Vintage Dynaco A420 tube stereo amplifier x4 7591/5AR4 &provenance MC225 works
Wednesday, April 2nd, 2025PLEASE REVIEW PICTURES ONE, THREE, FOUR AND FOURTEEN FOR SOME EXCELLENT INFORMATION SUPPORTING THIS RARE AMPLIFIER’S PROMOTION DURING THE INTRODUCTION OF THE 7591 OUTPUT TUBE. Item is from a smoke free home. Please see all pictures as they are an integral part of this description. Please utilize ZOOM for any extra assistance viewing pictures. Item is in excellent overall condition considering it’s age and item does show some wear/age. Please review all clear pictures and video as they are an important part of this description. Item is free from any large amounts of loose particles inside/outside it’s original metal chassis. Item also looks to be free from any major damage, non original drilled holes, etc. Please also note this unit does power on. (works) Item was briefly tested with a variac as pictures four and six demonstrate. (works) This stereo tube amplifier was always briefly tested with a pair of period Acoustic Research and an early, mono Blue Note pressing as demonstrated. (works) No further testing was completed with this tube amplifier, nothing rigorous. The original ELECTRONICS WORLD magazine is dated 1961, complete and included as shown. All tubes are not included with this listing; only the quad 7591 type stereo amplifier and it’s matching literature/provenance. Please see pictures six and seven for more details concerning the dated 1961 ELECTRONICS WORLD magazine which features THIS 7591 type AMPLIFIER on it’s cover; the piece of paper with repair, update, restorations, specs, etc. Is included as shown and found. There are no dates on the restoration paperwork, please make a note of this as this is a vintage tube power amplifier from the late fifties/early sixties. Considering the rarity of this vintage stereo tube amplifier, it is certain that there are not many period correct “survivors” out there. Item will make a great addition to any vintage audio assortment, collection, etc. As with all vintage electronics, a qualified person and/or technician should go through this item before continuous use. Original Westinghouse/Dynaco type quad 7591 type power tube stereo amplifier. Item(s) is not stated as brand new & sealed in condition. Please see and read (if at all possible) all pictures and utilize ZOOM for more details. Please feel free to ask questions if needed. Thank you for your interest and time. ITEM WILL BE PACKAGED CAREFULLY WITH TIME AND EFFORT FOR SECURE TRANSIT.