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RUKO SPB-DIN340-4,5mm-SB Speaker Protection Board for Hi-Fi Amplifiers, Stereo, DC Protection, Turn-on Delay

RUKO SPB-DIN340-4,5mm-SB Speaker Protection Board for Hi-Fi Amplifiers, Stereo, DC Protection, Turn-on Delay
RUKO SPB-DIN340-4,5mm-SB Speaker Protection Board for Hi-Fi Amplifiers, Stereo, DC Protection, Turn-on Delay
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R369
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For DIY audio enthusiasts and repair technicians building or upgrading Hi-Fi amplifiers, the RUKO GMBH SPB-DIN340-4,5mm-SB speaker protection board safeguards speakers from harmful DC voltage and power-on thumps. This stereo module connects between the amplifier output and speakers using screw termi... Read More
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Stock 80 Code 3555451 Brand RUKO GMBH Model 1000029110 Warranty 2 Years

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Estimated delivery Thursday, October 8
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For DIY audio enthusiasts and repair technicians building or upgrading Hi-Fi amplifiers, the RUKO GMBH SPB-DIN340-4,5mm-SB speaker protection board safeguards speakers from harmful DC voltage and power-on thumps. This stereo module connects between the amplifier output and speakers using screw terminals, and it requires a 12-15 V AC or 15-20 V DC supply.

Key specifications

  • Stereo (2-channel) speaker protection
  • DC voltage protection and turn-on/off thump suppression
  • Turn-on delay: approx. 3 seconds
  • Relay contact rating: 250 V AC / 30 V DC, 10 A max switching current
  • Power supply: 12-15 V AC or 15-20 V DC via screw terminals
  • Input/output connections: screw terminals
  • Mounting: PCB with mounting holes
  • Board material: FR-4

Why choose it

This board prevents speaker damage by disconnecting the load if DC offset exceeds 1 V, and it eliminates pops during power cycling. Its relay-based design handles high currents, making it suitable for demanding amplifier projects.

Ideal use cases

  • Hi-Fi amplifier builds and repairs
  • DIY audio projects requiring speaker protection
  • Upgrading vintage amplifiers with modern protection

Good to know

The board is supplied as a bare PCB with components, ready for integration into your amplifier chassis. Screw terminals allow secure wiring without soldering.

Specifications
AC input voltage
12-15 V AC / 15-20 V DC
Amplifier class
Not applicable
Audio (L/R) in
Yes
Audio (L/R) out
Yes
Audio output channels
2.0
Brand
RUKO GMBH
Bridge-mode power output per channel (4 Ohm)
Not applicable
Bridge-mode power output per channel (8 Ohm)
Not applicable
Category
Speaker Protection Board
Connectivity technology
Wired
DC-in jack
Yes
EAN
4007140106360
Frequency band
Not specified
Frequency range
Not specified
Headphone connectivity
Not applicable
Headphone outputs
0
LED indicators
Yes
Material
FR-4
Model
1000029110
MPN
1000029110
Purpose
Home
Remote control type
Not applicable
RMS power output per channel (8 Ohm)
Not applicable
Signal-to-Noise Ratio (SNR)
Not specified
Speakers connectivity type
Screw terminals
Total Harmonic Distortion (THD)
Not specified
Volume control
No
Weight
0.07 kg
Price history over the last 6 months
RUKO SPB-DIN340-4,5mm-SB Speaker Protection Board for Hi-Fi Amplifiers, Stereo, DC Protection, Turn-on Delay
Current
R369
Lowest
R337
Highest
R369
Change 24H
+R32   +9%
Week
—   
Month
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