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ATI Audio Inc.
Tel: 856-719-9900
sales@atiaudio.com
www.
audio.com
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AMM200
ANALOG AUDIO PREAMPLIFIER,
METER and MONITOR
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OPERATING AND MAINTENANCE MANUAL
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© Copyright 2011, ATI Audio Inc.
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ATI Audio Inc.
Tel: 856-719-9900
sales@atiaudio.com
www.
audio.com
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DESCRIPTION
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The AMM200 Analog Audio Preamplifier, Meter and Monitor is a full-featured stereo
line amplifier and monitor with balanced/unbalanced bridging XLR line inputs and
amplified servo-balanced/unbalanced line outputs plus stereo headphone drivers and a
stereo LED meter. The bright two-color LED meter is switchable to measure either the
line input or line output levels. Ballistics are selectable for either peak or average meter
response. The meter covers a wide dynamic range of –15 to +12dB in ten 3dB steps.
Switched rear panel RCA jacks allow external self-powered speakers to be controlled
from the headphone drivers.
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The AMM200 can be used free-standing, desk mounted or rack mounted up to three
across in one rack unit (1-3/4”). Optional field cases, protection plates and battery power
packs are available (see Field Accessories).
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PERFORMANCE
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The AMM200 provides dynamic range in excess of 114dB and THD below 0.1%
measured at the analog line and headphone outputs for all levels below clipping. All
measurements are noise limited at –90dB EIN (20Hz to 20kHz bandwidth). Frequency
response is +0 / -.25dB, 20Hz to 20kHz.
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LINE INPUTS
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The AMM200 accepts balanced or unbalanced stereo audio signals from XLR female
connectors. Nominal input levels at –20dBu (.07Vrms), -10dBu (.25Vrms) or +4dBu
(1.23Vrms) can be selected by moving internal jumper plug J9 to the desired position.
20Kohm balanced instrumentation amplifier inputs accept input levels up to +22dBu.
Higher inputs result in clean clipping with no phase reversal.
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LINE OUTPUTS
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Analog line level outputs for balanced or unbalanced audio lines of 600 ohms or greater
impedance are available on rear XLR type connectors. Ground sensing output drivers
(U7, U8) allow either the HI or LO output lines to be grounded for connection to
unbalanced loads. Grounding one side of an output pair shuts off drive to the grounded
line and doubles the output signal on the ungrounded side, thus maintaining normal
circuit operation and gain. Front panel trimpots set the nominal line output level to
+4dBu (1.25V) at 0dB on the line output meter, which allows 18dB headroom up to the
peak output level of +22dBu. Up to 43dB of gain is available from line input to output.
Frequency response is flat within .25dB from 20Hz to 20kHz and THD is well below
0.1% over the same frequency range at any output level below clipping. Output noise is
below –90dBu at unity gain.
Page 3
ATI Audio Inc.
Tel: 856-719-9900
sales@atiaudio.com
www.
audio.com
!
HEADPHONE OUTPUTS
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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.
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METERING
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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.
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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.
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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.
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POWER
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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.
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SIZE AND RACK MOUNTING
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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.
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ATI Audio Inc.
Tel: 856-719-9900
sales@atiaudio.com
www.
audio.com
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POWER SUPPLIES & LOOP-THRU CABLE
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The AMM200 is supplied with an external 24VDC power supply, as follows:
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WA100-1 Wall mount power supply (UL, CSA), 24VDC at .4A output,
115VAC/60Hz, and 16VA input, supplied as standard
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WA100-2 Wall mount power supply for international use, interchangeable AC
connectors, 24VDC at .4A out, 90-264VAC, 47-63Hz, 16VA input, optional
at extra cost
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20602-1 Loop-thru DC interconnect cable, 13” (33cm) long
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DESK MOUNT KITS:
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20617-501 Angled desk mount base for one unit
20617-502 Angled desk mount base and stacker for two units
20617-503 Angled desk mount base and stackers for three units
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RACK MOUNT SYSTEM:
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21075-501 Mounts three units in a single 19” 1RU rack space
20197-501 1/3 Rack Filler Panel
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FIELD ACCESSORIES
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PROK-1 Protection kit consists of a set of rugged side plates, which protect the front
panel controls and rear connectors from impact damage. Side plates also
allow attachment of a carry strap (not included). Slide brackets mount
PPA-1, DCA100-1 or BBU100-1 field power modules and allow quick
interchange.
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ABAG-1 Carry case with shoulder strap houses AMM200 plus assorted power
modules. Attaches to PROK-1 protection plates (included). Allows easy
access to battery modules.
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ATI Audio Inc.
Tel: 856-719-9900
sales@atiaudio.com
www.
audio.com
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One Year Limited Warranty
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ATI warrants this product to be free from defects in materials and workmanship to its original
owner for a period of one year from date of purchase. ATI will repair or replace such product or
part thereof, which upon inspection by ATI, is found to be defective in materials or workmanship.
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The Proper Return Authorization Number must be obtained from ATI in advance of return.
Contact ATI at 856-626-3480 or email sales@atiaudio.com to receive the number and
instructions for return of your unit.
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A written statement providing the name, address, daytime telephone number and email address
of the original owner, together with receipt from the original purchase, and a brief description of
any claimed defects, must accompany all returns. Parts or product for which replacement is made
shall become the property of ATI.
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The customer shall be responsible for costs of transportation and insurance to the factory of ATI,
and shall be required to prepay such costs.
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ATI shall use reasonable efforts to repair or replace any product covered by this limited warranty
within thirty days of receipt. In the event repair or replacement shall require more than thirty days,
ATI shall notify the customer accordingly. ATI reserves the right to replace any product that has
been discontinued from its product line with a new product of comparable value and function.
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This warranty shall be void in the event a covered product has been damaged, or failure is
caused by or attributable to acts of God, abuse, accident, misuse, improper or abnormal usage,
failure to follow instructions, improper installation or maintenance, alteration, or lightning, power
fluctuations and other incidental or environmental conditions. Further, product malfunction or
deterioration due to normal wear is not covered by this warranty.
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ATI DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF
MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE, EXCEPT AS EXPRESSLY SET
FORTH HEREIN. THE SOLE OBLIGATION OF ATI UNDER THIS LIMITED WARRANTY SHALL
BE TO REPAIR OR REPLACE THE COVERED PRODUCT, IN ACCORDANCE WITH THE
TERMS SET FORTH HEREIN. ATI EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL,
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM
BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO USE ANY
ATI PRODUCT.
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Some states do not allow the exclusion or limitation of incidental or consequential damages or
limitation on how long an implied warranty lasts, so the above limitations and exclusions may not
apply to you.
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This warranty gives you specific legal rights, and you may also have other rights that vary from
state to state.
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ATI reserves the right to modify or discontinue, without prior notice to you, any model or style
product.
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If warranty problems arise, or if you need assistance in using your product contact us.
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