These are the highly sought-after Studio model that set horizontally. The woofers are brand-new (New Old Stock) only broken in for a few days. They are the J 1801 A model These sound like a dream and if you know that NS10M STUDIO monitors are what you are looking for these are it. If you do not know the Yamaha ns10 I will explain them a little for you ,they have a sound that sounds good if you have a great mastered song If you do not know what you are doing they will sound horrible this is the whole point of them you need to work very hard to get your song polished enough to make them sound good on these speakers you have a very well mastered song it will sound good on any stereo. Sometimes your studio monitors sound so good they make your song Sound HiFi or enhanced and then you hear it on another stereo and it sounds flat, the NS 10 will help you with this problem called translation The speaker's require a professional amplifier I would not recommend using a home stereo to power these. I would say 200 watts per side and do not turn it up leave the head room These are beautiful speakers in great condition there are some light scuffs on them and some white marks on the bottom but they are just so perfect sounding it's amazing and the stereo image is out of this world I will pack them so safe you will never receive them damaged in a million years comma I understand these are very serious speakers PayPal only Continental u.s. shipping and sales only Item will be shipped FedEx and will require signature upon receiving