TOA W-912A UL 6-Channel In-Wall Mixer and Power Amplifier, 120W

The TOA W-912A Mixer Power Amplifier controls and mixes up to six independent input signals plus two inputs with use of an expanding kit WE-2. The W-912A delivers up to 120 watts of output power. 21 optional accessory modules are available to allow the W-912A amplifier to be configured for a variety of applications. Edge connectors on the rear of the units permit TOA modules to be easily inserted for use.

Modules include the M Series microphone preamplifiers, available with muting, remote volume control, voice gate and compressor options. The U Series auxiliary preamplifiers, available with muting, remote volume control and compressor options. The B Series bridging transformers, available with muting option, the L Series line matching transformers, available with muting option, the S Series signal generator modules and the I-01S Exes interface paging module. Also available are the T-01S module featuring 600Ω balanced output capability and the T-02S module featuring auxiliary input and balanced line output for music-on-hold.

The W-912A Mixer Power Amplifier has a built-in one-octave graphic equalizer with 9 bands to tailor sound system frequency response to room acoustics, reducing feedback tendencies and improving intelligibility. A built-in compressor circuit is provided to protect the output level from distortion as a result of excessive input and keep it constant. The compressor’s threshold level can be adjusted.

The W-912A Mixer Power Amplifier has output terminals to match 4- or 8Ω speaker systems, or a speaker distribution system may be connected to the 25 or 70-volt terminals. User’s (blank) space is provided for additional functions to be made by the customers. The expanding kit (optional) may be loaded in this space when the number of inputs is increased. Protection against tampering is assured by means of a keylocked hinged door.

The W-912A can be mounted in any four-inch wall with use of the BX-9F Flush Mounting Back Box. Wall mounting is also possible with use of the BX-9S Surface Mounting Box.

Features

• 6-Channel Mixer Power Amplifier
• Expandable to 8-input
• Output Power: 120W
• Wide Frequency Response: 30Hz - 20kHz ±1dB
• Low Distortion and Noise
• Excellent Output Regulation
• Built-in One-Octave Equalizer
• Built-in Compressor
• Self-Protection Circuitry Design
• Separate Output Terminals: 4 and 8Ω, 25 and 70 volts
• Extra Space for Customizing
• LED Pilot Light
• LED Peak Indicator
• Full Range of Plug-in Modules
• Flush and Surface Mounting

Specifications

• Output Power: 120 W RMS
• Power Bandwidth:
  • (D) 20 to 20.000HZ, 0.5% THD
  • (T) 50 to 20,000Hz, 0.5% THD
• Frequency Response:
  • (D) 30 to 20,000Hz +/-1dB
  • (T) 30 to 15,000Hz +/-1dB
  • (T) :50 to 20,000Hz +/-1dB, —2dB
• Total Harmonic Distortion: 0.02% at 1kHz, Rated Output
• Input: Six Input Ports; 100mV / 10kΩ
  • Each port accepts any input module except T—015. (Use T—01S only in port #5 or #6)
• One Bridging Input/Output: 100mV / 3.3kΩ
• Outputs:
  • (T) 8Ω, 25V 8: 70V, Balanced
  • (D) 4Ω, Unbalanced
• Output Regulation: (1kHz)
  • (D) Less Than 0.5 dB, No Load to Full Load
  • (T) Less Than 1.0 dB, No Load to Full Load
• S/N Ratio:
  • Band Pass: 20 to 20,000Hz
  • Controls OFF; 90dB
  • Equalizer IN; 88dB
  • Master Volume Max.; 77dB
  • Compressor IN; 84dB
• Compression
  • Attack Time: No Greater Than 2msec.
  • Compression Range: 30dB
  • Release Time: Variable 20msec. to 2 sec
  • Distortion: Less Than 1%
• Equalization
  • 9 band, One octave Graphic Equalizer
  • Center Frequencies ; ISO 63, 125, 250, 500, 1k, 2k, 4k, 8k, 16kHz
  • Equalization Range: +/-12 dB
• Filters
  • High—pass Filter ; 180Hz, 12dB / octave
  • Low—pass Filter ; 7kHz, 12dB / octave
• Indicators
  • 1 LED Power Indicator
  • 1 LED Peak Indicator
• Protection Circuitry: BuiIt-in with 2AC Fuse (1 inside) and 1 Output Circuitry; Output Circuitry Protection when Heatsink Temperature Overheats
• Connectors
  • Input #1 to #6: Card—edge Connector
  • Output: Screw—terminal strip
  • Bridging Input/Output: Screw—terminal Strip
  • Mute: Screw-terminal strip
• Power Requirement: 120VAC, 60Hz
• Power Consumption: 180W
• Size (WxHxD) ; 101.6 (4') x 60.3 (2.4") x 95.3 (3.8")mm
  • Color: Silver
  • Accessories: Volume Control Cover x 3 pcs
  • Associated Equipment
    • PIug—in Modules for Input ; M—01S, U—01S, B—01S. L—01S, I—O1S
    • PIug—in Modules for Input with MUTE ; U—11S, U—128, B—11S, L—11S, M—11S
    • PIug—in Modules for Input with Remote Volume Control Facility ; M—21S, U—21S
    • PIug—in Modules for Line Output ; T—01S
    • PIug—in Modules for Tone Signal ; 8—015, 5—028, 5—035
    • Volume Control Cover ; YA—910
    • Expanded Kit ; WE—2
  • Note) (D) : Direct Output, (T) :Transformer Output
  • Power Bandwidth and Frequency Response are from input port to power amplifier output.