1. Q. How loud should the volume be on my portable source?
A. Turn the volume all the way up or one step down from all the way up, depending on the player. Use your best hearing judgement to determine the best combination for you.
2. Q. What is the included cable?
A. The cable is a mini to mini cable that runs from your audio source to the audio input of the AirHead.
3.Q. Will I damage my amp or headphones if I plug them in with the volume up?
A. Yes, possibly! The AirHead is a miniature power amp, and is quite capable of blowing its miniature self up if it has to drive the short circuit of not-fully-inserted headphones. Please be careful to have the unit off, or the volume fully down, and see that the plug is fully inserted when connecting headphones to the amp.
4.Q. Can the unit drain the batteries even when it’s turned off?
A. No, it will not drain your batteries. If you are storing the unit for a period of time, it is a good idea to remove the batteries to prevent accidental leakage.
5.Q. How long do the batteries last on my AirHead?
A. Depending on the type of headphones that used, The AirHead can generally be powered for 40+ hours on 4 AAA batteries. Headphones with lower impedance will last longer than headphones with very high impedance. We have heard some users get nearly 60 hours of battery life with very efficient headphones (such as in-ear isolating buds).
6.Q. Does the AirHead have a separate line out?
A. No, it does not have a separate line out. You can use the headphone jack with confidence though; remember that, as a general rule, headphone amp outputs are just like good preamp outputs.
7.Q. What is the voltage requirement of the AirHead?
A. The maximum voltage the AirHead will accept is the standard 6 volts from four AAA batteries. When using the available HeadRoom wall-wart AC power supply ($14.95), the AirHead can accept 9 volts.
8.Q. Does my new equipment require ‘break-in’ time?
A. Both headphones and headphone amplifiers require break-in time before they are at their optimal performance. We recommend running your new headphone amp and/or headphones for about 40 hours to allow sufficient break-in time.
9.Q: Why do I hear hiss coming from the iPod & TAH amp using my triple microdriver ear canal headphones?
A: There could be several reasons; Make sure the amp's batteries are at full strength. Weak batteries will increase background noise floor issues. If using a new generation HeadRoom Total AirHead, ensure the amp is set to the low-gain position. Turn the iPod/ Mp3 player volume level [output] to near max around 8 or 9 and then use the TAH amplifier as your master volume control for your earphones. Finally, you may wish to pick up a dedicated iPod dock that allows interconnectivity from the player's bottom pin configuration instead of using the low-grade (and noisy!) headphone jack as a line-out to the amplifier. Keep in mind that superb triple-microdriver earphone designs are very accurate and extremely revealing of any flaws in the audio source.