Shure SCM262は、マイクとコンシューマー向けステレオ機器を統合する拡声用途向けに設計されたステレオミキサーです。バランス型マイク入力が1つ、ライン入力も可能なバランス型マイク入力が1つ、ステレオAUXレベル入力が3つあります。
Shure SCM262は、レストラン、教室、企業研修、エアロビクスクラス、およびページング/広報システムをバックグラウンドミュージックやその他のプログラム素材と組み合わせる他の状況向けに設計されています。
特長:
- ページングとバックグラウンドミュージックを組み合わせるように設計
- アクティブバランス型XLRマイク入力チャンネル1つ
- アクティブバランス型XLRマイク入力と1/4インチTRSライン入力のチャンネル1つ
- ステレオ入力チャンネル3つ
- ステレオAUXレベル出力
- ステレオMIC/LINE出力
- マスター出力の低音と
Shure SCM262は、マイクとコンシューマー向けステレオ機器を統合する拡声用途向けに設計されたステレオミキサーです。バランス型マイク入力が1つ、ライン入力も可能なバランス型マイク入力が1つ、ステレオAUXレベル入力が3つあります。
Shure SCM262は、レストラン、教室、企業研修、エアロビクスクラス、およびページング/広報システムをバックグラウンドミュージックやその他のプログラム素材と組み合わせる他の状況向けに設計されています。
特長:
- ページングとバックグラウンドミュージックを組み合わせるように設計
- アクティブバランス型XLRマイク入力チャンネル1つ
- アクティブバランス型XLRマイク入力と1/4インチTRSライン入力のチャンネル1つ
- ステレオ入力チャンネル3つ
- ステレオAUXレベル出力
- ステレオMIC/LINE出力
- マスター出力の低音と
SCM262
立体声混音器
The Shure stereo microphone mixer, SCM262, user guide.
Version: 4 (2019-G)
Shure Incorporated
2/18
Table of Contents
SCM262立体声混音器 3
重要安全事项! 3
General Description 4
Features 4
Front Panel 4
Rear Panel 5
DIP Switches 6
Applications 7
General Application 7
Paging with Ducking Application 7
Jukebox Mute Application 8
Connections 8
内部修改 9
Internal Modifications 9
Disassembly 9
Supplied Hardware 11
Rackmount Installation 12
Stand-Alone Installation 13
Fixed Installation 13
规格 15
Voltage Gain (typical, controls full clockwise) 17
可替换配件 17
可选配附件 18
维修声明 18
认证 18
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SCM262
立体声混音器
重要安全事项!
必须阅读这些注意事项。
必须保留这些注意事项。
必须注意所有警告内容。
必须遵循所有注意事项。
不要在靠近水的地方使用本设备。
只能用干布擦拭设备。
不要堵塞任何通风口。留出足够的距离，确保充分通风，并安装在符合制造商要求的位置。
不要将本设备安装在任何热源（如明火、散热器、调温器、火炉或包括功率放大器在可的其它可能产生热量的装置附近。
不要将任何明火火源放置在产品上。
不要破坏带极性或接地类型插头的安全功能。极性插头带有两个插片，其中一个比另一个宽。接地类型插头带有两个插片
和第三个接地插脚。较宽的插片或第三个插脚是为安全目的设置的。如果提供的插头无法插入您的插座，请向电工咨询如
何更换合适的插座。
保护电源线防止被脚踩踏或被夹紧，尤其是在插头、方便插座和机身电源线的引出处。
只能使用制造商指定的连接部件/附件。
只能使用制造商指定的或随设备售出的手推车、支座、三角架、托架或支撑台。如果使用手推车，在移动装有设备的手推
车时应注意安全，避免设备翻落。
在雷电天气或长时间不使用情况下，应拔下设备插头。
所有维修均应由合格的维修人员执行。如果设备因下列情况损坏，应进行维修：电源线或插头损坏、液体泼溅到设备上或
异物进入设备，设备暴露在雨水或潮湿环境中而无法正常工作，或摔落到地上。
不要将本设备暴露在可能滴水和溅水的地方。不要将装有液体的容器（如花瓶等）放在本设备顶部。
电源插头或电器转接头应保持在随时可用的状态。
本装置的空气噪声不超过 70dB (A)。
应将符合 I 类标准的设备连接到带有接地保护装置的主电源插座。
为降低起火或电击危险，不要将本设备暴露在雨中或潮湿环境下。
不要尝试改装本产品。这样做会导致人身伤害和/或产品故障。
应在技术规格指定的温度范围内操作此产品。
这个符号表示本设备中存在可能导致触电的危险电压。
这个符号表示本设备附带的说明书中具有重要的操作和维护说明。
警告：本设备中的电压具有致命危险。设备内部没有用户可维修的部件。所有维修均应由合格的维修人员执行。如果改变了厂方
设置的工作电压，则安全合格证书不再适用。
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General Description
The Shure Model SCM262 is a stereo mixer intended for sound reinforcement applications that integrate microphones with
consumer stereo products. It incorporates two active-balanced microphone inputs with three unbalanced stereo aux level
inputs.
