Bosch LBB 1968/00 Plena Feedback Suppressor

Bosch LBB 1968/00 Plena Feedback Suppressor

Bosch LBB 1968/00 Plena Feedback Suppressor

B&H # BOLBB196800U MFR # F.01U.080.428
Bosch LBB 1968/00 Plena Feedback Suppressor

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Product Highlights

  • Patented Feedback Suppression Algorithm
  • Suppresses Feedback Before It Occurs
  • Auto Adapts to Each Acoustical Situation
  • Additional 12dB of Gain Before Feedback
  • Balanced Line/Mic In with Phantom Power
  • Second Mic Input with Automatic Mixer
  • Adaptive Filter with Fast/Accurate Modes
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Bosch LBB 1968/00 overview

  • 1Description

The Bosch LBB 1968/00 Plena Feedback Suppressor can greatly reduce the risk of acoustic feedback when using a PA system. It does this by using a powerful DSP with a patented algorithm. The unit actively filters out unwanted room reverberations with an echo-cancellation feature and dereverberation algorithm. The device can add a little inaudible noise or shift the output frequency by five hertz. By doing this, it's able to detect the reverb component of the signal and remove it before feedback occurs - leaving the original signal intact.

The Plena Feedback Suppressor also features an adaptive filter, which can be switched between fast and accurate modes. The fast mode is ideal for situations where the microphone is changing positions over time, while the accurate mode is ideal for situations where the microphone keeps a fixed position and the acoustical environment is more stable. This allows the adaptive filter to converge more slowly, suppressing feedback causing reverberations more effectively. Plus, depending on the environment and whether you've selected the fast or accurate mode, up to 12dB of gain can be added before your system starts to feedback.

There's a built-in automatic mixer as well. The mixer is designed for the two microphone inputs. If you're using both mic inputs simultaneously, the chances of feedback are higher. The automatic mixer reduces the gain of the mic with the lowest signal input and increases the gain of the mic with the highest signal input. This keeps the combined gain constant and provides optimal speech intelligibility for the moving speaker. This feature works even when the feedback suppressor is deactivated.

Patented feedback suppression algorithm
Suppresses feedback before it occurs
Automatically adapts to the acoustical situation
Up to 12 dB additional gain before feedback occurs
Balanced line or microphone input with phantom supply
Second microphone input with automatic mixer
UPC: 800549175838
In the Box
Bosch LBB 1968/00 Plena Feedback Suppressor
  • Power Cord
  • 19.7" (50 cm) XLR Cable
  • Plena CD
  • Set of 19" (48.3 cm) Mounting Brackets
  • 3-Year Warranty
  • Table of Contents
    • 1Description

    Bosch LBB 1968/00 specs

    Sample Rate 32 kHz
    Frequency Response 125 Hz - 15 kHz
    Distortion <0.1% @ 1.0 kHz
    Gain Bypass Mode: 0 dB line in, 24 / 36 / 48 dB mic in
    Active Mode: 0 dB line in, 24 / 36 / 48 dB mic in
    Signal-to-Noise Ratio >90 dB
    Signal Delay <11 ms
    Decorrelator Frequency Shift 5 Hz Up / Masked Noise
    Mic/Line Input Connectors: 3-pin XLR balanced / 5-pin DIN balanced
    Max level: 18 / 6 / -6 dBV line in
    Max level: -18 / -30 / -42 dBV mic in
    Impedance: 10 kohm / 2 kohm (line / mic)
    CMRR: >25 dB (50 Hz to 20 kHz)
    Phantom Power: 16 V (mic only, switchable)
    Priority Control: loop through of pin 4 & 5 of DIN
    Mic Input Connectors: 3-pin XLR balanced / 5-pin DIN balanced
    Max level: -18 / -30 / -42 dBV mic in
    Impedance 2 kohm
    Phantom Power: 16 V (switchable)
    Priority Control: loop through of pin 4 & 5 of DIN
    Line Input Connector: Cinch (unbalanced)
    Max Input Level: 18 / 6 / -6 dBV
    Impedance: 20 kohm
    Line Output Connector: 3-pin XLR (balanced)
    Max Level: 18 / 6 / -6 dBV (line in)
    Max Level: 6 dBV (mic in)
    Impedance: <100 ohm
    Line Output Connector: Cinch (unbalanced)
    Max Level: 18 / 6 / -6 dBV (line in)
    Max Level: 6 dBV (mic in)
    Impedance: <100 ohm
    Mic Output Connector: 5-pin DIN (balanced)
    Max Level: 22 / -34 / -46 dBV (line in)
    Max Level: 34 dBV (mic in)
    Impedance: <100 ohm
    Priority Control: loop-through of pins 4 and 5 of DIN from inputs
    Certifications Europe: CE / Declaration of Conformity
    Safety: acc. to EN 60065
    Immunity: acc. to EN 55103-2
    Emission: acc. to EN 55103-1
    Mounting Stand-Alone 19" (48.3 cm) Rack / 1U High
    Color Charcoal
    Operating Temperature 14 to 131°F (−10 to 55°C)
    Storage Temperature −40 to 158°F (−40 to 70°C)
    Relative Humidity <95%
    Power Requirements 115/230 VAC (±10%, 50/60 Hz)
    Inrush Current 3.0 A @ 115 VAC
    1.5 A @ 230 VAC
    Power Consumption 50 VA (max)
    Dimensions (HxWxD) 2.2 x 16.9 x 10.6" (5.6 x 43.0 x 27.0 cm)
    Weight 6.6 lb (3.0 kg)
    Packaging Infoswdvyxec
    Package Weight 10.7 lb
    Box Dimensions (LxWxH) 22.5 x 14.0 x 8.5"

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