Studiomaster Professional XPA 40 Instruction Manual

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XPA 40

Professional Power Amplifier

0 10

CH A

0 10

CH B

XPA 40

POWER

Index

1...........................................................................................................................................................................................Warranty Information

2...........................................................................................................................................................................................................Introduction

3...........................................................................................................................................................................................Features at a Glance

4...........................................................................................................................................................................Front & Rear Panel Description

5..............................................................................................................................................................................................Wiring Information

6................................................................................................................................................................................... ..........System Application

7......................................................................................................................................................................................................Block Diagram

8...................................................................................................................................................................................Protections & Installations

9.................................................................................................................................................................................................Trouble Shooting

10.....................................................................................................................................................................................Technical Specifications

Explanation of Graphical Symbols

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF

ELECTRIC SHOCK, DO NOT REMOVE

COVER (OR BACK). NO USER-SERVICEABLE

PARTS INSIDE. REFER SERVICING TO

QUALIFIED SERVICE PERSONNEL.

IMPORTANT SAFETY INSTRUCTIONS

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.

IMPORTANT NOTICE

Connecting the Plug and Cord

WARNING: THIS APPARATUS MUST BE EARTHED IMPORTANT. The wires in this mains lead are coloured in accordance with the following code: GREEN-AND-YELLOW: EARTH BLUE: NEUTRAL BROWN: LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug proceed as follows: The wire which is coloured GREEN-and-YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or colored GREEN or GREEN-and-YELLOW. The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.

1 Read these instructions. 2 Keep these instructions. 3 Heed all warnings. 4 Follow all instructions. 5 Do not use this apparatus near water. 6 Clean only with dry cloth. 7 Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. 8 Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9 Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. 10 Only use attachments/accessories specified by the manufacturer. 11 Use only with the cart, stand, tripod, bracket, or table spec ified by the manufacturer, or sold with the apparatus. When a cart is used, use cau tion when moving the cart/ apparatus combination to avoid injury from tip-over.

12 Unplug this apparatus during lightning storms or when unused for long periods of time. 13 Refer all servicing to qualified service personnel. Servicing in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture. does not operate normally, or has been dropped.

Tips for Safe Operation

The 3 core AC mains cable should be terminated with this AC mains plug by connecting brown/red wire on live pin (L), black wire on neutral pin (N) and yellow/green wire on earth pin (E).

The amplifier must be connected to an AC earthed mains oultet that can delivered the maximum power required. The use of extension cables or adaptors should be avoided as this can jeoparadize correct delivery to the amplifier.

All connections must only be carried out or changed with the amplifier switched OFF.

Ensure proper impedance matching while in use for BRIDGE mode applications. For continous safe operation, resultant impedance of the speakers 8 ohm/4 ohm is recommended.

For 2 ohm/4 ohm applications, it is recommended to use speakon connectors only. Use of cable 40/36 or thicker is recommended to prevent power losses.

The level of input signal should not exceed the specified input sensitivities. Excessive input signal level result in over driving of input circuit which leads to saturated / distorted output at speaker terminals.

Do not operate the amplifier with continuously blinking CLIP LED. The respective volume control of the channels must be adjusted so that the output level does not clip and distort.

Do not obstruct the front or back of the amplifier for necessary intake of air.

Precautions

For safe operation

WARNING

Installation

Connect this unit’s power cord only to an AC outlet of the type stated in this Owner’s Manual or as marked on the unit. Failure to do so is a re and electrical shock hazard.

Do not allow water to enter this unit or allow the unit to become wet. Fire or electrical shock may result.

Do not place a container with liquid or small metal objects on top of this unit. Liquid or metal objects inside this unit are a re and electrical shock hazard.

Do not place heavy objects, including this unit, on top of the power cord. A damaged power cord is a re and electrical shock hazard. In particular, be careful not to place heavy objects on a power cord covered by a carpet.

Operation

Do not scratch, bend, twist, pull, or heat the power cord. A damaged power cord is a re and electrical shock hazard.

Do not remove the unit’s cover. You could receive an electrical shock. If you think internal inspection, maintenance, or repair is necessary, contact your dealer.

CAUTION

Do not modify the unit. Doing so is a re and electrical shock hazard.

If lightning begins to occur, turn off the power switch of the unit as soon as possible, and unplug the power cable from the electrical outlet.

If there is a possibility of lightning, do not touch the power cable plug if it is still connected. Doing so may be an electrical shock hazard.

In case an abnormality occurs during operation

If the power cord is damaged (i.e., cut or a bare wire is exposed), ask your dealer for a replacement. Using the unit with a damaged power cord is a re and electrical shock hazard.

Should this unit be dropped or the cabinet be damaged, turn the power switch off, remove the power plug from the AC outlet, and contact your dealer. If you continue using the unit without heeding this instruction, re or electrical shock may result.

If you notice any abnormality, such as smoke, odor, or noise, or if a foreign object or liquid gets inside the unit, turn it off immediately. Remove the power cord from the AC outlet. Consult your dealer for repair. Using the unit in this condition is a re and electrical shock hazard.

Installation

Keep this unit away from the following locations:

- Locations exposed to oil splashes or steam, such as near cooking stoves, humidiers, etc.

- Unstable surfaces, such as a wobbly table or slope.

- Locations exposed to excessive heat, such as inside a car with all the windows closed, or places that receive direct sunlight.

- Locations subject to excessive humidity or dust accumulation.

Do not place the power cord close to a heater. It may melt, causing re or electrical shock.

Hold the power cord plug when disconnecting it from an AC outlet. Never pull the cord. A damaged power cord is a potential re and electrical shock hazard.