The SCM262 Stereo Mixer is designed for restaurants, classrooms, corporate training, aerobics classes, and other situations
where a paging/public announcement system is combined with background music or other program material.
Features
Designed to combine paging with background music
One active-balanced, XLR microphone input channel
One active-balanced XLR microphone and 1/4-in. TRS line input channel
Three STEREO INPUT channels
Stereo AUX level OUTPUTs
Stereo MIC/LINE OUTPUTs
BASS and TREBLE tone controls on the master output
1/2-rack chassis
12 V phantom power for condenser microphones
Internal power supply
Removable power cable
Ducking function (defeatable)
Jukebox mute function (defeatable)
Front Panel
① MIC Channel Gain Controls, 1-2.
Control the gain levels of the MIC channels and LINE IN 2 (MIC 2).
② STEREO Channel Gain Controls, 1-3.
Control the gain levels from CD players, juke boxes, VCRs, or other consumer stereo equipment connected to the STEREO
inputs.
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③ BASS and TREBLE Controls.
Control the boost/cut of the low- and high-frequency of the shelving filters.
④ MASTER Gain Control.
Allows adjustment of the overall output gain.
⑤ POWER Indicator.
Lights up to indicate when the unit is plugged in and receiving power.
The SCM262 does not have a power switch. To turn the unit off, unplug the power cord or use an external power strip with a switch. However, it can remain
plugged in as it uses very little power when idle.
⑥ POWER Switch.
Country dependent.
Rear Panel
① Power Connector.
Accepts 100-120 Vac (SCM262) or 220-240 Vac (SCM262E).
② Left/Right MIC/LINE Output Connectors.
These 1/4-in. connectors are stereo, balanced outputs for use with professional audio equipment. Controlled by DIP switch.
③ Left/Right AUX Output Connectors.
These phono jacks are stereo, unbalanced outputs for use with consumer stereo equipment.
④ DIP Switches.
These allow you to adjust the SCM262 for specific applications. See DIP Switches.
⑤ Left/Right STEREO INPUTS, 1-3.
These phono jacks are stereo inputs for connection to consumer stereo devices.
⑥ MIC Channel 2 INPUT.
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Microphone channel 2 has two available inputs. There is a 1/4-in. connector for balanced/unbalanced line-level
connections, or an XLR connector for balanced mic-level connections.
⑦ MIC Channel 1 INPUT.
This is an XLR connector for balanced mic-level connections.
DIP Switches
DIP SWITCH FUNCTION POSITION UP (default) POSITION DOWN
1 LEFT OUTPUT MIC/LINE Line Mic
2 RIGHT OUTPUT MIC/LINE Line Mic
3 MIC 1 DUCKING Off On
4 MIC 2 DUCKING Off On
5 DUCKING LEVEL –∞ -20 dB
6
STEREO 3 JUKEBOX
MUTE
Off On
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DIP SWITCH FUNCTION POSITION UP (default) POSITION DOWN
7 12 V PHANTOM Off On
LEFT/RIGHT OUTPUT MIC/LINE: DIP switches 1 and 2 adjust the left and right outputs for line- or mic-level operation.
MIC 1/MIC 2 Ducking: When ducking is on, the SCM262 will automatically lower the gain of all STEREO inputs when
someone is speaking into one of the microphones.
DUCKING LEVEL: Adjusts the amount of STEREO channel gain reduction when ducking is activated.
STEREO 3 JUKEBOX MUTE: This DIP switch turns the Juke Box Mute feature on or off. When on, any source connected to
STEREO 3 will mute STEREO 1 and 2 inputs.
PHANTOM POWER: When in the down position, this switch activates a 12 V phantom power source for condenser
microphones. Phantom power does not affect the operation of balanced, dynamic microphones, so one can be connected to
the SCM262 in combination with a condenser microphone.
Applications
General Application
This is a general setup for most situations which require the combined use of a professional microphone and consumer stereo
equipment. Using this general setup, there are several other options available for further adjusting the SCM262 for your sound
system. See the diagram on the facing page.
