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Fet Valve Preamplifier Options
The Fet Valve RIAA Stereo Phono Board Note: The following options are for installation in new AVA preamp chassis only. They do not include chassis. For complete SF Phono Preamp, SF Inverter, or SF Buffer units with chassis see those separate products. The Fet Valve RIAA Phono Preamplifier complete with high current MOSFET output circuits to drive the EQ feedback network perfectly, and to handle long cables, complex tape loops, and other difficult loads. Our circuits are quiet, dynamic, musically liquid and transparent and work great with any normal output phono cartridge, head amp, or moving coil step-up transformer. Installed in the Special location (Line 1 with the RB chassis) replacing one set of line level inputs. Not available with bridge option. Available in new Fet Valve EC and Fet Valve SL preamps. The Fet Valve Stereo Phase Inverter Bridge board provides for the direct mono bridging of any pair of common ground amplifiers for more than tripled single channel power. For example, two AVA Fet Valve 550hc amplifiers bridged give you over 1650 real watts! The phase inverter can also be used for balanced line outputs or to drive a second stereo amplifier completely isolated from your main amplifier. It works great for remote system or surround sound use. The phase inverter can make a single stereo amplifier sound better! Run one amplifier channel from an inverted output and the other from a non-inverted output. This puts the two amplifier channels out of phase so that the common drain on the power supply is reduced and residual cross-talk between the channels is attenuated. Reverse one loudspeaker connection to get the channels back in phase and enjoy more power, better separation and improved imaging. The bridge circuits provide inverted outputs at the Line 2 outputs of your Fet Valve EC or SL preamp. Line 1 outputs are normal non-inverted outputs. Not available with Fet Valve RIAA Phono option or in Fet Valve RB preamp. Available in new Fet Valve EC and Fet Valve SL preamps. Buffered Tape Outputs provide a dedicated fast high current hybrid buffered circuit set designed to enhance tape loop performance. Many tape decks and signal processors are terrible loads, causing degraded audio performance, especially when the tape decks or processors are connected but turned off! Although our internal phono circuits can handle these loads, your CD player, tuner, or other source (which in effect becomes directly connected to the tape outputs) may not be so carefully designed. Our hybrid buffered line driver isolates your sources from tape output loads and drives very difficult loads with ease. You will make better sounding tapes and significantly improve the overall musical performance of your system when the tape loops are used. The board connects internally to the preamplifier's tape output jacks. Available in new Fet Valve EC and Fet Valve SL preamps. |
