Up for sale is a vintage Ampex 600 series that has been completely restored and setup for stereo use. This unit has been COMPLETELY REBUILT from the ground up by Electric & Company and is ready to record. We have restored a lot of these Ampex units and modified a ton of them for studio use. The power supply, chassis, and general layout provides all of the necessary infrastructure for a stereo preamp, they just didnt come setup that way. THIS UNIT FEATURES TWO DISCRETE CLASSIC ORIGINAL AMPEX 601 MIC PREAMPS IN ONE CHASSIS. They sound incredible- warm and colored with enough gain for ribbons. We strip the units down to bare chassis- sand, clean, and then re-wire the entire unit from scratch-HAND WIRED POINT TO POINT exactly as designed- but with a layout that optimizes performance as a stereo studio-grade preamp. Power supply is not only re-built, but improved, grounding scheme is enhanced, and all tube sockets are replaced with new ceramic types. AC power is, of course, properly grounded, and all AC heater runs are improved. Please Note: This is a Revision 5 unit which is the latest version of the E&C Stereo Ampex 600 units. Revision 5 incorporates 2 additional switches located on the front panel(pictured) and boasts the best performance of the units to date. In addition to COMPLETELY RECAPPING, REWIRING, AND OVERHAULING the entire unit, we have made some modifications for modern studio use: BOTH CHANNELS COMPLETELY TRANSFORMER BALANCED IN AND OUT WITH TOP OF THE LINE CINEMAG INPUT AND BEEFY EDCOR STEEL OUTPUTS. The combination is very, very nice with these circuits. Tons of gain retaining all of the vintage color and warmth, but with none of the noise, questionable components or unnecessary tape circuits. BOTH CHANNELS FEATURE A PROPER DIINSTRUMENT INPUT located on the front panel feeding the grid of the first tube stages. These DIs absolutely kill. Made the way our good lord intended- a 14 input feeding straight into a vintage American tube stage. BOTH CHANNELS FEATURE INDEPENDENT GAIN CONTROL AND SHARE A STEREO MIC- MIC PAD- and LINE PAD SELECTOR located on the middle rotary switch. These sound TREMENDOUS in Line Mode during mixdown. VU METER SETUP TO TOGGLE BETWEEN CHANNELS, AS WELL AS BYPASS. You can monitor either channel one or channel two, or bypass the meter when driving the unit hard. These units have real VU meters, and pegging them for extended periods can burn them out- the bypass switch allows you to drive the unit as hard as you like, and preserve the meter. This unit is completely overhauled and ready to make fantastic recordings right out of the box. Two of Electric & Companys restored classic American tube mic preampDIs for this price is unreal! Please Note: There is 14 day lead time from time of purchase.