8351B
Smart Active Monitor
Operating Manual
操作手册
2
Introduction
Thank you for choosing Genelec! Fulfilling your dreams by
offering the most truthful sound reproduction has been the
source of our enthusiasm since 1978. Already over one million
Genelec monitors are in use around the world - welcome to our
story!
Genelec monitors are designed to last long our spare
part support extends far into future. They are hand-built in
Iisalmi, Finland, using certified sustainable methods. They are
individually tested and calibrated for the highest performance.
They have also all been designed for low power consumption in
use and in standby.
Please register your monitor at
http://www.community. genelec.com/
and receive an extended five-year warranty for spare parts.
For more information about our service and technical support,
please visit
http://www.genelec.com/customer-service.
System Characteristics
Each 8351B is supplied with a mains power cable, five-meter
GLM network cable and this operating manual. The Genelec
8351B is suitable for all professional monitoring applications
calling for very high precision and reliability. The 8351B
combines many remarkable Genelec technologies to provide
the benefits of a point source and controlled directivity over
an extraordinarily wide audio bandwidth. The 8351B may be
oriented horizontally or vertically. Listening distances can vary
f
rom less than one meter to more than 4 meters, depending on
the room size and maximum sound level requirements.
Genelec Loudspeaker Manager™ (GLM™)
Software and GLM User Kit
The GLM software tailor-fits the 8351B to your room. It is
downloadable free of charge at www.genelec.com/glm. Check
regularly for updates and new features, and consider using the
cloud-based GLM services for the most up-to-date methods.
A GLM User Kit, comprising a USB adapter device and
measurement microphone, enables precise acoustic calibration
and operation of the GLM loudspeaker management network.
Minimum Diffraction Coaxial (MDC™)
The minimum diffraction coaxial transducer MDC design
implements a coaxial driver with unparalleled acoustic directivity
control. A powerful midrange transducer surrounds a high
output tweeter transducer, enabling a high resolution response
extending to ultrasonic frequencies. The MDC minimizes
acoustic diffraction, produces a flat frequency response on the
acoustical axis, and a neutral off-axis sound character.
Directivity Control Waveguide (DCW™) and
Acoustically Concealed Woofers (ACW™)
The 8351B has an exceptionally large Directivity Control
Waveguide extending over the whole enclosure front. The
midrange transducer cone forms a part of this DCW. Two woofers
radiate low frequencies through openings at the enclosure edges
and sum acoustically placing bass on the same acoustical axis
with the coaxial transducer.
This unique design enables directivity
control of all audio down to low bass frequencies.
Smart Active Monitoring (SAM™)
Smart Active Monitors automatically tune several parametric
filters in themselves to precisely compensate for room
colorations using Genelec Loudspeaker Manager (GLM)
software. This enables SAM monitors to sound neutral and
achieve precise stereo imaging in all acoustical environments,
improving accuracy of monitoring.
Audio Inputs
The 8351B inputs support balanced analog line-level audio and
AES/EBU digital audio. At maximum sensitivity, -6 dBu analog
and -30 dBFS digital audio signals produce 100 dB SPL level at
one meter distance in free space.
The analog input is selected when a digital signal is not
present. The digital input is selected automatically when a
digital signal is present even when the signal is silent. The GLM
software can select either input.
When the digital audio source can adjust level, it is
advantageous to lower the output level of the 8351B using the
rear panel controls or the GLM Master Fader. This enables a
higher output level at the source with more resolution while
taking full advantage of the impressively low self-generated
noise of the 8351B.
An AES/EBU digital audio signal carries two channels in one
cable. A channel is selected using the DIP switches or GLM
software. The DIGITAL OUT
carries an
unaltered copy of the
input, enabling daisy-chaining of up to four monitors.
Power Management
The mains power input supports any mains voltage (100-240
VAC, 50-60 Hz) and the 8351B always delivers full power even
when the mains voltage fluctuates. When powered with a
generator, inverter or UPS device, we recommend filtering the
mains power to remove harmonics.
The energy saving function Intelligent Signal Sensing (ISS™)
puts the monitor to power educed sleep mode when no signal
is present. Upon sensing an input, the monitor wakes up. The
function is activated using GLM software or the ISS dip switch
on the monitor. With GLM the time before entering the sleep
mode can be adjusted, the ISS dip switch activates a fixed 60
minute time.
Setup Using The GLM™ Control
Genelec recommends setting up the 8351B and other SAM
monitors using GLM. This is described in the GLM System
Operating Manual. Although it can be used without GLM and the
network, the 8351B reaches its full potential with this method.
GLM software runs on Mac or Windows computers. GLM also
works as a monitor controller, for switching between sets of
loudspeakers, soloing, muting, invoking calibrated levels, etc.
Setup with the GLM User Kit consists of the following steps:
1. Connect a CAT5 (RJ45) cable to each monitor (and
subwoofer) and finally to the GLM Adapter device (see
Figure 1).
