4 |
| Inputs | 4 x XLR 3-pin female (balanced) 4 x 1/4" TS Hi-Z (unbalanced) |
| Outputs | 4 x XLR 3-pin male (balanced) |
| Phantom Power | 48 VDC |
| Gain Range | Input: +20 to +75 dB Output: ±20 dB |
| Specialities | VHD (Variable Harmonic Drive) circuit per channel -20 dB pad per channel |
| Maximum Input Level | 0 dBu (+20 dBu with pad) |
| Maximum Output Level | +24 dBu |
| Input Impedance | XLR Lo-Z: 1 kOhm XLR Hi-Z: 10 kOhms 1/4" Hi-Z: 1 MOhm |
| Output Impedance | 40 Ohms |
| Frequency Response | Not specified by manufacturer |
| Noise | Not specified by manufacturer |
| Operating Temperature | 41 to 86°F / 5 to 30°C |
| Non-Operating Temperature | -4 to 122°F / -20 to 50°C |
| Temperature Gradient (max) | 59°F / 15°C per hour |
| Operating Humidity | 20 to 80% |
| Non-Operating Humidity | 5 to 90% |
| Max Wet Bulb | 84°F / 29°C non-condensing |
| Operating Vibration | < 0.2 G (3 to 100 Hz) |
| Non-Operating Vibration | < 0.4 G (3 to 100 Hz), power off |
| Operating Shock | < 2 G (10 ms maximum) |
| Non-Operating Shock | < 10 G (10 ms maximum) |
| Operating Altitude | 0 to 9842.5' / 0 to 3000 m |
| Non-Operating Altitude | 0 to 39,370.1' / 0 to 12,000 m |
| Power Consumption | < 20 W |
| Power Requirement | At VHD-Pre: +5 VDC (± 15 VDC) via 5-pin 180° DIN connector At Power Adapter: 100 to 240 VAC, 50 to 60 Hz via IEC320 3-pin connector |
| Dimensions | 19.0 x 9.1 x 1.8" / 48.2 x 23.0 x 4.5 cm (including rack ears, casing only) 17.2 x 9.1 x 1.8" / 43.8 x 23.0 x 4.5 cm (excluding rack ears, casing only) |
| Weight | 6 lb / 2.6 kg |
In The Box
- Solid State Logic Alpha VHD-Pre Rackmount 4-Channel Microphone Preamplifier
- External Mains Adapter
- Power Cable
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Details
- Product: Solid State Logic Alpha VHD-Pre Rackmount 4-Channel Microphone Preamplifier
- Manufacturer: Solid State Logic
- Model: SS-ALPHA-VHD
- SKU: SS-ALPHA-VHD
- RM Product #: 93504
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