{"product_id":"marantz-model-9-monoblock-amps","title":"Marantz Model 9 Monoblock Amps Fully Restored","description":"\u003cp\u003eFor sale, we have the most coveted of Marantz Amplifiers, the Model 9's. This pair was acquired along with a Model 7 Tube preamp that is available as well.  \u003c\/p\u003e\n\u003cp\u003eWhile we service most of the units that we sell, we were fortunate to have the extremely talented Ben Hase of Novalux Stereophonic do the work on these highly collectable units. Ben is very experienced, talented, and extremely intelligent. Anyone who is able to get a piece of gear that he has restored is very fortunate, as his work is impeccable. All efforts were made to keep the units as original as possible while setting them up for another 50 years of reliable service. The amps were originally purchased as a pair new with serial numbers 9-2786, and 9-2814. \u003c\/p\u003e\n\u003cp\u003eThe following restoration work was performed on these amps:\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eCondition On Arrival: \u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e9-2814 -Drifted screen grid resistor on V8 socket. Poorly executed bias trimmer bypass. Incorrect bias sense resistors installed. 2.7 ohm instead of 3.3 ohm in same circuit. Poorly executed power supply rebuild with white multi-section cap on the outside of the unit. Dirty controls, bias meter not calibrated properly. Triode\/UL switch replaced, missing caps.\u003c\/p\u003e\n\u003cp\u003e9-2786 - Open V6 screen grid resistor. Poorly executed power supply rebuild with white multi-section cap on the outside of the unit. Dirty controls, bias meter not calibrated properly. --- \u003c\/p\u003e\n\u003cp\u003eWork Performed:\u003c\/p\u003e\n\u003cp\u003e9-2814                                                                                                                                         \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRebuilt power supply under chassis on terminal strips.                                                   \u003c\/li\u003e\n\u003cli\u003eReplaced all four axial electrolytic capacitors.                                                                   \u003c\/li\u003e\n\u003cli\u003eReplaced 150Vz Zener diode.                                                                                             \u003c\/li\u003e\n\u003cli\u003eRemoved and cleaned bias meter trimmer, removed modification. Bias meter control restored. Replaced incorrect bias sense resistors and installed correct 3.3 ohm resistor as well. \u003c\/li\u003e\n\u003cli\u003eReplaced Triode\/UL switch with NOS Carling part. Installed missing capacitors.         \u003c\/li\u003e\n\u003cli\u003eReplaced all four screen grid resistors w\/ NOS AB Carbon Comp.                                 \u003c\/li\u003e\n\u003cli\u003eRemoved .22uF paper capacitor and replaced with period correct 600UE Good-All. \u003c\/li\u003e\n\u003cli\u003eRe-tubed.                                                                                                                               \u003c\/li\u003e\n\u003cli\u003eCalibrated bias line to 55mA cathode current w\/ bias probe.                                           \u003c\/li\u003e\n\u003cli\u003eCleaned controls                                                                                                                   \u003c\/li\u003e\n\u003cli\u003eTested all functions (Distortion results attached)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e9-2786                                                                                                                                 \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReworked to be identical to 9-2814 including Triode\/UL Switch, Screen Grid Resistors, Bias Sense Resistors, etc.                                                                                     \u003c\/li\u003e\n\u003cli\u003eCleaned controls                                                                                                                 \u003c\/li\u003e\n\u003cli\u003eTested all functions (Distortion results will be included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNew Apex matched Mullard EL34's are included with the amp.\u003c\/p\u003e\n\u003cp\u003ePhysically the units are in very good condition, and the best examples that we have ever come across. There are some blemishes, however the amps are just beautiful. These amps have a timeless design, as Saul Marantz was an amazing industrial designer. Please see the many pictures in the listing for further details. \u003c\/p\u003e\n\u003cp\u003eThe amps could ship ground, however we will most likely put them on a small pallet and ship them freight just to be safe. We will use heavy duty boxes and polyethylene foam to pack the amps. Shipping is included in the purchase price. \u003c\/p\u003e","brand":"Marantz","offers":[{"title":"Default Title","offer_id":48083795869801,"sku":"001852","price":22995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0267\/5212\/2985\/files\/E27DD03B-AF00-41C9-A38A-9A729D4EEE70_1_105_c.jpg?v=1790569203","url":"https:\/\/recordmarthifi.com\/products\/marantz-model-9-monoblock-amps","provider":"Record Mart HiFi","version":"1.0","type":"link"}