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XPA U 358
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XPA U 358 New Pro

Eight Channel Low and High Impedance Amplifiers
35 Watts Per Channel

Key Features

35 watts rms output power per channel at 8 ohms, 4 ohms, or 70/100V
ENERGY STAR^® qualified amplifier
Extron Patented CDRS™ - Class D Ripple Suppression
Convection cooled, fanless operation - can be stacked without extra rack space for ventilation
New Eight channels in a 1U, half rack width enclosure - rack mount hardware included
New Defeatable auto-standby with fast wake up
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The Extron XPA U 358 is an ENERGY STAR qualified audio power amplifier delivering eight 35 watt channels in a half rack, 1U, convection cooled, plenum rated enclosure that includes rack mount hardware. The XPA U 358 delivers 35 watts into 8 or 4 ohms while the XPA U 358-70V delivers 35 watts into 70 volt systems and the XPA U 358-100V delivers 35 watts into 100 volt systems. The XPA U 358 offers unprecedented channel density and ability to install units without using rack spaces for ventilation, conserving precious rack space. It features a highly efficient advanced Class D amplifier design with power factor correction, ultra low inrush current, defeatable auto‑standby with fast wake up, and our patented CDRS – Class D Ripple Suppression.

XPA U 358

A&E Specifications

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XPA U 358

Provide a compact, energy efficient audio amplifier with low thermal dissipation that shall support eight analog inputs and eight amplified outputs with 35 watts rms per channel.
1. Compact stereo amplifier with 35 watts rms power output per channel and ENERGY STAR® qualification
  1. Input Requirements
    1. Shall support eight, balanced or unbalanced line level signals on four 5-pole, 3.5 mm captive screw connectors
    2. Shall support wiring of a mono source to adjacent odd/even input pairs for bridged output operation
  2. Output Requirements
    1. Shall support eight speaker level signals on four 4-pole, 5 mm screw-lock captive screw connector
    2. Shall provide 35 watts rms per channel into 4 or 8 ohms measured at 1 kHz with 0.1% THD
    3. Shall provide a signal-to-noise ratio of 100 dB measured from 20 Hz to 20 kHz, unweighted
    4. Shall support bridging of adjacent odd/even output pairs to provide 70 watts rms output power into 8 ohms
    5. Shall support a minimum load impedance of 8 ohms during bridged operation
    6. Shall provide a THD+N measurement of 0.1% measured at 1 kHz, at 3 dB below clipping
    7. Shall provide damping factor of greater than 100 at 8 ohms
  3. Amplifier Requirements
    1. Shall utilize an efficient Class D amplifier design
    2. Shall provide Class D Ripple Suppression technology
    3. Shall be convection cooled and operate without fans or vents
    4. Shall provide an automatic clip limiter to detect onset of clipping by comparing input and output waveforms and automatically reduce gain without audible artifacts to eliminate clipping distortion
    5. Shall provide multiple protection circuits that activate during output shorts, thermal overload, or DC faults
