NEW Whirlwind PA 1 high output pro Headphone Amplifier

INSTRUCTIONS FOR INTERNATIONAL BIDDERS
Shipping for international bidders will be determined at auction close, and will be at actual rates. All items will be insured for the winning bid price, and this will be included in the shipping quote.

Payments can be made by direct bank transfer (SWIFT or ABA number). Paypal is also OK as long as your account is verified, and we must ship to your confirmed address. Other money transfer methods are available, so please contact us for details. Winning international bidders will be responsible for all customs, duties and fees required in your country. We are registered as commercial shippers, so customs regulations do not allow us to declare items as a gift.

The PA-1 accepts line level inputs and will monitor both separate balanced left and right feeds and unbalanced stereo signals on a single connector. Each channel has a female XLR and a 1/4” TRS jack that are parallel wired with pin 2 wired to tip, pin 3 wired to ring and pin 1 connected to shield. This feature allows for loop through operation with commonly available adapter cables. The input mode select switch changes the input wiring from balanced left and right to unbalanced stereo. The XLR and 1/4” jacks are all paralleled together in unbalanced stereo mode. After the input hardware the audio can be attenuated by 20 dB by applying the pad. Signals are then routed to balanced buffers and the stereo gain circuit. Volume is controlled by a dual gang potentiometer, which provides a gain range of -60 to +15 dBm of gain. The volume control has an audio type taper from the 9 o’clock to 3 o’clock positions with larger amounts of gain and cut at the extremes (above 3 o’clock and below 9 o’clock). The stereo signals then go through a standard audio taper pan potentiometer, for balancing the signal in the two earpieces. The stereo/mono switch, when in mono, allows the PA-1 to be used as a two mix monitor. In mono mode, the pan pot serves as a mix control adjusting the blend of the two input sources in both ears. The output drivers of the PA-1 are capable of delivering high sound pressure levels with low impedance headphones. Turn the volume control down before putting on headphones to prevent accidental ear damage. Both 1/4” and 1/8” jacks are available on the PA-1 for use with all types of headphones. The PA-1 is powered by 2 nine volt batteries or the supplied PS-24 wall power supply. When using the PS-24, the batteries are automatically disconnected.