Original owner. Battery powered or runs on AC. Extremely quiet and palpable imaging due to low noise floor. Read the many positive reviews of Red Wine products.
Used with Zu Superfly and Evolution Audio MMMicroOne speakers ( 87db ) speakers. This is my fourth Red Wine amp over last eight years.

Per Vinnie, the Signature 15 compares very well sonically with the Red Wine Signature 30.2 integrated amp, but sells for half the price. If 15wpc into 8 ohms will do the job (30 wpc into 4 ohms), Signature 15 is an unbeatable value!
• Remote volume control
• 3 switchable analog inputs
• All new discrete, Class AB FET output stage
• Tube-buffered preamp output jacks can drive active subwoofer or other amplifiers
• Like all our products, the Signature 15 is hand-built in the USA
Specifications
Circuit Design
Included tube
6922/E88CC dual triode
Accepted tubes
6922/E88CC, 6DJ8/ECC88, 7308/E188CC, 7DJ8/PCC88, 6N23, 6H23, 6N11, and 6GM8
Power output
15 Watts RMS per channel into 8-ohms
30 Watts RMS per channel into 4-ohms
Recommended nominal speaker impedance
4 to 16 ohm
if you have questions regarding your particular set of speakers, please feel free to contact us)
Input Impedance
50k
Input sensitivity
Approximately 0.5 Vrms
Battery Pack / Charger
Battery
Red Wine Audio 25.6V LiFePO4 battery pack
Battery charger
30V, 2A LiFePO4 battery charger; Input voltage range: 100-240Vac, 50/60Hz
Typical continuous play time in battery mode between full charges
Approximately 6 hours
Electronics
Dimensions
12" width x 10.5" depth (including volume knob and rear panel jacks) x 3.5" height (including feet)
Weight (wihout charger)
Approximately 8 lbs.
Package weight
Approximately 14 lbs.
Seattle area zipcode 98004
Buyer pays shipping. Split PayPal fees.