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Clear-Com ENCORE AMS-1027 Скачать руководство пользователя страница 10

A M S - 1 0 2 7 A M P L I F I E D S P E A K E R S T A T I O N

1 - 4

Internal Speakers

The AMS-1027’s internal speaker system is comprised of two mid/high-range
speakers (left and right) and one woofer speaker (center). The two side channel
speakers reproduce, in stereo, only the mid and high frequencies, while the center
woofer speaker reproduces the low frequencies summed from both the left and
right channels.

Volume Control

The volume-control knob adjusts the loudness of the audio reproduced by the
internal speakers or connected headphone.

Audio Level Bargraph Meter Displays

Audio levels for the left and right channels are displayed via two 10-segment
LED bargraph meters on the respective sides of the front panel. Dynamic range
for these meters is 23 dB. Gain calibration for these meters is via two recessed
trim pots on the rear panel (see “Rear Panel Connectors and Controls” later in
this chapter for more information). Meters are factory set for VU mode and gain
at 0 = +4 dBu.

Power Indicator LED

The power indicator LED signals the operating condition of the power supply.
The LED glows green to indicate the AMS-1027 is connected to mains power
and an operating voltage is present.

Headphone Jack

For critical listening or for listening in high noise environments, use the stereo
headphone feature rather than the internal speakers. The left and right channels
are separated for stereo listening in the headphones. When you plug in
headphones, the internal speakers will mute. This jack accepts the standard
1/4-inch tip-ring-sleeve stereo plug.

Balance Control

This control pans the volume balance between the left and right speakers. If the
balance is adjusted hard left or right, a slight L+R channel mix is retained (only
in low bass frequencies) so that phase discrepancies can be discerned.

Separate left and right volume controls may be selected via internal jumpers in
lieu of a balance control. For instructions on how to perform this retrofit, see
“VOL/BAL to A-VOL/B-VOL Retrofit Instructions” on page 1-6.

1

2

3

4

5

6

The AMS-1027’s front-panel

controls and indicators are

illustrated in Figure 1-3.

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Содержание ENCORE AMS-1027

Страница 1: ...AMS 1027 AMPLIFIED MONITOR SPEAKER I N S T R U C T I O N M A N U A L CLEAR COM ENCORE ...

Страница 2: ...y Alameda CA 94501 U S A Vitec Group Communications 7400 Beach Drive Cambridge Research Park Cambridgeshire United Kingdom CB25 9TP Vitec Group Communications Room 1806 Hua Bin Building No 8 Yong An Dong Li Jian Guo Men Wai Ave Chao Yang District Beijing P R China 100022 Clear Com CellCom FreeSpeak and the Clear Com Communication Systems logo are registered trademarks of The Vitec Group plc ...

Страница 3: ...nnector 1 5 XLR Connectors for Balanced Inputs and Loop Through on Channels A and B 1 5 Input Gain VU Meter Level Adjust for Channels A and B 1 5 RCA Connectors for Unbalanced Inputs on Channels A and B 1 6 Vol Bal to A Vol B Vol Retrofit Instructions 1 6 INSTALLATION 2 1 Quick Start 2 1 Mounting 2 1 Heat Dissipation 2 1 Sympathetic Vibration 2 1 Mechanical Bracing 2 1 Audio Connections 2 1 Electr...

Страница 4: ...mponent Layout Drawings 3 5 AMS 1027 Left and Right Meter Driver PCA Schematic 3 6 AMS 1027 Main Audio PCA Component Layout Drawing 3 7 SPECIFICATIONS 4 1 AMS 1027 Amplified Speaker Station 4 1 LIMITED WARRANTY 5 I Warranty Period 5 i Technical Support 5 i Warranty Repairs and Returns 5 ii Non Warranty Repairs and Returns 5 ii Extended Warranty 5 ii Service Contract 5 iii Liability 5 iii ...

Страница 5: ...re they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 12 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over 13 Unplug this apparatus during lightning storms or when unused for long periods of ...

Страница 6: ...mbol alerts you to the presence of uninsulated dangerous voltage within the product s enclosure that might be of sufficient magnitude to constitute a risk of electric shock Do not open the product s case This symbol informs you that important operating and main tenance instructions are included in the literature accompanying this product ...

