Soundavo PSA-1250V Manuale utente

OWNERS MANUAL

PSA-1250VCOMMERCIAL

MULTI-ZONE AMPLIFIER

WARNING

1. Do not place or install this device in an area where it can be exposed to excessive amounts of

dust, humidity, oil,smoke, or combustible vapors.

2. To prevent risk of electrical shock or ﬁre hazard, due to overheating do not obstruct unit’s

ventilation openings.

3. Do not install near any source of heat, including other units that may produce heat.

4. Do not expose this device to excessively high temperatures. Do not place it in, on, or near heat

sources, such as a ﬁreplace, stove, radiator, etc. Do not leave it in direct sunlight

5. Do not touch the device, the power cord, or any other connected cables with wet hands.

6. This device ventilates excessive heat through the slots and openings in the case. Do not block

or cover these openings. Ensure that the device is in an open area where it can get sucient

airﬂow to keep from overheating.

7. Only clean unit with a dry cloth.

8. Unplug unit during lightning storms or when not used for an extended period of time.

9. Protect the power cord from being walked on or pinched, particularly at the plugs.

10. Use unit only with accessories speciﬁed by the manufacturer.

11. Refer all servicing to qualiﬁed personnel.

Thank you for purchased Soundavo product. Please read this

entire manual before using this device, paying extra attention to

these safety warnings and guidelines. Please keep this manual in

a safe place for future reference.

FRONT PANEL

The PSA-1250V is a 6 Zones (12 Channels) audio distribution amp that can be confgured for six stereo 4

Ohm/8 Ohm zones (30W/channel @ 8 Ohms; 60W/channel @ 4 Ohms); but it can also be conﬁgured

for six stereo 70/100V zones (120W/per Zone); or three high powered bridged zones(120W @ 8

Ohms). It also can be conﬁgured for any combination of stereo 4 Ohms/8 Ohms, 8 Ohms bridged and

70/100V zones all at the same time. Which is a versatile multi-channel ampliﬁer provide the good

solution for either residential or the 70V/100V contractor/install applications, and perfect for the

distribution of multiple speaker systems over long cable runs, such as in-ceiling speakers, surface-mount

speakers and paging horns.

INTRODUCTION

2 3

THERMAL PROTECTION

PSA-1250V ampliﬁeris designed withspecialcircuitry to safeguard theampliﬁer underathermal

overload condition. Thermalprotectionmode willonly engage when theunithasbeen runat high

volume for extended periods of timewithoutadequate ventilationand/or when speaker impedances

are below the minimum levels for the ampliﬁer. In thermalprotection modetheampliﬁer will

automaticallystop output. If this fault occurs,turn o the ampliﬁer, andcheck thatthespeaker

impedance ratingis abovethe minimumrating. Alsocheck for adequate ventilationaroundthe

ampliﬁerandmake adjustments if necessary. Once the unit has cooledto sageoperating

temperatures,the ampliﬁer may be powered back on.Special circuitry has been designed into the

amplifier to safeguard under a short-circuit condition. Afaulty speaker can also cause a short circuit

condition.

INSTALLATION

The ampliﬁer canbe placed on ashelfin an equipment rack, or on atableor cabinet.Be sure the

required clearances for ventilationand heatdissipation.The ampliﬁerwilltake two rackspaces

withthefeet removed.

Volume controls for each zone (Stereo Left/Right channels

or Bridge Mono mode) adjust the sound level

independently (Counterclockwise for minimum; clockwise

for maximum.) This allows the output level of each speaker

to be perfectly matched to its area. It can also be used to

limit the maximum audio level in a certain area.

3. Gain Controls:1. Power Switch:

This switch turns the AC mains On or OFF

2. Zone LED:

Blue: the corresponding zone is powered on

OFF: the corresponding zone is o (standby mode).

REAR PANEL

4. Audio Bus Input/Output: The PSA-1250V ampliﬁer

has a BUS input that receives audio signals from

standard balanced audio sources via plug-in screw

terminal connector that can be used to connect a single

source to multiple zones switched to BUS using the

Line/Bus Switch. The BUS output are passive pass

through the corresponding of the BUS Input and can

be used to daisy chain the source to other ampliﬁers in

the system.