Do not touch the power plug with wet hands. Doing so is a potential electrical shock hazard.

This unit has ventilation holes at the front, rear & top to prevent the internal temperature rising too high. Do not block them. Blocked ventilation holes are a re hazard. In particular, do not

- place the unit on its side or upside down,

- place the unit in any poorly-ventilated location such as a bookcase or closet (other than on the dedicated rack),

- cover the unit with a table cloth or place it on a carpet or bed.

Allow enough free space around the unit for normal ventilation. This should be: 5 cm at the sides, 10 cm behind, and 10 cm above. If the airow is not adequate, the unit will heat up inside and may cause a re.

To mount several of these units in a standard EIA rack, refer to the rack mounting instructions on page 16.

To relocate the unit, turn the power switch off, remove the power plug from the AC outlet, and remove all connecting cables. Damaged cables may cause re or electrical shock.

Operation

Use only thick speaker cables when connecting speakers to amplifier outputs. Use of cables type 40/36 or thicker is recommended

for connecting low impedance speakers to avoid power loss in the cables, as heavy current flows through the cables. Using other types of cables is a fire hazard.

Turn off all musical instruments, audio equipment, and speakers when connecting to this unit. Use the correct connecting cables and connect as specied.

Always lower the volume control to minimum before turning on the power to this unit. A sudden blast of sound may damage your hearing.

Do not use this amplier for any purpose other than driving loudspeakers.

If you know you will not use this unit for a long period of time, such as when going on vacation, remove the power plug from the AC outlet. Leaving it connected is a potential re hazard. When operating amplifier on a generator, make sure it is switched

“OFF” till generator voltages has stabilized & then only switch “ON” amplifier.

Be sure of proper impedance of 2/4/8 ohm when used for STEREO/PARALLEL configuration & 4/8 ohm recommended when used in BRIDGE mode.

1. Warranty Information

Unpacking

As part of our quality control system, every Studiomaster Professional product is thoroughly inspected before leaving the factory to ensure a flawless performance. After unpacking, please inspect the unit for any physical damages. In the event that a damage has occurred, kindly notify your Studiomaster Professional dealer immediately. We request you to retain the packing/cartons should the product require servicing/maintenance in the future.

2. Introduction

The Studiomaster Professional XPA series is a premium-grade high power stereo amplifier featuring an intuitive Thermal Management System (TMS) that delivers unmatched sound, uninterrupted performance and optimal protection.

3. Features at a Glance

1. Professional-grade high-power stereo amplifier.

2. High-quality balanced XLR and ¼” Stereo Jack input connectors

3. 3 switchable operational modes: Stereo, Mono & Bridge

4. Intuitive Thermal Management System (TMS) for temperature-controlled gain variation for optimal thermal protection & uninterrupted sonic performance.

5. High-current toroidal transformers with high-endurance cores for greater transient response and low-noise even at 2 Ohms.

6. Sensitivity (0.775V or 1.2V) selection switch allows flexibility in connection of input sources.

7. Limiter switch to protect speakers from damage due to distorted input signals.

8. 41-dented rotary volume control knobs.

9. Low THD & high damping factor for excellent sound quality.

10. High-quality glass epoxy, double-sided PTH PCBs and high-grade components ensure reliability even in tough ambient environs.

11. Intelligent cooling using low-noise variable speed fans & direct mounted over-designed heat-sinks.

12. Built in protection against mains over voltage supply.

4. Front & Rear Panel Description

Front Panel

7 2

0 10

CH A

3 4 5 3 16

0 10

CH B

XPA 40

POWER

1 Master Switch

Switches the unit on and off.

2 Power ON Indicator Light

The Studiomaster Professional logo lights up when the amplifier is powered on.

3 Volume Control

This knob is used to adjust and control the volume and output level of the respective channel.

4 TMS (Thermal Management System)

This amplifier features an innovative temperature controlled gain variation technology called the Thermal Management System (TMS). When the temperature at the heatsink reaches beyond the permissible limit, the TMS circuit intuitively reduces the gain proportionally without any dropouts. This feature prevents the amplifier from going into thermal protection mode thereby ensuring a smooth and uninterrupted sonic performance.

5 Mute Indicator

The Yellow LED lights up when the amplifier is in mute mode. This may occur due to the following reasons: switch on delay (3 seconds),

presence of a continuous voltage on the channel output, short circuit, thermal protection of the channel, or thermal protection of the transformer.

6 Signal & Clip Indicator These 4-segment Green LED lights show the output level of the amplifier. When the Clip LED turns Red, it means that the signal is

distorting/clipping. Kindly reduce the output level from the mixer or other connected devices to avoid any damages.

7 Bass/Boost Indicator This Red LED lights up when the Bass/Boost Function is activated or is in use.

8 Air Intake Grill

This intake grill sucks in air to dissipate the heat generated and keep the amplifier cool.

For best results, do not obstruct the grill and clean the air filter whenever necessary.

Rear Plate

XPA 40

IS 616/IEC 60065

MADE IN INDIA

R - 71003344

SUB

LOW

OFF

CUT

120

180

FREQUENCY (Hz)

0.775V

SENSITIVITY

CHANNEL B

140

1.2V

WARRANTY VOIDS IF SERIAL NO. IS MISSING

MONO

BASS/BOOST

OFF

STEREO

INPUT

BRIDGE

For MONO or BRIDGE MODE use Input CHA.

