Gentner AP400 Specifications

AUDIO PERFECT™ AUDIOCONFERENCING SYSTEM

AP400

PRODUCT OVERVIEW

The Audio Perfect™ 400 (AP400) pro­vides the highest possible audio quality
available for a variety of conferencing
applications.The AP400 takes audio to
the next level with Gentner’s proprietary
Distributed Echo Cancellation™ technol­ogy, which enhances the audio quality in
any conferencing application by placing
an echo canceller and an audio processor
on every microphone input.This technolo­gy is vastly superior to traditional sys­tem-wide echo cancellation, because it
eliminates the gating and audio process­ing issues that often hamper such sys­tems.The result is highly reliable, clear,
transparent audio for use in the most
demanding acoustical environments.

The AP400 features an integrated tele­phone interface,which enables telephone
participants of an audio or videoconference
to sound as if they were actually in the
same room.The AP400 also has an inter­nal power amplifier for easy installation of
a loudspeaker. In addition, the AP400 per­forms automatic gating of microphones,

microphone mixing, audio processing and
matrix routing—all in a one-rack-mount­able unit that seamlessly integrates the
functions of each component.

The AP400 provides extreme flexibility
for your applications. Each unit has four
mic/line inputs, four pre-configured line­level inputs (for CODECs,VCRs, CD
players, etc.), and eight programmable
outputs (programmable meaning config­ured with any input or combination of
inputs). Each of the mic/line inputs and
line-level inputs uses automatic gain con­trol to compensate for loud or soft talk­ers.The mic/line inputs also offer chan­nelized equalization for continuous cut or
boost, as well as high-pass filtering to
reduce unwanted low frequency noise.

For conference applications where you
need more microphone coverage,
AP400’s and AP800’s can be combined
for up to 64 total microphones.When
multiple telephone lines are needed, up
to 16 AP10 units can also be added. All

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units are G-Linked together using
Gentner’s high-speed digital network bus,
and can be controlled and diagnosed via
a single RS232 connection.

So relax! Whether your room is small,
medium or large, Gentner’s Audio
Perfect products will handle your most
demanding acoustic environments and
routing configurations!

APPLICATIONS

Distance Learning
Teletraining
Telemedicine
Courtrooms
Conference Rooms
Boardrooms
Hotels

Easy to install—simple to operate
Distributed Echo Cancellation™ tech-

nology on each mic/line input dramat­ically improves overall system perfor­mance, flexibility and setup

"Plug and play" capability for easy
design, programming, installation and
maintenance—no white noise set-up

Automatic microphone gating
reduces background noise and
reverberation, resulting in crystal­clear, transparent audio

Simultaneous two-wire/four-wire
capability enables video and telephone
participants to communicate simulta-

neously with full-duplex audio
Truly linkable,the AP400 can be

expanded (via the G-Link) to accommo­date applications requiring up to 64
microphones—all system parameters
are linked and function as one system

Each of the eight inputs incorporate
automatic gain control to compensate
for loud or soft talkers, while the four
mic/line inputs offer channelized
equalization for continuous cut or
boost and high-pass filtering to reduce
unwanted frequency noise

Programmable matrix allows for sim­ple system customization for a wide
variety of applications and individual

FEATURES/BENEFITS

AP400

AUDIO PERFECT™ AUDIOCONFERENCING SYSTEM

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customer requirements
On-the-fly configuration changes. Six

customizable preset programs can be
accessed from a remote control,
switch or front panel

Integrated touch-tone dialing for easy
dialing through remote control

Gentner’s Digital Signal Processing tech­nology ensures crystal-clear audio with
the deepest, most reliable hybrid null

Selectable auto-answer and auto-dis­connect enables integrators to choose
auto-disconnect without auto-answer
and vice versa

Optional remote control
Worldwide compliance—includes

FCC, CSA and CE
All this in a one-rack-mountable unit

4

wire2wire

Distributed

Echo

Cancelation

speaker

output

automatic
mic mixer

line

inputs

mic

inputs

integrated

8x8 Router

Gentner AP400 Yes 4 Yes 4 Yes Yes Yes 5 watt

Biamp Voicecrafter 3000 No 2 No-mics are always on 1 No Yes No 5 watt

Biamp Voicecrafter 3010 No 2 No-mics are always on 1 No Yes Yes 5 watt

Sound Control AVT-24 No 0 No 1 No Yes Yes 0

Sound Control AVT-44 No 4 No-mics are always on 1 No Yes Yes 10 watt

Product

SPECIFICATIONS

DIMENSIONS (L x W x H)