2. Connect the GLM Adapter device to computer USB connector.
3. Using a microphone stand, place the Genelec measurement
microphone (in GLM Kit) at the listening location. Point
microphone upwards. Place the microphone top at the ear
3
Figure 2. Connectors and controls on the back panel of a 8351B.
Figure 1. GLM control network cabling
Figure 3. Connector panel detail.
height for typical listener.
4. Connect the microphone to the microphone input in the
GLM Adapter device.
5. Download and install the GLM software at the Genelec web
site (www.genelec.com). Follow instructions in the software
to measure and set up your monitors.
6. If you plan not to use a computer for managing monitors,
store settings in monitors with GLM software (menu item
“Store | Store the Current Group Settings…”).
Enable stored settings by turning the DIP switch “Stored” on
the monitor to ON after the network has been disconnected.
The CONTROL NETWORK RJ-45 connectors are not
Ethernet LAN compatible. Do not connect to Ethernet LAN.
Stand-alone Mode: Setup Without Using
The GLM
You can adjust the 8351B without GLM using the controls on the
back of the monitor. These stand-alone settings are limited and
provide some fundamental compensations for room acoustic
effects, input selections and input sensitivity. To use, disconnect
the GLM management network and set the DIP switch “Stored”
to OFF position.
Stand-Alone Functionality
Bass Roll-Off Control
The Bass Roll-Off setting reduces bass level for spaces with
strong low frequency reverberation. It reduces output near the
MICROPHONE
PLACED IN
THE LISTENING
POSITION
292 0063
GLM
TERMINATOR
COMPUTER
RUNNING
GLM SOFTWARE
USB CABLE
GLM ADAPTER
GLM NETWORK
CABLE
MONITORS
SUBWOOFER
ANALOG
IN
DIGITAL THRU
AES/EBU
DIGITAL IN
AES/EBU
MADE IN FINLAND
8351B
SERIAL NUMBER
www.genelec.com
GLM
NETWORK
MAINS INPUT
50 / 60 Hz 200 W
100 240 V~
292 8350T 6
This device complies
with FCC Part 15 and
Canadian ICES 003
radio frequency
ClassBemission
requirements. Refer
to operating manual
for full information.
BASS ROLL OFF
LED DISABLE
BASS TILT
A
20 dB
B
2
4
2
4
ON
OFF
STORED
(dB)
10 dB
RESET TO FACTORY
SETTINGS: PUSH
BUTTON FOR 10 SEC
LEVEL
DIGITAL
TREBLE TILT
+2
4
DESKTOP 160 Hz 4
(dB)
20 160
+2
2
4
dB
6
0
4k 20k
BASS
TILT
800
BASS
ROLL OFF
DESKTOP
ALL OFF
TREBLE
TILT
Frequency (Hz)
INPUT dBu
PRODUCING
100 dB SPL (1 m)
ISS
2
+4
+2
4
6
+6
dBu
0
COAXIAL TRI AMPLIFIED
SMART ACTIVE MONITOR
DIP SWITCHES FOR
STAND ALONE USE
ROTARY LEVEL
CONTROL
POWER
SWITCH
AUDIO SIGNAL
CONNECTORS:
DIGITAL IN
DIGITAL THRU
ANALOG IN
MAINS
INPUT
GLM NETWORK
CONNECTORS
4
Figure 4. The location of the acoustic axis.
Figure 5. Symmetrical layout and keeping the acoustic axis clear
from obstructions minimizes reflection surfaces and maintains
accurate localisation because reflections are symmetrical.
Monitor
Mounting Position
Treble
Tilt
Bass
Tilt
Bass
Roll-Off
Desktop
Flat anechoic
response
None None None None
Free standing in
a damped room
None -2 dB None None
Free standing in
a reverberant room
None -4 dB None None
Near field on
a reflective surface
None -2 dB None -4 dB
In a corner None -4 dB -4 dB None
Table 1. Suggested Tone Control settings for some typical monitor
placement positions.
low cut-off. Attenuation can be selected by combining settings
on one or more switches.
Desktop reflection compensation
The desktop control reduces frequencies near 160 Hz by 4 dB.
This compensates the boost when the monitor is placed on a
meter bridge or table.
Bass Tilt Control
The Bass Tilt control offers three attenuation levels for the
response below 800 Hz. This control is used when monitors are
placed near wall or room corner. Attenuation can be selected by
combining settings on one or more switches.
Treble Tilt Control
The Treble Tilt control adjusts the high frequencies above 5 kHz.
It corrects bright or dull sound and compensates high frequency
loss when a monitor is placed behind a screen.
LED Disable
This switch turns off the front panel LED light.
ISS
This switch activates and deactivates the ISS power saving
function when the 8351B is used in a Stand Alone mode. The
default time for going to power save mode is 60 minutes, but
this can be adjusted in the GLM software.
Digital
The Digital switch selects the digital audio signals A and B carried
in one AES/EBU cable. Turning on both switches reproduces the
sum of the signals. When both are selected, a 6 dB attenuation
is applied to avoid an overload.
