Check the listing for details. Tube guitar preamp based on JMP. Condition: New. Listed at 310.00 USD. I made it according to classic JMP preamp schematics (model1987). Channels are jumped inside and each have their own gain controls (VOLUME 1 and VOLUME 2). There are PRESENCE and MASTER controls as well. TECH• All analog low noise signal path• Two tubes 12AX7. Original anode voltage DC 400v• Internal Toroidal power transformer. No any 9 - 12 v power adapters needed• WIMA capacitors • Treble Middle Bass tonestack • Internally jumped Volume 1 and Volume 2 channels with Master Volume • Boost, Presence• Tube main output• Cabinet Simulated output• ABS plastic enclosure • "Cold" bypass • 5,1 inch x 7,5 inch There are 120v - 230v versions in stock. Some info and feedbacks:https://www.thegearpage.net/board/index.php?threads/has-anyone-used-an-arthur-sound-tube-preamp-pedal.2312689/