Threshold Preampli Fet 2 Series 2 Manual
The Threshold FET nine/e ($2595) is the junior sibling of the FET ten/e, a solid-state preamp that has earned a rave review in March 1991 from noted tubeophile Dick Olsher (Vol.14 No.3), itself a development of the FET ten that J. Gordon Holt (Vol.10 No.6). Nissan data scan ii. Would my ears, accustomed as they are to the pitter-patter of electrons traveling through a vacuum, have a similarly positive response to the FET nine/e? The first thing I noticed about the FET nine/e is the outboard power supply: connected to the preamp with a flexible umbilical cord, this is quite a substantial piece of equipment itself, making the power supply of the original FET nine seem as if it should only have been used with a calculator.
(The power supply is identical to that used with the FET ten/e, except the FET ten/e has two such power supplies, one for the phono and one for the line section.) Unlike many such devices, the power supply's transformer emits no audible mechanical hum. An outboard power supply eliminates the possibility of magnetic, thermal, and vibrational interfering effects of the transformer on the preamp's circuitry; the only real disadvantage of this design seems to be cost. The FET nine/e's phono section has switchable high or low gain, the high-gain setting suitable for low-output moving-coils, and with switch-selectable settings for impedance and capacitance. The tape outputs have 100 ohm resistors in series, providing a small degree of buffering. Volume control is set with a stepped 32-position attenuator; the steps are 3dB at the upper and lower ends of the range, 1.5dB in the center. In their literature, Threshold makes a point of emphasizing the commitment to a minimalist design approach, with as few components in the signal path as possible but with extensive attention paid to bias and power-supply regulation. As the model designation suggests, the Threshold nine/e uses J-FETs and MOSFETs (no, not nine of them), the J-FETs in a parallel-pair configuration to reduce noise.
Threshold Amplifier - Overview and Schematic Collection of all Models. Threshold FET1 FET-2 (two series). I do have a copy of the Threshold service manual. Mar 30, 2011 Category: Preamps Threshold released the FET II Series II in 1985 as a upgraded replacement for the original FET II. And was in production until 1989 when the FET 9 was released.
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Construction quality is first-rate, with extensive use of metal-film resistors and military-grade glass-epoxy circuit boards. Sound Quality The Threshold FET nine/e arrived without a manual, and I had no way of determining what the phono stage gain, impedance, and capacitance switches had been set at, so my initial listening was only to the line stage.
The sound I heard was clean, clear, crisp (I'm starting to run out of 'c'-words), with fine dynamics, good bass extension, andI'm sorry to sayjust a bit on the hard, 'transistory' side. In my opinion, the Achilles' heel of digital recording/playback is how it handles complex orchestral and choral sounds; the FET nine/e revealedand, I think, exaggeratedthese problems to an extent that made some recordings difficult to listen to.
Bose Companion 2 Series 2 Manual
For example, played through the FET nine/e, the orchestral tutti on the Mehta Swan Lake (London 410 551-2) had a hardness that was distinctly more annoying than via the or the. With the amplifier rather than the Luxman MQ 68C in the system, this hardness was exacerbated, the residual hardness of the amp adding to that of the preamp. Custom and vintage sdx. Listening to a CD transfer of some early Fritz Wunderlich material (Sonic CD 74505), I was struck by how poor the recording quality was, with considerable spittiness evident on sibilants.