I am the second owner. I've had it since 2009. It's been in storage for the past year. This is a hybrid "best of both worlds" design with a tube front end buffering a solid-state amp. (Please see website copy below.) Cosmetically it's nothing to write home about but it sounds great.  Absolutely no WAF even when new, though the blue glow from the five tubes is cool.

This is a home theater piece. I ran it bi-amped for the front L and R and used the remaining channel for Center. Sweet, solid and warm. Not ultra tight, solid state Krell thud but plenty of grunt. Tuneful and musical. Add one or two subs if you want dinosaurs in your living room. 
Butler provided me with a new on/off switch a few years ago which I had installed by one of the better techs in LA. Unit runs cool to the touch, needs a bit of venting is all. Connectors are beefy and you can use your favorite power cord. 
Rated 5 to avoid any discussion when you get it and priced accordingly. 

• The left side panel looked like that when I got it - the paint is peeling/flaking. The panel could be replaced, or sandblasted and painted if it mattered to you. 
  
  


• Yes there is a screw missing at the top back of the right panel. 
  
  


• Please look carefully at close-up of the 3" scratch/gouge on the top- that won't come out easily. 

The good news is that none of this affects performance or is visible. Once you put it in a rack or cabinet you will be very happy and forget all about it. You'll smirk and say, yeah I got it for a grand...

Sell price includes having my local crating company build a new outer box. Shipping will be at cost via the carrier of your choice. Weight is 60 pounds.

Selling because I am seriously downsizing and getting out of the surround game. 
It is almost impossible to buy 5-channels of 150w sound like this for the asking price.  
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BK Butler's Tube Driver BLUE technology places the triodes exactly where they should be: DC coupled through the output power devices to the speakers. Therefore, the tubes are positioned to naturally and actively respond to the dynamic speaker load. This also completely eliminates one of the most inefficient and non-musical components in a typical tube power amplifier: the Output Transformer. Without the phase shift and induction generation caused by hundreds of turns of wire and massive core iron to overcome, BK Butler's newly patented current multiplying DC coupled circuitry allows the 6SL7GT output driver tubes to directly operate into the constant ratio-reduced speaker load. This novel design allows the tubes to safely produce authentic power vacuum tube dynamic characteristics hundreds of times greater than their original design capabilities.

General features:

• ZERO negative feedback. No global degenerative 
negative feedback loop
• Open Ended Audiophile Circuitry• Musical, warm and dynamic• Load Independent; Will drive any speaker• Hand selected/matched 6SL7GT Twin Triode tubes 
(One per channel)
• Fully regulated Tube Heaters with Delayed Soft Start 
(10-15 second turn-on delay)
• Load Adaptive Vacuum Tube Driven output circuitry• Modular power channels with a seperate massive, oversized heatsink for each channel• Independent AC Secondaries and Rectifiers 
with 20,000µF per channel filtering• DC fault / Short Circuit Protection Circuitry• Diagnostic LEDs: Red=Fault• Custom-made Hard Gold Plated Eutetic Brass RCA connectors• Custom-made Hard Gold Plated Eutetic Brass 5-way Binding Posts• Frosted Platinum finish• Tube Illumination: Internal BLUE LEDs• Patented Design• Concept & Design: BK Butler / USA

Specifications:

• Rated Power (all channels driven):
5 x 150 Watts RMS per channel @ 8 ohms
5 x 225 Watts RMS per channel @ 4 ohms• Freq response: 20Hz to 20kHz (+/- 0.5dB)
Power Bandwidth: -3dB, 50kHz• THD: <0.10% @ 8 Ohms, <0.15% @ 4 Ohms• S/N Ratio: Better than 110dB (A-Wtd)• Slew Rate: 15v/µsec• Input Sensitivity: 1.5V for 150 Watts into 8 Ohms• Input Impedance: 47k Ohms• Idling Consumption: Approx. 120 Watts
(Approx. 1A @ 120VAC or 0.5A @ 230VAC)• AC Consumption (Nominal power): 
1200 Watts @ 8 Ohms - 10A (120VAC), 5A (230VAC) 
1800 Watts @ 4 Ohms - 15A (120VAC), 8A (230VAC)• Dimensions: 17"W x 16"D x 8.5"H w/feet (7"H w/o feet)• Weight: 48 Lbs. (19.2Kgs.)