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Listen AmpConnect621 User Manual

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PN: 8072 Rev 042622
AMPCONNECT 621 USER MANUAL
© COPYRIGHT 2020 - 2021 LISTEN, INC.

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Summary of Contents for Listen AmpConnect621

  • Page 1 PN: 8072 Rev 042622 AMPCONNECT 621 USER MANUAL © COPYRIGHT 2020 - 2021 LISTEN, INC.
  • Page 2 Rev 042622...

  • Page 3: Table Of Contents

    Listen Hardware Tab........
  • Page 4 Listen Software License Agreement ........

  • Page 5: Limited Warranty

    Limited Warranty LISTEN, Inc., a Massachusetts Corporation, having its principal place of business at 580 Harrison Ave, Suite 3W, Boston, MA 02118 (Manufacturer) warrants its AmpConnect 621 products (the Products) as follows: 1. Limited Warranty. Manufacturer warrants that the Products sold hereunder will be free from defects in material and workmanship for a period of one (1) year from the date of purchase.
  • Page 6 page intentionally left blank Limited Warranty AmpConnect 621 Manual ™...

  • Page 7: Product Overview

    Product Overview AmpConnect 621™ simplifies your multichannel audio test in a single USB-connected unit. With sample rates up to 192kHz, it is ideal for the measurement of high resolution audio devices. 6 inputs with independent control of microphone power for each channel ...

  • Page 8: Front Panel Indicators

    ATTENTION: RISQUE DE CHOC ÉLECTRIQUE – NE PAS OUFRIR AmpConnect 621™ CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. NO Listen, Inc. Made in U.S.A. USER-SERVICABLE PARTS INSIDE. Serial No. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

  • Page 9: Installation

    Installation Requirements SoundCheck 18.1 (or later) is required in order to control AmpConnect 621™ via USB  The SoundCheck computer must have an available USB 2.0 connection  Note: It is recommended that AmpConnect 621 be mounted in a ventilated rack mount enclosure for proper cooling.

  • Page 10: System Settings

    System Settings The following settings are recommended to prevent Windows system sounds from inadvertently playing through a device under test or artificial mouth. A transducer could be damaged by loud system sounds. Windows Audio Devices 1. Click Start and type “Manage Audio Devices” in 3.

  • Page 11: Test Connections And Procedures

    NE PAS OUFRIR AmpCon n ect 6 2 1 ™ CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK , DO NOT REMOVE COVER. NO Listen , Inc. Made in U .S.A . USER-SERVICABLE PARTS INSIDE . Serial No. Digital I /O REFE R SERVICING TO QUALIFIED SERVICE PERSONNEL USB 2.0...

  • Page 12: Single Loudspeaker Test

    ATTENTION: RISQUE DE CHOC ÉLECTRIQUE – NE PAS OUFRIR AmpConnect 621™ CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. NO Listen, Inc. Made in U.S.A. USER-SERVICABLE PARTS INSIDE. Serial No. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

  • Page 13: Two Loudspeaker Test

    ATTENTION: RISQUE DE CHOC ÉLECTRIQUE – NE PAS OUFRIR AmpConnect 621™ CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. NO Listen, Inc. Made in U.S.A. USER-SERVICABLE PARTS INSIDE. Serial No. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

  • Page 14: Microphone Test

    ATTENTION: RISQUE DE CHOC ÉLECTRIQUE – NE PAS OUFRIR AmpConnect 621™ CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. NO Listen, Inc. Made in U.S.A. USER-SERVICABLE PARTS INSIDE. Serial No. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

  • Page 15: Hardware And Calibration

    Click Refresh. The editor will update to show the serial  number of the new unit in the Device field as well as the new Vp values. The Listen Hardware Tab will also update and show that the new interface has replaced the old one.
  • Page 16 Hardware Editor The sample rate for AmpConnect 621 is set to 44.1kHz by default. Click on the drop-down arrow in the Default Sample Rate column and select from the available rates. This will update all input and output sample rate fields for the device. Figure 4-3: Hardware Editor - Audio Tab Latency - The Latency value for each sample rate is preset for AmpConnect 621.

