This is a Koch Studiotone Combo. With a retail price of ¥236,500 (including tax) when sold through distributors, it's a very user-friendly tube guitar amplifier. In addition to the sound of each of the three channels, the recording out, which is highly regarded in the Koch LB120II, is also excellent. After being purchased used at Guitar Shop Funk Ojisan for ¥79,400 (including tax), the following maintenance was performed in April 2025 by Okada International: Repair Details: Replacement of deteriorated and noisy Pre Tubes. Replacement of deteriorated Power Tubes. Inspection and repair of Pots and Jacks. Operational check. Repair Labor: ¥22,000 12AX7 (3 tubes): ¥18,150 EL84 (2 tubes): ¥9,900 Shipping: ¥1,012 Total: ¥51,062 I cannot determine the current degree of deterioration of the consumables, but as mentioned above, it has been maintained. I think this is a recommended model even for a first tube guitar amplifier. * In addition to the main unit, a footswitch, power cable, instruction manual, and expired warranty card are included. * The serial number on the warranty card did not match the main unit from the time of the used purchase. * When the standby switch is turned on and off, a "booming" sound may occur, but it subsides quickly, so I believe it is not a practical problem. Please note that this has occurred both before and after the distributor maintenance. * The main unit has some aging. I have tried to describe as much as I noticed above, but there may be points I have missed. I am a private user and believe there are no problems in normal use, but I cannot perform electrical inspections. Also, as mentioned above, I cannot guarantee the current condition of the tubes and other components, so please assume that if anything arises, the buyer will have it maintained by Okada International at their own expense. We cannot accept returns or claims, so please purchase only if you agree to this.