Level
The Level switches reduce the monitor output in 10 dB steps
(-10 dB, -20 dB and both switches -30 dB). The switches
combine with the rotary level adjustment. The total adjustment
range is 42 dB. GLM software enables wider level adjustment.
Stored
The Stored switch selects between the controls on the monitor
back panel (OFF position) or applying the settings stored in the
monitor using the GLM software (ON position).
Operating Environment
This product is designed for indoor use only. The permissible
ambient temperature is 15-35 degrees Celsius (50-95°F) and
relative humidity 20% to 80% (non-condensing). To prevent
condensation after the product has been in a cool environment,
wait at least one hour before opening the packaging and
connecting the mains power.
Cooling of the 8351B must be ensured. The minimum
clearance behind, above and on both sides of the monitor is
50
mm (2 in). When 8351B is installed in a recess, the recess space
must be ventilated sufficiently to remove the heat.
Mounting and Placing Monitors
Mounting Options
The Isolation Positioner/Decoupler™ (Iso-Pod™) stand allows
tilting of the monitor and isolates vibrations. As delivered from the
factory, the Iso-Pod retainer spring is attached to the bottom of the
enclosure for vertical orientation. If you want to use the monitor
in horizontal position, remove the retainer spring and reattach it
ACOUSTIC
AXIS
h1
ACOUSTIC
AXIS
h2
h1 = 237 mm (9 5/16 in)
h2 = 169 mm (6 10/16 in)
Power amplifier overload protection is
active (audio is modified becaue of
5
Table 2. Monitor front panel light indications summary
Colour Indication
Solid greed Normal state, normal operation
Blinking green GLM is adjusting the monitor
Green blink every 10 sec. Monitor is in an ISS power saving sleep
state
Red blink
protection)
Solid red Monitor is muted
Yellow Monitor is not in the active (playing)
group
Yellow blinking Overheat protection is active (audio is
modified because of protection)
to the side mounting threads (see fig. 6). Never use the iso-Pod
without the retainer spring as this may cause the monitor to fall.
Aim the acoustic axis of the monitor towards the listening
position (see Figure 4). Place monitors symmetrically and at
equal distances from the listening position. Preference should be
made in placing the listening position on the left-right centerline
of the room (see Figure 5). If a monitor is placed far (1.0-2.2
m, 3-7 ft) from the acoustically hard wall behind the monitor, a
reflection from the wall may reduce bass output. Avoid these
distances.
Place monitors away from acoustically reflective surfaces.
Reflections from desks, cabinets, computer monitors and such
objects can colour audio and blur sound images. Place monitors
on stands behind and above a mixing console as this usually
improves audio compared to placing monitors on a meter bridge.
Ceiling and wall mounts are available through Genelec
dealers. Monitor mounts attach to four M6 x 10 mm threaded
holes on the enclosure back. Consult the Genelec Accessories
Catalogue at www.genelec.com or distributor/dealer for
information.
Front Panel Light
The light on the front panel is normally green. Red and yellow
colours indicate special situations. See Table 2.
Use with Subwoofers
Genelec recommends 7300 series subwoofers and the W371
Adaptive Woofer System for 8351B. Consult the on-line Genelec
Product Selection Tool at www.genelec.com.
Maintenance
Do not open the monitor enclosure. Opening the monitor
may lead to loss of the monitor calibration and may damage
components. There are no user serviceable parts inside.
Maintenance or repair can only be done by Genelec certified
service.
Safety Considerations
The 8351B follows international safety standards. To ensure
safe operation, the following warnings and precautions must be
observed:
• Servicing and adjustment must only be performed by
certified Genelec service personnel. The monitor enclosure
must not be opened.
• Use the product only with a mains cable having a
protective ground terminal and with a mains connection
with a protective earth terminal. Failing to do so may lead to
personal injury.
• To prevent fire and electric shock, do not expose the unit
to water or moisture.
• Do not place objects filled with liquid, such as vases, on
the monitor or near it.
• Note that the device is not disconnected from the AC
mains service unless the power cable is removed from the
monitor or the mains outlet.
• Free flow of air behind and around the monitor maintains
sufficient cooling. Do not obstruct airflow around the
monitor.
WARNING!
The 8351B is capable of producing sound pressure levels in
excess of 85 dB, which may cause hearing damage. Sound
exposure level integrated over eight contiguous hours should be
limited to Leq=80dB(A) to reduce the risk of permanent hearing
damage. For each 3 dB increase in this sound level, half this
exposure time.
Guarantee
The Genelec 8351B is guaranteed for two years against
manufacturing faults or defects altering performance. You
can
get an additional three-year guarantee covering spare part costs
by registering your product at www.genelec.com. Refer to your
point of purchase for full sales and guarantee terms.
Compliance to FCC Rules
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio
communications. There is no guarantee that interference will not
occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of
the following measures:
Figure 6. Placing the Iso-Pod stand when the monitor is used in
horizontal position.
6
Figure 7. The curves above show the horizontal directivity
characteristics of the 8351B (monitor in vertical orientation).
Figure 8. The curves above show the vertical directivity
characteristics of the 8351B (monitor in vertical orientation).
Figure 9. The curves above show the effect of the “Bass Tilt”,
“Treble Tilt”, “Desktop Low Frequency” and “Bass Roll-Off”
controls on the free field response of the 8351B.
Figure 10. Frequency responses at 0, 15, 30, 45 and 60 degree
horizontal angles (monitor in vertical orientation) and power
response in full space. Input level -20 dBu.
Figure 11. The curve above shows the delay variation of the 8351B
as a function of frequency.
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for
help.
Modifications not expressly approved by the manufacturer
can void the user’s authority to operate the equipment under
FCC rules.
20
20k
50
100
200
500
1k 2k
5k
10k
Frequency Hz
Genelec Oy 8351B dB vs freq (Hz) 10 Sept 2019
80
85
90
BASS ROLL OFF
TREBLE TILT
80
85
90
80
85
90
DESKTOP LF
BASS TILT
dB LPS
20
20k
50
100
200
500
1k 2k
5k
10k
Genelec Oy 8351B dB vs freq (Hz) 05 Aug 2019
0°
60°
15°
30°
45°
80
85
90
95
70
75
80
85
90
95
dB LPS
dB LWS
Frequency Hz
20k
50
100
200
500
1k 2k
5k
10k
Frequency Hz
Genelec Oy 8351B 10 Sept 2019
ms
5
0
10
15
35
20
25
30
40
5
7
SYSTEM SPECIFICATIONS
Lower cut-off frequency, –6 dB < 32 Hz
Upper cut-off frequency, –6 dB > 43 kHz
Accuracy of frequency response, ± 1.5 dB 38 Hz – 20 kHz
Maximum short term sine wave acoustic output on axis in half space, averaged from
100 Hz to 3 kHz at 1 m
≥ 113 dB SPL
Maximum long term RMS acoustic output in the same conditions with IEC weighted
noise (limited by driver protection circuit) at 1 m
103 dB SPL
Maximum peak acoustic output per pair in a listening room with music material at 1 m 118 dB
Self generated noise level in free space at 1 m on axis (A-weighted) ≤ 5 dB
Harmonic distortion at 90 dB SPL at 1 m on axis
Freq: 50…100 Hz
> 100 Hz
< 2 %
< 0.5 %
Drivers
Bass
Midrange
Treble
Dual 218 x 101 mm (8
5
/
8
x 4 in) obround cones
130 mm (5 in) cone (coaxial)
25 mm (1 in) metal dome (coaxial)
Weight 14.3 kg (31 lb)
Dimensions
Height including IsoPod stand
Height without IsoPod
Width
Depth
454 mm (17
7
/
8
in)
433 mm (17 in)
287 mm (11
1
/
3
in)
278 mm (11 in)
Figure 12. The signal path block diagram of the 8351B.
Genelec Document D0160R001a Copyright Genelec Oy 11.2019. All data subject to change without prior notice.
www.genelec.com
International enquiries:
Genelec, Olvitie 5
FIN-74100, Iisalmi, Finland
Phone +358 17 83881
Fax +358 17 812 267
Email [email protected]om
In the U.S. please contact:
Genelec, Inc., 7 Tech Circle
Natick, MA 01760, USA
Phone +1 508 652 0900
Fax +1 508 652 0909
Email genelec.usa@genelec.com
In China please contact:
Beijing Genelec Audio Co.Ltd
B33 - 101
Universal Business Park
No. 10 Jiuxianqiao Road
Chaoyang District
100015 Beijing, China
Phone +86 (10) 5823 2014, 400 700 1978
Email [email protected]
In Sweden please contact:
Genelec Sverige
Ellipsvägen 10B
P.O. Box 2306
S-127 02 Skärholmen
Phone +46 8 449 5220
Fax +46 8 708 7071
Email [email protected]
8351B
Analog signal input connector XLR female, balanced 10 kOhm
Maximum analog input signal
Analog input sensitivity (100 dB SPL at 1 m)
Analog input sensitivity control
pin 1 gnd
pin 2 non-inverting
pin 3 inverting
+25.0 dBu
-6 dBu
Adjustable from +36 to -6 dBu
Digital signal input connector XLR female 110 Ohm
Digital signal output / Thru connector XLR male 110 Ohm
Digital audio input
Word length
Sample rate
Digital input sensitivity (100 dB SPL at 1 m)
Digital input maximum attenuation using DIP switches
Digital input maximum attenuation using GLM software
AES/EBU Single Wire
AES/EBU Single Wire
16 - 24 bits
32 - 192 kHz
-30 dBFS
42 dB
120 dB
Control network
Type
Connection
Proprietary GLM™ network
2 RJ45, CAT5 cables
Crossover frequencies
Bass/Mid
Mid/Treble
320 Hz
2800 Hz
GLM
TM
software frequency response adjustment*
Parametric notch filters
Shelving filters
16
2 LF and 2 HF
System room response calibration Genelec GLM AutoCal™, GLM
TM
manual, Stand-alone*
SIGNAL PROCESSING
Bass amplifier short term output power
Midrange amplifier short term output power
Treble amplifier short term output power
(Long term output power is limited by driver protection circuitry)
250 W
150 W
150 W
Amplifier system THD at nominal output <0.05%
Mains voltage 100-240 VAC 50/60 Hz
Power consumption
ISS active
Idle
Full output (short term)
< 1 W
16 W
250 W
AMPLIFIER SECTION
TM
and GLM
TM
manual system calibration features are part of the Genelec Loudspeaker Manager (GLM
TM
) software*The notch and shelving filters adjustments,autocal
https://www.genelec.cn/?post_type
=products&page_id=24634）
每只8351B配备1条电源线，1条5m GLM 网线以及此本说明书。
真力8351B适用于所有高精度、高可靠性要求的专业监听场合。
8351B集成了真力多项核心技术，以开创性的同轴设计配合大
面积指向性控制波导，得到了点声源重放的精准声像定位，扩
大了最佳聆听区域。8351B既可以水平摆放，也可以垂直摆放。
典型的聆听距离在不到一米至超过四米的宽阔范围内，取决于
房间尺寸和最大声压级的要求。
使用GLM音箱管理软件可以使8351B与房间环境精确耦合。您
可以在https://www.genelec.cn/?post_type=products&
page_id=24634免费下载GLM软件，并可以定期访问以获得最
新版本使用最新功能，另外可以考虑使用基于云端的GLM服务，
该服务使用最新的计算方法。GLM测试套件包含 GLM适配盒和
校准话筒，可以对GLM音箱管理网络中的音箱进行精确的
声学校准和控制。
MDC™最小衍射同轴单元使得同轴单元具有优秀的指向性控制
特性。高输出的高音单元外环绕了一圈强大的中音单元，保证
了超高频部分平直的频率响应。MDC设计尽可能地减少了声波
衍射问题，在声轴上和离轴方向都能得到平直的频率响应。
8351B拥有在传统音箱设计中难以实现的超大型指向性控制波
导，延伸至整个前面板。中频单元的盆体同时构成了高频指向
性波导的一部分。两个低频单元通过面板上下的开口辐射低频，
并和中高音同轴单元构成声学中心重合的同轴结构。这一独特
设计可以使指向性受控的频段扩展至低频。
智能有源监听音箱可以使用真力音箱管理软件进行自动校准设
定，通过自动调整内置的多组参量均衡滤波器，精确补偿房间
声学带来的染色。得益于此，真力SAM音箱可在各种声学环境
中获得自然的响应和精确的立体声像定位，从而提高监听的精
确性。
8351B支持平衡线路模拟输入和AES/EBU格式数字输入。在灵
敏度设置为最高的情况下，当模拟输入信号为-6dBu或者数字
输入信号电平为-30 dBFS时，可在自由场中距离音箱1米处得
到100dB SPL的声压级。
8351B电源输入支持全球通用电压（100-240VAC，50-60H，
并且即使在不同电压环境中，8351B都可以获得最大输出。当
使用发电机、逆变器或UPS等设备供电时，我们建议使用额外
设备来滤除电源杂波。
ISS™智能信号监测功能可在无信号输入时让音箱进入休眠模
式。在监测到输入信号后，音箱将自动回到工作状态。该功能
需要通过GLM软件或者监听音箱上的ISS拨档开关激活。进入
休眠模式的等待时间可以通过GLM软件进行调整。使用拨档
开关开启ISS功能时，默认进入休眠的等待时间为60分钟。
真力建议使用GLM软件设置8351B和其他SAM音箱。《GLM系
统使用手册》详细描述了设置方法。尽管8351B可以脱离GLM
软件进行使用，但仅在使用GLM软件进行设置的情况下，才能
发挥出其最佳性能。GLM软件可在Mac或者Windows系统的
计算机上运行。GLM还可以作为监听控制器使用，用于在多组
音箱之间切换，独听（Solo），静音（Mute），将音量一键
调整为校准电平等。
感谢您选择真力！通过为您提供最精准的声音再现实现您的梦
想，是真力自1978年成立以来的不懈追求。如今，世界上已经
有超过一百万只真力监听音箱正在使用中⸺欢迎加入我们！
真力监听音箱经久耐用，并长期提供维修备件。音箱在位
于芬兰伊萨尔米的工厂制造，并一直秉承可持续发展和绿色环
保的理念。在出厂前逐一经过严格检测和校准，使其工作在最
佳状态。所有音箱在使用或者待机时，都具有低功耗的特点。
请扫描音箱包装上的二维码，注册您的音箱。注册之后，
将获得长达5年的硬件质量保修。更多信息请参考:
https://www.genelec.cn/?page_id=17021
介绍
系统特征
GLM™（真力音箱管理）软件和GLM测试套件
MDC™最小衍射同轴技术
DCW™指向性控制波导和ACW™声学隐藏式单元
SAM™智能有源监听技术
音频输入
当未连接数字信号时，音箱将自动选择模拟输入。当连接
数字信号时，即使音源没有播放任何内容，音箱也将自动选择
数字输入。输入源切换可以在GLM软件里设置。
在使用电平可调的数字音源时，更优的方式为使用音箱背
板的音量旋钮或者GLM软件主界面上的主推子降低输出电平，
而非降低音源的音量。这样音源可以利用更高的电平输出以获
得更高数字精度，同时完整利用8351B底噪极底的优势，获得
更高的动态范围。
AES/EBU数字音频信号在一根线缆传输两个通道。使用拨
档开关或GLM软件设定每只音箱使用的信号通道。DIGITAL
OUT（数字环出）用于输出与数字输入接口相同的信号，最多
允许以菊花链方式连接4只监听音箱。
电源管理
使用GLM进行音箱设置
9
脱离GLM时，您仍可以使用音箱背面的拨档开关来调整8351B
的设置。单机模式的设置功能相对有限，仅能提供房间声学补
单机模式：脱离GLM进行音箱设置
10
图1 GLM 控制网络连接示意图
在低频混响较强的空间内，低频滚降（Bass Roll-Off）设置可
衰减低频电平。它衰减低频截止点附近的频率。可以通过使用
一个开关或组合使用 多个开关达到衰减目的。
桌面反射补偿
使用桌面反射补偿功能，可在160Hz左右的频率衰减4dB。当
音箱放置在调音台表桥或者桌面上时，使用该设置可以补偿这
种摆位带来的低频隆起。
低频搁架（Bass Tilt）控制
低频搁架（Bass Tilt）为800Hz以下的低频响应提供三种衰减
设置。通常当音箱靠近房间墙壁或角落时，需要启用此设置。
可以通过使用一个开关或组合使用多个开关达到衰减目的。
高频搁架（Treble Tilt）控制
高频搁架（Treble Tilt）可调节5kHz以上的高频。当音响系
统的高频过分明亮或暗淡时，或者音箱置于透声幕后导致高频
衰减时，需要启用此设置进行补偿。
图2 8351B 背板的接口与控制按钮
图3 接口面板详图
偿、输入源选择和输入灵敏度调整。如需使用此模式，请确保
GLM音箱管理网络断开，同时将“Stored”拨档开关调至
OFF状态。
低频滚降（Bass Roll-Off）控制
在低频混响较强的空间内，低频滚降（Bass Roll-Off）设置可
衰减低频电平。它衰减低频截止点附近的频率。可以通过使用
一个开关或组合使用 多个开关达到衰减目的。
单机控制功能
适配盒
11
关闭LED
此拨挡开关可以熄灭前面板的LED指示灯。
智能信号监测ISS
当8351B在单机模式下使用时，此拨挡开关用于开启或关闭
ISS自动休眠功能。默认进入休眠模式的等待时间为60分钟，
该时间可通过GLM软件进行调整。
数字（Digital）
数字拨挡开关用于选择AES/EBU线缆中承载的A和B通道信号
。将两个开关都调至ON时，音箱将混合A和B通道信号进行重
放，此时会衰减6dB以防信号过载。
电平（Level）
电平拨挡开关可以以10dB步进衰减音箱的输出（-10dB、
-20dB或两个拨挡开关都打开为-30dB）。此设定与灵敏度旋
钮可同时叠加使用，最大调整幅度为42dB。使用GLM软件可
进行更宽阔的电平调整。
存储（Stored）
存储开关（Stored）在OFF状态时，音箱使用背面板拨挡开关
的设置；此开关在ON状态时，音箱使用GLM软件校准后存储
在音箱内部的设置。
安装选项
Iso-Pod™桌面隔振音箱垫可以调节音箱的俯仰角度以及隔离
振动。音箱垫的金属支架出厂默认安装在箱体底部，用于垂直
摆放。如果音箱需要水平摆放，请卸下金属支架的固定螺丝，
将其安装在箱体侧面的螺纹孔上（见图6）。切勿在未固定螺
丝的情况下使用Iso-Pod，这可能导致音箱掉落。
音箱的声轴需指向听音位置（见图4）。将音箱对称摆放，
确保每只音箱与听音位置等距。最好将听音位置设置在房间左
右的中轴线上（见图5）。当音箱距离其后方的实墙1.0-2.2米
时，墙面的反射会造成低频的抵消，减少特定范围的低频在监
听位置上的声压级，因此请避免采用上述的距离摆放音箱。
请将音箱远离声学反射面放置。音箱周围的桌面、柜体、
电脑显示器等类似物体带来的反射声，会造成有害的声染色，
并使声像定位变得模糊。相比将音箱放置在调音台表桥上，使
用支架将音箱放置在调音台后上方音质更佳。
您可以从真力经销商处选购吊顶和壁挂安装配件。通过箱
体背板的四个M6 x 10毫米螺纹孔安装音箱挂架。可通过查阅
真力网站www.genelec.com上的《真力配件目录（Genelec
Accessories Catalogue）》或者咨询经销商获取更多信息。
此产品仅限室内使用。允许的环境温度为15-35℃（50-95℉）
，相对湿度为20%至80%（未凝结）。为了防止冷凝，当此产
品从温度较低的储存或运输环境，转移至温暖的环境中时，请
静候至少1小时后再开箱通电使用。
必须保证8351B周围有足够的冷却散热空间。音箱后方、上
方以及侧方需留有最小50毫米（2英寸）的净空。如果音箱采
用嵌入式安装，需保证有效的通风以供散热。
使用环境
音箱的安装和摆放
前面板指示灯通常为绿色。当音箱处于特殊状态时，指示灯会
变为红色或黄色。详情请见表2。
前面板指示灯
真力推荐您选择7300系列超低音音箱或者W371母带低音系统
。更多有关系统设置与搭配的信息，请参考《真力监听音箱设
置指南》，也欢迎咨询真力中国分公司或当地经销商。
配合超低音音箱使用
音箱安装摆位
高频搁架
控制
低频搁架
控制
低频滚降
控制
桌面补偿
消声室放置 关闭 关闭 关闭 关闭
在吸声室自由放置 关闭
-2 dB
关闭 关闭
在混响室自由放置 关闭
-4 dB
关闭 关闭
放在反射面上，
用于近场监听
关闭
-2 dB
关闭
-4 dB
靠角落放置 关闭
-4 dB -4 dB
关闭
表 1. 在不同声学环境下的频率响应调节建议
图5 正确的音箱布局：在房间中对称放置，声轴避开障碍物，以得到最佳
的声像定位。
图4 声轴的位置
h1 = 237 mm (9 5/16 in)
h2 = 169 mm (6 10/16 in)
12
切勿拆开音箱箱体。拆开音箱箱体可能导致出厂校正失效以及
元件受损。音箱内部没有任何用户可调整的部分。任何关于音
箱的维护或维修都应由真力授权的维修服务人员来完成。
维护
警告！
8351B 可以产生超过 85dB 的声压级，这可能会引起永久性听
力损伤。若聆听时间超过 8 小时/天，请将声压级控制在 80dB
（A计权）以内，以降低永久听力损伤的风险。声压级每增加
3dB，聆听时间应当减半。
真力8351B针对材料和工艺上的质量问题提供2年的质保服务
。通过扫描包装箱上的二维码注册您的音箱，可将质保期延长
至5年。详细质保条款请您咨询当地经销商。
质保
该设备已经经过测试，符合B类数字设备的限制，且符合FCC
标准第15部分的要求。这些限制旨在提供合理的保护，防止在
住宅区安装时产生有害干扰。该设备会产生，使用并辐射射频
FCC符合性声明
表2 音箱前面板LED 指示灯状态
颜色 状态
绿色长亮 正常工作状态
绿色闪烁 GLM正在调整该音箱
绿色每10 秒闪烁一次 音箱处于休眠状态
红色闪烁
功放过载保护启动
（音频信号因此受到改变）
红色长亮 音箱静音
黄色 音箱未在当前编组
黄色闪烁
过热保护启动
（音频信号因此受到改变）
图6. 当监听音箱横置使用时，如图所示在音箱底部放置Iso-Pod。
图7.以上曲线是在自由声场中对 8351B 分别使用了低频搁架控制（Bass
Tilt）,高频搁架控制（Treble Tilt）, 桌面补偿（Desktop Low Frequency ） 和
低频滚降控制（Bass Roll-Off）后的频率响应曲线。
图8.以上曲线是当音箱垂直摆放，输入电平为-20dBu 时，在自由声场中偏
离声轴不同角度（0
°
、15
°
、30
°
、45
°
和60
°
）测得的频率响应曲线。
20
20k
50
100
200
500
1k 2k
5k
10k
Frequency Hz
Genelec Oy 8351B dB vs freq (Hz) 10 Sept 2019
80
85
90
BASS ROLL OFF
TREBLE TILT
80
85
90
80
85
90
DESKTOP LF
BASS TILT
Bd LPS
20
20k
50
100
200
500
1k 2k
5k
10k
Genelec Oy 8351B dB vs freq (Hz) 05 Aug 2019
0°
60°
15°
30°
45°
80
85
90
95
70
75
80
85
90
95
Bd LPS
Bd LWS
Frequency Hz
安全注意事项
8351B严格按照国际安全标准设计，但您仍需注意以下警告和
注意事项，确保安全操作：
切勿自行拆开音箱。任何关于音箱的维护或维修都应
由真力授权的维修服务人员来完成。
切勿使用未连接保护地的电源，这可能会危及人身安
全。
切勿将音箱暴露在水中或潮湿环境，这可能会导致火
灾或触电。
切勿在音箱上或其附近摆放装有液体的物品，例如花
瓶。
请注意，本设备采用电源插头作为断开装置。除非将
电源线从音箱上或电源插座上拔掉，否则设备并未完全
与交流电源断开连接。
切勿阻挡音箱周围的气流。确保音箱后方有足够的空
气流动，使音箱能够充分冷却。
13
图9 上图表示8351B 的水平面指向特性（音箱垂直摆放时）。 图10 上图表示8351B 的垂直面指向特性（音箱垂直摆放时）。
图11 以上曲线表示不同频率下8351B 的延时响应变化。
20k
50
100
200
500
1k 2k
5k
10k
Frequency Hz
Genelec Oy 8351B 10 Sept 2019
sm
5
0
10
15
35
20
25
30
40
5
图12. 8351B的信号路径图
模拟输入
数字AES/EBU输入
数字AES/EBU环出
房间
声学均衡
相位
均衡
分频
滤波器
高音均衡
中音均衡
低音均衡
电平和
可选增益
过载保护
过载保护
高音功放
中音功放
低音功放
高音单元
中音单元
低音单元
系统参数
低频截止频率 < 32 Hz
高频截止频率 > 43 kHz
频率响应精确度 38 Hz – 20 kHz
半开放空间内，轴上最大短时正弦波声学输出，100 Hz - 3 kHz均值 @1米 ≥ 113 dB SPL
在相同条件下，使用IEC计权噪声测试最大长期RMS 声学输出（受驱动单元保护电路限制）
@1米
103 dB SPL
在听音室内，使用音乐素材进行测试，在距音箱1米处每对音箱最大峰值声学输出。 118 dB
自由场内自身噪声电平 @ 1米 轴上 (A计权) ≤ 5 dB
总谐波失真 @90 dB SPL @1米，轴上。
频率： 50
...
100 Hz
> 100 Hz
< 2 %
< 0.5 %
驱动单元
低音
中音
高音
双218 x 101毫米(8 5/8 x 4英寸)椭圆型
130毫米(5英寸) 锥体 (同轴 )
25 毫米 (1 英寸) 金属球顶 (同轴 )
重量 14.3千克（31磅）
尺寸：
高度（含Iso-Pod防振底座）
高度（不含Iso-Pod防振底座）
宽度
深度
454毫米（17
7
/
8
英寸）
433毫米（17 英寸）
287毫米（11
1
/3 英寸）
278毫米（11 英寸）
功放部分
低音功放短期输出功率 250瓦
中音功放短期输出功率 150瓦
高音功放短期输出功率（长期输出功率受驱动单元保护电路限制） 150瓦
在标称输出功率下功放系统失真参数 <0.05%
电源电压 100-240 VAC
50/60 Hz
功耗:
待机
空闲
满输出（短期）
< 1 W
16 W
250 W
14
信号处理
模拟信号输入接口：XLR母座（平衡式10k欧姆） 针脚1：地
针脚2：正极
针脚3：负极
最大模拟信号输入电平 +25.0 dBu
模拟输入灵敏度 (100 dB SPL 在1 米处) -6 dBu
模拟输入灵敏度控制 调整范围为从+36到-6dBu
数字信号输入接口：XLR母座（110 欧） AES/EBU 单线
数字信号输出／环出接口：XLR公座（110 欧） AES/EBU 单线
数字信号输入:
量化精度
采样范围
16 - 24 bits
32 - 192 kHz
数字输入灵敏度 (100 dB SPL at 1 米)
-30 dBFS
使用拨档开关时，数字信号输入最大衰减范围
使用GLM软件时，数字信号输入最大衰减范围
42 dB
120 dB
控制网络
类型
专用的真力GLM网络
连接方式
GLM软件频率响应调整
参量陷波滤波器
系统房间响应自动校准
分频点
低频／中频
中频／高频
2条5类网线
16
使用真力GLM管理套件进行自动或手动校准，
也可使用音箱背板的独立控制开关（DIP开关)
320 Hz
2800Hz
* GLM™真力音箱管理软件包含陷波滤波器和搁架滤波器的调整，AutoCalTM自动校准和GLM手动系统校准功能。
Genelec Document D0160R001 Copyright Genelec Oy 9.2019. All data subject to change without prior notice.
www.genelec.com
International enquiries:
Genelec, Olvitie 5
FIN-74100, Iisalmi, Finland
Phone +358 17 83881
Fax +358 17 812 267
Email genelec@genelec.com
In the U.S. please contact:
Genelec, Inc., 7 Tech Circle
Natick, MA 01760, USA
Phone +1 508 652 0900
Fax +1 508 652 0909
Email genelec.usa@genelec.com
真力中国
北京市朝阳区酒仙桥路10号
恒通商务园 B33-101
电话 400 700 1978
微信 真力GENELEC
微博 @真力GENELEC
Email genelec.china@genelec.com
In Sweden please contact:
Genelec Sverige
Ellipsvägen 10B
P.O. Box 2306
S-127 02 Skärholmen
Phone +46 8 449 5220
Fax +46 8 708 7071
Email [email protected]
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Genelec 8351B SAM Studio Monitor 取扱説明書
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