SUB

OFF

120

FREQUENCY (Hz)

OFF ON

LIMITER

CHANNEL A

121110

Output Connections

ST & MO Mode +1 = speaker +

GND

-1 = speaker -

OUTPUT

240V~/50Hz

30A, 6300W

LOW CUT

140

180

BRIDGE

BR Mode CH A only +1 = speaker + +2 = speaker -

C H A N N E L

16A

MCB

PUSH TO RESET

312218

1 Balanced 6.3 mm Jack Input

This TRS stereo jack connector accepts an input signal (balanced/unbalanced) to drive the respective channel. If the signal is unbalanced, kindly use a mono (TS) connector.

2 Balanced XLR Input

This XLR connector accepts an input signal (balanced/unbalanced) to drive the respective channel. If the signal is unbalanced, pin 2 can be used for the signal and pin 3 connected to the earth.

3 Output Binding Post

The binding post output is used to pick up the amplified signals individually in the stereo mode & in combination in the bridge mode.

4 Output Speakon Connector

Use this connector for picking up the amplified signal of CH 1 & CH2 and signal for bridged configuration.

5 Power Cable

This cable is used to supply the required power to the unit.

6 Circuit Breaker

The circuit breaker is provided to avoid amplifier failure caused due to a sudden surge or continuous high current supply.

7 Configuration Switch

This three-way switch is used to select between the three operational modes: mono, stereo and bridge.

8 Sensitivity

This switch is used to set the input sensitivity either at 0.775V or at 1.2V depending on the source.

9 Frequency Adjustment Knob

When the filter switch is at SUB or at the LOW CUT position, use this knob to adjust the frequency.

10 Filter Switch

Use this switch to select between the following two filter types. SUBWOOFER: This is a low-pass filter. The amplifier reproduces frequencies that are lower than the cut-off set by the frequency adjustment knob. LOW CUT: This is a high-pass filter. You can use this setting to filter out unneeded low or subsonic frequencies.

11 Bass Boost Switch

When you activate this mode, the amplifier adds low-frequency compensation to enhance the speaker's output. Note: This switch is only effective when the FILTER switch is in the OFF position.

12 Limiter

Use this switch to activate or deactivate the built-in limiter. The limiter prevents distortion at the output level. When the output level exceeds its maximum, an internal adjustment is made to prevent overloading. It is specially designed to protect the connected speakers. When the amplifier is used to drive a subwoofer, switch the limiter off for added “punch”.

13 Air Exit Grill

Warm air exits from this grill to dissipate the heat generated and keep the amplifier cool. For best results, do not obstruct the grill and clean the air filter whenever necessary.

14 External Earth Terminal

Use this for a ground/earthing connection if there are any humming problems.

5. Wiring Information.

XLR CONNECTOR STEREO JACK 6.3mm 1/4”

XLR CONNECTOR MONO JACK 6.3mm 1/4”

SPEAKON CONNECTOR

Negative Output

Positive Output

6. System Application. Stereo Mode Configuration

XPA 40

IS 616/IEC 60065

R - 71003344

MADE IN INDIA

Output Connections

BR Mode CH A only

ST & MO Mode +1 = speaker +

SUB

LOW

OFF

CUT

120

180

FREQUENCY (Hz)

0.775V

SENSITIVITY

CHANNEL B

140

1.2V

WARRANTY VOIDS IF SERIAL NO. IS MISSING

MONO

BASS/BOOST

OFF

STEREO

INPUT

BRIDGE

For MONO or BRIDGE MODE use Input CHA.

SUB

OFF

120

FREQUENCY (Hz)

OFF ON

LIMITER

CHANNEL A

LOW CUT

140

180

BRIDGE

GND

-1 = speaker -

OUTPUT

240V~/50Hz

30A, 6300W

+1 = speaker + +2 = speaker -

16A

MCB

PUSH TO RESET

C H A N N E L

MONO BRIDGE

STEREO

1 2

4 5 6 7 8

AQ UA 10

In STEREO mode, both channels A & B are fully independent of each other. The balanced /unbalanced inputs can be connected either to a stereo signal source or two independent mono signal sources. Each channel can separately drive loudspeaker loads of 8 ohm or 4 ohm or 2 ohm.

Connect the Left & Right outputs of a mixer to channel A & B inputs of the amplifier respectively. Inputs can be wired as per fig.1 & 2 (Input Connections for Balanced & Unbalanced Mode) as mentioned in wiring information on page no. 6.

Connect a speaker system (8 ohm / 4 ohm / 2 ohm) on the output terminal of each channel. It is recommended to use the speakon connectors and wire these as per fig.3 (Output Connections for Stereo / Mono Mode) as mentioned in wiring information on page no. 6.

To select STEREO mode, keep the slide switch, provided at rear panel, in STEREO position.

Adjust the individual volume controls of each channel on the front panel to obtain the desired output level.

The level indicator LEDs glow to indicate the presence of signal at the output terminals.

Mono Mode Configuration

XPA 40

IS 616/IEC 60065

R - 71003344

MADE IN INDIA

Output Connections

BR Mode CH A only

ST & MO Mode +1 = speaker +

SUB

LOW

OFF

CUT

120

180

FREQUENCY (Hz)

0.775V

SENSITIVITY

CHANNEL B

140

1.2V

WARRANTY VOIDS IF SERIAL NO. IS MISSING

MONO

BASS/BOOST

OFF

STEREO

INPUT

BRIDGE

For MONO or BRIDGE MODE use Input CHA.

SUB

OFF

120

FREQUENCY (Hz)

OFF ON

LIMITER

CHANNEL A

LOW CUT

140

180

BRIDGE

GND

-1 = speaker -

OUTPUT

240V~/50Hz

30A, 6300W

+1 = speaker + +2 = speaker -

16A

MCB

PUSH TO RESET

C H A N N E L

MONO BRIDGE

STEREO

1 2

4 5 6 7 8

AQ UA 10

When operating in MONO mode, the signal source should be connected to the balanced / unbalanced inputs of channel A only. Both channels provide similar outputs to their respective loudspeakers. Each channel can separately drive loudspeaker loads of 8 ohm or 4 ohm or 2 ohm.

