100V Line Amplifiers

Altronics’ 100V line amplifiers are designed to deliver reliable audio amplification for large-scale speaker systems and commercial sound installations. Ideal for public address systems, background music, paging applications, and multi-zone audio setups, these amplifiers provide an efficient way to distribute sound across extended areas. Suitable for businesses, schools, warehouses, hospitality venues, and public facilities, they support clear and consistent audio performance. Whether installing a new PA system or expanding an existing network, Altronics offers dependable 100V line amplifier solutions. Browse our range for professional audio products designed for flexible and effective sound distribution.

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Designed to meet the requirements of medium sized professional public address installations, delivering an output power of 100W RMS respectively.
A4043

Phase5 60 Watt 100V Public Address Amplifier

Designed to meet the requirements of medium sized professional public address installations, delivering 60W RMS output power.
Australian Made
$795.45
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Consists of 2 x 125 Watt amplifiers in a single chassis. Ideal for multi-zone 100V PA requirements. Manufactured in Australia to stringent engineering criteria, the Phase 5 amplifier series exhibit quite remarkable performance and outstanding reliability.
A4372

Phase5 Boost Public Address (PA) 2x125W Amplifier

Consists of 2 x 125 Watt amplifiers in a single chassis. Ideal for multi-zone 100V PA requirements. Manufactured in Australia to stringent engineering criteria, the Phase 5 amplifier series exhibit quite remarkable performance and outstanding reliability.
Australian Made
$1,453.64
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Engineered for professional PA installations, the A 4275C conservatively delivers 125W RMS power. Including three levels of input priority, bass and treble controls and phantom powering capability enable unparalleled flexibility for a wide scope of applications such as schools, shopping centres, workshops, mine sites and office buildings.
A4275C

Phase5 Public Address (PA) Mixer Amplifier 125W 6 Input

Engineered for professional PA installations, the Redback A 4275C conservatively delivers 125W RMS power. Including three levels of input priority, bass and treble controls and phantom powering capability enable unparalleled flexibility for a wide scope of applications such as schools, shopping centres, workshops, mine sites and office buildings.
Australian Made
$1,290.91
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Engineered for professional PA installations, the A 4285B conservatively delivers 250W RMS power. Including three levels of input priority, bass and treble controls and phantom powering capability enable unparalleled flexibility for a wide scope of applications such as schools, shopping centres, workshops, mine sites and office buildings.
A4285C

Phase5 Public Address (PA) Mixer Amplifier 250W 6 Input

Engineered for professional PA installations, the A 4285B conservatively delivers 250W RMS power. Including three levels of input priority, bass and treble controls and phantom powering capability enable unparalleled flexibility for a wide scope of applications such as schools, shopping centres, workshops, mine sites and office buildings.
Australian Made
$1,568.18
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Similar in functionality to the recently released A 4377/A4387 amplifiers with the addition of four 100V line output zones.
A4270

Public Address (PA) Mixer Amplifier 125W 100V 4 Zone

Similar in functionality to our popular A 4377A/A4387A amplifiers, with the addition of four 100V line output zones.
Australian Made
$1,268.18
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Similar in functionality to the recently released A 4377/A4387 amplifiers with the addition of four 100V line output zones.
A4280

Public Address (PA) Mixer Amplifier 250W 100V 4 Zone

Similar in functionality to our popular A 4377A/A4387A amplifiers with the addition of four 100V line output zones.
Australian Made
$1,540.91
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Similar in functionality to the recently released A 4377/A4387 amplifiers with the addition of four 100V line output zones.
A4280A

Public Address (PA) Mixer Amplifier 250W 100V 4 Zone

Similar in functionality to our popular A 4377A/A4387A amplifiers with the addition of four 100V line output zones.
Australian Made
NEW
$1,540.91
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This 125 Watt 3 channel mixer amplifier is specifically designed for applications requiring up to three microphone inputs, without compromising output power and overall performance. The amplifier feature three inputs which can be configured for either microphone or line level operation.
A4377A

Public Address Amplifier (PA) 125W 3 Input

This 125 Watt 3 channel mixer amplifier is specifically designed for applications requiring up to three microphone inputs, without compromising output power and overall performance. The amplifier features three inputs which can be configured for either microphone or line level operation.
Australian Made
$1,086.36
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This 250 Watt 3 channel mixer amplifier is specifically designed for applications requiring up to three microphone inputs, without compromising output power and overall performance. The amplifier feature three inputs which can be configured for either microphone or line level operation.
A4387A

