By the way, Nuforce amp is actually being used in commercial ultrasound application (acousticeye.com) to detect structural fault 
No kidding, they bought the Ref 9V2 as is (except that we replace the binding post and RCA to more durable type) and put it inside some portable machine.
Notice the practically perfect FR with only +/- 0.3db (!!!) variation from 20Hz to 20Khz and the extension to 150KHz.
Yes a strange story on that.
Late one night (9:30PM) I receive a phone call from a gentleman wanting to purchase an amplifier and he is from Israel. He said it is an emergency that they need the amps for a "
Industrial Presentation" the next morning.
He said he was from Israel and even mentioned they had developed a technolgy for the
Israeli Military, blah blah. (Israeli commandos? Military, my brain is processing

)
I told him all I had on hand were my rather new Ref 9v2 and told him the price. He ask if I would take a check, and I had to decline as it was a check from an account in Israel, and told him all I could do is a "cash only" transaction. The story itself was rather strange, and accepting an international check seemed way too risky.

To make a long story short, their Hotel would not cash their check for that amount either but did advance them some of it. They then visited several ATM's with their whole team's collection of CC's and raised the cash.
At 1:00AM (in the morning) they arrived and I met them in my underground parking garage (almost like a James Bond movie) and there I was counting out cash (mostly in $20 bills) on the back of their Mercedes as they opened and inspected the boxes with the Ref 9's. It was me and four of them.
In all they were very nice fellows and very grateful that
NuFORCE had saved the next day's presentation.

Their technology runs sound waves through closed hydraulic and fluid systems like on Jet planes, or other types of pipelines and detects leaks or weaknesses in the systems. (or at least that is how they explained it)
A couple of my neighbors arrived home and drove past us that night with me counting bills on the trunk of the car and they cutting open the boxes and looking at the merchandise.
One can only wonder what they thought was going on at 1:00am in an underground garage

Such is life as a NuFORCE dealer in Southern CA

Now if Tom Cruise, Daniel Craig, or M call, I'll not bat an eye (but they will still pay cash)