ClearOne Converge Pro 840T | 4 Channel AEC Microphone Mixer Amplifier Hybrid 910-151-840

SKU: CLO-INTRFCE-910151840 Category:
Brand: ClearOne


Telephone Interface

Professional conferencing system – Complete, digital matrix mixer conferencing solution with built-in telephone interface and speaker amplifier

Ideal for collaboration, presentation and distance communications, the CONVERGE Pro 840T capitalizes on ClearOne’s legacy audio technology with proven HDConferenceTM audio processing for unmatched sound and the most natural audio conferencing experience possible.

Four built-in mic inputs, enterprise-telephone interface, speaker amplifier for standalone applications, enhanced management features and simplified configuration make 840T the perfect expandable solution for virtually any venue or application.

Key Features

  • Full-bandwidth Acoustical Echo Cancellation (AEC) keeps audio clear of reverberations
  • Improved duplex performance to create the most natural interaction
  • Next-generation noise cancellation with adaptive modeling matches rooms ambient noise
  • Increased resolution on Microphone Preamp stage provides fine tuning 0-56 dB in 7 dB increments
  • D.A.R.E (Dynamic Automatic Resonance Elimination) completely controls feedback
  • Next-generation Distributed Echo Cancellation on every mic input
  • First-mic priority delivers clear audio to the far end
  • 20 Hz-22 kHz bandwidth for full-range audio response
  • Automatic Gain and Level controls maintain balanced and consistent audio clarity
  • Scalable by linking multiple units for extensive mic coverage and up to 16 phone lines
  • Ten mic gating groups (four internal & six global) allow separation of mics into individual mixer gating groups for greater configuration flexibility
  • No space required between rack mounted units
  • 32 presets can be executed on-the-fly without disturbing other ongoing preset operations
  • SNMP and HTML remote management give IT professionals flexible options for access
  • Event scheduler and diagnostic console for automation of updates and simplified maintenance
  • Built-in telephone interface and 10W power amplifier
  • Integrated Ethernet and USB connections
  • Link multiple CONVERGE/CONVERGE Pro units (CONVERGE Pro 880, 880TA, 8i, TH20, CONVERGE SR 1212 and SR 1212A) for extensive microphone coverage and up to 16 phone lines
  • Enhanced expansion bus, featuring 18 mix-minus audio buses for routing between units
  • 255 Macros for customized audio control/configuration with single command execution
  • Drag & drop A/V and channel objects
  • Selectable views-unit, matrix, channel

Technical Specifications

Audio Performance
Conditions: Unless otherwise specified, all measurements are performed with a 20 Hz to 22 kHz BW limit (no weighting)
Frequency Response: 20 Hz to 22 kHz ±1dB
Noise (EIN): -126 dBu, 20 kHz BW, max gain, Rs=150 ohm
THD+N: <0.02%
Dynamic Range: 100 dB (non A-weighted)
Crosstalk <-91 dB re 20 dBu @ 20 kHz channel to channel
Auto Mixer Parameters
Number of Open Microphones (NOM)
PA Adaptive Mode
First Mic Priority Mode
Last Mic Mode
Maximum # of Mics Mode
Ambient Level
Gate Threshold Adjust
Off Attenuation Adjust
Hold Time
Decay Rate
Matrix Mixing Parameters
29×30 matrix
8 analog in/out
1 speaker out (amplified)
12 expansion bus in/out
4 assignable processing blocks in/out
4 assignable fader blocks in/out
1 telco in/out
Assignable Processing Blocks
All pass
Low pass
High pass
Low shelving
High shelving
Parametric EQ
CD Horn
Delay; adjustable up to 250 ms
Assignable Fader Blocks
Microphone Input Configuration
Input Gain Adjust
Mic or Line Level
Phantom Power on/off
Echo Cancellation on/off
Noise Cancellation on/off
All Pass
Low Pass
High Pass
Mute on/off
Chairman Override on/off
AGC on/off
Automatic Level Control on/off
Auto Gate/Manual gate
Adaptive Ambient on/off
Pre AEC channel
Mic/Line Inputs 1-4
Push-on mini-terminal block, balanced, bridging
Impedance: < 10 K ohm
Nominal Level: adjustable -56 dBu to 0 dBu (7 dB step coarse gain adjustment)
Maximum Level: -65 dBu to +20 dBu
Echo Cancellation: 130 ms tail time (works with 12 dB of room gain)
Noise Cancellation: 6??15 dB attenuation
Phantom Power: 24 V, selectable
Line Inputs 5-8
Push-on mini-terminal block, balanced, bridging
Impedance: > 5 K ohm
Nominal Level: 0 dBu
Maximum Level: 20 dBu
Outputs 1-8
Push-on mini-terminal block, balanced
Impedance: < 50 ohm
Nominal Level: 0 dBu
Maximum Level: 20 dBu
Amplifier Output
Binding post connection
10 Watts @ 4 ohm Impedance
THD + Noise: <0.5%
Telco Line
POTS (plain old telephone service) or analog extension from a PBX
A-lead supervision provided
Telco Set
POTS (plain old telephone service) or analog extension from a PBX
A-lead supervision provided
Telephone Audio Performance
Conditions: Unless otherwise specified, all measurements are performed with
Transmit Limiter and Receive ALC disabled
Frequency Response: 250 Hz to 3.3 kHz ±1 dB
THD+N: <0.3%, re-max level 250 Hz to 3.3 kHz
SNR: >62 dB re max level
Telephone Echo Cancellation
Tail Time: 31 ms
Null: 55 dB nominal
Telephone Noise Cancellation
Noise Cancellation: 6??15 dB attenuation
Expansion Bus In/Out
Proprietary Network
RJ-45 (2), 1.9 Mbps
Category 5 twisted-pair cable, 200’ maximum cable length between any two Converge Pro devices
Autoswitching with Quality of Connection (QoC)
10/100 Ethernet Network Port
10/100 Ethernet PC Port
RJ-45 Connectors
Serial Command Protocol Only (Console software not supported on RS-232 port)
DB-9 female
9,600/19,200/38,400/57,600/115,200 baud rate;
8 bits, 1 stop, no parity
Hardware flow control on (default)/off
Version 2.0 Compatible
Type: B-connector
DB-25 female A/B (2)
Inputs A/B: active low (pull to ground)
Outputs A/B: open collector, 40 VDC max, 40 mA each
+3.3 VDC pins (2) (300 mA over-current protected)
Configuration & Administration Software
Convergetm Console
Power Input Range
100??240 VAC; 50/60 Hz
Power Consumption
30W Typical
Dimensions (L x D x H)
17.25 x 10.25 x 1.75 inches
43.8 x 26 x 4.5 cm
7.5 lbs/3.3375 kg unit weight
12 lbs/5.4kg shipping weight
Operating Temperature
14 deg F/-10 deg C to 122 deg F/50 deg C ambient room temperature

SKU: CLO-INTRFCE-910151840 Category:

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