5. Local Line Input RCA Connector: Local input for

zone (plays only on that speciﬁc zone’s outputs). Use

for instances where the zone will always play a dierent

source than other zones. Set the Zone Input Selector

switch to “Line In” to use this input.

6. 4Ω/8ΩZone Speaker Output Terminal:

Stereo 4Ω/8ΩMode - Use indicated terminals for

normal stereo speaker connections. (2 x 30W @ 8

Ohms; 2 x 60W @ 4 Ohms)

NOTE 1: 4Ω/8Ω- 70V/100V switch must be in the "4

Ω/8Ω" position

NOTE 2: The Stereo/Bridged switch must be in the

OUT (Stereo) position.

Bridge 8ΩMode - Use indicated terminals for high

output mono speaker connection. (1 x 120W @ 8

Ohms)

NOTE 1: 8Ω/4Ω- 70V/100V switch must be in the "4

Ω/8Ω" position.

NOTE 2: The Stereo/Bridged switch must be in the IN

(Bridged) position.

7. Hi-Z Zone Speaker Output Terminal:

70V/100V Mode - Use indicated terminals for

70V/100V stereo speaker connections. (120W @

70V/100V)

NOTE 1: 8Ω/4Ω- 70V/100V switch must be in the

“70V/100V" position.

NOTE 2: 70V/100V High Voltage Speaker Output

Switch must be set to proper voltage.

NOTE 3: The Stereo/Bridged switch must be in the

OUT (Bridged) position.

8. Line/Bus Switch: Each Zone's input source can be

selected using this switch. Depress the button to select

the audio programcoming from the BUS Input or leave

it in the up position to use the Zone's Line Input.

9. 4Ω/8Ω& 70V/100V Switch: Select the zone

speaker output between 4Ω/8Ωand 70V/100V

10. Line Input Mode Switch: Select whether a pair of

left and right output channels are individual or bridged

together for a more powerful mono channel, the

Bridge Output mode is ideal for powering larger

speakers or speakers on long cable runs.

Stereo: For stereo signals, leave switch in the OUT

(Stereo) position. This applies to all connections in the

4 ohm / 8 ohm conﬁguration.

Bridge: ONLY press this button when using the

"Bridged 8 Ohm" or "70/100V mode" speaker wiring

connection in a giving zone.

CAUTION: In Bridge mode, an ampliﬁer encounters a

load that is about one half of its actual value a 4-ohm

load would therefore be 2-ohms to a bridged amp and

if the ampliﬁer isn't designed to run Safely into such a

low impedance (which the PSA-1250V is not) damage

may occur tothe ampliﬁer. We do not recommend

connecting a 70V Speaker circuit while in Bridge

mode as the output will be at 140V and the sound can

be distorted.

11. Zone Audio Limiter: Press to activates a -20dB

input limiter, for the speciﬁc zone, to help reduce the

level of accidental audio peaks and clipping distortion

by zone. Leave in the OUT position to pass audio

through unprocessed. Press IN to actiate the input

limiter.

12. Voltage Switch: The unit is set at the factory for 115V

U.S. operation; simply connect the included IEC power

cord to your wall outlet. For 230V operation, move the

voltage selector switch to the 230V position. When

operating at 230V the internal fuse located in the IEC

socket should also be changed. In most 230V

applications a separate power cord will be required and

is not included.

13. AC Input: Apply the correct voltage before operate

the ampliﬁer, use the supplied 3-pin ground power

cable to connect the unit.

FUSE - For 110V-120V/60Hz use a T10.0AL/250V fuse.

For 220V-240V/50Hz use a T5.0AL/250V fuse.

7 9

1210 114 85

4. Audio Bus Input/Output: The PSA-1250V ampliﬁer

has a BUS input that receives audio signals from

standard balanced audio sources via plug-in screw

terminal connector that can be used to connect a single

source to multiple zones switched to BUS using the

Line/Bus Switch. The BUS output are passive pass

through the corresponding of the BUS Input and can

be used to daisy chain the source to other ampliﬁers in

the system.