    6. Shall provide power factor correction technology to remove harmonic content on the AC power line
  4. Power Requirements
    1. Shall draw 52.6 watts during typical (1/8 power) operation with all output channels driven with 4 ohm loads
    2. Shall draw 50 watts during typical (1/8 power) operation with all output channels driven with 8 ohm loads
    3. Shall draw 8.5 watts during quiescent operation
    4. Shall provide a low power standby mode
      1. Shall enter standby mode after 25 minutes (+/- 5 minutes) of inactivity
      2. Shall draw less than 1 watt while in standby mode
      3. Shall return to full power status in less than 100 milliseconds upon signal detection while in standby mode
      4. Shall feature an input signal detection threshold of -65 dBu, +/- 3 dB on a balanced input to deactivate standby mode
    5. Shall be ENERGY STAR qualified
    6. Shall provide internal universal power supply with IEC power socket and support for international 100-240 VAC, 50/60 Hz standards
  5. Control Requirements
    1. Shall support remote standby control on one 2-pole, 3.5 mm captive screw connector
  6. Front Panel Requirements
    1. Shall provide an LED for power indication that lights green when the unit is receiving power and active, and lights amber when the unit is in standby mode
    2. Shall provide an LED for indication of the enclosure temperature exceeding the optimal value
    3. Shall provide green LEDs for input signal presence indication
    4. Shall provide red LEDs for indication of clip warning and protection circuit activation
  7. Rear Panel Requirements
    1. Shall provide eight inputs on four 5-pole, 3.5 mm captive screw connectors
    2. Shall provide eight outputs on four 4-pole, 5 mm screw-lock captive screw connectors
      1. Shall support 22 AWG to 12 AWG speaker cables
    3. Shall provide remote standby control port on one 2-pole, 3.5 mm captive screw connector that supports standby defeat with the insertion of included 10k ohm resistor
    4. Shall provide recessed, detented potentiometers with laser etched position indicators for attenuation adjustment
    5. Shall provide green LEDs for input signal presence indication
    6. Shall provide red LEDs for indication of clip warning and protection circuit activation
  8. General Requirements
    1. Shall be enclosed in a rack-mountable 1U, half rack width metal enclosure
    2. Shall meet regulatory compliances
      1. Shall meet safety compliances under CE, CEC, CISPR 22 Class B, C-tick, CUL, ENERGY STAR, European Code of Conduct, FCC Class B, ICES, RoHS, UL, UL 2043, VCCI Class B
      2. Shall be UL listed for plenum airspaces and meet UL 2043 compliance for heat and smoke release, when used with an optional Extron Flexible Conduit Adapter Kit
      3. Shall meet UL 60065, IEC 60065, and BSEN 60065 for safety
      4. Shall meet EMI/EMC compliances under CE, CISPR 22 Class B, C-tick, FCC Class B, ICES, and VCCI Class B
      5. Shall comply with appropriate requirements of ENERGY STAR, EU code of conduct, RoHS, and WEEE
    3. Shall provide three year parts and labor product warranty
    4. Shall provide seven year parts and labor power supply warranty
2. Approved device shall be the Extron XPA U 358, part number 60-1759-01; no alternates or equals.