Turn all gain controls counterclockwise.
Connect L/R STEREO INPUTS of the SCM262 to the L/R stereo outputs of the desired stereo audio equipment (CD
players, VCRs, televisions, juke boxes, etc.).
Connect microphone(s) to the MIC INPUTS on the SCM262.
For microphones which require phantom power, such as condenser microphones, place DIP switch 7 in the down
position (phantom power on).
Connect the L/R outputs of the SCM262 to the L/R inputs of the amplifier.
Note: If you are using a consumer stereo amplifier, use the AUX OUTs. If you are using a professional audio power amplifier, use the LINE OUTs.
The MIC/LINE and AUX OUTPUTs can be used simultaneously to feed two separate amplifiers.
Apply power to the mixer by connecting the supplied power cable between the power connector on the mixer and the
appropriate AC power supply. The green POWER LED will illuminate to indicate that the mixer is powered on.
Note: The SCM262 has no power switch*. It is designed to be plugged into a power strip which supports the whole sound system. A typical power
strip will have a power switch, so that when the power strip is powered on, the SCM262 is powered on. (*Power Switch, country dependent).
Paging with Ducking Application
With Ducking on, the SCM262 will automatically sense when someone is talking into one of the microphones and lower the
volume of the music so the talker can be heard more clearly. Once the talker is finished, the music resumes.
Use a microphone with an ON/OFF or pushbutton switch for the Paging with Ducking Application. A microphone without a switch will false-trigger, causing
unwanted interruptions in the program material.
Connect the SCM262 to the sound system as described in General Application.
Set DIP switch 3 or 4 to the down position to activate ducking for microphone channel 1 or 2, respectively.
Set DIP switch 5 position. The Down position sets the ducking so that the program sound is lowered 20 dB when
someone uses a microphone. The Up position sets the ducking so that the program sound is muted when someone
uses a microphone.
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Jukebox Mute Application
In this application, designed primarily for Jukeboxes, any sound source connected to the STEREO 3 channels will
automatically mute any sound coming over the STEREO 1 and 2 channels. This way, a CD player can be playing music, and
then when someone plays a song on the Jukebox, the SCM262 will automatically mute the CD player channels and switch to
the Jukebox. STEREO 1 and 2 channels will remain muted for about 30 seconds after program material is finished, to allow the
jukebox time to move on to the next song.
Connect the SCM262 to the sound system as described in General Application.
Connect the L/R audio outputs of the jukebox to the L/R inputs of STEREO 3.
This feature is designed especially for use with jukeboxes, but will work for any equipment connected to STEREO 3.
Set DIP Switch 6 to the down position (Jukebox Mute on).
If the ducking application is used in conjuction with the Jukebox Mute application, then activated microphones will mute
or duck the STEREO 3 input.
Connections
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内部修改
Internal Modifications
Voltages in this equipment are hazardous to life. No user-serviceable parts inside. Refer all servicing and modifications to
qualified service personnel.
Disassembly
To access the printed circuit board (pc board) for internal modifications, use the following steps:
Unplug the power cord.
Remove the knobs and retainer nuts from the front panel.
Remove the two screws at each bottom corner of the front panel.
Remove the four screws at each corner of the back panel.
Slide the back panel and pc board out from the rear of the chassis.
When reassembling the SCM262, DO NOT OVERTIGHTEN the knob retainer nuts. Use a minimal amount of force to
secure the nut (0.6-0.8 N-m (5-7 in-lb)). Damage to the internal components will result if too much force is used.
Mono Mixer Modification
This modification allows all the inputs to be mixed to a single mono signal sent over both the left and right outputs.
Short jumper X203.
Phantom Power Disable
This modification disables the phantom power per channel.
To disable the phantom power from mic 1, remove resistor R121. To disable the phantom power from mic 2, remove resistor
R122.
15 dB Mic Preamplifier Pad
When a microphone has an extremely high signal, getting the desired gain might be difficult - a small turn of the gain control
might change the sound from a whisper to deafeningly loud. This modification adds a 15 dB Mic preamplifier pad to allow more
accurate gain adjustment with extremely high microphone signals.
Remove R160 (mic 1) or R183 (mic 2).
Hard Panning MIC Channels
To remove MIC 1 from the left outputs, remove R912. To remove MIC 1 from the right outputs, remove R913.
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To remove MIC 2/LINE 2 from the left outputs, remove R910. To remove MIC 2/LINE 2 from the right outputs, remove R911.
