NOS Hafler P500 Power Amplifier (Pro version of the DH500) Owner's-Assembly-Kit Manual.Includes schematics, parts listing, photos and illustrations of internal wiring. BRAND NEW pristine book -- not soiled or dog-eared. Purchased directlty from Hafler as part of my 1993 parts buyout. Never before offered! I bought all of these Hafler had in the 1990s. Thanks for looking and good luck! International Buyers – Please Note: OVERSEAS BIDDERS WELCOMED! Take advantage of the opportunity to combine several different small parts orders (up to 4-lbs total)... and pay only ONE $12.95 USPS Priority Mail International Flat Rate Envelope fee -- a true shipping BARGAIN in today's world! Just pay for all items at one time in the same ONE Paypal payment... or simply wait for ME to bill you for all your combined items. Your total will reflect the most advantageous shipping rate -- at my cost. Also, please note that I also now offer the sometimes cheaper (but always slower) First Class International shipping. (WARNING: Be prepared to wait!) I much prefer to use the USPS Priority Mail International Flat Rate Envelope. Remember, I don't seek to earn a profit on overseas shipping. I just want to recover the cost of postage and packaging materials. OVERSEAS DELIVERY DELAYS. Please remember that I have NO control whatsoever over possible customs and delivery delays which may occur in your country. Most overseas customers are surprised by how quickly they receive their orders. But in the event of a delayed order, I ask only that you be fair -- JUDGE MY SERVICE BY THE TIMELINESS IN WHICH YOUR ORDER IS SHIPPED ( after your payment has been received). This date is usually the same or next business day. PLEASE... PLEASE... DO NOT judge me by when you receive your package -- as that is something I cannot control in any way. International Buyers – Additional Notes: Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up – do not confuse them for additional shipping charges. We do not mark merchandise values below value or mark items as "gifts" - US and International government regulations prohibit such behavior.