Страница 7: ... 1027 has two multi segment LED bar type level displays adjustable from the rear panel To achieve the extended bass response produced by the AMS 1027 the low frequency signals from both channels are summed into a single bass amplifier This amplifier drives a specially developed baffled loudspeaker which is centered in the unit The mid high frequency drivers are mounted at opposite ends of the AMS ...

Страница 8: ...units makes it ideal for use in portable and mobile vehicle applications Figure 1 1 AMS 1027 Amplified Speaker Station Figure 1 2 Interior of AMS 1027 Unit FEATURES Selectable monitoring of one stereo analog signal in one unit Although only one rack space high the AMS 1027 produces 96 dB SPL at 2 feet Volume Balance controls are standard internally configurable as A volume B volume 10 segment leve...

Страница 9: ...n high noise environments The two front firing midrange tweeter speakers and compact high performance woofer along with the summed bass feature offer accurate sound reproduction and audible detection of out of phase conditions Damage to speakers from high input levels are prevented by using in circuit limiters For more detailed information see the audio circuit description and the interconnect blo...

Страница 10: ...U mode and gain at 0 4 dBu Power Indicator LED The power indicator LED signals the operating condition of the power supply The LED glows green to indicate the AMS 1027 is connected to mains power and an operating voltage is present Headphone Jack For critical listening or for listening in high noise environments use the stereo headphone feature rather than the internal speakers The left and right ...

Страница 11: ...eft and Channel B right with each section comprised of one standard input connector and one passive loop through connector Both the input and loop through connectors are configured for a balanced high impedance connection The BALANCED IN XLR connectors are panel mounted 3 pin females and are internally terminated The LOOP THRU XLR connectors are panel mounted 3 pin males and are unterminated for c...

Страница 12: ...TO A VOL B VOL RETROFIT INSTRUCTIONS The AMS 1027 is configured at the factory with Volume Balance controls To change the function of the Volume Balance controls on the front panel to an A Volume B Volume left and right configuration follow the instructions below 1 Disconnect the unit from AC and all line connections 2 Remove the AMS 1027 s top cover 3 Locate the Vol Bal harness flat cable running...

Страница 13: ...A M S 1 0 2 7 A M P L I F I E D S P E A K E R S T A T I O N 1 7 Figure 1 5 Locate the volume balance cable Figure 1 6 Unplug the cable from jumper 18 and plug it into jumper 16 ...

Страница 14: ...MPATHETIC VIBRATION Sympathetic vibration from other equipment cables etc in the rack may be serious enough to interfere with the unit s sound quality in the listening area The use of thin card stock and or felt or foam weather stripping type materials between adjacent vibrating surfaces or tying up loose cables and so on may be required to stop vibrations external to the unit MECHANICAL BRACING E...

Страница 15: ... a single ended source connected across both hot terminals than when connected between either pin 2 or 3 and common Note that the unused input terminal of a balanced input should be connected to common rather than being left floating to insure best immunity to noise AC POWER The unit s AC mains connection is via a standard IEC inlet with safety ground connected directly to the unit s chassis The u...

Страница 16: ... is used all amplifier sections are biased with a 1 2 supply reference so all opamp signal terminals on the main board should have a DC level of 12 0 7V Signal inputs to the main audio board are via the balanced XLR analog inputs or unbalanced RCA inputs Signal feed points for level meters and the phase indicator are immediately after the input stage and before the volume control section The signa...

Страница 17: ...l The driver PCB connects the LEDs in the bargraph in a series string The anode of the LED corresponding to the lowest input level 20 is connected to V with the other 9 LEDs following and the outputs of the bargraph connected to the node between each LED Note Only one output of the bargraph is active low at any one time so if the LED string is broken open at any point the bargraph will go OFF when...

Страница 18: ...ns develop limiting control voltages for each VCA section A voltage above 2 volts across D2 and D6 will cause a lower gain in the corresponding section of the VCA HEADPHONE AND SPEAKERS The output of the four VCAs IC8A and IC8B is also the input circuitry for the headphone amplifier as well as the input of the speaker amplifiers through IC7 Signals from IC8 are passed through IC10 highpass filters...