  • Page 17: Latency Changes

    7. All channels, analog or digital, must have the same latency value per sample rate for that audio interface. This ensures the system will work correctly if they are used simultaneously in a sequence. Latency Changes Latency is the round trip time delay between input and output channels on a single audio interface when operating in full-duplex mode (record and play simultaneously).
  • Page 18 Default Latency Windows Default Latency in Samples for Typical Sample Rate and Buffer Values USB Connection 44.1 kHz 48 kHz 88.2k 96 kHz 176.4 kHz 192 kHz ASIO/USB Buffer 512 / Safe 512 / Safe 1024 / Safe 1024 / Safe 2048 / Safe 2048 / Safe Samples / ASIO...

  • Page 19: Ampconnect 621 Hardware Configuration

    AmpConnect 621 Hardware Configuration The Vp values for the AmpConnect 621 are factory-programmed, and are automatically loaded into the Hardware Editor when “Automatically create Signal Paths for Listen Devices” is turned on. See Plug and Play on page The Calibration Editor is also updated with the correct signal paths for the associated hardware. See...

  • Page 20: Listen Hardware Tab

    AmpConnect 621 is automatically recognized by SoundCheck according to serial number. Each device is added to the Listen Hardware page and automatically named. If simply exchanging one AmpConnect 621 for another, the Device ID remains AC621-1 and the Serial # field updates.

  • Page 21: Soundcheck Calibration Configuration

    SoundCheck Calibration Configuration Figure 4-13: System Calibration Figure 4-13 shows the Calibration Editor with the default Signal Paths used in SoundCheck. Direct In and Direct Out are always linked to their respective Hardware Channels and use Unity  Cal for the Calibrated device Mic In 1 through 6 are linked to their respective Hardware Channels and have individual DAT files ...

  • Page 22: Self Test Sequence

    Self Test Sequence After the Hardware and Calibration configurations are complete, you can run AmpConnect 621 Self Test.sqc to verify the performance of your AmpConnect 621. This sequence is located in: C:\SoundCheck x.x\Sequences\Calibration\ Figure 4-14: Self Test Results Results include: Frequency Response for Line In/Out and Amplifier ...

  • Page 23: Amplifier Calibration

    Amplifier Calibration The gain of AmpConnect 621 is fixed at 26.4 dB. The mono power amplifier in AmpConnect 621 can be calibrated in SoundCheck if you want to create the output correction curve for the amp and fine tune the Sensitivity value.

  • Page 24: Microphone Calibration

    Microphone Calibration If using one of Listen’s SCM reference microphones the Mic Bias for the selected channel must be set to SCM or if using an IEPE microphone IEPE must be selected in the Startup Default or in a Message step as shown in Figure 4-16.
  • Page 25 5. Place the acoustic calibrator on the reference microphone and click Calibrate to measure its sensitivity. If the Measured Sensitivity is outside the manufacturer’s  specifications, a flashing FAILED message will appear. Check your connections and make sure the calibrator is turned on before assuming something is wrong with the microphone.
  • Page 26 Page intentionally left blank AmpConnect 621 Manual Hardware and Calibration ™...

  • Page 27: Ampconnect 621 Message Step

    AmpConnect 621 Message Step The AmpConnect 621 Message Step and the Hardware Editor Startup Default settings are identical. All settings noted in this section can be applied to the settings mentioned in Startup Default on page SoundCheck controls the operation of AmpConnect 621 through Message Steps. SoundCheck automatically enables enable USB control as soon as AmpConnect 621 has been ...

  • Page 28: Outputs

    Input Muting Important! An input is Muted for 2 seconds when switching between Off and SCM / IEPE Bias. If a Message Step is used to change Bias settings during the run of a SoundCheck sequence, a “2 second Wait time” should be set in the Message Step to account for this.

