PRT-08A 12AU7+12AX7*2 + 6N11 Tube Stereo Preamplifier Base On CAT SL1
Work voltage AC115V or AC230V for choose
Front panel: Black or Silver for choose
Using 1 pcs Shuguang 12AU7 +2pcs Shuguang 12AX77 +1pcs Bejing 6N11 tubes.
Hi end Oxygen-free copper R-core transformer
Origianl Japan ALPS Type 27 Potentiometer.
Taiwan high quality frosted Pure copper RCA terminals.
Full aluminum chassis + Stainless steel switch
ZERO-ZONE PRT-08A preamp is reference the famous CAT SL1 preamp Circuit , The sound quality is very good. Sharp dynamics, accurate positioning, medium frequency mellow, tube tastes very strong. was considered the almost the perfect tube preamp design.
The CAT-SL1 design tubes are not like the other brands - multiple isotypes; but the targeted tube to meet the school requirements, the first level using U-tube 12AU7, The input tube; the second stage uses a high U tube (12AX7), which is an SRPP structure, taking its bandwidth and buffering between the front and the back, and also preparing for the third level. The third stage is using 6N11, which has a larger screen output current, so as to push the rear stage power amplifier.
The high-voltage power supply uses a regulated power supply, and the MOS tube is used as a voltage regulating tube to make it more tube tastes tube taste.The filament is divided into two sets of voltage regulators, which respectively supply 12.6V for 12AU7, 12AX7 and 6.3V for 6N11
In terms of ingredients, using Panasonic and 718 resistors, gold-plated ceramic tube holders, BC-Philips capacitors, ELNA capacitors, etc., high-voltage regulators using the Toshiba and coupling capacitors are ERO+MKP series, which has a high cost performance.
In the PRT-08A, we added a 30 second delay on the output component.Avoid the whistling of the preamp when power on.
Package include: Finished PRT-08A preamp X 1
Default is not include any cables.