Low-Cut Filter
To eliminate the 80 Hz, low-cut filter, remove resistor R501 (mic 1), or resistor R519 (mic 2). Place a 10 to 33 µF capacitor in
X501 (mic 1) or R502 (mic 2). The polarity of the capacitor does not matter. To change the frequency of the low cut filter,
remove resistor R501 (mic 1) or R519 (mic2), and place the proper capacitor into X501 (mic 1) or X502 (mic 2) to get the
desired corner frequency.
The following tables list the low-cut frequency corners for some of the most common capacitor values:
Capacitor Value Corner Frequency
.033 µF 803 Hz
.047 µF 564 Hz
.068 µF 390 Hz
.1 µF 265 Hz
.22 µF 120 Hz
Capacitor Value Corner Frequency
.33 µF 80 Hz
.47 µF 56 Hz
.68 µF 39 Hz
1.0 µF 26.5 Hz
2.2 µF 12 Hz
Ducking Depth
This modification adjusts the level of ducking depth attenuation of the input channels when ducking is activated.
The aux ducking depth may be changed by removing resistor R213 and inserting a resistor into jumper X202. Use the following
tables to determine the proper resistor value for the desired ducking depth.
Ducking Depth Resistor Value
6 dB 4,000 Ω
9 dB 5,000 Ω
15 dB 7,500 Ω
20 dB 10,000 Ω
24 dB 12,000 Ω
29 dB 15,000 Ω
Ducking Depth Resistor Value
36 dB 20,000 Ω
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Ducking Depth Resistor Value
42 dB 25,000 Ω
47 dB 30,000 Ω
50 dB 33,000 Ω
55 dB 40,000 Ω
Ducking Threshold
This modification adjusts the threshold for activating the ducking circuit.
The ducking threshold can be raised or lowered by first removing resistor R333, and then placing a resistor (R) at jumper X303.
To lower the ducking threshold, use a resistor value (R) less than 2k ohms. To raise the ducking threshold, use a resistor value
(R) greater then 2k ohms.
Supplied Hardware
4 rubber feet. For stand-alone installation.
1 rackmount bracket, long. For half-rack (single unit) installations.
1 rackmount bracket, short. For half-rack (single) or dual-mount installations.
2 straddle brackets. For dual-mount or fixed installations.
12 bracket screws, 1/4-in. (6 mm). For securing the brackets to the chassis.
4 rackmount screws, 1 in. (2.5 cm). For mounting the unit in a rack.
4 plastic washers. For use with the supplied rackmount screws.
4 wood screws, 1/2 in. (1.25 cm). For fixed installations.
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Rackmount Installation
The SCM262 can be mounted as a single unit or dual-mounted with either another SCM262 or another Shure half-rack unit
such as the SCM268 or DFR11EQ. Attach the rackmount brackets using one of the following methods:
Single unit (half-rack) installation:
Attach the short and long rackmount brackets to the SCM262 with eight (8) of the supplied bracket screws.
Dual-mounted installation:
Connect the two units together side-by-side using two (2) straddle brackets. The brackets should straddle the recessed
edges on the top and bottom of each chassis. Fasten them using eight (8) bracket screws.
Be sure to use both straddle brackets-one on the top and one on the bottom.
Attach the short rackmount brackets to the outsides of the combined units with eight (8) of the bracket screws.
After attaching the brackets, mount the unit in an equipment rack using the supplied rackmount screws and plastic
washers.
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Stand-Alone Installation
Adhere the four (4) supplied rubber feet to the bottom of the unit at each corner. This will keep it from sliding and
protect the table surface.
Fixed Installation
To permanently affix the SCM262 above or below a table, shelf, or counter top, use the following steps:
Fasten the straddle brackets to the recessed edges of the chassis using four (4) bracket screws.
Top Mount: Fasten the straddle brackets to the bottom of the unit.
Hanging Mount: Fasten the straddle brackets to the top of the unit.
Fasten the straddle brackets to the surface using the four (4) supplied wood screws.
