Nagra
BPS
The Nagra BPS is a phono preamplifier manufactured by Nagra from 2009 to 2015 for moving-coil (MC) and moving-magnet (MM) cartridges. It uses transistor circuitry derived from the PL-P and VPS designs, Nagra-made magnetic glass-metal-core input transformers in μ-metal shielding, a battery-based power supply, and user-configurable loading modules and jumpers, with 64 dB total gain switchable to 49 dB. The unit has a single-board construction with directly soldered connections, gold-plated RCA inputs and outputs, a brushed anodized-aluminium enclosure, 20 Hz–30 kHz RIAA-conform frequency response, and dimensions of 110 × 27 × 160 mm.
MSRP
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Original list price not on record.
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Specifications
- Dimension
- 110 x 27 x 160 mm (4¼ x 9∕16 x 6¼ inches)
- Total gain
- 64 dB, switchable to 49 dB with internal jumpers
- Weight
- 480 g (16.9 oz) lbs
- Output level
- 2 V
- Power supply
- 1 battery 9 V type 6LR61 (PP3)
- Loading modules
- 6 modules supplied (100, 150, 220, 330, 470 Ω and 1kΩ)
- Riaa stage gain
- 53 dB
- Input connections
- RCA-Cinch (gold-plated)
- Power consumption
- 70 mW
- Channel separation
- Typically 60 dB
- Frequency response
- 20 Hz (+1dB) at 30 kHz (0dB) RIAA conform
- Input circuit load
- 47 kΩ without load module installed
- Output connections
- RCA-Cinch (gold-plated)
- Harmonic distortion
- < 0,15%
- Power supply external
- 94-132 V or 188-264V / 44 to 66 Hz
- Signal to noise ratio
- > 77 dB (ASA A)
- Estimated battery life
- Approx. 100 hours
- Transformer gain MC input
- Ratio 1:3.54 (+11 dB)
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