SAE Mark XXXIB (31B)Stereo Power Amplifier 1979 Vintage ...Recently Refurbished in Our Shop....Excellent Working & Cosmetic Condition!......Powerful Clean Audio Performance! Features/Specs:Brushed aluminum front panelSatin black finish steel & aluminum case/chassisPower output: 50 watts per channel into 8? (stereo)Frequency response: 1Hz to 100kHzTotal harmonic distortion: 0.1%Damping factor: 150Input sensitivity: 1VSignal to noise ratio: 100dBSpeaker load impedance: 4? (minimum)Overload protectionFusedDimensions: 15 x 9 x 4.5Weight: 15lbsServicing Details: All New: Main filter capacitors (Quality Nichicons)All remaining electrolytic capacitorsPower output Darlington transistors (Motorola upgrades)Driver transistor array ICsDifferential pair transistorsMetal film resistors (where needed)Indicator lamp---------------------------------------------------------------------- Fully cleanedDC offsets and biases set to factory specsBench tested Ships Fed-Ex.....Please Visit Our eBay Store!

Vintage 1970s SAE Mark XXXIB (31B) ~ Solid State Stereo Power Amplifier ~ 50WPC Fully Functional. Light not working ___________________________________________________________________________Please take advantage of the zoom feature on the photos to judge cosmetics for yourself. What you see in the photos is what exactly you receive. If its not pictured its not included.For orders with the Free Shipping, we reserve the right to use the most cost-effective means of shipping. In-store pickup only available by prior arrangement ONLY.Shipping: We ship all items within 1 business days of receiving your cleared payment. (Excluding weekends and holidays) Additional shipping fees will apply for all Alaska, Hawaii and U.S. Territories (Guam, Puerto Rico, Virgin Islands and etc.) shipments. To ship a large item to PO boxes, APO or AFO zip code also will be charged additional shipping fees. If items are damaged in transit, a claim should be filed with the carrier. We can file the claim if you wish. Please contact us immediately if this happens, as we cannot be responsible for how packages are handled during shipping. Please save box and all packaging material for carrier inspection.Disclaimer: We include these additional lines for our mutual protection, but if you check our feedback, you can trust that we go out of our way to ensure the satisfaction of our buyers, as our business will only be as good as our reputation. Please contact us immediately if there is a problem, we cant solve it if we are not made aware of it. Please dont let us know by leaving bad feedback if theres an error, please give us the chance to make it right. All items we list on eBay are in good working condition upon listing, unless otherwise noted. If we are not sure, we say that, so please dont expect us to take back an item if it has not been fully tested. Although it worked when we tested it, there are no warranties offered or implied. Make sure you know what you are buying. We do not guarantee compatibility with your software and/or hardware and/or electronic equipment, nor can we be held responsible for buyers remorse. We want you to get what you want, so please understand YOUR RISKS and ask all questions BEFORE you purchase. Not all equipment can be tested for 100% functionality. Some items are tested for basic power up capability only. If something is not in the pictures or description it is probably not included, unless it is specifically listed as included.