GefenTV GTV-VOLCONT-DA User Manual

2.1 audio amplifier w/ volume stabilizer

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2.1 Audio Amplifier

w/ Volume Stabilizer

GTV-VOLCONT-DA

User Manual

gefentv.com

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Page 1 2.1 Audio Amplifier w/ Volume Stabilizer GTV-VOLCONT-DA User Manual gefentv.com...
Page 3 Write To: Gefen LLC c/o Customer Service 20600 Nordhoff St Chatsworth, CA 91311 www.gefentv.com support@gefentv.com Notice Gefen LLC reserves the right to make changes in the hardware, packaging and any accompanying documentation without prior written notice. For the latest firmware updates for this product, please visit Gefen’s download Web page at http://www.gefen.com/kvm/support/download.jsp...
Page 4: Table Of Contents
CONTENTS Introduction Operation Notes Features Front Panel Layout Front Panel Descriptions Back Panel Layout Back Panel Descriptions IR Remote Control Layout and Descriptions Installing the Battery Setting the IR Channel 11 Connection the 2.1 Audio Amplifi er w/ Volume Stabilizer Wiring Diagram 12 Operating the 2.1 Audio Amplifi er w/ Volume Stabilizer Status Screen...
Page 5: Introduction
Stabilizer. Your complete satisfaction is very important to us. GefenTV GefenTV is a unique product line catering to the growing needs for innovative home theater solutions. We specialize in total integration for your home theater, while also focusing on going above and beyond customer expectations to ensure you get the most from your hardware.
Page 6: Operation Notes
(such as movies and classical symphony concerts). Bypass Mode disables the Dolby Volume Stabilizer. • The remote can be used to control the GefenTV 2.1 Audio Amplifier w/ Volume Stabilizer from a comfortable distance. • This unit supports the following conversions: Analog to Analog (two-channel stereo to two-channel stereo).
Page 7: Features
RS-232 port for home automation control • IR remote control and front panel controls Package Includes (1) GefenTV 2.1 Audio Amplifier w/ Volume Stabilizer (1) Analog Audio L/R RCA cable (1) IR Remote Control Unit (1) 24 V DC Power Adapter...
Page 8: Front Panel Layout
FRONT PANEL LAYOUT...
Page 9: Front Panel Descriptions
FRONT PANEL DESCRIPTIONS Main LCD Display This display will show pertinent status information and will be used to make adjustments to features in the Menu System. Left Cursor Button This button is used to navigate the Menu System and change settings by moving the cursor to the left.
Page 10: Back Panel Layout
BACK PANEL LAYOUT...
Page 11: Back Panel Descriptions
BACK PANEL DESCRIPTIONS RS-232 Serial Port This port is used for serial communication using an RS-232 control device. Access to certain features are only available through the RS-232 interface. Analog L/R (RCA) Input Connect an RCA L/R stereo pair from the source to these two ports. Optical (TOSLINK) Input Connect an Optical cable from the source to this port.
Page 12: Ir Remote Control
IR REMOTE CONTROL LAYOUT Activity Indicator This LED will be activated momentarily each time a button is pressed. Power Off Turns off the unit. Power On Switches to the optical (TOSLINK) audio input. Bypass On Disables Dolby Volume control. Bypass Off Enables Dolby Volume control.
Page 13 IR REMOTE CONTROL LAYOUT Optical Switches to the optical (TOSLINK) audio input. Coax Switches to the coax (S/PDIF) audio input. 10 L/R Switches to the analog L/R RCA audio input. 11 Mute Off Disables the volume muting. 12 Mute On Enables the volume muting.
Page 14: Installing The Battery
INSTALLING THE IR REMOTE CONTROL Installing the Battery Remove the battery cover on the back of the IR Remote Control Unit. Insert the included battery into the open battery slot. The positive (+) side of the battery should be facing up. Replace the battery cover.
