Whirlwind PA-1

Whirlwind PA-1 інструкція користувача

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  • The whirlwind PA-1 is a high quality, portable stereo headphone
    amplifier designed to deliver superior sonic accuracy in any audio
    monitoring application. High output level combined with very low
    distortion make the PA-1 suitable for critically listening to all
    professional audio sources in any environment. The PA-1 accepts
    both balanced and unbalanced stereo line level signals through
    paralleled XLR and 1/4” TRS inputs. A switch changes the input
    configuration from separate balanced stereo inputs to unbalanced
    TRS (ring-right/tip-left) for sources such as headphone jack outputs.
    Power is supplied by two nine volt batteries that load into easy access
    drawers or an external AC supply which is included.
    MPLIFICATION SYSTEMPERSONAL A
    LEFT
    INPUT MODE
    R=PIN 3=
    RIGHT
    1/8” MINI
    HEADPHONE
    1/4” TRS
    PAN
    STEREO/
    MONO
    STEREO
    LEVEL
    CONTROL
    20 dB PAD SWITCH
    UNBAL STEREO
    T=PIN 2=L
    R=PIN 3=R
    ALL JACKS
    PARALLEL
    BALANCED L/R
    T=PIN 2=+
    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.
    CIRCUIT DESCRIPTION
    This product is guaranteed to be free from defects in materials and
    workmanship to the original purchaser for a period of (2) years from
    the date of purchase. Should service be required, return the unit
    postage prepaid along with the original sales receipt to:
    whirlwind
    Attention - Repair
    99 Ling Road
    Rochester, New York 14612
    The warranty on this product shall not apply to defects or damage
    resulting from abuse, abnormal use or from repairs or modifications
    performed by anyone other than whirlwind. If it is determined a
    manufacturing defect has occurred, whirlwind will repair or replace the
    unit at our option and pay the postage back to you.
    THIS UNIT IS CAPABLE OF DELIVERING
    HIGH SOUND PRESSURE LEVELS.
    PERMANENT HEARING LOSS CAN RESULT
    FROM EXPOSURE TO VERY LOUD SIGNALS.
    MAKE SURE TO TURN THE VOLUME DOWN
    BEFORE CONNECTING HEADPHONES.
    WARNING
    WARRANTY
    ®
Whirlwind PA-1

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Характеристики продукту

Загальна інформація
Бренд Whirlwind
Модель PA-1
Продукт Приймач
Мова Англійська
Тип файлу PDF