Audio Research SP 8 Rev. 5 tube preamp S/N # 54121014.
I am the original owner of this unit. It was recently serviced and upgraded in Houston and is in excellent working order. I have rated it as a 7 based on age but could be an 8.
I am selling this because I have replaced it with a new SP 17.
The tubes have approximately 300 to 400 hours since replacement with new tubes from Audio Research. The tubes will be removed, numbered and wrapped for shipping.
I have the owners manual and original box for it.
Shipping to U.S. locations only
For specs go to: http://www.arcdb.ws/SP8/SP8.html