Page 15: Setting The Ir Channel
IR REMOTE CONTROL CONFIGURATION Setting the IR Channel on the IR Remote Control In the event that IR commands from other remote controls interfere with the supplied IR Remote Control unit, changing the IR Remote Control’s IR channel will fix the problem. The IR Remote Control unit has a bank of DIP switches used for setting the IR channel.
Page 16: Wiring Diagram
Stabilizer using the Optical, Coax and / or L/R analog audio cables. Connect another set of L/R analog audio cables from the Audio Output section of the GefenTV 2.1 Audio Amplifier w/ Volume Stabilizer to the inputs of the A/V equipment.
Page 17: Status Screen
MENU SYSTEM Status Screen The Status Screen displays information regarding the current settings of the Volume Stabilizer The Status Screen is also used in conjunction with navigating the built-in Menu System. After powering on the Volume Stabilizer, the Standby Screen will be displayed. The Standby Screen indicates the currently selected A/V input, the current volume setting, the audio input format, and the audio processing mode: Audio Input...
Page 18: Selecting The Audio Input
MENU SYSTEM Selecting the Audio Input Use the Input Button to select between Coax (S/PDIF) or Optical (TOSLINK) inputs. Each time the Input Button is pressed, the Audio Amplifier will cycle to the next input option. The currently selected audio input will be displayed in the Status Screen: OPTICAL +04D...
Page 19: Bypass Mode
MENU SYSTEM Bypass Mode Bypass mode is recommended when listening to music or watching movies which have a wide dynamic range. When Bypass mode is enabled, Dolby® Volume processing is disabled. Bypass mode can be enabled or disabled by using the Bypass button on the front panel.
Page 20: Using The Menu System
MENU SYSTEM Using the Menu System The 2.1 Audio Amplifier w/ Volume Stabilizer comes with a built-in menu system which provides control over additional audio features. The following examples demonstrate some of the more common features of the Volume Stabilizer. Setting the Speaker Size Adjusting the speaker size determines how each speaker handles low frequency bands.
Page 21 MENU SYSTEM Subwoofer Crossover Frequency If the speaker size for Sub is set to OnSub, then the subwoofer crossover frequency can be adjusted. Speaker Crossover Frequency 50 Hz 60 Hz 90 Hz Press the ▼ button. The following screen will be displayed: SPEAKER SIZE SUB FREQ.
Page 22: Setting The Speaker Level
MENU SYSTEM Setting the Speaker Level Modifying the Speaker Level increases or decreases the audio output gain of a specific speaker. This feature is useful for equalizing the sound at the listening position. By default, each speaker’s output is set to 0 dB. The output can be adjusted by 1 dB increments between -10 dB and +10 dB.
Page 23 MENU SYSTEM Front Right Press the ▼ button. The following screen will be displayed: SPEAKER LEVEL FRONT R (+00db) Use the ◄ and ► buttons on the front panel to adjust the speaker gain. Subwoofer Press the ▼ button on the front panel. The following screen will be displayed: SPEAKER LEVEL (+00db)
Page 24: Adjusting The Speaker Distance
MENU SYSTEM Adjusting the Speaker Distance Adjusting the speaker adds delay in the audio signal which allows the speaker to sound as if it is a certain distance away even when there is no space to physically position it father away from the listener. A 1ms delay is equivalent to moving the speaker away (from the listener) by 1 foot.
Page 25: Adjusting The Tone Control
MENU SYSTEM Subwoofer Press the ▼ button. The following screen will be displayed: SPEAKER DISTANCE (9ft) Use the ◄ and ► buttons on the front panel to adjust the speaker distance for the Subwoofer. Exiting the Speaker Distance Menu Press the ▼ button. The following screen will be displayed: SPEAKER DISTANCE EXIT Press the Enter button on the front panel to return to the Speaker Distance...
