I will be at the meet. I will be bringing the A-10 black addition, electrostatic headphone amp with STAX 009. B-52 fully balanced tube amp, The Apache balanced solid state amp, The Raptor tube amp. The Stealth tube amp & all the fully balanced portable amps. I will donate the PROTECTOR balanced...

The output impedance is 2-600 ohms...

You can NOT charge the Intruder via USB from any PC or power source. You need ONLY the supplied Charger that is designed for Lithium Ion for the 4 pack battery of the Intruder. The charger is only $35.00. Any other power adapter could over heat & destroy your Intruder...

If you are using any smart phone BUT the iPhone with the Intruder, you will need a short little cable that has MINI B USB connector at one end & MICRO B USB on the other end. I devices will NOT work with the USB DAC of the Intruder unless using the Camera kit. If your device is modified by RWA...

I have used the expensive OPA627BP nine years ago in my XP-7 in conjunction with BUF634 & offered it 10 years ago with my first amp the HR-2 as an option. It is a great chip but it has high input noise which I won't recommend it in now a days portable amp that are designed for IEMs. I read both...

I reply to every e-mail that comes my way every 2-3 hours, I never skip any one of them no matter what the question might be. Ray Samuels

The DarkStar was not designed to drive low impedance headphones, any portable solid state amp can drive the low impedance very well. Dark Star has too much gain for low impedance phones even with it's low gain of 11. The DarkStar, with low gain of 11, works great with high impedance phones...

F-35 can drive HE-6 to acceptable level but it is limited to the battery voltage as it can not swing more than 16 volts, which is perfect for all hard to drive phones & high impedance but the HE-6. If you want the portable that can swing around 36 volts in balanced then the SR-71B & the...

Please wait till you get your balanced cables & you will be very happy.

SR-71B & the Intruder are balanced left to right channel ONLY ONLY through the balanced output plug. Using SE output you might have imbalance between left & right channel. The amp was meant to use the balanced output. Please do not touch the balanced knob adjustment as you will through off the...

Try by calling me, I am always there to pick up the phone, my friend. It seems that either your e-mail does not accept my reply so it comes undelivered or check my e-mail address, make sure it has no misspelling. 

  Keith... I use the F-35 with HE-6, it can drive it very well to a very acceptable sound level. Also in balanced it can drive my HD600, 300 ohms with ease. There should be no problem driving DT880, 250 ohms. I have one but in SE & it sounds great & it takes that edge of brightness that DT880...

Quote: Just think of the millions of dollars in merchandise, that are sitting in the warehouses around the World, designed around Apple products and now they are useless. Car manufacturers included a 30 pins connectors in their Audio design so consumer would enjoy their iPods/iPhones in...

Quote:     Change your batteries as the voltage is too low for the amp to work, even though the light is on. Though the amp worked the next day it will shut off because the batteries need to be replaced. Please read your e-mails as I have sent you 2 e-mail regarding your amp. Do not...

Quote: The Predator was designed for low impedance headphones & IEMs. When pairing it with HD600, 300 ohms, high impedance headphones, the battery voltage, 3.7, is not sufficient enough to play at "high gain" the headphones that was not designed for that's why you get that clipping noise...