Connect the line output of a mixer to a channel input of the amplifier. Inputs can be wired as per fig.1 & 2 (Input Connections for Balanced and Unbalanced Mode) as mentioned in wiring information on page no. 6.

To select MONO mode, keep the slide switch, provided at rear panel, in MONO position.

The desired output levels of both the channels are adjustable by volume control of both the channels individually.

The level indicator LEDs glow to indicate the presence of signal at the output terminals.

Bridge: Mode Configuration

XPA 40

IS 616/IEC 60065

R - 71003344

MADE IN INDIA

Output Connections

BR Mode CH A only

ST & MO Mode +1 = speaker +

SUB

LOW

OFF

CUT

120

180

FREQUENCY (Hz)

0.775V

SENSITIVITY

CHANNEL B

140

1.2V

WARRANTY VOIDS IF SERIAL NO. IS MISSING

MONO

BASS/BOOST

OFF

STEREO

INPUT

BRIDGE

For MONO or BRIDGE MODE use Input CHA.

SUB

OFF

120

FREQUENCY (Hz)

OFF ON

LIMITER

CHANNEL A

LOW CUT

140

180

BRIDGE

GND

-1 = speaker -

OUTPUT

240V~/50Hz

30A, 6300W

+1 = speaker + +2 = speaker -

16A

MCB

PUSH TO RESET

C H A N N E L

MONO BRIDGE

STEREO

1 2

4 5 6 7 8

AQ UA 10

For BRIDGE mode operation, the signal source should be connected to the balanced /unbalanced inputs of channel 1 only. This mode combines power output of both channels for connecting a single loudspeaker load. The combined loudspeaker load should not go to below 4 ohm.

Connect the line output of a mixer to a channel A input of the amplifier. Input can be wired as per fig.1 & 2 (Input Connections for Balanced and Unbalanced Mode) as mentioned in wiring information on page no. 6.

Connect a speaker system (8 ohm / 4 ohm) on the speakon output of channel 1 only. It is recommended to use the speakon connectors and wire these as per fig.4 (Output Connections for Bridge Mode) as mentioned in wiring information on page no. 6.

To select BRIDGE mode, keep the slide switch, provided at rear panel, in Bridge position.

The desired output levels of both the channels are adjustable by volume control of channel 1 only.

The level indicator LEDs glow to indicate the presence of signal at the output terminals.

Stereo Mix Plus Subwoofer Configuration

OFF

0.775V

XPA 40

IS 616/IEC 60065

R - 71003344

MADE IN INDIA

MONO BRIDGE

STEREO

FREQUENCY (Hz)

SENSITIVITY

CHANNEL B

Output Connections

BR Mode CH A only ST & MO Mode +1 = speaker +

SUB

LOW CUT

120

140

180

1.2V

WARRANTY VOIDS IF SERIAL NO. IS MISSING

MONO

BASS/BOOST

OFF

STEREO

For MONO or BRIDGE MODE use Input CHA.

INPUT

SUB

LOW

OFF

CUT

120

140

180

FREQUENCY (Hz)

BRIDGE

OFF ON

LIMITER

CHANNEL A

+1 = speaker +

-1 = speaker -

+2 = speaker -

C H A N N E L

OUTPUT

240V~/50Hz

30A, 6300W

MCB

PUSH TO RESET

C H A N N E L

16A

Output Connections

BR Mode CH A only ST & MO Mode +1 = speaker +

+1 = speaker +

-1 = speaker -

+2 = speaker -

C H A N N E L

BRIDGE

C H A N N E L

OUTPUT

GND

16A

240V~/50Hz

30A, 6300W

MCB

PUSH TO RESET

MADE IN INDIA

XPA 40

IS 616/IEC 60065

R - 71003344

SUB

LOW

OFF

CUT

120

140

180

FREQUENCY (Hz)

0.775V

1.2V

SENSITIVITY

CHANNEL B

WARRANTY VOIDS IF SERIAL NO. IS MISSING

OFF

MONO

BASS/BOOST

STEREO

For MONO or BRIDGE MODE use Input CHA.

INPUT

SUB

LOW

OFF

CUT

120

140

180

FREQUENCY (Hz)

BRIDGE

OFF ON

LIMITER

CHANNEL A

BRIDGE

GND

MONO BRIDGE

STEREO

1 2

4 5 6 7 8

Connect the left & Right outputs of the Audio mixing console to the respective inputs of the Active Crossover. Connect the Left & Right High frequency output of the active crossover to the respective input channels A & B of amplifier 1.

Inputs can be wired as per fig. 1 & 2 (Input Connections for Balanced & Unbalanced Mode).

AQ UA 10

Feed the Sub output signal of the crossover to channel A input of amplifier 2. Input can be wired as per fig. 1 & 2 (Input Connections for Balanced & Unbalanced Mode)

One no. of each of high powered subwoofer system can be connected to the channel A output of amplifier 2. Output speakon connectors can be wired as per fig. 4 (Output Connections for Bridge Mode).

One no. of full range loudspeaker system can be connected to each of the channels of amplifier 1.

The output speakon connectors should be wired as per fig. 3 (Output Connections for Stereo/Mono Mode) Amplifier 1 will be used in STEREO mode. Keep the slides switch of amplifier 1 in STEREO position.

Amplifier 2 will be used in bridge mode. Keep the slide switch of amplifier 2 to BRIDGE position to activate bridge mode.