Page 26 MENU SYSTEM Press the Enter button. Use the ◄ and ► buttons on the front panel to adjust the amount of bass (low frequency boost) applied to the output audio signal: TONE CONTROL BASS (+0db) Treble Press the ▼ button. The following screen will be displayed: TONE CONTROL TREBLE (+0db)
Page 27: Miscellaneous Setup
MENU SYSTEM Miscellaneous Setup The Miscellaneous Setup Menu (Misc. Setup) provides controls for enabling or disabling Dolby® Volume, adjusting the Dolby® Volume threshold, down-mixing, line-out mode, IR channel, and front-panel display contrast settings. Miscellaneous Setup Menu 2CH Downmix Dolby Volume Level Lt/Rt Lo/Ro High...
Page 28 MENU SYSTEM 2 Channel Downmix Press the ▼ button on the front panel to display the 2 Channel Downmix screen: MISC SETUP 2chdownmix (ltrt) Use the ◄ and ► buttons on the front panel to between Lo / Ro and Lt / Rt. If the downmix is set to Lo / Ro, then only the Left and Right channels will be mixed down to 2 channel stereo.
Page 29 AMP: Set the Line Out Mode to AMP if the volume will be controlled by the GefenTV 2.1 Audio Amplifier w/ Volume Stabilizer. IR Channel From the Line Out Mode screen, press the ▼ button on the front panel to...
Page 30: Rs-232 Serial Control
RS-232 SERIAL CONTROL 5 4 3 2 1 1 2 3 4 5 9 8 7 6 6 7 8 9 Only Pins 2 (RX), 3 (TX), and 5 (Ground) are used on the RS-232 serial interface RS-232 Settings Bits per second .................... 19200 Data bits .......................
Page 31: Rs-232 Serial Commands
RS-232 SERIAL COMMANDS Commands Command Description 2CHMX 2-channel downmixing BASS Increases / decreases the amount of bass Reset unit to factory (default) settings DFLT DISPBRT Display Brightness DISTFL Sets the distance for the Front Left speaker Sets the distance for the Front Right speaker DISTFR DISTSB Sets the distance for the Subwoofer...
Page 32 RS-232 SERIAL COMMANDS 2CHMX Command The 2CHMX command... Syntax: 2CHMX param1 Parameters: param1 Value Value Meaning LoRo Downmix LoRo LtRt Downmix Lt/Rt Notes: Use ? for param1 to retrieve the current value. BASS Command The BASS command sets the bass level. Syntax: BASS param1 Parameters:...
Page 33 RS-232 SERIAL COMMANDS DFLT Command The DFLT command sets the unit to the default settings. Syntax: DFLT Parameters: None Returns DEFAULT DISPBRT Command The DISPBRT command sets the brightness for the front panel LCD. Syntax: DISPBRT param1 Parameters: Value param1 Value Meaning Increase brightness level by 1...
Page 34 RS-232 SERIAL COMMANDS DISTFL Command The DISTFL command sets the distance (in feet) for the Front Left speaker. Syntax: DISTFL param1 Parameters: Distance [0 ... 33] param1 Returns: DISTFL param1 Notes: The + or - character can also be used, instead of specifying a value, in order to increase or decrease the distance by 1 foot intervals.
Page 35 RS-232 SERIAL COMMANDS DISTSB Command The DISTFB command sets the distance (in feet) for the Subwoofer. Syntax: DISTSB param1 Parameters: Distance [0 ... 33] param1 Returns: DISTSB param1 Notes: The + or - character can also be used, instead of specifying a value, in order to increase or decrease the distance by 1 foot intervals.
Page 36 RS-232 SERIAL COMMANDS DVL Command The DVL command sets the Dolby® Volume level. Syntax: DVL param1 Parameters: Value [LOW, MED, HIGH] param1 Value Meaning Dolby® Volume Low Dolby® Volume Med HIGH Dolby® Volume High Returns: DVL param1 Notes: Use ? for param1 to retrieve the current value. When using a ? for param1, do not include a space between the command and the parameter.
Page 37 RS-232 SERIAL COMMANDS FLR Command The FLR command sets the size for the Front Left / Front Right speakers. Syntax: FLR param1 Parameters: Size [0 ... 1] param1 Value Meaning Small Front Speakers Large Front Speakers Returns: FLR param1 Notes: Use ? for param1 to retrieve the current value.
