A-3548D
公共廣播放大器（緊急用）
A-3548D
A-3500D系列是一款具備緊急和優先廣播功能的公共廣播放大器，配備3組MIC/LINE輸入、1組MIC輸入、1組AUX（音樂來源）輸入及2通道喇叭區域選擇器，適用於在超級市場、學校、辦公室和工廠等進行廣播公告和背景音樂應用。
- TOA D類放大器，提供最高效率
- 4種可選擇的功率放大器輸出（60W、120W、240W 和 480W）
- 3組MIC/LINE選用輸入，1組MIC輸入和 1組AUX輸入
- 2頻道喇叭區域選擇器
- 可切換100V線路或低阻抗喇叭輸出
- 緊急與優先廣播
額定輸出
480 W
消耗功率
601 W (rated output), 113 W (based on EN62368), 200 mA or less (when power switch is OFF)
S/N比
88 dB or more (Master volume: min.)
76 dB or more (Master volume: max.)
55 dB or more (INPUT 1 to 4)
72 dB or more (INPUT 5)
(A-weighted)
76 dB or more (Master volume: max.)
55 dB or more (INPUT 1 to 4)
72 dB or more (INPUT 5)
(A-weighted)
音聲輸入
INPUT 1, 2: –60 dB* (MIC)/–20 dB* (LINE) selectable, 600 Ω, electronically-balanced, removable terminal block (3.81 mm, 5 pins)/ø6.3 mm phone jack (3P)
Note: MIC inputs are equipped with phantom power (24 V DC, ON/OFF switchable).
INPUT 3: –60 dB*, 600 Ω, electronically-balanced, ø6.3 mm phone jack (3P)
INPUT 4: –60 dB* (MIC)/–20 dB* (LINE) selectable, 600 Ω, electronically-balanced,ø6.3 mm phone jack (3P)
INPUT 5: –20 dB*, 10 kΩ, unbalanced, RCA pin jack x 2
PWR AMP IN: 0 dB*, 600 Ω, unbalanced, RCA pin jack
Note: MIC inputs are equipped with phantom power (24 V DC, ON/OFF switchable).
INPUT 3: –60 dB*, 600 Ω, electronically-balanced, ø6.3 mm phone jack (3P)
INPUT 4: –60 dB* (MIC)/–20 dB* (LINE) selectable, 600 Ω, electronically-balanced,ø6.3 mm phone jack (3P)
INPUT 5: –20 dB*, 10 kΩ, unbalanced, RCA pin jack x 2
PWR AMP IN: 0 dB*, 600 Ω, unbalanced, RCA pin jack
音聲輸出
SPEAKER OUT: Low impedance (4 - 16 Ω)/High impedance (DIRECT, ZONE 1/ZONE 2: 100 V/total 21 Ω), removable terminal block (6 pins) (ZONE 1/ZONE 2 is selectable, Max. 480 W per output)
REC OUT: 0 dB*, 600 Ω, unbalanced, RCA pin jack
LINE OUT 1, 2: 0 dB(*1), 600 Ω, unbalanced, RCA pin jack (Interlock with zone selection is possible)
REC OUT: 0 dB*, 600 Ω, unbalanced, RCA pin jack
LINE OUT 1, 2: 0 dB(*1), 600 Ω, unbalanced, RCA pin jack (Interlock with zone selection is possible)
音調調整
Bass: ±10 dB at 100 Hz
Treble: ±10 dB at 10 kHz
Treble: ±10 dB at 10 kHz
控制輸入
2 channels, no-voltage make contact input, open voltage: 35 V DC or less, short-circuit current: 10 mA or less, removable terminal block (5 pins)
ZONE CONTROL IN: No-voltage make contact input, open voltage: 35 V DC or less, short-circuit current: 10 mA or less, removable terminal block (4 pins)
ZONE CONTROL IN: No-voltage make contact input, open voltage: 35 V DC or less, short-circuit current: 10 mA or less, removable terminal block (4 pins)
控制輸出
POWER REMOTE OUT: Open collector output, withstand voltage: 30 V DC or less,
control current: 25 mA or less, removable terminal block (4 pins)
EMERGENCY OUT: Open collector output, withstand voltage: 30 V DC or less,
control current: 25 mA or less, removable terminal block (4 pins)
ZONE CONTROL OUT: Open collector output (polarized), withstand voltage: 30 V DC or less,
control current: 25 mA or less, removable terminal block (4 pins)
control current: 25 mA or less, removable terminal block (4 pins)
EMERGENCY OUT: Open collector output, withstand voltage: 30 V DC or less,
control current: 25 mA or less, removable terminal block (4 pins)
ZONE CONTROL OUT: Open collector output (polarized), withstand voltage: 30 V DC or less,
control current: 25 mA or less, removable terminal block (4 pins)
工作溫度
- 10 °C to +40 °C (14 °F to 104 °F)
工作濕度
85 %RH or less (no condensation)
外觀
Panel: ABS resin, black
Case: Surface-treated steel plate, black, paint
Case: Surface-treated steel plate, black, paint
尺寸
420 (W) x 96.1 (H) x 313.1 (D) mm (16.54" x 3.78" x 12.33")
附屬品
Power cord (2m (6.56 ft) x 1, Audio input removable terminal plug (3.81 mm, 5 pins) x 2, Control I/O removable terminal plug (3.81 mm, 4 pins) x 2, Remote control removable terminal plug (3.5 mm, 4 pins) x 1, Speaker out removable terminal plug (5 mm, 6 pins) x 1, Volume control cover x 4
選配品
Rack mounting bracket: MB-25B
Perforated panel: PF-013B
Perforated panel: PF-013B
(*1) 0 dB = 1V
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可選配件
The mixer amplifier shall use digital Class-D technology with active PFC (power factor correction) circuit to achieve a power output of 480 W and shall include 4 microphone inputs and 1 auxiliary input and switchable 100 V (21 Ω) line, or 4 - 16 Ω low impedance outputs.
Inputs 1 and 2 shall offer either electronically balanced 600 Ω MIC inputs or LINE inputs via a 5-pin removable terminal block or aφ6.3 mm phone jack. MIC Inputs 1 and 2 shall have the switchable option of 24 V DC phantom power.
Input 3 shall be fixed electronically balanced 600 Ω input via a φ6.3 mm phone jack. Input 4 shall be electronically balanced and selectable, offering MIC or LINE via a φ6.3 mm phone jack. Input 5 shall be fixed unbalanced 10 kΩ input via two RCA connectors. Power amplifier input shall also be available.
The mixer amplifier shall have two speaker output channels, a REC output, and two LINE outputs.
The device shall have an emergency priority that will broadcast at full volume regardless of the set value of the master volume controls.
The mixer amplifier shall have separate volume controls for each input channel and a master volume control that will adjust all input levels simultaneously.
There shall be a visual five-LED output level meter and visual LED indication of power, over current, thermal protection, emergency broadcast, and priority broadcast.
Power requirements shall be 100 - 240 V AC via a supplied power cord. The device shall have a frequency response of 50 Hz – 20 kHz with separate treble and bass controls located on the front panel.
The unit shall use 2 space units of a standard EIA component rack space and its dimensions shall be 420 (W) X 96.1 (H) X 313.1(D) mm (16.54" x 3.78" x 12.33"). Weight shall be 5.1 kg (11.24 lb.) and finished in black ABS resin front panel, with black surface-treated steel plate case.
Optional extras; Rack Mounting Bracket: MB-25B, Perforated Panel: PF-013B, manufactured by TOA Corporation.
Manufacturer: TOA Corporation
Model: A-3548D 4CE
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