Finally adjust the volume control of channel A & B in amplifier 1 to control the level of their respective position to get desired power. Also, adjust the volume control of channel A in amplifier 2 to control the levels of Sub out.

Stereo Mode: Cascade Configuration

XPA 40

MADE IN INDIA

XPA 40

MADE IN INDIA

IS 616/IEC 60065

R - 71003344

IS 616/IEC 60065

R - 71003344

Output Connections

BR Mode CH A only ST & MO Mode +1 = speaker +

SUB

LOW

OFF

CUT

120

140

180

FREQUENCY (Hz)

0.775V

1.2V

SENSITIVITY

CHANNEL B

WARRANTY VOIDS IF SERIAL NO. IS MISSING

BASS/BOOST

OFF

MONO

BRIDGE

STEREO

For MONO or BRIDGE MODE use Input CHA.

INPUT

OFF

FREQUENCY (Hz)

OFF ON

LIMITER

CHANNEL A

SUB

LOW CUT

120

140

180

+1 = speaker +

-1 = speaker -

+2 = speaker -

C H A N N E L

BRIDGE

C H A N N E L

OUTPUT

GND

16A

240V~/50Hz

30A, 6300W

MCB

PUSH TO RESET

MONO BRIDGE

STEREO

Output Connections

BR Mode CH A only ST & MO Mode +1 = speaker +

SUB

LOW

OFF

CUT

120

140

180

FREQUENCY (Hz)

0.775V

1.2V

SENSITIVITY

CHANNEL B

WARRANTY VOIDS IF SERIAL NO. IS MISSING

BASS/BOOST

OFF

MONO

BRIDGE

STEREO

For MONO or BRIDGE MODE use Input CHA.

INPUT

OFF

FREQUENCY (Hz)

OFF ON

LIMITER

CHANNEL A

SUB

LOW CUT

120

140

180

+1 = speaker +

-1 = speaker -

+2 = speaker -

C H A N N E L

BRIDGE

C H A N N E L

OUTPUT

GND

16A

240V~/50Hz

30A, 6300W

MCB

PUSH TO RESET

MONO BRIDGE

STEREO

1 2

4 5 6 7 8

Connect the left and Right outputs of the Audio mixing console to the channel A & B (XLR/jack) of amplifier 1. The XLR and jack inputs of the amplifier are in parallel. Either ones can be used.

Connect CH A jack input of amplifier 1 to CH A XLR/jack of amplifier 2. Similarly connect for CH B. Speakers can be connected to respective output but ensure that resultant impedance is not less than 2 ohms.

The input can be wired as per fig. 1 & 2 (Input Connections for Balanced and Unbalanced Mode) as mentioned in wiring information on page no. 6.

AQ UA 10

The speaker connections of amplifier 2 are done in a similar way as for amplifier 1.

Amplifier 1 & 2 will be used in STEREO mode. Keep the slide switch of amplifier 1 & 2 in STEREO position.

Adjust the volume controls of channel A & B of both the amplifiers to control the levels of their respective Speakers.

Finally any adjustments in the total quantity of the sound, if required, can be made from the audio mixing console.

Mono Mode - High Power Dual Channel Configuration

AMPLIFIER 2 (Mono Mode)

AMPLIFIER 1 (Mono Mode)

1 2

4 5 6 7 8

MADE IN INDIA

XPA 40

Output Connections

BR Mode CH A only ST & MO Mode +1 = speaker +

SUB

LOW

OFF

FREQUENCY (Hz)

0.775V

SENSITIVITY

CHANNEL B

IS 616/IEC 60065

R - 71003344

OFF

CUT

120

BASS/BOOST

140

OFF

180

FREQUENCY (Hz)

MONO

BRIDGE

OFF ON

1.2V

STEREO

CHANNEL A

For MONO or BRIDGE MODE use Input CHA.

INPUT

WARRANTY VOIDS IF SERIAL NO. IS MISSING

+1 = speaker +

SUB

-1 = speaker -

+2 = speaker -

LOW CUT

120

140

180

LIMITER

C H A N N E L

BRIDGE

C H A N N E L

OUTPUT

GND

16A

240V~/50Hz

30A, 6300W

MCB

PUSH TO RESET

LEFT

MONO BRIDGE

Output Connections

BR Mode CH A only ST & MO Mode +1 = speaker +

SUB

LOW

OFF

FREQUENCY (Hz)

0.775V

SENSITIVITY

CHANNEL B

IS 616/IEC 60065

R - 71003344

OFF

CUT

120

BASS/BOOST

140

OFF

180

FREQUENCY (Hz)

MONO

BRIDGE

OFF ON

1.2V

STEREO

CHANNEL A

For MONO or BRIDGE MODE use Input CHA.

INPUT

WARRANTY VOIDS IF SERIAL NO. IS MISSING

+1 = speaker +

SUB

-1 = speaker -

+2 = speaker -

LOW CUT

120

140

180

LIMITER

C H A N N E L

BRIDGE

C H A N N E L

OUTPUT

GND

16A

240V~/50Hz

30A, 6300W

MCB

PUSH TO RESET

STEREO

MONO BRIDGE

STEREO

AQ UA 10

BACK

1 2

4 5 6 7 8

AMPLIFIER 3 (Mono Mode)

MADE IN INDIA

XPA 40

SUB

OFF

120

180

FREQUENCY (Hz)

0.775V

SENSITIVITY

CHANNEL B

IS 616/IEC 60065

R - 71003344

SUB LOW CUT

140

1.2V

WARRANTY VOIDS IF SERIAL NO. IS MISSING

MONO

BASS/BOOST

OFF

STEREO

INPUT

BRIDGE

For MONO or BRIDGE MODE use Input CHA.

