ATI Audio HDA400 User Manual

Page 3

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Use only TRS output plugs and stereo headphones. The use of TS plugs on
mono headphones shorts one headphone output to ground. Although this will not
damage the HDA400, it will load down the power supply and reduce maximum
output levels to the other output channels. Output TRS plugs should all be wired
left to TIP, Right to RING and common to SHIELD.

CAUTION

The HDA400 provides a comfortable listening level of 1mW at around 12 o’clock
on the volume control for most headsets. The HDA400 is capable of driving many
headsets to DANGEROUS LEVELS over 120dB SPL. If you can hear distortion,
it’s TOO LOUD! Levels near 120dB SPL can easily cause PERMANENT
HEARING DAMAGE, BE CAREFUL! Treat your ears with tender loving care and
they will follow you anywhere.

PERFORMANCE SPECIFICATIONS

OUTPUTS:

Four high compliance 6V/80mA stereo drivers capable of
over 100mW into 32 to 600 ohm stereo headphones

DYNAMIC RANGE: 110dB Typical at output into 600-ohm headphones

DISTORTION:

.10% THD maximum, 20-20000 Hz, below clipping

RESPONSE:

+0/-.5dB, 20-20000 Hz

GAIN:

26dB maximum

NOISE:

-90dBu E.I.N., 20 – 20000 Hz

SEPARATION:

70dB minimum at 1kHz

INPUTS:

Stereo, 20K balanced, bridging, -10/+4dBu nominal

INDICATORS:

INPUT CLIP - onset of input stage clipping, Yellow LED

POWER – monitors internal DC voltage - Red LED

POWER:

115/230VAC, 50/60Hz, 24VA, and IEC320 3 pin connector

SIZE:

1RU package; 19” (48.3cm) W x 1 ¾” (4.5cm) H x 7.5”
(19.05cm) D 15lbs (6Kg)