Page 38 RS-232 SERIAL COMMANDS INFO Command The INFO command returns hardware and firmware version. Syntax: INFO? Parameters: Notes: The ? character must follow the command without a space. INPUT Command The INPUT command selects the audio input. Syntax: INPUT param1 Parameters: Value [LR, COAX, OPT] param1...
Page 39 RS-232 SERIAL COMMANDS INTYPE Command The INTYPE query command returns the audio input format. Syntax: INTYPE Parameters: None Returns: Value Value Value Meaning PCM 2Ch PCM Stereo Dolby Digital 2.1 Dolby Digital 5.1 Notes: None...
Page 40 RS-232 SERIAL COMMANDS IR Command The IR command sets the IR channel. Syntax: IR param1 Parameters: Channel [1 ... 4] param1 Input Meaning IR Channel 1 IR Channel 2 IR Channel 3 IR Channel 4 Returns: IR param1 Notes: Use ? for param1 to retrieve the current value. When using a ? for param1, do not include a space between the command and the parameter.
Page 41 RS-232 SERIAL COMMANDS LFV Command The LFV command sets the output gain of the Left Channel. Syntax: LFV param1 Parameters: Value param1 Value Meaning Increase gain by 1 dB Decrease gain by 1 dB Returns: LFV param1 Notes: Use ? for param1 to retrieve the current value. When using a ? for param1, do not include a space between the command and the parameter.
Page 42 RS-232 SERIAL COMMANDS MUTE Command The MUTE command sets the audio mode. Syntax: MUTE param1 Parameters: Mode [0 ... 3] param1 Mode Meaning Disable mute Enable mute TOGGLE Mute toggle Returns: MUTE param1 Notes: Use ? for param1 to retrieve the current value. When using a ? for param1, do not include a space between the command and the parameter.
Page 43 RS-232 SERIAL COMMANDS POWER Command The POWER command turns the unit ON or OFF. Syntax: POWER param1 Parameters: Mode [OFF, ON, TOGGLE] param1 Mode Meaning Power save mode Power On TOGGLE Toggle power state Returns: POWER param1 Notes: Use ? for param1 to retrieve the current value. When using a ? for param1, do not include a space between the command and the parameter.
Page 44 RS-232 SERIAL COMMANDS RTV Command The RTV command sets the output gain of the Right Channel. Syntax: RTV param1 Parameters: Value param1 Value Meaning Increase gain by 1 dB Decrease gain by 1 dB Returns: RTV param1 Notes: Use ? for param1 to retrieve the current value. When using a ? for param1, do not include a space between the command and the parameter.
Page 45 RS-232 SERIAL COMMANDS STAT Command The STAT command enables or disables auto status feedback. Syntax: STAT param1 Parameters: Mode [OFF, ON] param1 Mode Meaning Auto Status Off Auto Status On Returns: STAT param1 Notes: Use ? for param1 to retrieve the current value. When using a ? for param1, do not include a space between the command and the parameter.
Page 46 RS-232 SERIAL COMMANDS SUB Command This command performs two functions: 1) Enabling or disabling the Subwoofer. 2) Specifies the Subwoofer crossover frequency. Syntax: SUB param1 Parameters: param1 Mode [0 ... 1] Mode Meaning Subwoofer Off Subwoofer On Crossover freq = 50 Hz Crossover freq = 60 Hz Crossover freq = 90 Hz Returns:...
Page 47 RS-232 SERIAL COMMANDS SUBV Command The SUBV command sets the volume level of the Subwoofer. Syntax: PWR param1 Parameters: Range [-12 ... 12] param1 Returns: SUBV value Notes: The + or - character can also be used, instead of specifying a value, in order to increase or decrease the Subwoofer level by 1 dB intervals.
