Description
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 design path 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
- Lovingly hand-crafted in Northern California
Specifications
PHONOGRAPHIC PREAMPLIFIER & GENERAL:
- Input Amplifier Signal Path All Discrete J-FET True Differential Gain Amplifier (IMA-01)
- EQ Amplifier Signal Path All Discrete 50V J-FET Servo (FSA-03)
- 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