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规格
频率响应
1
千赫下
话筒/线路开关 150 赫兹 到 20 千赫茲 ±2 dB
辅助输入 20 赫兹 到 20 千赫茲 ±2 dB
低切滤波器
-6 dB/倍频程低于 80 赫兹
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总谐波失真
1 kHz, +4 dBu
输出
, +0 dB
混音输出
(MASTER)
<0.25%
等效输入噪声
均衡音源
150Ω , A-
加权
-128 dBV
输出噪音
频道控制器逆时针旋转到底
, A-
加权
Master 逆时针旋转到底 -95 dBV
Master 顺时针旋转到底 -59 dBV
共模抑制
>70 dB, 1 千赫下
极性
所有输入到所有输出都不可反相。
过载和短路保护
将输出短接，即使时间较长，也不会导致任何损害。 +10 dBV 以下的信号不会损害麦克风输入；+28 dBV
以下的信号不会损害线路和辅助输入
均衡
Bass（低频栅形，250 赫兹下的转角频率） ±6 dB
Treble（高频栅形，4 千赫兹下的转角频率） ±6 dB
突降
Mic 通道 1 和 2 电平 -20 dB 或 -∞ dB
Activation time 10 毫秒, 典型
Mic 停用时间 2 秒, 典型
Jukebox Mute 停用时间 30 秒, 典型
幻像电源
通过 680 Ω 电阻器的 12 伏直流开路
工作电压
SCM262 100–200 伏交流, 50/60 赫兹, 60 mA
SCM262E 220–240 伏交流, 50/60 赫兹, 30 mA
温度范围
操作温度 -7° – 35° C (20° –95° F)
存储温度 -29° – 74° C (-20° –165° F)
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外观尺寸
43 x 218 x 162 毫米 (1.72 x 8.60 x 6.37 英寸)
净重
1.1 公斤 (2 磅, 5 盎司)
Voltage Gain (typical, controls full clockwise)
Input
Output
Mic Line Aux
Low-impedance mic (150
Ω)
32 dB 72 dB 60 dB
Line -9 dB 31 dB 19 dB
Stereo -5 dB 35 dB 23 dB
Inputs
Input
Impedance
Designed for use with Actual (typical) Input Clipping Level
Mic (XLR) <600 Ω 1.4 kΩ -16 dBV
Line <10 kΩ 155 kΩ +24 dBV
Stereo <2 kΩ 21 kΩ >28 dBV
Outputs
Output
Impedance
Designed for use with Actual (typical) Output Clipping Level
Mic >600 Ω 3 Ω -22 dBV
Line >5 kΩ 300 Ω +18 dBV
Aux ≥10 kΩ 1.5 kΩ +5 dBV
可替换配件
Knob, Master (blue) 95B8752
Knob, Channel Gain (white) 95A8752
Line (Power) Cords: SCM262: 100-120 Vac (US/Canada) 95B8762
Line (Power) Cords: SCM262E: 220-240 Vac (EU) 95B8778
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Fuse: SCM262 (5x20 mm, 250V, 100mA, time delay) 80Z730
SCM262E (5x20 mm, 250v, 40mA, time delay) 80M258
Hardware Kit 90AW8100
连接杆（支架） 53B8443
Single Mount Bracket 53A8484
Dual Mount Bracket 53E8484
可选配附件
Line (Power) Cord, 230-240 Vac (UK) 95A8713
维修声明
有关其它服务或部件信息，请致电
1-800-516-2525
与
Shure
服务部门联系。美国以外的国家和地区，请与
Shure
授权的服务中心联系。
认证
本产品符合所有相关欧盟指令的基本要求，并且允许使用 CE 标志。
可从以下地址获得“CE 符合性声明”：www.shure.com/europe/compliance
授权的欧洲代表：
Shure Europe GmbH
欧洲、中东、非洲总部
部门：欧洲、中东、非洲审批部
Jakob-Dieffenbacher-Str.12
75031 Eppingen, Germany
电话：+49-7262-92 49 0
传真：+49-7262-92 49 11 4
电子邮件：[email protected]
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Shure SCM262は、マイクとコンシューマー向けステレオ機器を統合する拡声用途向けに設計されたステレオミキサーです。バランス型マイク入力が1つ、ライン入力も可能なバランス型マイク入力が1つ、ステレオAUXレベル入力が3つあります。
Shure SCM262は、レストラン、教室、企業研修、エアロビクスクラス、およびページング/広報システムをバックグラウンドミュージックやその他のプログラム素材と組み合わせる他の状況向けに設計されています。
特長:
- ページングとバックグラウンドミュージックを組み合わせるように設計
- アクティブバランス型XLRマイク入力チャンネル1つ
- アクティブバランス型XLRマイク入力と1/4インチTRSライン入力のチャンネル1つ
- ステレオ入力チャンネル3つ
- ステレオAUXレベル出力
- ステレオMIC/LINE出力
- マスター出力の低音と
他の言語で
- English: Shure SCM262 User guide