XPA U 358

Provide a compact, energy efficient audio amplifier with low thermal dissipation that shall support eight analog inputs and eight amplified outputs with 35 watts rms per channel.
1. Compact stereo amplifier with 35 watts rms power output per channel and ENERGY STAR® qualification
  1. Input Requirements
    1. Shall support eight, balanced or unbalanced line level signals on four 5-pole, 3.5 mm captive screw connectors
    2. Shall support wiring of a mono source to adjacent odd/even input pairs for bridged output operation
  2. Output Requirements
    1. Shall support eight speaker level signals on four 4-pole, 5 mm screw-lock captive screw connector
    2. Shall provide 35 watts rms per channel into 4 or 8 ohms measured at 1 kHz with 0.1% THD
    3. Shall provide a signal-to-noise ratio of 100 dB measured from 20 Hz to 20 kHz, unweighted
    4. Shall support bridging of adjacent odd/even output pairs to provide 70 watts rms output power into 8 ohms
    5. Shall support a minimum load impedance of 8 ohms during bridged operation
    6. Shall provide a THD+N measurement of 0.1% measured at 1 kHz, at 3 dB below clipping
    7. Shall provide damping factor of greater than 100 at 8 ohms
  3. Amplifier Requirements
    1. Shall utilize an efficient Class D amplifier design
    2. Shall provide Class D Ripple Suppression technology
    3. Shall be convection cooled and operate without fans or vents
    4. Shall provide an automatic clip limiter to detect onset of clipping by comparing input and output waveforms and automatically reduce gain without audible artifacts to eliminate clipping distortion
    5. Shall provide multiple protection circuits that activate during output shorts, thermal overload, or DC faults
    6. Shall provide power factor correction technology to remove harmonic content on the AC power line
  4. Power Requirements
    1. Shall draw 52.6 watts during typical (1/8 power) operation with all output channels driven with 4 ohm loads
    2. Shall draw 50 watts during typical (1/8 power) operation with all output channels driven with 8 ohm loads
    3. Shall draw 8.5 watts during quiescent operation
    4. Shall provide a low power standby mode
      1. Shall enter standby mode after 25 minutes (+/- 5 minutes) of inactivity
      2. Shall draw less than 1 watt while in standby mode
      3. Shall return to full power status in less than 100 milliseconds upon signal detection while in standby mode
      4. Shall feature an input signal detection threshold of -65 dBu, +/- 3 dB on a balanced input to deactivate standby mode
    5. Shall be ENERGY STAR qualified
    6. Shall provide internal universal power supply with IEC power socket and support for international 100-240 VAC, 50/60 Hz standards
  5. Control Requirements
    1. Shall support remote standby control on one 2-pole, 3.5 mm captive screw connector
  6. Front Panel Requirements
    1. Shall provide an LED for power indication that lights green when the unit is receiving power and active, and lights amber when the unit is in standby mode
    2. Shall provide an LED for indication of the enclosure temperature exceeding the optimal value
    3. Shall provide green LEDs for input signal presence indication
    4. Shall provide red LEDs for indication of clip warning and protection circuit activation
  7. Rear Panel Requirements
    1. Shall provide eight inputs on four 5-pole, 3.5 mm captive screw connectors
    2. Shall provide eight outputs on four 4-pole, 5 mm screw-lock captive screw connectors
      1. Shall support 22 AWG to 12 AWG speaker cables
    3. Shall provide remote standby control port on one 2-pole, 3.5 mm captive screw connector that supports standby defeat with the insertion of included 10k ohm resistor
    4. Shall provide recessed, detented potentiometers with laser etched position indicators for attenuation adjustment
    5. Shall provide green LEDs for input signal presence indication
    6. Shall provide red LEDs for indication of clip warning and protection circuit activation
  8. General Requirements
    1. Shall be enclosed in a rack-mountable 1U, half rack width metal enclosure
    2. Shall meet regulatory compliances
      1. Shall meet safety compliances under CE, CEC, CISPR 22 Class B, C-tick, CUL, ENERGY STAR, European Code of Conduct, FCC Class B, ICES, RoHS, UL, UL 2043, VCCI Class B
      2. Shall be UL listed for plenum airspaces and meet UL 2043 compliance for heat and smoke release, when used with an optional Extron Flexible Conduit Adapter Kit
      3. Shall meet UL 60065, IEC 60065, and BSEN 60065 for safety
      4. Shall meet EMI/EMC compliances under CE, CISPR 22 Class B, C-tick, FCC Class B, ICES, and VCCI Class B
      5. Shall comply with appropriate requirements of ENERGY STAR, EU code of conduct, RoHS, and WEEE
    3. Shall provide three year parts and labor product warranty
    4. Shall provide seven year parts and labor power supply warranty
2. Approved device shall be the Extron XPA U 358, part number 60-1759-01; no alternates or equals.

