All of the small signal transistors are new on the amp boards and the meter board. The driver transistors on each amp module are new as well.
This wasnt due to them being faulty but done as an upgrade to the originals and to ensure safe operation for years to come. The DC offset is steady at below 10mv per channel thanks to a circuit revision in the differential-feedback stage. Bias is steady and the amp has had the current limiters set for zero distortion up to and beyond the rated 150 watts per channel. Dont spend freely on estate and thrift store finds cause theres lots of surprises with those units and theres no way theyll sound as good or operate without faults like a rebuilt unit.
Since this is a very heavy vintage item make sure you can solve small issues on your own........... I can't offer a return due to the size and weight. The item "Pioneer Spec-4 Flagship Power Amplifier Fully Pro Restored Near Mint" is in sale since Sunday, June 21, 2020.This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "ohmbob" and is located in Palm Harbor, Florida. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.