OFF

FREQUENCY (Hz)

OFF ON

LOW CUT

120

140

180

BRIDGE

LIMITER

CHANNEL A

OUTPUT

GND

240V~/50Hz

30A, 6300W

AMPLIFIER 4 (Mono Mode)

MADE IN INDIA

XPA 40

SUB

OFF

120

180

FREQUENCY (Hz)

0.775V

SENSITIVITY

CHANNEL B

IS 616/IEC 60065

R - 71003344

SUB LOW CUT

140

1.2V

WARRANTY VOIDS IF SERIAL NO. IS MISSING

MONO

BASS/BOOST

OFF

STEREO

INPUT

BRIDGE

For MONO or BRIDGE MODE use Input CHA.

OFF

FREQUENCY (Hz)

OFF ON

LOW CUT

120

140

180

BRIDGE

LIMITER

CHANNEL A

OUTPUT

GND

240V~/50Hz

30A, 6300W

Connect the left line output of the Audio mixing console to the channel A input (XLR/jack) of amplifier 1. The XLR & jack inputs of the amplifier are in parallel and either ones can be used.

Connect the unused channel A input ( jack/XLR) of amplifier 1 to the channel A input (XLR/jack) of amplifier 2. The jack & XLR inputs can be wired as per fig. 1 & 2 (Input Connections for Balanced and Unbalanced Mode) as mentioned on page no 6.

Output Connections

BR Mode CH A only ST & MO Mode +1 = speaker +

+1 = speaker +

-1 = speaker -

+2 = speaker -

C H A N N E L

16A

MCB

PUSH TO RESET

RIGHT

MONO BRIDGE

Output Connections

BR Mode CH A only ST & MO Mode +1 = speaker +

+1 = speaker +

-1 = speaker -

+2 = speaker -

C H A N N E L

16A

MCB

PUSH TO RESET

STEREO

MONO BRIDGE

STEREO

BACK

Keep the slide switch of amplifier 1 & 2 in MONO position.

Similarly, connect the Right line output of the Audio mixing console to the channel A input (XLR/jack) of amplifier 3. Also connect the unused channel A input (jack/XLR) of amplifier 3 to the channel A input (XLR/jack) of amplifier 4.

The Right speaker stack’s connections are done in a similar way as for left speaker stack’s connections. Amplifier 3 & 4 will also be used in MONO mode.

The Left speaker stack compromises of four nos. speaker systems. Each speaker is individually connected to the four speaker outputs available from amplifier 1 (channel A & B) & amplifier 2 (channel A & B). Output speakon connectors to be wired as per fig. 3 (Output Connections for Stereo/ Mono Mode). Amplifier 1 & 2 will be used in mono mode.

Adjust the volume controls of individual channels of four amplifier to control the levels of their respective speakers. Finally any adjustments in the total quality of the sound, if required, can be made from the audio mixing console.

Mono Mode + Subwoofer Configuration

SUB

OFF

120

FREQUENCY (Hz)

0.775V

XPA 40

MADE IN INDIA

IS 616/IEC 60065

R - 71003344

SENSITIVITY

CHANNEL B

LOW CUT

BASS/BOOST

140

OFF

MONO

STEREO

INPUT

For MONO or BRIDGE MODE use Input CHA.

180

1.2V

WARRANTY VOIDS IF SERIAL NO. IS MISSING

MONO BRIDGE

STEREO

BRIDGE

SUB

OFF

120

FREQUENCY (Hz)

OFF ON

LIMITER

CHANNEL A

Output Connections

BR Mode CH A only

ST & MO Mode +1 = speaker +

+1 = speaker +

-1 = speaker -

OUTPUT

240V~/50Hz

30A, 6300W

+2 = speaker -

16A

MCB

PUSH TO RESET

C H A N N E L

LOW

CUT

140

180

BRIDGE

GND

1 2

4 5 6 7 8

AQ UA 10

SUBWOOFER

Connect the left line output of audio mixing console to the channel input (XLR Jack) of amplifier. The XLR & Jack inputs of the amplifier are in parellal and either ones can be used.

The Jack & XLR inputs can be wired as per fig 1 & 2 (input connections for balanced and unbalanced mode) as mentioned on page no. 6.

connect a speaker system (8 ohm / 4 ohm) on the speakon / output binding post of each channel.

It is recommended to use the speakon connector and wire these as per fig 3 (output connection for stereo / mono mode)

Keep mode selection switch at MONO position.

keep channel 2 sub woofer / low cut switch at MID position ie. sub-woofer position.

Change frequency knob for sub woofer frequency as per your choice.

Adjust the individual volume controls of each channel on the front panel to obtain the desired output level.

The level indicator LEDs glow to indicate the presence of signal at the output terminals.

7. Block Diagram.

BRIDGE MODE

MONO/STEREO

MODE

CHANNEL A OUTPUT

CH A

TMS

CH B

CH A

MONO/STEREO

GND

BRIDGE

CH B OUTPUT

CH B

MONO/STEREO

GND

MONO/STEREO MODE

CHANNEL B OUTPUT

PSU

CIRCUIT

AMP 1

AMP 2

0-24V

0-23V

VOL. CONTROL

21V-0-21V

CONTROL CIRCUIT

EMC CIRCUIT

OFF

AUX

TRANSFORMER

CH A

CH B

8. Protections & Installations.

Thermal Protection

TMS (Thermal Management System)

Output Devices

Due to excessive heating of output devices, the thermal protection circuit brings the audio signal to mute state. Onset of thermal protection circuit is indicated by glowing of Mute LEDs (yellow) in each channel.