  • Page 29: Usb Control Via Soundcheck

    Figure 6-1. Device ID - The user can select which AmpConnect 621 should be used if multiple AmpConnect 621s are on the system. Configure Listen Hardware - Opens the AmpConnect 621 settings window (see Figure 6-2) Figure 6-1: AmpConnect 621...
  • Page 30 If you need to switch from Max Gain to 0 or Minimum Gain we recommend that you use a Listen Hardware Message step with a 500 mSec Wait Time to allow for settling. Signal Routing - Outputs BNC Out 1 and 2 - Routes the Output of the internal audio interface ...

  • Page 31: Digital I/O Message Steps

    Microphone Bias “Wait Time” If you turn the microphone bias voltage on or off during the run of a sequence, you may need to set a “Wait” period before proceeding to an Acquisition Step. The microphone and mic input circuit may require 2 seconds (approx.) of settling time before continuing the run of the sequence.
  • Page 32 Page intentionally left blank USB Control Via SoundCheck AmpConnect 621 Manual ™...

  • Page 33: Digital I/O Operation

    Connection Connecting to the back panel Digital I/O requires a Phoenix plug, part  number: 1803659, in order to wire to external devices. (optional part, contact Listen, Inc.) Figure 7-1: Phoenix Connection Digital I/O Message 8 Bits of digital I/O that can be written and read directly in SoundCheck ...
  • Page 34 Direction: Read vs. Write Write (Output): The selected bit on the Digital I/O port  changes to a TTL “High state”. See Figure 7-3. Read (Input): The Digital I/O is expecting to read a state  change at the DIO input. A High bit means that the step expects the selected bit(s) to see a “High State”...
  • Page 35 Digital I/O Rules Digital I/O Message Steps can be set to Read (Input) or Write (Output)  Best practice: Use a Digital I/O Message Step at the top of a sequence to “initialize” the Bits to a  desired starting state Bits are at ground when set Low, Message Step switch Off ...

  • Page 36: Digital I/O Write Example

    Digital I/O Write Example Bit 0 - Write Digital I/O Port Bit 0 Bit 1 The physical Bit 0 line is wired to an LED and a  >1k Ohm Bit 2 series resistor as shown in Figure 7-5 Bit 3 Similarly, this can be connected to a solid state relay ...

  • Page 37: Digital I/O Read Examples

    Digital I/O Read Examples The Digital I/O input of AmpConnect 621 can read the state of external TTL voltage levels and switch closures in a SoundCheck test sequence. When set to Read (Input), the selected Bit(s) are pulled high through an internal 100K resistor. +3.3 VDC is present at all enabled Bit lines that are set High in the Message Step (switch on) ...
  • Page 38 Bit 4 Pulled Low - Normally Closed Switch Digital I/O Port Bit 0 This is similar to the previous example but shows how to deal Bit 1 with the difference between normally open and normally closed External Switch (Normally Closed) Bit 2 switches.
  • Page 39 TTL Input Example Digital I/O Port Bit 0 SoundCheck may also need to receive a TTL signal from Bit 1 an external device such as a Production Line Controller. Bit 2 Bit 3 Figure 7-14 shows the output of such a device ...
  • Page 40 Digital I/O Message Step Configuration The example sequence in Figure 7-17 shows the Message Step “Bit 4 High” is the first step in the sequence. This step is configured to Jump to itself if the verdict is “Fail”. If the verdict is “Pass”, the conditional branching is set to Jump to the next step in the sequence.