Страница 19: ...A M S 1 0 2 7 A M P L I F I E D S P E A K E R S T A T I O N 3 4 AMS 1027 INTERCONNECT BLOCK DIAGRAM Figure 3 1 Interconnect Block Diagram 7 ...

Страница 20: ...S P E A K E R S T A T I O N 3 5 LEFT AND RIGHT METER DRIVER PCA COMPONENT LAYOUT DRAWINGS Figure 3 2 Left and Right Meter Driver PCA Component Layout Drawings Left Meter Driver PCA Layout Drawing Right Meter Driver PCA Layout Drawing ...

Страница 21: ...A M S 1 0 2 7 A M P L I F I E D S P E A K E R S T A T I O N 3 6 AMS 1027 LEFT AND RIGHT METER DRIVER PCA SCHEMATIC Figure 3 3 Left and Right Meter Driver Schematic ...

Страница 22: ...A M S 1 0 2 7 A M P L I F I E D S P E A K E R S T A T I O N 3 7 AMS 1027 MAIN AUDIO PCA COMPONENT LAYOUT DRAWING Figure 3 4 AMS 1027 Main Audio PCA Component Layout Drawing ...

Страница 23: ...22u J 1 8 CON16A 1 3 5 7 9 1 1 1 3 1 5 2 4 6 8 1 0 1 2 1 4 1 6 R87 47K C83 560 PF C19 47u D2 LED 1 2 SP1 10K C84 00pf J 1 6 CON16A 1 3 5 7 9 1 1 1 3 1 5 2 4 6 8 1 0 1 2 1 4 1 6 C2 1 560 PF R1 2 7K R27 1 OHM C18 2 20PF R78 47 OHM R7 4 3 3K C37 1u C2 8 560 PF C33 47u SP4 10K IC2B L F353 5 6 7 8 4 SP8 33K S IP I4 R77 4 7k R73 3 3 K IC3B LF353 5 6 7 8 4 R 4 8 1 0 K JP4 HEADER 4 1 2 3 4 C39 47u IC3A LF...

Страница 24: ...Better than 70dB below full output Acoustic freq response 60 Hz to 16 KHz 6dB Maximum acoustic output 96dB SPL at 2 feet Electrical distortion Less than 0 3 at any level below limiting threshold Acoustic distortion speaker outputs Typically 2 at any level below limiting 100 Hz 15 KHz Magnetic shielding Less than 0 3 Gauss any adjacent surface Power Amp Output to Speakers Average 5 watts per L R ch...

Страница 25: ...x D 1 75 x 19 x 9 inches 44 5 x 483 x 229 mm Weight 7 5 lbs 3 4 kg Notice About Specifications While Clear Com makes every attempt to maintain the accuracy of the information contained in its product manuals that information is subject to change without notice Performance specifications included in this manual are design center specifications and are included for customer guidance and to facilitat...

Страница 26: ...A M S 1 0 2 7 A M P L I F I E D S P E A K E R S T A T I O N 4 3 ...

Страница 27: ...ar UHF wireless intercom systems have a limited warranty of three years All other Clear Com and Drake brand systems and products including beltpacks have a limited warranty of two years The warranty starts at the time of the product s original purchase The warranty start date for contracts which include installation and commissioning will commence from the earlier of date of the Site Acceptance Te...

Страница 28: ...ipment at VGC s expense For out of box failures use the following contact information Europe Middle East and Africa Tel 44 1223 815000 Email customerservicesEMEA vitecgroup com North America Canada Mexico Caribbean US Military Tel 1 510 337 6600 Email customerservicesUS vitecgroup com Asia Pacific South America Tel 1 510 337 6600 Email customerservicesAPAC vitecgroup com VGC has the right to inspe...

Страница 29: ...BILITY OR OTHERWISE WITH RESPECT TO THE PRODUCTS OR ANY PART THEREOF DELIVERED HEREUNDER OR FOR ANY DAMAGES AND OR LOSSES INCLUDING LOSS OF USE REVENUE AND OR PROFITS SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES OR THE LIMITATION ON HOW LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU IN ANY EVENT TO THE MAXIMUM EXTENT PERM...

Страница 30: ... in damage to VGC provided product This limited warranty is not transferable and cannot be enforced by anyone other than the original consumer purchaser This warranty gives you specific legal rights and you may have other rights which vary from country to country ...

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