ATI Audio AMM200 - Manual (Page 3)

ATI Audio Inc. Tel: 856-719-9900 [email protected] www. audio.com
HEADPHONE OUTPUTS
A high compliance stereo headphone driver (U9, U10) is controlled by the front panel
PHONES volume control. The headphone amplifier will drive up to 20Vp-p into high
impedance headphones and up to 120mAp-p into low impedance headphones. The
headphone output will provide a comfortable listening level of 1mW at 12 o’clock on the
volume control for most headsets. The amplifier is capable of driving many headsets up
to DANGEROUS LEVELS over 120dB SPL. If you can hear distortion, it’s TOO LOUD
and can cause PERMANENT HEARING DAMAGE! The AMM200 is designed to drive
TRS (Tip-Ring-Sleeve) connected stereo headphones between 32 and 600 ohms
impedance. Do not use TS connected mono headphones. Rear panel RCA type jacks can
route the headphone signals to external self-powered loudspeakers. The external speakers
are switched off when headphones are plugged into the front headphone jack.
METERING
The AMM200 allows front panel selection of input or output metering and also selection
of peak or average display ballistics. The INPUT mode measures the normalized output
of the input instrumentation amplifier and is calibrated (internal adjustments M2L, M2R)
to indicate 0dB at inputs of +4dBu, -10dBu or –20dBu input as selected by jumper J9.
The OUTPUT mode meters the audio line output and is calibrated to read 0dB at +4dBu
line output level with internal calibration adjustments M1L and M1R. The meter scale
measures 12dB above and 15dB below the 0dB point in ten 3dB steps.
The ballistics of the meter displays are designed to closely follow the requirements of
DIN45406 for PPM response in the PEAK mode and to approximate a VU meter in the
AVERAGE mode.
POWER
The AMM200 operates from an external 24VDC power module and draws up to 0.2 amp.
Loop-thru DC connectors allow you to operate multiple AMM200 units from a single
power module. Allow one power module for every two AMM200 products. Use power
modules WA100-1 for 120VAC (supplied as standard) or WA100-2 for 230VAC and DC
power cable loop-thru 20602-1. A front panel POWER switch and Red LED indicator
are provided.
SIZE AND RACK MOUNTING
1.72” (4.45cm) H X 5.75” (14.6cm) W X 6.0” (15.2cm) D; 1.5 lbs (0.7kg) net weight, 3
lbs (1.4kg) shipping weight. AMM200 units can be mounted up to three across in one
vertical 1-3/4” rack space using accessory rack mount kits. Stacking and angled desk
mount kits and field carry bags with battery packs are also available.