To restore normal operation conditions, it is recommended to switch off the amplifier and rectify the cause.

Transformer

Due to excessive heating of transformer, the thermal protection circuit brings the audio signal to mute state. Onset of thermal protection circuit is indicated by glowing of Mute LEDs (yellow) in each channel.

19” Rack Installation

The amplifier is designed for use in a standard 19” rack with height of 3U units.

In order to provide sufficient support base to the heavy amplifier, it is essential to use the 19” rack system with side support mounting also in addition to front screw mounting as shown in the figure below.

BASS BOOST

TMS

MUTE

CLIP

-3dB

-10dB

-20dB

CH B

SIG

XPA 40

POWER

To restore normal operation conditions, it is recommended to switch off the amplifier & rectify the cause.

DC, RFI Protection

Inbuilt circuitry is provided to protect the loudspeaker from any offset DC voltages. Also sufficient suppression filters at primary & secondary power supplies have been inbuilt, to overcome RF interferences.

Overload / Short Circuit Protection

Protection circuit is provided in both channels for the safety of output devices in case of overloading or mismatching of impedances at outputs.

Over Voltage Protection

Built in protection against mains over voltage supply. It is especially useful while operating amplifier on Genset. This avoids amplifier failure at higher mains.

Handle Fitting Instruction

Table Top Usage

The ‘U’ handles are helpful in easy portability of the amplifier for table top usage. Do not keep the set on an unstable stand or tripod.

BASS BOOST

TMS

MUTE

CLIP

-3dB

CH A

-10dB

-20dB

CH B

SIG

POWER

BASS BOOST

TMS

MUTE

CLIP

-3dB

CH A

-10dB

-20dB

CH B

SIG

POWER

A 40

Screw M5x10mm

(HRDBN458) 4 Nos.

Handle

(PVCIPC98) 2 Nos.

Note:- 1) Handles to be fitted on both sides as shown in diagram above.

2) Handle (PVCIPC98) 2 nos. & Screw M5x10 (HRDBN458) 4 nos. are included in packing.

9. Trouble Shooting:

Key to LED symbols:

Indication

1. Normal operation

BASS

TMS

MUTE

CILP

-3dB

-10dB

-20dB

SIGN

1. Normal operation with TMS LED ON

BASS

TMS

MUTE

CILP

-3dB

-10dB

-20dB

SIGN

1. The amplifier is in normal operation.

1.The amplifier is in normal operation. TMS LED shows gain is controlled due to increase in heatsink temperature.

GLOWING

BLINKING

Possible Reason

OFF

2. No power to the amplifier

BASS

TMS

MUTE

CILP

-3dB

-10dB

-20dB

SIGN

3. Low output

BASS

TMS

MUTE

CILP

-3dB

-10dB

-20dB

SIGN

1. The amplifier power switch may be off.

2. The amplifier may not be plugged into the power socket.

3. Confirm that the AC outlet works by plugging in another device.

4. If too many amplifiers are used on one outlet, the circuit breaker may trip and shut off power.

5. An overload in bridge mode may cause tripping of the circuit breaker on the rear panel.

6. An amplifier which keeps shutting off may have a serious internal fault. Turn it off, remove AC power cord and get the amplifier serviced by a qualified technician.

1. Check if the level of the input signal is too low.

2. Check if the signal source is operating & the input cable is intact.

3. The channel volume control setting is not at desired level.

4. No Sound

BASS

TMS

MUTE

CILP

-3dB

-10dB

-20dB

SIGN

5. No Sound

BASS

TMS

MUTE

CILP

-3dB

-10dB

-20dB

SIGN

6. Distorted Sound

BASS

TMS

MUTE

CILP

-3dB

-10dB

-20dB

SIGN

1. The amplifier goes in mute mode due to excessive input signal, speaker impedance mismatch or output short circuit.

2. Check the speaker impedance & speaker wiring for stray strands or breaks in the insulation.

3. Reduce the volume control, for desired output.

The amplifier goes in mute mode due to output short circuit, overloading or poor ventilation resulting into the rise in temperature either of the output devices or the power transformer. Switch off the amplifier to cool down. Check if the fan is working, proper ventilation is provided & output connections are as recommended.

To restore normal operation, turn down the volume control, power on the amplifier once and increase the volume control for desired output.

1. The input signal level may be too high. Turn down the amplifier level controls.

2. Check if the level of the input source. If it is high, reduce the input signal level.

The amplifier should never be operated at a level which causes the Clip LEDs to illuminate constantly.

8. Hum.

Move cabling and signal sources to identify the problems areas in the system. Cables with faulty shielding are a frequent entry point from hum. It occurs due to ground loops.

If the humming persists, kindly get in touch with our authorised service personnel.

9. Hiss.

Unplug the amplifier input to confirm whether the hiss is from the source or a device upstream. The erratic or popping noises indicate an electronic fault in the offending unit.

10. Technical Specification:

Model

Output power Stereo @ THD 0.1%

Bridged

EIA Power @ THD 0.1%

Single channel driven @ THD 0.1%

Frequency Response

THD + N @ rated power single channel in 4 Ω load

Damping Factor

Signal to Noise Ratio

Crosstalk

Input Sensitivity

Input Impedance

Protection devices

Input Connector (per channel)

Output Connector (per channel)

XPA 40

2Ω (2 x 2000W RMS)

4Ω (2 x 1400W RMS)

8Ω (2 x 850W RMS)

4Ω (4000W RMS)

8Ω (2800W RMS)

2Ω (2 x 3000W)

4Ω (2 x 2100W)

8Ω (2 x 1200W)

2Ω (2 x 2400 RMS)

4Ω (2 x 1600 RMS)

8Ω (2 x 950 RMS)

20Hz-20kHz (± 0.5dB)

< 0.5% @ 1kHz < 0.5% @ 20kHz

> 400 : 1 (@ 8 Ω)

> 90 dB.

