| Threshold FET-2 Series II Preamplifier  Dual-channel non-inverting FET preamp with gain stages consisting of an N-ch J-FET input pair followed by a P-ch MOSFET, all maintained in Class A operation. Accepts MM and MC phono pickups and four line-level sources including tape-loop. Power supply uses large magnetically-shielded toroidal transformer with current capacity ten times that needed, followed by 46,000μF capacitance plus separate +/- voltage regulators for each channel so gain devices are not subject to interchannel supply-modulation effects. FR: -3db @ 5Hz and 100kHz. THD: 0.01% @ 3V into 10kΩ. Slew-rate: 25V/μsec. Output: 14V/pk @ 470Ω.  AllegroSound (Est.1973) Los Angeles, California USA Rick@AllegroSound.com 
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