XPA U 358-70V

Provide a compact, energy efficient audio amplifier with low thermal dissipation that shall support eight analog inputs and eight amplified outputs with 35 watts rms per channel into a 70 volt line.
1. Compact stereo amplifier with 35 watts rms power output per channel into a 70 volt line and ENERGY STAR® qualification
  1. Input Requirements
    1. Shall support eight, balanced or unbalanced line level signals on four 5-pole, 3.5 mm captive screw connectors
  2. Output Requirements
    1. Shall support eight high impedance speaker level signals on four 4-pole, 5 mm screw-lock captive screw connectors
    2. Shall provide 35 watts rms per channel into a 70 volt line measured at 1 kHz with 0.1% THD
    3. Shall provide a signal-to-noise ratio of 100 dB measured from 20 Hz to 20 kHz, unweighted
    4. Shall support a minimum load impedance of 143 ohms
    5. Shall provide a THD+N measurement of 0.1% measured at 1 kHz and 3 dB below clipping
    6. Shall provide damping factor of greater than 100 at 143 ohms
    7. Shall provide a selectable high pass filter for frequencies below 80 Hz with a 12 dB per octave rolloff
  3. Amplifier Requirements
    1. Shall utilize an efficient Class D amplifier design
    2. Shall provide Class D Ripple Suppression technology
    3. Shall be convection cooled and operate without fans or vents
    4. Shall provide an automatic clip limiter to detect onset of clipping by comparing input and output waveforms and automatically reduce gain without audible artifacts to eliminate clipping distortion
    5. Shall provide multiple protection circuits that activate during output shorts, thermal overload, or DC faults
    6. Shall provide power factor correction technology to remove harmonic content on the AC power line
  4. Power Requirements
    1. Shall draw 54.5 watts during typical (1/8 power) operation
    2. Shall draw 9.0 watts during quiescent operation
    3. Shall provide a low power standby mode
      1. Shall enter standby mode after 25 minutes (+/- 5 minutes) of inactivity
      2. Shall draw less than 1 watt while in standby mode
      3. Shall return to full power status in less than 100 milliseconds upon signal detection while in standby mode
      4. Shall feature an input signal detection threshold of -65 dBu, +/- 3 dB on a balanced input to deactivate standby mode
    4. Shall be ENERGY STAR qualified
    5. Shall provide internal universal power supply with IEC power socket and support for international 100-240 VAC, 50/60 Hz standards
  5. Control Requirements
    1. Shall support remote standby control on one 2-pole, 3.5 mm captive screw connector
  6. Front Panel Requirements
    1. Shall provide an LED for power indication that lights green when the unit is receiving power and active, and lights amber when the unit is in standby mode
    2. Shall provide an LED for indication of the enclosure temperature exceeding the optimal value
    3. Shall provide green LEDs for input signal presence indication
    4. Shall provide red LEDs for indication of clip warning and protection circuit activation
  7. Rear Panel Requirements
    1. Shall provide eight inputs on four 5-pole, 3.5 mm captive screw connectors
    2. Shall provide eight outputs on four 4-pole, 5 mm screw-lock captive screw connectors
      1. Shall support 22 AWG to 12 AWG speaker cables
    3. Shall provide remote standby control port on one 2-pole, 3.5 mm captive screw connector that supports standby defeat with the insertion of included 10k ohm resistor
    4. Shall provide recessed, detented potentiometers with laser etched position indicators for attenuation adjustment
    5. Shall provide a 2-pole, 3.5 mm captive screw connector for selecting a high pass filter to roll off frequencies below 80 Hz
    6. Shall provide green LEDs for input signal presence indication
    7. Shall provide red LEDs for indication of clip warning and protection circuit activation
  8. General Requirements
    1. Shall be enclosed in a rack-mountable 1U, half rack width metal enclosure
    2. Shall meet regulatory compliances
      1. Shall meet safety compliances under CE, CEC, CISPR 22 Class B, C-tick, CUL, ENERGY STAR, European Code of Conduct, FCC Class B, ICES, RoHS, UL, UL 2043, VCCI Class B
      2. Shall be UL listed for plenum airspaces and meet UL 2043 compliance for heat and smoke release, when used with an optional Extron Flexible Conduit Adapter Kit
      3. Shall meet UL 60065, IEC 60065, and BSEN 60065 for safety
      4. Shall meet EMI/EMC compliances under CE, CISPR 22 Class B, C-tick, FCC Class B, ICES, and VCCI Class B
      5. Shall comply with appropriate requirements of ENERGY STAR, EU code of conduct, RoHS, and WEEE
    3. Shall provide three year parts and labor product warranty
    4. Shall provide seven year parts and labor power supply warranty
2. Approved device shall be the Extron XPA U 358-70V, part number 60-1759-02; no alternates or equals.