5. Local Line Input RCA Connector: Local input for

zone (plays only on that speciﬁc zone’s outputs). Use

for instances where the zone will always play a dierent

source than other zones. Set the Zone Input Selector

switch to “Line In” to use this input.

6. 4Ω/8ΩZone Speaker Output Terminal:

Stereo 4Ω/8ΩMode - Use indicated terminals for

normal stereo speaker connections. (2 x 30W @ 8

Ohms; 2 x 60W @ 4 Ohms)

NOTE 1: 4Ω/8Ω- 70V/100V switch must be in the "4

Ω/8Ω" position

NOTE 2: The Stereo/Bridged switch must be in the

OUT (Stereo) position.

Bridge 8ΩMode - Use indicated terminals for high

output mono speaker connection. (1 x 120W @ 8

Ohms)

NOTE 1: 8Ω/4Ω- 70V/100V switch must be in the "4

Ω/8Ω" position.

NOTE 2: The Stereo/Bridged switch must be in the IN

(Bridged) position.

SPECIFICATIONS

FEATURES:

• Each zone can independently select a zone-speciﬁc

stereo audio source or the global mono Audio Bus input

(balanced)

• Each zone can be independently conﬁgured for stereo 4

Ohm/8 Ohm mode, high powered bridged 8 Ohm

mode, or 70V/100V mode for total ﬂexibility within a

given installation

• Stereo Mode (4 Ohm) per Zone: 2 x 60W THD 0.8%

• Stereo Mode (8 Ohm) per Zone: 2 x 30W THD 0.8%

• Bridged Mono Mode (8 ohms) per Zone: 120W W THD 0.8%

• 70/100V Mode per Zone: 120W

• Total Harmonic Distortion: 1%

• Signal-to-Noise Ratio: -95dB

• Channel Separation: -60 dB

• Frequency Response: 20Hz---20KHz 1.5dB

• Input Sensitivity: 380mV

• Line Input Impedance: 47K

• Dimensions: 16.81”W x 3.46” H x 16.14”D (42.7 x 8.8 x 41.0 cm)

• Weight: 43 lbs (19.25 kg)

7. Hi-Z Zone Speaker Output Terminal:

70V/100V Mode - Use indicated terminals for

70V/100V stereo speaker connections. (120W @

70V/100V)

NOTE 1: 8Ω/4Ω- 70V/100V switch must be in the

“70V/100V" position.

NOTE 2: 70V/100V High Voltage Speaker Output

Switch must be set to proper voltage.

NOTE 3: The Stereo/Bridged switch must be in the

OUT (Bridged) position.

8. Line/Bus Switch: Each Zone's input source can be

selected using this switch. Depress the button to select

the audio programcoming from the BUS Input or leave

it in the up position to use the Zone's Line Input.

9. 4Ω/8Ω& 70V/100V Switch: Select the zone

speaker output between 4Ω/8Ωand 70V/100V

10. Line Input Mode Switch: Select whether a pair of

left and right output channels are individual or bridged

together for a more powerful mono channel, the

Bridge Output mode is ideal for powering larger

speakers or speakers on long cable runs.

Stereo: For stereo signals, leave switch in the OUT

(Stereo) position. This applies to all connections in the

4 ohm / 8 ohm conﬁguration.

Bridge: ONLY press this button when using the

"Bridged 8 Ohm" or "70/100V mode" speaker wiring

connection in a giving zone.

CAUTION: In Bridge mode, an ampliﬁer encounters a

load that is about one half of its actual value a 4-ohm

load would therefore be 2-ohms to a bridged amp and

if the ampliﬁer isn't designed to run Safely into such a

low impedance (which the PSA-1250V is not) damage

may occur tothe ampliﬁer. We do not recommend

connecting a 70V Speaker circuit while in Bridge

mode as the output will be at 140V and the sound can

be distorted.

11. Zone Audio Limiter: Press to activates a -20dB

input limiter, for the speciﬁc zone, to help reduce the

level of accidental audio peaks and clipping distortion

by zone. Leave in the OUT position to pass audio

through unprocessed. Press IN to actiate the input

limiter.