Page 48 RS-232 SERIAL COMMANDS VOL Command The VOL command sets the master output gain. Syntax: VOL param1 Parameters: Range [-12 ... 12] param1 Returns: VOL value Notes: The + or - character can also be used, instead of specifying a value, in order to increase or decrease the master output gain by 1 dB intervals.
Page 49: Menu System Summary
MENU SYSTEM SUMMARY Main Menu COAX -10db PCM 2CH V ON MAIN MENU SPEAKER SIZE MAIN MENU SPEAKER LEVEL MAIN MENU SPEAKER DISTANCE MAIN MENU TONE CONTROL MAIN MENU MISC SETUP MAIN MENU EXIT...
Page 50 MENU SYSTEM SUMMARY Speaker Size Main Menu MAIN MENU SPEAKER Size Menu Enter ▲ SPEAKER SIZE FRONTL/R (large) Large Small ▲ Menu ▲ SPEAKER SIZE (onsub) OnSub None ▲ Menu ▲ SPEAKER SIZE SUB FREQ. (50Hz) 50 Hz ▲ 60 Hz 90 Hz Menu ▲...
Page 51 MENU SYSTEM SUMMARY Speaker Level Main Menu MAIN MENU SPEAKER LEVEL Menu Enter ▲ SPEAKER LEVEL FRONT L (+00db) Min: -10 db Max: +10 db ▲ Menu ▲ SPEAKER LEVEL FRONT R (+00db) Min: -10 db Max: +10 db ▲ Menu ▲...
Page 52 MENU SYSTEM SUMMARY Speaker Distance Main Menu MAIN MENU SPEAKER DISTANCE Menu Enter ▲ SPEAKER DISTANCE FRONT L (9ft) Min: 0 ft. Max: 33 ft. ▲ Menu ▲ SPEAKER DISTANCE FRONT R (9ft) Min: 0 ft. Max: 33 ft. ▲ Menu ▲...
Page 53 MENU SYSTEM SUMMARY Tone Control Main Menu MAIN MENU TONE CONTROL Menu Enter ▲ TONE CONTROL BASS (+0db) ▲ Menu ▲ TONE CONTROL TREBLE (+0db) Lo/Ro Lt/Rt ▲ Menu ▲ TONE CONTROL EXIT ▲ High Menu...
Page 54: Miscellaneous Setup
MENU SYSTEM SUMMARY Miscellaneous Setup Main Menu MAIN MENU MISC. SETUP Menu Enter ▲ MISC SETUP (OFF) ▲ Menu ▲ MISC SETUP 2CHDOWNMIX (LT/LR) Lo/Ro Lt/Rt ▲ Menu ▲ MISC SETUP v lvl (high) ▲ High ▲ Menu...
Page 55 MENU SYSTEM SUMMARY ▲ ▲ MISC SETUP LINEOUTMODE (FIX) ▲ Menu ▲ MISC SETUP IR CHANNEL ▲ Menu ▲ MISC SETUP LCM CONTRAST ▲ ▲...
Page 56: Exit
MENU SYSTEM SUMMARY ▲ ▲ MISC SETUP EXIT Menu ▲...
Page 57: Specifications
SPECIFICATIONS Speaker Output..............25 W per channel RMS SNR......................> 90 dB THD............< 0.001% at 0 dBFS or 2 V rms Analog In Frequency Response............. 20 Hz - 20 kHz (± 0.5 dB) Analog Audio Input............... (1) L/R, (2) RCA jacks Digital Audio Inputs............
Page 58: Warranty
WARRANTY Gefen warrants the equipment it manufactures to be free from defects in material and workmanship. If equipment fails because of such defects and Gefen is notified within two (2) years from the date of shipment, Gefen will, at its option, repair or replace the equipment, provided that the equipment has not been subjected to mechanical, electrical, or other abuse or modifications.
Page 60 Rev A1 20600 Nordhoff St., Chatsworth CA 91311 1-800-545-6900 818-772-9100 fax: 818-772-9120 www.gefentv.com support@gefentv.com This product uses UL listed power supplies.