5—12
5.3 Block diagram
5.4 Other functions, protections
5.4.1 Short circuit protection
The amplifier contains a protection circuit against wrong / shorted / speaker cable or burnt speakers.
5.4.2 Speaker protection
The speaker cabinets are protected against a possible malfunction of power stage. This circuit detaches the
speaker cabinets when power stage fault occurs, protecting the cabinets from halmful direct current.
5.4.3 Click noise reduction
The connection of the speaker cabinets is internally delayed after switching on, therefore there is no click
noise on the speaker cabinets when switching on or off.
1.
Input
stage
2.
Preamp
3.
Shape
4.
Valve
Loop
6.
Comp.
9.
Speaker
Prot.
7.
Volume
Control
8.
Power
Amp.
10.
Level
Det.
13.
Line
Buffer
12.
Phone
Amp.
15.
Fan
Control
Active
Passive
5.
Active Eq.
Send
Return
Gain
FS1: Shape / Valve Loop
Bass, Treble, On
Low, Low-Mid, Mid-
freq, Mid, High
FS2
11.
Noise
Gate
Mute
Noise Gate,
On
Volume
GND Lift
Line Out
Phone Out
14.
Overheat
Sense
Speaker
Out
Bright
16.
Limiter
Active 2
Shape
Phantom
power
Summary of Contents for BHN450
Page 1: ...PROLUDE AMPLIFICATION BHV450 and BHV450L Bass amplifier User s manual...
Page 2: ...2 2...
Page 15: ...6 15...