12. Voltage Switch: The unit is set at the factory for 115V

U.S. operation; simply connect the included IEC power

cord to your wall outlet. For 230V operation, move the

voltage selector switch to the 230V position. When

operating at 230V the internal fuse located in the IEC

socket should also be changed. In most 230V

applications a separate power cord will be required and

is not included.

13. AC Input: Apply the correct voltage before operate

the ampliﬁer, use the supplied 3-pin ground power

cable to connect the unit.

FUSE - For 110V-120V/60Hz use a T10.0AL/250V fuse.

For 220V-240V/50Hz use a T5.0AL/250V fuse.

• Each zone has -20dB Audio Limiter

• Front panel features “Zone ON” and “Zone Standby”

LED indicators for each zone

• Rack mountable in standard 19" rack (2U height)

• Selectable 110/220 AC voltage

INSTALLATION

4. If the cabinet contains other heat generating components or several PSA-1250V’s are

being used, be sure to provide adequate ventilation to dissipate heat the units can

generate.

2. The PSA-1250V is designed for mounting into standard 19" (483mm) racks or on fat

horizontal surfaces.

3. If mounted in an equipment cabinet or other confining location, allow at least 2 inches of

space above the top cover. Be sure there are large openings in the shelf below the unit and

in the cabinet to allow the entry of cool air and the escape of warm air.

1. The PSA-1250V is convection cooled. It depends on the natural free fow of air up

through the slot perforations in the bottom plate, over the internal heat dissipating fins, then

out the top cover, for adequate cooling.

7. Be sure to leave adequate space for large bundles of wire and dress them in such a

manner that does not block airflow. Leave enough ‘play’ in the wires for making connections

should the system require service.

6. When installing the PSA-1250V in a rack, please use racks that feature a rear support

provision. Adding a single RU (Rack Unit) vent above and below the PSA-1250V will

improve convection in heavy use applications. [One Rack Unit size = 1-3/4" (44.5mm) in

height]. Also try to mount the amplifier(s) at the top of the rack so heat dissipation does not

affect other devices.

5. Use fans (quiet, boxer type), if necessary, to ensure a constant fow of air through the

PSA-1250V’s and the other heat generating components.

Typical System application for the PSA-1250V audio distribution amplifier. The amp

can be set for any combination of high-power bridged, normal 8 /4 or 70/100V

zones. All zones can select local or Bus sources and can be controlled via the

source select switch on the rear panel.

Stereo Zone

Stereo Bridged Zone

Medium Power 4/8 Speakers

High Power 8 Speakers

70/100V Speakers

70/100V Zone

Audio

Source

Audio

Source

Bus Audio Source

Audio

Source

Audio

Source

Audio

Source

Audio

Source

Bus Out to

other

Audio Device

TYPICAL PSA-1250V SYSTEM APPLICATION

AUDIO CONNECTION

Zone Line In

This connection is an input for a dedicated zone

line-level audio source. If multiple line level audio

sources are required in a zone, use an audio

switch on the zone Line IN or use a multi-source,

multi- zone controller if multiple audio sources are

required in multiple zones.

Audio Bus In

This connection will distribute unbalanced line

level audio to any zone set to ‘Bus’ with the Line/

Bus Trigger IN.

NOTE: This is a mono unbalanced line level input.

If connecting a stereo line level device, use an

appropriate stereo to mono ‘Y’ adapter as shown

when making this connection.

1. IN - Connect the RCA to bare wire adapter to

the Audio Bus IN +/GND terminals as shown.

2. Connect the Audio Bus IN Source to the RCA

adapter. Use a stereo to mono adapter if

connecting a stereo source.

NOTE: Polarity of RCA plugs/jacks is typically pin

= signal, sleeve =GND.

Audio Bus Out

This connection will send the unbalanced line level

audio source connected to the Audio Bus IN to the

Audio Bus IN on another PSA-1250V or other audio

amplifier.

1. OUT - Using either the RCA adapter or bare

wire, connect the Audio Bus OUT +/GND

terminals on PSA-1250V #1 to the Audio Bus IN

+/GND terminals on PSA-1250V #2. Use an RCA

to bare wire adapter if connecting to a device

with line level RCA jacks.

