This Hafler Trans Nova P4000 power amplifier is a top-of-the-line device that comes with exceptional features. With a minimum power output of 550 watts/200W 8ohm, 275W 4ohm, this amplifier is designed to deliver high-quality sound performance. The amplifier class is MOSFET, which offers excellent sound quality. The Hafler P4000 amplifier has two channels and two inputs, making it easy to connect various audio devices. The audio inputs include XLR and Balanced XLR, while the audio outputs consist of raw cable speaker jacks and banana speaker jacks. This power amplifier is black in color and is made in the United States. It is perfect for use in home audio systems and is a must-have for any music lover. This amp was used weekly in my system and the only reason Im selling is because I purchased a higher end amplifier and would rather see this in a good home being used instead of sitting in a closet. This amp is not one of the Hafler kit amps put together by Joe Schmoe, this amp was professionally built in a factory in USA. Also, as I said in the condition section, the amp is perfect except for the green power light which went out a while ago. It never bothered me enough, but you can purchase one on eBay for $10. Otherwise, this amp is incredible and super powerful that it can drive speakers similar to what I have that have a minimum power requirement of 50 watts just to get them going. Just be careful as this amp will blow a lot of speakers and I will not be held responsible. I dont have the original box, so I would rather it be picked up or I can meet you somewhere nearby. If it has to be shipped, the amp is approximately 35lbs and shipping is not cheap. I will do my best to pack properly, but I cant guarantee that USPS or UPS wont handle it improperly. Comes with power cord. Also, just for reference, the signal lights blink. They are not broken, they are supposed to do that. As the signal/music comes in they will blink at lower volumes. As the volume increases the lights will stay fully bright until there is no signal/music, then they will go off again. Any questions feel free to ask and I will do my best to accommodate you. Specs can be found here: HAFLER TRANS-NOVA P4000 AMPLIFIER SPECIFICATIONS | ManualsLibThese 2 pages should answer most technical questions and dimensions.Manual can be found here: HAFLER TRANS-NOVA P4000 AMPLIFIER INSTALLATION AND OPERATION MANUAL | ManualsLib