>60 dB @ 1kHz

0.775V/1.2V Switchable

20kΩ balanced, 10kΩ unbalanced.

Temperature, DC, RFI, short circuit, Soft-Start, Overload, over voltage.

XLR, Jack stereo 6.3mm

4 WAY SPEAKON Connector with Binding post.

Cooling

Indicators (per channel)

Power Consumption Full Power (4Ω, Bridge mode)

Dimensions (W x D x H )

Net Weight

2 variable-speed High CFM Fans

Power On, Bass/Boost, TMS, Mute, Clip & Signal.

6300W

484 x 575 x 133mm

33 kg

For Your Records

● Model No..........................................................................................................................................

● Serial No...........................................................................................................................................

● Dealer’s Name..................................................................................................................................

● Dealer’s Phone No....................................Fax No...........................................................................

● Date of Purchase...............................................................................................................................

Note

Range of Studiomaster Professional Products.

Wired Microphones

SM 100XLR TRIO 100 SM 200XLR TRIO 200 SM 300I SM 400XLR SM 450XLR SM 500XLR SM 600XLR SM 650XLR SM 800C SM 900C SBM 10 Flex 3 Flex 4

Wireless Microphones

BR 28 Series BR 48 Series ER 11 Series ER 31 Series ER 58 Series TR 47 Series XR 20 Series XR 40 Series XR 80 Series XR 100 Series

Conference System

Vak 10 System Vak 10d / Vak 10c Vak 20

Crossovers

SX-2 SX-321 SX-341 SX-521

Processors

SEQ 152 SEQ 302F SEQ 312 / SEQ 341 Multi 3 / Multi 6 SFX 8 SPS 8 SDX 4 Phantom 11

Mixers

~ Cub Series

CUB 4 CUB 6 CUB 6U

~ Air Series

AiR 2 AiR 4 AiR 6 AiR 8 AiR 12 AiR 16 AiR 2U AiR 4U AiR 6U AiR 8U AiR 12U AiR 16U

Mixers

AiR Pro 18 AiR Pro 24 AiR Pro 28 AiR Pro 36

~ Air X Series AiR X 10

AiR X 14 AiR X 18

~ AQUA Series Aqua 6

Aqua 8 Aqua 10 Aqua 14

~ Digital Mixer

D. Mix 20

~ Diamond Club Series

Diamond Club 6.2 Diamond Club 8.2 Diamond Club 8.2 EFX Diamond Club 12.2 Diamond Club 12.2EFX Diamond Club 12.2U Diamond Club 12.2UX Diamond Club 16.2 Diamond Club 16.2EFX

~ Diamond Supreme Series

Diamond Supreme 12 Diamond Supreme 12U Diamond Supreme 16U

~ Club 2000 Series

C 142 C 182

~ Platinum Series

Platinum 16Fx

~ Diamond Pro-3 Series

Pro-3 12.3 Pro-3 16.3

~ DJ Mixers DJX 300 DJX 325 Playmix 300 DJX 825 DJX 925 DJX 975

Amplifiers

~ P - Series

PA 1.5 PA 2.0 PA 3.0 PA 4.5 PA 6.0 PA 7.5

~ DPA Series

DPA 2000 DPA 3200 DPA 4500 DPA 5000

~ DJA Series

DJA 100 DJA 500 DJA 800 DJA 1600 DJA 2500 DJA 3200 DJA 4000 DJA 5000

XJA 2600

~ Arena Series

Arena 20 Arena 30

~ Industrial Amplifier

ARC 120A ARC 240A ARC 120UB ARC 240UB

Speaker Component

~ S-Series

SWF 18120 SWF 18100 SWF 1880 SWF 1560 SMB 1565 SMB 1545 SMB 1530 SMB 1250 SMB 1230 SMB 1220 SHF 0104 SHF 0106 SHF 0210

~ E-Series

EMB 1225 EMB 1530 EMB 1535

~ TITAN Series

TWF 2115 TWF 1815 TWF 1811 TWF 1810 TWF 1580 TMB 1555 TMB 1535 THF 0208

~ FURY Series

F18.120 F15.70 F15.40 F15.50X F15.40X F12.30X

Passive Speakers

~ S-Series

S5225 S8018 S8118 S8128 S8028

~ Fire Series

Fire 21/ Fire 51 Fire 51A Fire 55

* Design and specification are subject to change without notice.

Passive Speakers

~ Fire Series

Fire 57 Fire 82 Fire 84

~ XVP Series

XVP 1225 XVP 1540 XVP 1540M XVP 1560 XVP 2250 XVP 2550 XVP 2585 XVP 25A2 XVP 25A6 XVP 1808 XVP 1810 XVP 1812 XVP 2820

~ ELAN Series ELAN 155

ELAN 181

EKS 151

Q 400

Powered Speaker

~ ARIA Series

Aria 8 Aria 12 Aria 15

~ A Series

A 400 A 500

H 400

~ B Series

B 200 B 400

~ OP Series

OP 415 OP 515

~ SUB Series

12SUB 15SUB

Line Array System

FIRE 92 SLA-40 T SLA-40 Kit SLA 30 S 9022

Stabilizers

SVC - S1000 SVC - S2000 SVC - S3000 SVC - S5000 SVC - S6000 SVC - S8000 SVC - S10000 SVC - S12000

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LITMAZF8. REV 0.

Studiomaster Professional XPA 40 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual