Kinki Studio EX-B7 User manual

KINKI STUDIO
EX-B7 POWER AMPLIFIER
INSTRUCTION MANUAL
We are from China English

PREFACE 前言
Thank you for purchasing the KINKI STUDIO EX-B7 Power Amplifier.
Please take some time to read this manual. It can provide you with useful information to enjoy more fun while
listening music with the KINKI STUDIO EX-B7.
Introduction
Founded in 2008, KINKI STUDIO is dedicated to the design and manufacture of high-quality audio equipment. The
core design philosophy is to reproduce the sound to its original recording intent and avoid distortion caused by
excessive rendering. In order to obtain the best results, KINKI STUDIO insists on using the advanced technology in
the audio industry, continuous improvement and refinement over the years,createdKINKISTUDIOtoday.
The high standards and concepts to reproduce sound that have been pursued in the design and manufacturing
process, technology and quality have become the core values of KINKI STUDIO.

WARNING 警告
These instructions must be read before starting the connection or operation, otherwise the
amplifier may be risk to mis-operational damage.
Please read and understand the operation and application in detail below.
This is a very high quality amplifier, features with new technology. It is the industry leading audio
system for reproducing accurate sound. Only careful installation and correct operation can provide
you with the satisfaction you expected. The installation instructions and precautions must be
strictly followed to achieve the desired results without affecting the performance of the amplifier.

CONTENT 目錄
1
01 Unpacking---------------------------------------------------------------------------1
02 Placement & Cold Start---------------------------------------------------------------------2
03 Operational Voltage-------------------------------------------------------------------------2
04 Connections----------------------------------------------------------------------------3
05 Control--------------------------------------------------------------------------------4-5
06 Optimization---------------------------------------------------------------------------------6
07 Protection Features-----------------------------------------------------------------------------7
08 Product Care---------------------------------------------------------------------------------7
09 Technical Parameters-----------------------------------------------------------------------8
10 Block Diagram---------------------------------------------------------------------------9-10

KINKISTUDIO
1
UNPACKING
拆包
2
1. Unpacking
KINKI STUDIO EX-B7 comes with：
- Power Amplifier (each per carton)
- Instruction Manual
- El cheapo Power Cord (Please use your own audiophile power cord for best sound)
Note:
If the power amplifier needs to be returned to the factory for servicing/warranty or secondary
transportation, please use the original packaging. The packaging is specially designed and manufactured
by KINKI STUDIO, which can better protect the amplifier during transportation, so please keep the
original after unpacking the package.

KINKI STUDIO
2
LOCATION
&
COOLING
位置和冷却的選擇
3
2. Placement & Cold Start
KINKI STUDIO EX-B7 Power Amplifier, like all high-quality amplifiers, generates a certain
amount of heat and must be properly dissipated. To ensure good heat dissipation and cooling,
do not place temperature sensitive equipment on top of the amplifier.
EX-B7 comes with 3pcs of footers. Please ensure they are properly placed on the flat surface
on the rack.

KINKI STUDIO
3
OPERATIONAL
VOLTAGE
電壓調整
4
3. Operational Voltage
The normal working voltage of the EX-B7 is AC 100-120V for AC110 option, and AC
200V~245V for AC230 option. If your normal operating voltage is outside the above range,
please consult us.
The EX-B7 is protected by a fuse located at the IEC inlet, rated at 10A slow blow fuse.

KINKI STUDIO
4
CONNETIONS
連接
5
4. Connections
Connect the power cord to the IEC inlet of the amplifier and plug it into the power plug socket.
For safety reasons, a 3-wire grounding (earth) plug must be used, whenever possible.
In order to get the best sound from the amplifier, avoid using any multiple plugs socket or
extension cords.
The signal input connections are located at the rear panel with indication.
You may use either RCA or XLR connection to source/preamp. The XLR Pinout is as follow:
- Pin 1 (Shield)
-Pin2(Hot)
- Pin 3 (Cold)
Warning: Do not remove/insert the interconnects and speaker cable when the amplifier is
powered on.

KINKI STUDIO
5
CONTROLS
控制
6
5. Control
Power Up
The power inlet IEC of the EX-B7 is located at the rear panel. After the power is supplied to the
amplifier, it will be in Standby state.
There are three LEDs and one Power Button located at the front panel. In Standby state, the middle
LED lit in orange colour. To power up, press on the Power Button once, the soft-starter circuit in the
EX-B7 engaged, after a short delay, the amplifier will be in Operational state with two extreme
ends LED lit in green colour.
The left LED is Ready status and the right LED is Speaker Protection status.

KINKI STUDIO
6
SOUND
QUALITY
OPTIMIZATION
聲音質量優化
7
6. Optimization
Placement platform
The EX-B7 has extraordinary dynamic capabilities and sound transparency.Tofullyunleashits
performance, it must be placed on a rigid platform or proper HiFi rack. Please avoid the use of
any soft materials such as carpets underneath the amplifier.
Warm Up
When the amplifier has not been used for a while, it will take 20 to 45 minutes to "warm-up". In
order to achieve the best operating temperature, the circuit must be warmed up to
approximately 55 degrees Celsius.
Note: The EX-B7 amplifier takes about 300 hours to burn in. Please don't worry, the sound will
and can only be improved as it burns in.

KINKI STUDIO
7
SAFETY
FEATURES
安全功能
9
7. Safety & Protection
Speaker Protection
The EX-B7 is equipped with speaker protection feature. In the event of mis-operational or
malfunction of the loudspeaker, the protection circuit engaged to protect the amplifier from
further damage.
The EX-B7 is a direct DC coupler amplifier. If the connected source (Preamp/DAC) has DC-offset
(tube output stage especially), it may result high DC output at the speaker output terminator –
risk of burning the loudspeakers.
Input Signal
Connect only the RCA or XLR interconnect to the EX-B7, one at a time. The interconnect shall
not be placed in parallel to the Power Cord. Placement as such may cause the amplifier to
oscillate. Should the oscillation occur, the right LED will be off – to indicate that the amplifier is
in protection mode. Please check and rearrange cables to mitigate the fault.

KINKI STUDIO
8
MAINTENANCE
維護
11
8. Product Care
The EX-B7 usually requires no maintenance and requires only occasional cleaning of the physical
surface.
The power must be turned off and removed before cleaning the amplifier. Clean the surface of
the amplifier with a soft, slightly damp cloth. Wipe gently with a soft cloth dampened with water
or a mild detergent solution. Please avoid the use of harsh detergents (i.e. product containing
sodium carbonate).

KINKI STUDIO
9
TECHNICAL
SPECIFICATIO
NS
技術數據
12
9. Technical Parameters
Frequency Response: 0-2.5MHz (±3dB)
THDN: ＜0.05% (-80db)
S/N Ratio: >110db(0.01Hz- 1 MHz), >130db (A-Weighted)
Output Power: 250 W RMS(2-8 Ohms)
Max Instantaneous Power: 400w RMS (8 Ohms)
Max Output Voltage: 84VAC, 20A
Slew Rate: 200 V /us (Rise Time < 300ns)
AC Power: 110/240VAC, 50/60Hz (Factory configure).
Power Consumption: 30W Idle, 600W Max Output
Input / Output
Input Sensitivity: 1.45 V RMS
Input Impedance: 51kΩ (Acceptable Range 10-52kΩ )
Input Connector: RCA x 1, XLR x 1
Output: Speaker Binding Post 4mm L/R Channel
Dimension & Weight
Dimension: 330D x 230W x 190H
Weight: 17KG, each

2
3
17
Standby light Ready light
工作指示燈
2Power button
電源按鈕
3
待機指示燈
SAFETY LIGHT
保護工作指示燈
燈
Front Panel
KINKI STUDIO
10

56
7
8
9
XLR Input
平衡信號輸入口
RCA Input
同軸信號輸入口
6SPEAKER
揚聲器輸出口
7FUSE
保險管
8POWER
電源插座
9
18
Rear Panel
KINKI STUDIO
11

KINKI STUDIO