  • Page 41: Specifications

    Specifications Mic/Line Inputs Number of inputs 6 Mic/Line Inputs, BNC connectors, Unbalanced 20 Hz to 20 kHz: +0.1/-0.4 dB (all sample rates) Frequency Response 10 Hz to 90 kHz: +0.1/-1.1 dB (at 192 kHz sample rate) Gain -20, 0, +10, +20, +30 dB, +/- 0.25 dB typical -20 dB = 14.1 Vrms max 0 dB = 1.41 Vrms max Maximum input level according...
  • Page 42 Power Amplifier 20 Hz to 20 kHz ± 0.1 dB Frequency Response 10 Hz to 90 kHz +0.1, -1 dB 50 W RMS into 4 Ω Continuous Output Power 25 W RMS into 8 Ω -82 dB (0.008%) typical @ 1W, 8Ω, 44.1 kHz sample rate, 20 Hz to 20 kHz BW -76 dB (0.015%) typical @ 1W ,8Ω, 192 kHz sample rate, 10 Hz to 80 kHz BW THD+N -90 dB (0.003%) typical @ 25W, 8Ω, 44.1 kHz sample rate, 20 Hz to 20 kHz BW...

  • Page 43: Equipment Ratings And Approvals

    Equipment Ratings Normal Environmental Conditions AmpConnect may be used under the following environmental conditions: Indoor use only, Pollution Degree 2  Altitudes up to 2,000 m  Temperatures between 0 °C to 40 °C  Maximum relative humidity 80% for temperatures up to 31 °C decreasing linearly to 50% relative ...
  • Page 44 Fuse Replacement The fuse is contained in the IEC power input module on the back panel of AmpConnect 621. The power cord must be removed in order to replace the fuse  Use a flat blade screwdriver under the lip of the ...
  • Page 45 After replacing the fuses, insert the fuse block into  the power entry module with the electrical contacts facing into the housing as shown in Figure 9-4. Push it in until it is flush with the surface of the power entry module. Close the fuse holder door until it clicks.

  • Page 46: Ce Declaration Of Conformity

    CE Declaration of Conformity Equipment Ratings and Approvals AmpConnect 621 Manual ™...
  • Page 47 UK Declaration of Conformity AmpConnect 621 Manual Equipment Ratings and Approvals ™...
  • Page 48 Page intentionally left blank Equipment Ratings and Approvals AmpConnect 621 Manual ™...

  • Page 49: Important Safety Precautions And Symbol Explanations

    11. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. 12. Use only attachments/accessories specified by Listen, Inc. 13. Use only with hardware, brackets, stands, and components sold with the apparatus or by Listen, Inc.
  • Page 50 Safety Symbols The exclamation point triangle is used to indicate that caution is necessary when operating the device or control close to where the symbol is placed, or to indicate that the current situation needs operator awareness or operator action in order to avoid undesirable consequences. This alerts the user to the presence of important operating and maintenance (servicing) instructions in the this manual.

  • Page 51: Vigtige Sikkerhedsforskrifter Og Symbolforklaringer

    11. Beskyt netledningen mod at blive trådt på eller klemt, specielt ved stik, stikdåser og det punkt, hvor ledningen føres ud af enheden. 12. Brug kun tilslutninger/tilbehør som angivet af Listen, Inc. 13. Brug kun hardware, beslag, stande og komponenter som sælges sammen med enheden eller ved Listen, Inc.
  • Page 52 Sikkerhedssymboler Trekanten med udråbstegnet bruges til at angive, at forsigtighed er nødvendig ved brug af enheden eller kontrol tæt på hvor symbolet er placeret, eller for at angive at den nuværende situation kræver opmærksomhed af operatøren eller en operatørhandling for at undgå uønskede konsekvenser.

  • Page 53: Explications Importantes Des Symboles Et Des Précautions De Sécurité

    à l'endroit où ces dernières sortent de l'appareil. 12. Utilisez seulement des accessoires spécifiés par Listen, Inc. 13. Utilisez seulement avec du matériel, des supports et des composants vendus avec l'appareil ou par Listen, Inc.
  • Page 54 Symboles de sécurité Le triangle du point d'exclamation est utilisé pour indiquer qu'une précaution est nécessaire lors de l'utilisation de l'appareil ou de la télécommande près de l'endroit où se trouve le symbole, ou pour indiquer que la situation actuelle demande une présence d'esprit de l'opérateur ou un geste de l'opérateur afin d'éviter des conséquences non-désirées.

