Bosch LBB 1968/00 Plena Feedback Suppressor
- Price: $858.00
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Availability Details
CloseThis is a special order item and is non-cancelable and non-returnable. Est. arrival at B&H is 7-14 business days (subject to availability). Your order will be charged at time of shipment.
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- B&H # BOLBB196800U
- Mfr# F.01U.080.428
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
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
Go To
| Performance | |
|---|---|
| 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 |
| Connectors | |
|---|---|
| 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 |
| General | |
|---|---|
| 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) |
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