17" x 1.75" x 8"

43.2cm x 4.5cm x 25.4cm

WEIGHT

7 lbs./3.18 kg dry
12 lbs./5.4 kg shipping

POWER

Auto-adjusting power module; 100­240Vac; 50/60Hz; 30W

RS232

DB9 female, 9,600/19,200/38,400
(bps) baud
selectable

CONTROL/STATUS

DB25 female; (2) +5Vdc pins, 100mA
each (8) open collector status outputs,
20Vmax, 40mA each (8) input activa­tion selectable; momentary or latching
ground

SPEAKER OUTPUT

Binding Post 5W max into 4 Ohm

G-LINK IN

RS485; 38.4kbps; 110kOhm imped­ance, category-five twisted pair cable;
20-foot limit between networked units

G-LINK OUT

RS485; 38.4kbps; 110kOhm imped­ance, category-five twisted pair cable;
20-foot limit between networked units

TELCO LINE

RJ11 connector—POTS (Plain Old
Telephone Service) line or analog exten­sion from PBX

TELCO SET: RJ11 connector—analog

telephone set

MIC/LINE INPUTS

Connector: Removable Phoenix

®

block
connector, -55 or 0dBu nominal,
adjustable, balanced, bridging

Impedance: 4kOhms
Frequency Response: 20Hz to

15kHz ±2dB
Phantom Power: 24Vdc input, selec-

table
NOISE: EIN 20Hz to 15kHz – 125dBu
THD: <.03%*

LINE-LEVEL INPUTS

Connector: Removable Phoenix

®

block
connector, 0dBu nominal, adjustable,
balanced bridging

Impedance: 20kOhms
Frequency Response: 20Hz to

15kHz ±2dB
SNR: >85dB*
THD: <.01%*

LINE OUTPUTS

Connector: Removable Phoenix

®

block
connector, 0dBu nominal, adjustable,
balanced bridging

Impedance: 50 Ohms (designed to drive
>600 ohm inputs)

Frequency Response: 20Hz to
15kHz ±2dB

SNR: >85dB*
THD: <.01%*

TELCO AUDIO PERFORMANCE

Frequency Response: ±2dB from 250Hz
to 3.3kHz (with AGC disabled)

SNR: >60dB (reference at –15dBm
on/off the telephone line)

THD: <2%, 250Hx to 3.3kHz (ACG
disabled) (referenced at –15dBm on/off
the telephone line)

Pre Emphasis: +4dB at 2kHz

ECHO CANCELLATION TAIL TIME

>120 milliseconds, each gated input

TELCO CANCELLATION TAIL TIME

31 milliseconds

OPERATING TEMPERATURE

0°-50° C, 32° - 122° F

* All SNR and THD measurements are

referenced to maximum output level
with a band-pass of 20Hz to 20kHz
unless otherwise specified.

AP400

AUDIO PERFECT™ AUDIOCONFERENCING SYSTEM

ACA

APPROVED

APPROVED

Specifications are subject to change without notice.

AUDIO PERFECT™ AUDIOCONFERENCING SYSTEM

AP400

Gentner Communications Corporation
1825 Research Way
Salt Lake City, UT 84119 USA

1.800.945.7730

1.801.975.7200

Fax: [phone]
www.gentner.com

Try Gentner Conference CallSM—dial:

1.800.538.7633

©1998 Gentner Communications Corporation. Printed in USA, 11/98. Features, specifications, and descriptions are
accurate as of this printing. Gentner reserves the right to modify this information without prior notice or obligation.

Perfect Communication through Technology, Service, and Education.

TM

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Typical AP400 installation:

Mic 1 Mic 2 Mic 3 Mic 4

VCR

VOLUME

AMX / Crestron
Remote Control

Network

System

Outputs

MuteMute

Routing

1
1

2

Mic On

3
4

Telephone

Line

Telephone

Set

Inputs

Mute

Mute

+12

+8
+4

Enter

0

Esc

Meter

-4

-10

-30