XPA U 358-70V

Provide a compact, energy efficient audio amplifier with low thermal dissipation that shall support eight analog inputs and eight amplified outputs with 35 watts rms per channel into a 70 volt line.
1. Compact stereo amplifier with 35 watts rms power output per channel into a 70 volt line and ENERGY STAR® qualification
  1. Input Requirements
    1. Shall support eight, balanced or unbalanced line level signals on four 5-pole, 3.5 mm captive screw connectors
  2. Output Requirements
    1. Shall support eight high impedance speaker level signals on four 4-pole, 5 mm screw-lock captive screw connectors
    2. Shall provide 35 watts rms per channel into a 70 volt line measured at 1 kHz with 0.1% THD
    3. Shall provide a signal-to-noise ratio of 100 dB measured from 20 Hz to 20 kHz, unweighted
    4. Shall support a minimum load impedance of 143 ohms
    5. Shall provide a THD+N measurement of 0.1% measured at 1 kHz and 3 dB below clipping
    6. Shall provide damping factor of greater than 100 at 143 ohms
    7. Shall provide a selectable high pass filter for frequencies below 80 Hz with a 12 dB per octave rolloff
  3. Amplifier Requirements
    1. Shall utilize an efficient Class D amplifier design
    2. Shall provide Class D Ripple Suppression technology
    3. Shall be convection cooled and operate without fans or vents
    4. Shall provide an automatic clip limiter to detect onset of clipping by comparing input and output waveforms and automatically reduce gain without audible artifacts to eliminate clipping distortion
    5. Shall provide multiple protection circuits that activate during output shorts, thermal overload, or DC faults
    6. Shall provide power factor correction technology to remove harmonic content on the AC power line
  4. Power Requirements
    1. Shall draw 54.5 watts during typical (1/8 power) operation
    2. Shall draw 9.0 watts during quiescent operation
    3. Shall provide a low power standby mode
      1. Shall enter standby mode after 25 minutes (+/- 5 minutes) of inactivity
      2. Shall draw less than 1 watt while in standby mode
      3. Shall return to full power status in less than 100 milliseconds upon signal detection while in standby mode
      4. Shall feature an input signal detection threshold of -65 dBu, +/- 3 dB on a balanced input to deactivate standby mode
    4. Shall be ENERGY STAR qualified
    5. Shall provide internal universal power supply with IEC power socket and support for international 100-240 VAC, 50/60 Hz standards
  5. Control Requirements
    1. Shall support remote standby control on one 2-pole, 3.5 mm captive screw connector
  6. Front Panel Requirements
    1. Shall provide an LED for power indication that lights green when the unit is receiving power and active, and lights amber when the unit is in standby mode
    2. Shall provide an LED for indication of the enclosure temperature exceeding the optimal value
    3. Shall provide green LEDs for input signal presence indication
    4. Shall provide red LEDs for indication of clip warning and protection circuit activation
  7. Rear Panel Requirements
    1. Shall provide eight inputs on four 5-pole, 3.5 mm captive screw connectors
    2. Shall provide eight outputs on four 4-pole, 5 mm screw-lock captive screw connectors
      1. Shall support 22 AWG to 12 AWG speaker cables
    3. Shall provide remote standby control port on one 2-pole, 3.5 mm captive screw connector that supports standby defeat with the insertion of included 10k ohm resistor
    4. Shall provide recessed, detented potentiometers with laser etched position indicators for attenuation adjustment
    5. Shall provide a 2-pole, 3.5 mm captive screw connector for selecting a high pass filter to roll off frequencies below 80 Hz
    6. Shall provide green LEDs for input signal presence indication
    7. Shall provide red LEDs for indication of clip warning and protection circuit activation
  8. General Requirements
    1. Shall be enclosed in a rack-mountable 1U, half rack width metal enclosure
    2. Shall meet regulatory compliances
      1. Shall meet safety compliances under CE, CEC, CISPR 22 Class B, C-tick, CUL, ENERGY STAR, European Code of Conduct, FCC Class B, ICES, RoHS, UL, UL 2043, VCCI Class B
      2. Shall be UL listed for plenum airspaces and meet UL 2043 compliance for heat and smoke release, when used with an optional Extron Flexible Conduit Adapter Kit
      3. Shall meet UL 60065, IEC 60065, and BSEN 60065 for safety
      4. Shall meet EMI/EMC compliances under CE, CISPR 22 Class B, C-tick, FCC Class B, ICES, and VCCI Class B
      5. Shall comply with appropriate requirements of ENERGY STAR, EU code of conduct, RoHS, and WEEE
    3. Shall provide three year parts and labor product warranty
    4. Shall provide seven year parts and labor power supply warranty
2. Approved device shall be the Extron XPA U 358-70V, part number 60-1759-02; no alternates or equals.

