LOCi Analog Legacy Phonograph Playback System
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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 | 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 |
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