LOCi
Analog Legacy Phonograph Playback System
Professional Phonographic Preamplifier with RIAA + Archival Compensation & Corrective EQ
- True differentially balanced phonographic preamplifier topology
- User-definable (universal) compensation and loading parameters
- Sets new precedent in phonographic sonic invisibility
- Ultra-premium transformerless componentry throughout
- Gold relays, connectors & switches. Hand machined aluminum cosmetics
- Extremely low noise (-125 dBu flat). Pure class-a discrete j-FET filters
- Effortless, lifelike musical performance at all dynamic levels
- Constructed for life, cosmetically appealing
- Lundahl MC transformer option included at no additional charge
Specifications
PHONOGRAPHIC PREAMPLIFIER & GENERAL:
- Input Amplifier Signal Path: Discrete NPN Transistor-Hybrid (HV-3 PAM-01)
- EQ Amplifier Signal Path: All Discrete 100V J-FET Servo (MM-120)
- Frequency Response, +/- 0.5 dB: 10 Hz to 100 kHz, comps & filters out, + 45 dB gain
- Common Mode Rejection Ratio: -75 dBu typical, 10 Hz - 50 kHz, 1.0V P/P CM
- Maximum Input / Maximum Output: +23 dBu flat / + 26 dBu RIAA in
- Maximum System Gain: 60 dB Nominal. Higher upon request.
- Phono Input Impedance: User selectable. Factory Stock: 47.5k ohms & 270 pF
- Output Impedance: 49.9 ohms
- Broadband Noise (no weighting filters): Better than -125 dBu EIN, flat. -98 dBu EIN, RIAA in
- Three-pin XLR Polarity: Pin 2 = positive polarity, Pin 1 = ground
PHONOGRAPHIC COMPENSATION & CORRECTIVE FILTERS:
- Maximum Filter Boost & Cut: +/- 10 dB (21 step detented)
- Notch Filter "Q" (Quality Factor): Q = 1.0
- Low Frequency Compensation (Hz): 200, 250, 300, 400, 500/RIAA, 700/USER
- High Frequency Compensation (dB @ 10 kHz): -5.0, -7.0, -9.5, -11.5, -13.7/RIAA, -16.0/USER
- Low Filter Fixed Frequencies (Hz): 20, 35, 60, 100, 180, 260
- High Filter Fixed Frequencies (kHz): 1.0, 2.0, 3.0, 5.0, 8.0, 12.0
- Peak/Shelf Selection on all Filters?: Yes (4)
- Bypass Selection on all Bands?: Yes (8), Balanced Phono Input (MC and MM), Phono Preamp Direct Output (fixed level), Phono Preamp Direct Output (variable level), Unbalanced EQ Out (fixed level), Balanced EQ Out (variable level)
ELECTRO-MECHANICAL:
- Power Consumption: 60 Watts, nominal
- Power Requirements: 100VAC to 240VAC, 50/60Hz, user selectable
- Fuses (external, 2 required): 2 ea. 1.0A with 100-120VAC mains (5x20mm), 2 ea. 500 mA with 200-240VAC mains (5x20mm)
- Internal Power: +/-50VDC +/-25VDC +5VDC
- Dimensions: 19.0” W x 15.0" D x 3.5" H (2u rack mount)
- Net Weight: approximately 26 pounds