XPA U 358-100V

Provide a compact, energy efficient audio amplifier with low thermal dissipation that shall support eight analog inputs and eight amplified outputs with 35 watts rms per channel into a 100 volt line.
1. Compact stereo amplifier with 35 watts rms power output per channel into a 100 volt line and ENERGY STAR® qualification
  1. Input Requirements
    1. Shall support eight, balanced or unbalanced line level signals on four 5-pole, 3.5 mm captive screw connectors
  2. Output Requirements
    1. Shall support eight high impedance speaker level signals on four 4-pole, 5 mm screw-lock captive screw connectors
    2. Shall provide 35 watts rms per channel into a 100 volt line measured at 1 kHz with 0.1% THD
    3. Shall provide a signal-to-noise ratio of 100 dB measured from 20 Hz to 20 kHz, unweighted
    4. Shall support a minimum load impedance of 286 ohms
    5. Shall provide a THD+N measurement of 0.1% measured at 1 kHz and 3 dB below clipping
    6. Shall provide damping factor of greater than 100 at 286 ohms
    7. Shall provide a selectable high pass filter for frequencies below 80 Hz with a 12 dB per octave rolloff
  3. Amplifier Requirements
    1. Shall utilize an efficient Class D amplifier design
    2. Shall provide Class D Ripple Suppression technology
    3. Shall be convection cooled and operate without fans or vents
    4. Shall provide an automatic clip limiter to detect onset of clipping by comparing input and output waveforms and automatically reduce gain without audible artifacts to eliminate clipping distortion
    5. Shall provide multiple protection circuits that activate during output shorts, thermal overload, or DC faults
    6. Shall provide power factor correction technology to remove harmonic content on the AC power line
  4. Power Requirements
    1. Shall draw 55.7 watts during typical (1/8 power) operation
    2. Shall draw 9.6 watts during quiescent operation
    3. Shall provide a low power standby mode
      1. Shall enter standby mode after 25 minutes (+/- 5 minutes) of inactivity
      2. Shall draw less than 1 watt while in standby mode
      3. Shall return to full power status in less than 100 milliseconds upon signal detection while in standby mode
      4. Shall feature an input signal detection threshold of -65 dBu, +/- 3 dB on a balanced input to deactivate standby mode
    4. Shall be ENERGY STAR qualified
    5. Shall provide internal universal power supply with IEC power socket and support for international 100-240 VAC, 50/60 Hz standards
  5. Control Requirements
    1. Shall support remote standby control on one 2-pole, 3.5 mm captive screw connector
  6. Front Panel Requirements
    1. Shall provide an LED for power indication that lights green when the unit is receiving power and active, and lights amber when the unit is in standby mode
    2. Shall provide an LED for indication of the enclosure temperature exceeding the optimal value
    3. Shall provide green LEDs for input signal presence indication
    4. Shall provide red LEDs for indication of clip warning and protection circuit activation
  7. Rear Panel Requirements
    1. Shall provide eight inputs on four 5-pole, 3.5 mm captive screw connectors
    2. Shall provide eight outputs on four 4-pole, 5 mm screw-lock captive screw connectors
      1. Shall support 22 AWG to 12 AWG speaker cables
    3. Shall provide remote standby control port on one 2-pole, 3.5 mm captive screw connector that supports standby defeat with the insertion of included 10k ohm resistor
    4. Shall provide recessed, detented potentiometers with laser etched position indicators for attenuation adjustment
    5. Shall provide a 2-pole, 3.5 mm captive screw connector for selecting a high pass filter to roll off frequencies below 80 Hz
    6. Shall provide green LEDs for input signal presence indication
    7. Shall provide red LEDs for indication of clip warning and protection circuit activation
  8. General Requirements
    1. Shall be enclosed in a rack-mountable 1U, half rack width metal enclosure
    2. Shall meet regulatory compliances
      1. Shall meet safety compliances under CE, CEC, CISPR 22 Class B, C-tick, CUL, ENERGY STAR, European Code of Conduct, FCC Class B, ICES, RoHS, UL, UL 2043, VCCI Class B
      2. Shall be UL listed for plenum airspaces and meet UL 2043 compliance for heat and smoke release, when used with an optional Extron Flexible Conduit Adapter Kit
      3. Shall meet UL 60065, IEC 60065, and BSEN 60065 for safety
      4. Shall meet EMI/EMC compliances under CE, CISPR 22 Class B, C-tick, FCC Class B, ICES, and VCCI Class B
      5. Shall comply with appropriate requirements of ENERGY STAR, EU code of conduct, RoHS, and WEEE
    3. Shall provide three year parts and labor product warranty
    4. Shall provide seven year parts and labor power supply warranty
2. Approved device shall be the Extron XPA U 358-100V, part number 60-1759-12; no alternates or equals.

