Whirlwind HATT-AES Headphone Amplifier

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  • Product Highlights
  • Digital AES3 to Stereo
  • 3.5mm TRS Input Jack
  • Signal Present LEDs
  • Buffered AES Output

Table Top Active, Digital to Stereo Headphone Amplifier

The Whirlwind HATT-AES is an active headphone amplifier that converts a digital AES3 stream into a high fidelity, low distortion stereo headphone signal optimized for modern 32 Ohm headphones. Sample rates from 32 kHz to 192 KHz are recognized by the HATT-AES D/A converters. Features include an analog 3.5mm TRS stereo input jack, analog signal present LEDs, and a buffered AES loop-thru output. The headphone output can also be used as an unbalanced stereo line driver.

The HATT-AES is powered by an included model #PS6 "wall wart" supply. Both 1/4" TRS and 3.5mm TRS headphone jacks are provided and the volume control adjusts the listening level. The HATT-AES is housed in an attractive, durable ABS box for placement anywhere a high quality headphone driver is required.

Front Panel
The single volume control adjusts the level delivered to both left and right earpieces. The PWR LED indicates operational status, the LOCK LED shows connection with a valid AES3 stream (32 kHz to 192 KHz sample rates) and the CHA and CHB LEDs display analog audio presence at the output of the D/A converters. Although 1/4" TRS and 3.5mm TRS headphone jacks are included for convenience, only one jack should be used at a time.

Rear Panel
A3.5mm stereo TRS jack is provided for injection of unbalanced stereo signals. The AES3 input is a female XLR. Both AES3 digital and 3.5mm analog inputs can be used together if required. The AES thru XLR male jack provides a buffered, latency free, output of the input signal for daisy-chaining several units together with the same AES3 stream. The 2.1mm power input jack is for connection to the model #PS6 6 Volt DC power supply.
  • Analog 3.5mm TRS stereo input jack
  • Analog signal present LEDs
  • Buffered AES loop-thru output
  • Frequency Response:
    +/- .8 dB 20 Hz to 20 kHz (30 Ohm load)
    +/- .2 dB 20 Hz to 16 kHz (10 kOhm load)
  • THD+noise:
    < .05% 20 Hz to 20 kHz (30 Ohm load)
    < .004% 20 Hz to 20 kHz (10 kOhm load)
  • Input Impedance:
    100 kOhms AES
    10 kOhms analog
  • Headphone Impedance: 32 Ohms recommended
  • Power Requirements: 6 VDC @ 300mA (#PS6 included)
  • Short Circuit Protection: Withstands shorted output at full level indefinitely
  • Total Gain: 20 dB
  • Noise at Unity Gain: < -98 dBV
  • Maximum Output Level: +4 dBV
  • Maximum Input Level: +0 dBfs (5 Vpp) AES
    +3 dBV analog
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