Linea’s XiB4 is a four-channel amplifier suitable for use anywhere a powerful, clean sounding product with inbuilt DSP is required. Equally at home in portable PA, conferencing, and contractor environments the XiB4 is the perfect choice in any application where being tamperproof is important.
Remote operation is possible with Linea’s intuitive System Engineer 7 PC application over BvNet, Linea's installation friendly network. BvNet is an RS485 based system that allows many XiB4 amplifiers to be ‘daisy chained’ over hundreds of metres using low-cost cables and without the need for network switches etc. Integration with other parts of a system is possible using dimple contact closure ports and Linea offer a range of interface units that allow seamless connection to Ethernet and Dante.
The XiB4 also provides extensive fault and status logging including driver integrity monitoring. These facilities are usually only associated with expensive specialised products, and this is the first time that they have been made available as standard features for no additional cost.
The advanced 96kHz DSP is fully integrated into the product and provides an array of unique and genuinely useful features. Because all aspects of the DSP algorithms are designed and hand crafted in house by Linea, they are not available on products from any other manufacturer. For example, LIR linear phase crossover filters which are as easy to use as more conventional filter shapes and have less latency than FIR filters.
Each of the XiB’s four channels can deliver 1,250 Watts RMS into 2 Ohms continuously, or up to 2,500 Watts into 4 Ohms for a bridged pair of channels. Unusually these are not, ‘transient’, ‘burst’ or ‘peak’ power figures, they are the power levels that are delivered by all channels simultaneously even when driven with the same dense program material.
With Linea amplifiers there is no need to ration power between channels, you can use all the power you have paid for all the time.
Linea can do this because state of the art components and a finely optimised design results in an amplifier that is more efficient than competitive products. This efficiency gain directly translates into the generation of less wasted energy (heat). In addition to reducing energy costs high efficiency results in generous power reserves ensuring that pristine sound quality is maintained even under the most extreme conditions.
“Only compatible with System Engineer 7”
Product Features
- Four channels of sonically pure Class D amplification
- Unique, precise, 96kHz digital signal processing
- Over‐designed switch mode power supply
- 85V to 240V Auto-sensing PSU
- 5,000 watts RMS total output
- Tamper proof front panel
- USB and BvNet network operation
- Powerful grouping & multi‐layer EQ
- Fully designed and engineered in house by Linea Research
- Manufactured in the UK
Product Specifications
General
- Number of output channels: Four
- Total power output, all channels driven: 5,000 Watts RMS
- Audio inputs: 4x Balanced Analogue
- Digital Signal Processing: High performance 96kHz DSP on all inputs and outputs
- Control, monitoring and system status: USB and BvNet (optimised RS485)
- Contact closure ports for voice recall and system shutdown
- Power-save modes: Standby after user defined time with fast wake up on audio detection or from a network command
Power Output
- Power specification: RMS output all channels driven with continuous program material and a nominal ambient temperature of 40ºC / 105ºF
- Crest Factor of 4 (12dB), 2-Ohm nominal load: 1,250W per channel:
- Crest Factor of 2.8 (9dB), 4-Ohm nominal load: 800W per channel: 2,500W per bridged pair
- Crest Factor of 2 (6dB), 8-Ohm nominal load: 450W per channel: 1,600W per bridged pair
- 25V line (CV) operation, Crest Factor 4 (12dB): 625W per channel:
- 70V line* (CV) operation, Crest Factor 4 (12dB): 1,250W per channel *can drive 70V line to -2dB max.: 2,500W per bridged pair
- 100V line* (CV) operation, Crest Factor 4 (12dB): 1,250W per channel *can drive 100V line to -5dB max.: 2,500W per bridged pair
Audio Performance
- Amplifier topology: Linea Research high performance Class D
- Amplifier modulation scheme: Low feedback, multiple loop, with feed-forward error correction
- Output noise, ref. maximum amplifier output: Better than 106dBA typical, unmuted
- Gain (with all the DSP level controls set to 0dB): 27dB
- Frequency response, 4 Ohm load: 20Hz to 20kHz, +/-0.5dB
- Total harmonic distortion, THD: <0.05% typical, 1kHz signal, AES17 filter, 4Ohm load
- Inter-channel crosstalk, worst case combination: better than -80dBr at 1kHz
- Slew rate: >25V per microsecond typical
- Damping factor (Ref 8 Ohms): >100 at amplifier output (see Linea’s “Damping factor debunked” white paper)
- Maximum analogue input level: +20dBu
- Analogue input sensitivity range for full output: 0dBu to +20dBu, continuously adjustable
- Analogue input (four channels): Input 10k Ohm, electronically balanced, link directly connected to input
- Analogue ground scheme: AES48 standard compliant
Digital Signal Processing
- Resolution: 40 bit, using Linea Research proprietary algorithms
- Sample rate: 96kHz throughout
- Input processing, per channel:
- Input signal routing, Delay, Gain, Phase, Mute
- EQ: 4th order HPF, 4th order LPF, 8x Parametric, Low and High shelving filters
- Output processing, per channel:
- Source, Delay, Gain, Phase, Mute, up to 8th order crossover filters, intelligent limiter
- EQ: 6x Parametric , Low and High shelving filters
- Crossover filter types: Bessel, Butterworth, Linkwitz-Riley, Hardman (Like Linkwitz-Riley but with better out of band rejection)
- Pre-set management: 4 voice pre-sets per channel pair, selected by contact closure
Power Supply
- Topology (main power supply): Linea Research high efficiency Series Resonant
- Nominal mains input voltage range: 85V to 240V, Power supply automatically detects voltage and configures accordingly
- Mains input frequency range: 47Hz to 63Hz
- Mains inrush current (max for <10ms): 23A at 115V, 46A at 230V
Protections Systems
Under all circumstances the control and protection systems will endeavour to deliver the maximum power possible for a given set of conditions, applying limiters only in extreme circumstances. Muting will only occur when a dangerous situation is detected, normal operation automatically resuming when the condition clears.
- System protection: Speaker protection
- Excessive power supply current (per channel pair): Sonically clean audio limiter
- Excessive internal temperature (per channel pair): DC offset protection
- Mains voltage within acceptable limits: Internally stored information
- Output current within limits (each channel): Log of temperature over time
- Driver impedance within limits (each chanel): Log of protection gain reduction over time
- Power throughput within limits (each channel): Log of output current over time (each channel)
- Switch on mains surge: Power cycle count
An inbuilt notification system is provided to indicate problems to remote devices via the network
Physical
- Cooling: Vari-speed fans, back to front airflow
- Analogue IN and LINK: 4x female and 4x male Neutrik™ XLR
- Amplifiers output: 4x Neutrik Speakon™ NL4 connectors
- Mains input: Neutrik 20A Powercon™
- USB: Standard USB ‘B’
- Network (BvNet): RJ45 in with RJ45 daisy chain link
- Contact closure and shutdown inputs: RJ45 in with RJ45 daisy chain linkLED indicators: Bright, easily differentiated
- Operating temperature range and humidity: 0 to +40ºC, (+32 to +105ºF) 0 to 80% RH (non-condensing)
- Enclosure: Standard 19” 2U (88mm), 360mm (14”) deep (from rear panel to front rack support)
- Optional accessories: Rear rack support kit
- Net Weight: 9.5kg (20 pounds).