XPA U 358-100V

Provide a compact, energy efficient audio amplifier with low thermal dissipation that shall support eight analog inputs and eight amplified outputs with 35 watts rms per channel into a 100 volt line.
1. Compact stereo amplifier with 35 watts rms power output per channel into a 100 volt line and ENERGY STAR® qualification
  1. Input Requirements
    1. Shall support eight, balanced or unbalanced line level signals on four 5-pole, 3.5 mm captive screw connectors
  2. Output Requirements
    1. Shall support eight high impedance speaker level signals on four 4-pole, 5 mm screw-lock captive screw connectors
    2. Shall provide 35 watts rms per channel into a 100 volt line measured at 1 kHz with 0.1% THD
    3. Shall provide a signal-to-noise ratio of 100 dB measured from 20 Hz to 20 kHz, unweighted
    4. Shall support a minimum load impedance of 286 ohms
    5. Shall provide a THD+N measurement of 0.1% measured at 1 kHz and 3 dB below clipping
    6. Shall provide damping factor of greater than 100 at 286 ohms
    7. Shall provide a selectable high pass filter for frequencies below 80 Hz with a 12 dB per octave rolloff
  3. Amplifier Requirements
    1. Shall utilize an efficient Class D amplifier design
    2. Shall provide Class D Ripple Suppression technology
    3. Shall be convection cooled and operate without fans or vents
    4. Shall provide an automatic clip limiter to detect onset of clipping by comparing input and output waveforms and automatically reduce gain without audible artifacts to eliminate clipping distortion
    5. Shall provide multiple protection circuits that activate during output shorts, thermal overload, or DC faults
    6. Shall provide power factor correction technology to remove harmonic content on the AC power line
  4. Power Requirements
    1. Shall draw 55.7 watts during typical (1/8 power) operation
    2. Shall draw 9.6 watts during quiescent operation
    3. Shall provide a low power standby mode
      1. Shall enter standby mode after 25 minutes (+/- 5 minutes) of inactivity
      2. Shall draw less than 1 watt while in standby mode
      3. Shall return to full power status in less than 100 milliseconds upon signal detection while in standby mode
      4. Shall feature an input signal detection threshold of -65 dBu, +/- 3 dB on a balanced input to deactivate standby mode
    4. Shall be ENERGY STAR qualified
    5. Shall provide internal universal power supply with IEC power socket and support for international 100-240 VAC, 50/60 Hz standards
  5. Control Requirements
    1. Shall support remote standby control on one 2-pole, 3.5 mm captive screw connector
  6. Front Panel Requirements
    1. Shall provide an LED for power indication that lights green when the unit is receiving power and active, and lights amber when the unit is in standby mode
    2. Shall provide an LED for indication of the enclosure temperature exceeding the optimal value
    3. Shall provide green LEDs for input signal presence indication
    4. Shall provide red LEDs for indication of clip warning and protection circuit activation
  7. Rear Panel Requirements
    1. Shall provide eight inputs on four 5-pole, 3.5 mm captive screw connectors
    2. Shall provide eight outputs on four 4-pole, 5 mm screw-lock captive screw connectors
      1. Shall support 22 AWG to 12 AWG speaker cables
    3. Shall provide remote standby control port on one 2-pole, 3.5 mm captive screw connector that supports standby defeat with the insertion of included 10k ohm resistor
    4. Shall provide recessed, detented potentiometers with laser etched position indicators for attenuation adjustment
    5. Shall provide a 2-pole, 3.5 mm captive screw connector for selecting a high pass filter to roll off frequencies below 80 Hz
    6. Shall provide green LEDs for input signal presence indication
    7. Shall provide red LEDs for indication of clip warning and protection circuit activation
  8. General Requirements
    1. Shall be enclosed in a rack-mountable 1U, half rack width metal enclosure
    2. Shall meet regulatory compliances
      1. Shall meet safety compliances under CE, CEC, CISPR 22 Class B, C-tick, CUL, ENERGY STAR, European Code of Conduct, FCC Class B, ICES, RoHS, UL, UL 2043, VCCI Class B
      2. Shall be UL listed for plenum airspaces and meet UL 2043 compliance for heat and smoke release, when used with an optional Extron Flexible Conduit Adapter Kit
      3. Shall meet UL 60065, IEC 60065, and BSEN 60065 for safety
      4. Shall meet EMI/EMC compliances under CE, CISPR 22 Class B, C-tick, FCC Class B, ICES, and VCCI Class B
      5. Shall comply with appropriate requirements of ENERGY STAR, EU code of conduct, RoHS, and WEEE
    3. Shall provide three year parts and labor product warranty
    4. Shall provide seven year parts and labor power supply warranty
2. Approved device shall be the Extron XPA U 358-100V, part number 60-1759-12; no alternates or equals.

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