NOTE: Polarity of RCA plugs/jacks is typically pin = signal, sleeve =GND.

1. Line In: Using a quality, stereo audio RCA- RCA

patch cable with gold ends, connect the L&R line

level OUTs on the audio source to the L&R Line Ins

on the appropriate PSA-1250V zone.

The PSA-1250V is a fexible multi-channel amplifer capable of many different

applications. The application for a given system, or even different amp configurations for

different zones within a single system can create different requirements for speaker wire

runs. Please review the information below and apply these guidelines to your particular

application(s).

Speaker Wire

Multi-Room Audio -Stereo or Bridged (4/8 )Connection

Speaker Output Mode Selection

WIRING INFRASTRUCTURE

NEVER CHANGE THE 70V/100V HIGH VOLTAGE SPEAKER OUTPUT, 8 /4 -70V/ 100V

OR STEREO/BRIDGED SETTINGS WHILE THE AMP IS TURNED ON OR CONNECTED

TO AC POWER!!!

If the PSA-1250V amp is being used to distribute 70V/100V audio, pull distribution lines

(each distribution line is a wire pair) in a daisy-chain pattern, (amp to first speaker, first

speaker to second speaker, second speaker to third speaker, etc.) If distributing stereo, pull

two distribution lines (two pair) to each speaker location in a daisy chain from the amp

location. Use quality stranded speaker wire based upon the 70V Speaker Wire Gauge Table

below.

70V/100V Connection

The PSA-1250V has three amplifer modes for zone speaker connections. Bridged 8 Ohms,

4/8 Ohms Stereo and 70V/100V. Any mix of amplifier modes is allowable in differient

zones...as long as they are configured correctly.

If the PSA-1250V amp is being used to distribute audio from the PSA-1250V Zone Line

INs or Audio Bus IN, to different rooms with 4/8 Ohm speakers, with a multi-zone preamp/

controller then pull home-runs directly from the speaker locations or speaker terminal

plates to the amplifier location. Use quality stranded speaker wire based upon the 4/8

Speaker Wire Gauge Table below.

SPEAKER OUTPUT CONNECTIONS

70/100V Mode Speaker Output Application -

70V/100V speaker system are wired using a dsisy-chain configuration where the amp feeds a speaker, then

that speaker connects to the next speaker and so on.

When setting an PSA-1250V zone for 70V/ 100V, be sure to accurately calculate the total wattage required

and not exceed the PSA-1250V 70V/100V zone’s output, 30W per channel in 70V/100V mode.

Typically 70V amp power requirement can be calculated by adding the total of the tap wattage set for all

speakers to be connected to a 70V/ 100V zone and multiplying it by 1.2. This will allow roughly a 20% loss

of efficiency, typical for this type of system

1. Zone Line IN: Connect

the L & R line level OUT

on the zone audio source

to the appropriate zone

LINE IN L & R

2. Select Input Source:

Choose the Input source

betwen LINE & BUS

3. Stereo/Bridged Switch: Set to

the Bridged position.

4. 4 /8 or 70/100V Switch: Set

to the 70V/100V position.

5. Speaker Connections:

Connect the right 70V

distribution line +/- wires to the

right 70V/100V distribution line

+/- wires to the right 70V or

100V +/- terminals as shown

NOTE 1: Speaker terminals

may not be specifically marked

In/Out/

NOTE 2: In a 70/100V system

+/- polarity is not critical in

same way as in a 4/8 ohm

system. But it is critically

important that the connections

be consistent, that is, plus to

plus, minus to minus.

6. 70V/100V High Voltage Speaker

Output - wiring the speaker into the

70V connector if PSA-1250V AC

Voltage Select switch is set to

110~120VAC.

Set to 100V if PSA-1250V AC

Voltage Select switch is set to

220~240VAC. This setting will

affect all zones set to 70V/100V.

This configuration creates a stereo 70V speaker zone. (120W/zone) A70V/ 100V system utilizes speakers

with special taps that set the wattage/ volume of each speaker.

If the total wattage exceeds 120 Watts for a 70/100V zone, reducet the load to any given zone by

connecting 70V/100V speakers to multiple zones set to 70V/ 100V to safely distribute the load.

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