  • Page 55: Wichtige Sicherheitsvorkehrungen Und Symbol-Erklärungen

    Dies gilt besonders für die Bereiche am Stecker, an den Anschlussbuchsen und an den Stellen, an denen das Kabel aus dem Gerät herausgeführt wird. 12. Verwenden Sie nur Zubehör/Zusatzgeräte, die von Listen Inc. für diesen Zweck zugelassen wurden.
  • Page 56 Sicherheitssymbole Das Ausrufezeichensymbol wird immer dann dargestellt und in der Nähe der Stelle angezeigt, an der besondere Vorsicht beim Betrieb oder bei der Steuerung des Gerätes erforderlich ist. Es wird auch angezeigt, wenn die besondere Aufmerksamkeit oder der Eingriff des Nutzers erforderlich ist um ungewünschte Konsequenzen zu vermeiden.

  • Page 57: Información De Seguridad Y Símbolos

    12. Use solo aditamentos y accesorios especificados por Listen, Inc. 13. Use solo herramientas, soportes, plataformas y componentes vendidos junto con el aparato o vendidos por Listen, Inc.
  • Page 58 Símbolos de seguridad El triángulo con el signo de exclamación se usa para indicar que se debe ser cuidadoso al ope- rar el dispositivo o control cerca de donde se ubica el símbolo, o para indicar que la situación actual re-quiere del conocimiento o la acción del operador para evitar consecuencias no deseadas.

  • Page 59: Listen Software License Agreement

    End-User’s computer, computer system, or at End-User’s place of business. End-User agrees to only install and use authorized, genuine and licensed versions of the Software. Installation or use of any unlicensed or illegal copies, or software based on Listen’s source code shall be deemed a material breach of this Agreement.
  • Page 60 U.S. Export Administration Act and its associated regulations, and may be subject to export or import regulations of other countries. End-User agrees to strictly comply with all such regulations and acknowl- edges that it has the responsibility to obtain licenses to export, re-export or import Software. AmpConnect 621 Manual Listen Software License Agreement ™...
  • Page 61 END-USER ACKNOWLEDGES THAT IT HAS READ THIS LICENSE, UNDERSTANDS IT, AND AGREES TO BE BOUND BY ITS TERMS AND CONDITIONS. Should you have any questions concerning this License, contact Licensor at the address set forth above. AmpConnect 621 Manual Listen Software License Agreement ™...
  • Page 62 AmpConnect 621 Manual Listen Software License Agreement ™...
  • Page 63 LISTEN, Inc. 580 Harrison Ave., Suite 3W, Boston, MA 02118 AmpConnect 621 Manual Listen Software License Agreement ™...
  • Page 64 AmpConnect 621 Manual Listen Software License Agreement ™...

  • Page 65: Index

    INDEX Test Connections and Procedures ........5 .................33 TTL Input ............17 Amplifier Calibration ..........4 Audio Devices - Windows 7 .......... 4 Audio Devices - Windows XP ..............30 Bit set to Write Calibration ............... 19 ..........15 Calibration Configuration .............
  • Page 66 page intentionally left blank INDEX AmpConnect 621 Manual ™...
  • Page 67 Technical Support - support@listeninc.com Listen Website: www.listeninc.com/ © COPYRIGHT 2020 - 2021 LISTEN, INC. All rights reserved. ® SoundCheck , HarmonicTrak™, STWEEP™, SoundMap™, NoiseCheck™, SoundConnect™, DC Connect™, AmpConnect™, AmpConnect 621™, AmpConnect ISC™, SC Amp™, SoundConnect 2™, AudioConnect™ and AudioConnect 4x4™ are trademarks of Listen, Inc.

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