FX-AUDIO- TUBE-00J UNLIMITED. [One Owner]

・Items Included
FX-AUDIO- TUBE-00J UNLIMITED [Black]
TUBE Ring Vibration Damping Rings (Set of 4) [Deep Red]
USB to DC Plug 12V Step-Up Cable [1M]
Tested USB Adapter [Apple Genuine]

・Description
This is a set of four items: the FX-AUDIO- TUBE-00J UNLIMITED (Special Limited Production Model with OPA627 installed), vibration damping rings, a USB to DC plug 12V step-up cable, and a USB adapter.

This is a one-owner item.
Purchased from NFJ Store in May 2022 and used for approximately 6 months. After purchasing a different preamplifier, its usage frequency decreased. It was then stored in its original box in a closet for about 3 years. Due to needing funds for my hobbies, I have decided to sell it.
Total usage time is approximately 70 hours.

The delivery slip from NFJ Store is available, but it will not be included as it contains personal information.
The unit has been disassembled twice for cleaning only; no modifications have been made.

・Condition
/Due to very low usage time, there are no particularly noticeable scratches.
/A USB-DC cable is included, but it will not operate without a USB adapter capable of outputting 5V and 1A or higher. With a USB adapter, slight noise can be detected. It is recommended to purchase a compatible AC adapter and noise filter from NFJ Store or similar retailers.
/There was no noise when using a separate AC adapter (not included).
/Sound output was confirmed from both L and R channels.
/During testing, it was used continuously for approximately 2 hours without any operational issues.
/There was a slight crackling sound between the 7 and 9 o'clock positions on the volume knob.
/Internal capacitors and other components were normal, with no signs of leakage or swelling.

・Other
When using the included USB-DC cable, please use a USB adapter with a 5V-1A output or higher.
Using a USB adapter with less than 5V-1A output may result in symptoms such as LED lights up but no sound, or LED blinks erratically, rendering it unusable.

The main unit and accessories will be lightly disinfected with alcohol before shipping, so please buy with confidence.
Immediate purchase is welcome.
Please check the photos for the condition of scratches and dirt before purchasing.
If you have any questions, please leave a comment.
No warranty is provided.
Ships via Raku Raku Mercari Bin, size 60.