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T

ANNOY 

L

IMITED

, P

ROFESSIONAL 

D

IVISION

, C

OATBRIDGE

, ML5 4TF. S

COTLAND

 

T

ELEPHONE

: +44 (0) 1236 420199   F

AX

: +44 (0) 1236 428230   E-M

AIL

[email protected] 

 

A M

EMBER OF THE 

TGI 

PLC 

G

ROUP OF 

C

OMPANIES

 

 

 

TMA120 

OPERATING INSTRUCTIONS 

 

TABLE OF CONTENTS

 

 
Front Panel Features 
 
Rear Panel Features 
 
Modifications 
 
Applications 
 
Specifications 
 
Block Diagram 
 
Warranty Statement 
 
Appendices 

pg. 2

pg. 3

pg. 5

pg. 6

pg. 10

pg. 10

 pg. 11

 pg. 12

 

 

INTRODUCTION

 

 
The 

TMA120

 commercial mixer/amplifier combines a versatile 6-

input mic/line mixer with 120 Watt amplification.  Mixing
functions include mic/line/telephone inputs, selectable automatic
& manual channel muting, channel priority assignment, remote 
level control, tone control, a built-in compressor, an internal 
chime, phantom power, and extensive output patching.  The
amplifier includes an output transformer, and provides rated
power into direct or distributed speaker systems.   
 
TMA120 features include: 

• 

integrated mixer, power amplifier, and output transformer 

• 

five electronically balanced microphone/line input channels 

• 

one transformer balanced microphone/line/tel input channel 

• 

rear panel trim control & pad switch on each input channel 

• 

+24 Volt phantom power selectable on each input channel 

• 

input isolation transformer option on mic/line input channels 

• 

automatic muting of selected channels (-10, -20, or -40dB) 

• 

automatic muting triggered by selected "priority" channels 

• 

manual muting of selected channels (-10, -20, or -40dB) 

• 

manual muting triggered from remote contact closures 

• 

remote control of master level via rear panel terminals 

• 

integral output compressor with rear panel threshold control 

• 

recessed treble & bass controls plus "loudness" & "low-cut" 

• 

two insert points for signal processing and remote control 

• 

two line-outs and one stack-in for system interconnections 

• 

120 Watts into direct or distributed systems 

• 

front panel indicators for power, fault, signal, and peak 

• 

internal 'pre-announcement' chime tone with level control 

• 

input/output connections provided on barrier strip terminals 

• 

integral security cover and removable rack-wing/handles 

• 

covered by two year warranty 

• 

 marked, 

UL

 and 

C-UL

 (UL Canada) listed 

 

 

Summary of Contents for TMA120

Page 1: ...put transformer five electronically balanced microphone line input channels one transformer balanced microphone line tel input channel rear panel trim control pad switch on each input channel 24 Volt phantom power selectable on each input channel input isolation transformer option on mic line input channels automatic muting of selected channels 10 20 or 40dB automatic muting triggered by selected ...

Page 2: ...put 10dB 100Hz Treble This screwdriver control adjusts the high frequencies Treble at the mixer output 10dB 10kHz Peak Indicator This red LED flashes when signal levels at the amplifier output have reached maximum Occasional flashes of the Peak Indicator are acceptable however a continuously lit LED may indicate an excessive level setting Signal Indicator This yellow LED remains lit when signal is...

Page 3: ...y when a plug is inserted Line Out This RCA phono jack provides an unbalanced line level output from the mixer Line Out is after Stacking In Loudness Tone Compressor Master Level but before Low Cut Rec Out This RCA phono jack provides an unbalanced line level output from the mixer Rec Out is after Stacking In but before Loudness Tone Compressor Master Level Low Cut Pre Out This RCA phono jack prov...

Page 4: ...muted whenever signal is present in any priority channel Manual Mute assigns a channel to be muted whenever the Mute Chime terminals are shorted together via a switch or contact closure Mute Level assigns the amount of muting 10dB 20dB or 40dB which is applied to a channel when triggered by either Auto Mute or Manual Mute NOTE 10dB muting will occur when both switches are to the right 40dB muting ...

Page 5: ... the security cover WARNING TO REDUCE THE RISK OF SHOCK DISCONNECT ALL POWER FROM THE UNIT BEFORE MAKING ANY INTERNAL MODIFICATIONS OR EXTERNAL FIELD WIRING CONNECTIONS 230V 115V AC Operation The TMA120 may be converted to 115V operation for use in other countries To convert to 115V operation 1 Remove the fuse holder compartment from the lower portion of the rear panel AC Power Cord receptacle 2 R...

Page 6: ...ired to the Mute Chime terminals of the TMA120 Channel 3 is set for input from the line level background music source and is assigned manual and auto muting of 20dB Therefore telephone paging will automatically mute only the background music whereas security paging will manually mute both the background music and the telephone paging The TMA120 is set for xfmr output and is connected to a 70V 100V...

Page 7: ...ack which is also connected to Rec Out of the TMA120 recording If additional inputs are required an auxiliary mixer such as another TMA120 may be connected to the Stacking In terminals of the TMA120 The mixer amplifier is set for direct 4Ω output and is connected in parallel to the two 8Ω speaker cabinets WARNING THE ABOVE DIAGRAM SHOWS THE OUTPUT TERMINAL COVER REMOVED FOR CLARITY ONLY THE COVER ...

Page 8: ...to talk switch wired to the Mute Chime terminals Channel 6 is set for input from the line level Pre Out of the store TMA120 and is assigned manual muting of 40dB Therefore the digital message repeater will automatically mute only the background music 10dB whereas telephone paging will manually mute both the background music 10dB and the digital message repeater 20dB These combined signals from the...

Page 9: ...g of 40dB The push to talk switch of each floor paging microphone is wired to the Mute Chime terminals of the respective TMA120 Channel 3 of each TMA120 is set for input from line level background music and is assigned manual and auto muting of 20dB Therefore local paging will manually mute the background music only on that floor 20dB whereas all call paging will automatically mute background musi...

Page 10: ... Output Regulation no load to full load 0 5dB preamp output line output 200Ω 4dBu 1 2V Equivalent Input Noise mic in 150Ω termination 0 2 record output 200Ω 4dBu 1 2V Signal to Noise Ratio 20Hz 20kHz rated power patch send output 50Ω 8dBu 300mV line inputs 78dB Amplifier Output Impedance Level telephone inputs 78dB 4 Ω 22V 20 8 Ω 50V master level off 98dB 8 Ω 31V 40 8 Ω 70V Compressor 5 2 Ω 25V 83...

Page 11: ...n your country The best way to do this is through the Tannoy website at www tannoy com However if you cannot locate your local distributor please contact Customer Services Tannoy Limited Professional Division Rosehall Industrial Estate Coatbridge Strathclyde ML5 4TF SCOTLAND Telephone 01236 420199 UK 44 1236 420199 International Fax 01236 428230 UK 44 1236 428230 International e mail service tanno...

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