Audio AT-MX351a （5路智能會議混音器）

SKU: 14447 Category: Others Tags: broadcast, cable, conferencing, control, controller, head, headphone, Home recording studio, limiter, meeting, microphone, mixer, monitor, mount, phantom, phone, power, preamp, processor, sound, xlr, 家用錄音

Description

AT-MX351a SmartMixer 是由微處理器控制，可作自動切換的5通道音訊混音器。4通道咪高峰輸入端為標準的平衡式XLRF卡農母頭，第2及第3接點帶48V幻象供電。
配置有以RCA蓮花插座的AUX輔助輸入端子，可連接外部音訊設備的線路電平信號，該輔助輸入不會作信號處理。輸出端是標準的平衡式XLRM卡農公頭。

所有AT-MX351型號和AT-MX341型號的自動混音器，能經附帶的 AT8325/1.0連接線，以後面板的專用端子，把多台混音器作菊鏈串接，作更多通道的混音輸入。傳輸線載有自動混音器之間的控制匯流排和音訊訊號。多台自動混音器以此方式連接，就如同單一自動混音器上操作一般。因此；在其中一台自動混音器上啟動咪高峰，將導致整個系統功能切換至適當的操作。由於每台自動混音器均為獨立供電，基本上並沒有菊鏈連接混音器數目的限制。

使用說明 (英語) | 使用說明 (中文)

AT-MX351a 産品規格

輸入阻抗	咪高峰: 8,000 Ω / 線路: 50,000 Ω / 輔助輸入: 50,000 Ω / 串聯輸入: 20,000 Ω
輸出阻抗	平衡: 線路–200 Ω, 咪高峰–300 Ω / 不平衡: 400 Ω / 串聯輸出: 100 Ω / 前級輸出: 750 Ω
最大輸入電平	咪高峰: -24 dBV 線路: +27 dBV 輔助輸出: +17 dBV
最大輸出電平	+22 dBm
額定輸出電平	平衡：咪高峰-46dBm（600Ω）及-44dBV（無負載）；線路 +4dBm（600Ω）及+4.4dBV（無負載）；不平衡：-10dBV（無負載）
耳筒輸出	700 mW, 20 Ω 負載
最大增益	73 dB
頻率響應	40 Hz ~ 22 kHz
固有噪音	-128 dBV (150Ω) 於最高增益
輸入衰減	10 dB
咪高峰/綫路輸入衰減	50 dB
最大NOMA衰減	≈20 dB (同時使用100個咪高峰)
幻象供電	+48V DC
控制電壓輸出	+4V DC
供電	100V~240V 交流，50/60Hz，30W
工作環境溫度	0°C ~ 40°C
重量	3.35 kg
尺寸	430.0mm X 238.0mm X 44.0mm (長 X 寬 X 高)
配套件	交流供電線，AT8325/1.0 串接連線，機架安裝件，防護安全蓋

Four automatic Mic/Line inputs, plus Aux in
Automatic threshold setting
48V phantom power individually selectable for each channel
Limiters on each mic channel prevent individual channel overload
Balanced inputs and output, selectable Mic/Line-level
Individual gain controls for each channel
Switchable manual mode overrides automatic functions
Master output level control
Pre- or post-controller audio outputs from Mic/Line channels
Off attenuation for each input adjustable to -40 dB
Sub-D connector for TTL output, plus closure-control input for external control of each channel
NOMA operation provided, can be turned on/off
Output level meter with Peak and RMS modes
Monitor headphone output with adjustable level
Internal AC supply
Mounts in a single 19″ rack space
Includes rack mount adapters

The AT-MX351a automatic mixer is ideal for meetings, seminars, teleconferencing, worship services, courtroom proceedings, radio and TV broadcasting and A/V applications.
All switching is under microprocessor control with proprietary algorithms for instant, seamless operation. An individual priority pre-select switch for each mic/line channel allows choice of one-channel-at-a-time operation, all active, or any mix of moderator override.
The last microphone on stays on so that ambient sound is never muted. Plus, any number of SmartMixers can be linked to create a system for large multi-mic installations. The priority control system extends throughout the entire chain.

AT-MX351a Specifications

Input Impedance	Mic: 8,000 ohms / Line: 50,000 ohms / Aux: 50,000 ohms / Link In: 20,000 ohms
Output Impedance	Balanced: Line–200 ohms, Mic–300 ohms / Unbalanced: 400 ohms / Link Out: 100 ohms / Preamp Out: 750 ohms
Maximum Input Level	Mic: -24 dBV Line: +27 dBV Aux: +17 dBV
Maximum Output Level	+22 dBm
Nominal Output Level	Balanced Line: +4 dBm (600 ohms), +4.4 dBV (open circuit) Mic: -46 dBm (600 ohms), -44 dBV (open circuit) Unbalanced: -10 dBV (open circuit) Preamp Out: -10 dBV (open circuit)
Headphone Output	700 mW, 20 ohm load
Maximum Gain	73 dB
Frequency Response	40 Hz to 22 kHz
Equivalent Input Noise	-128 dBV (150 ohms) at maximum gain
Input Attenuation	10 dB
Mic/Line Input Pads	50 dB
Maximum NOMA Attenuation	≈20 dB (up to 100 mics on simultaneously)
Phantom Power Requirements	+48V DC
Control Voltage Out	+4V DC
Power Supply	100V-240V AC, 50-60 Hz, 30W
Operating Temperature Range	32°F to 104°F
Weight	3.35 kg
Dimensions	430.0mm X 238.0mm X 44.0mm (L X W X H)
Accessories (Optional)	AC power cable; AT8325/1.0 Link Cable; rack mount adapters; security caps