Public Address Amplifier (PA) 250W 3 Input

This 250 Watt 3 channel mixer amplifier is specifically designed for applications requiring up to three microphone inputs, without compromising output power and overall performance. The amplifier feature three inputs which can be configured for either microphone or line level operation.
Australian Made
$1,177.27
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Designed for applications requiring up to six microphone inputs, without compromising output power and overall performance. Each model features inputs which can be configured for either microphone or line level operation.
A4389

Public Address Amplifier (PA) 250W 6 Input

Designed for applications requiring up to six microphone inputs, without compromising output power and overall performance. Each model features inputs which can be configured for either microphone or line level operation.
Australian Made
$1,272.73
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Compact amplifier featuring Dante connectivity provides the latest technology for digital ready PA systems while offering the flexibility of 150W 100V line or 2x75W stereo operation.
A4226

150W 100V/Stereo Class-D PA Amplifier With Dante & DSP

Compact amplifier featuring Dante connectivity and in-built DSP, provides the latest technology for digital ready PA systems while offering the flexibility of 150W 100V line or 2x75W stereo operation.
NEW
$1,000.00
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A staple of the Redback range since we first started, the 30W amplifier meets the requirements of small to medium public address installations.
A4024A

30W 3 Input 100V Public Address (PA) Amplifier

A longstanding staple of the Redback range, the 30W amplifier meets the requirements of small to medium public address installations.
Australian Made
NEW
$436.36
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A staple of the Redback range since we first started, the 30W amplifier meets the requirements of small to medium public address installations. Rack mount version of Redback A 4024A.
A4026A

30W 3 Input 100V Public Address (PA) Amplifier Rack Mount

A staple of the Redback range since we first started, the 30W amplifier meets the requirements of small to medium public address installations. Rack mount version of Redback A 4024A.
Australian Made
NEW
$477.27
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This 60W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
A4218

60W Public Address (PA) Zone Amplifier

This 60W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
$526.36
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This 2 x 60W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
A4219

2 x 60W Public Address (PA) Zone Amplifier

This 2 x 60W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
$631.82
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This 120W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
A4220

120W Public Address (PA) Zone Amplifier

This 120W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
$631.82
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This 2 x 120W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
A4221

2 x 120W Public Address (PA) Zone Amplifier

This 2 x 120W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
$768.18
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This 240W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
A4222

240W Public Address (PA) Zone Amplifier

This 240W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
$753.64
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This 2 x 240W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
A4223

2 x 240W Public Address (PA) Zone Amplifier

This 2 x 240W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
$895.45
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This 480W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
A4224

480W Public Address (PA) Zone Amplifier

This 480W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
$895.45
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A pair of rack ears suitable for mounting a single Redback A42XX zone PA amplifier into a 1RU rack space.
H5192

19 Inch Rack Mount Ears For Single A42XX Amplifier

A pair of rack ears suitable for mounting a single Redback A42XX zone PA amplifier into a 1RU rack space.
$14.50
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A pair of rack ears suitable for mounting two Redback A42XX zone PA amplifiers into a 1RU rack space.  Includes 2 rack ears and 8 mounting screws. 
H5193

19 Inch Rack Mount Ears For Two A42XX Amplifiers

A pair of rack ears suitable for mounting two Redback A42XX zone PA amplifiers into a 1RU rack space.  Includes 2 rack ears and 8 mounting screws.
NEW
$14.50
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This 2 x 480W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
A4225

2 x 480W Public Address (PA) Zone Amplifier

This 2 x 480W PA zone amplifier developed by Redback, allows installers to mix and match amplifiers within a 1RU 19” rack space.
$1,086.36
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Designed for applications requiring up to six microphone inputs, without compromising output power and overall performance. Each model features inputs which can be configured for either microphone or line level operation.
A4379

Public Address Amplifier (PA) 125W 6 Input

Designed for applications requiring up to six microphone inputs, without compromising output power and overall performance. Each model features inputs which can be configured for either microphone or line level operation.
$1,136.36
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These compact 1RU rack mount ampliers are suitable for both stand alone PA system use, or as zone ampliers in larger systems requiring local inputs. All models operate on 240V ac or 24V dc for battery backup operation.
A4240A

Compact 1RU Public Address 100V Amplifier 60W

These compact 1RU rack mount ampliers are suitable for both stand alone PA system use, or as zone ampliers in larger systems requiring local inputs. All models operate on 240V ac or 24V dc for battery backup operation.
Australian Made
$604.55
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