Whirlwind P-12 User's Manual
Contents
1. US Audio whirlwind 99 Ling Road Rochester NY 14612 585 663 8820 Fax 585 865 8930 techsupport whirlwindusa com P 12 STEREO POWER AMPLIFIER AND HEADPHONE DRIVER OWNERS MANUAL Congratulations on the purchase of the US Audio P 12 power amplifier The P 12 is a stereo 12 Watt amplifier capable of producing moderate listening levels through speakers and headphones Front Panel Channel and 2 volume controls These knobs vary the amplifier output level Channel and 2 Clip LEDs These LEDs will light when the P 12 amplifier output is approximately 3dB below clipping You will hear audible distortion if the amplifier is run at clipping Headphone Phones Speaker switch When this switch is in the speaker position out the speaker out terminals on the back panel are active while the headphone jack on the front panel and the XLR headphone jack on the back panel are off When this switch is in the headphone position in the headphone jack on the front panel and the XLR connector on the back panel are active and the speaker terminals are off Phones jack This is a quarter inch tip ring sleeve headphone jack The unit will operate properly with 8 Ohm to 600 Ohm headphone impedances Rear Panel CH1 and CH2 Input Jacks These jacks are quarter inch unbalanced audio inputs Headphone Out XLR This headphone output XLR connector is active when the Headphone Speaker switch is in the headphone position When used with the US Audio Hea2. dphone Satellite boxes and standard microphone cables the P 12 can drive multiple sets of headphones with individual volume controls CH1 and CH2 Speaker Outputs These speaker terminals are active when the Headphone switch on the front panel is in the speaker position The P 12 will drive impedances of 4 Ohms or greater SPECIFICATIONS Frequency response Output power both channels driven Signal to noise ratio Input impedance maximum Input level output protection Minimum output impedance THD Rise time Equivalent input noise Maximum output level 20Hz to 30kHz or 3dBm 11Watts RMS into 8 Ohms 14Watts RMS into 4 Ohms Greater than 90dBm 20kOhms unbalanced 16dBm Thermal and short circuit protected 4 Ohms 2 at OW 3uSec 78dBm 18dBm
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