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Linea Research 88C06

SKU: 88C06

88C Series DSP Amplifier

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Linea Research 88C06 DSP Amplifier

Linea’s 88C Series of eight-channel amplifiers are optimized for use in installations. Combining massive power and peerless audio performance with unique DSP, the 88C Series also incorporates many features that ease its integration into both new and legacy systems, the 88C Series represents an unmatched advancement in amplifier technology.

88C Series Features

  • Eight 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
  • 3,000 to 20,000 watts RMS total output
  • Tamperproof front panel
  • Ethernet network for system operation and monitoring
  • Analogue, AES3 and optional Dante™ / AES67 digital network audio
  • Powerful grouping & multi‐layer EQ
  • Accepts 48kHz and 96kHz FIR files via System Engineer (certain models)
  • Fully designed and engineered in-house by Linea Research
  • Manufactured in the UK
RMS per channel, all 8 channels driven
Model2 Ohms4 Ohms8 Ohms70/100V
88C201500W2500W1500W2500W
88C101250W1250W1250W1250W
88C06750W750W750W750W
88C03400W400W400W400W

Linea’s 88C Series of eight-channel amplifiers are optimized for use in installations. Combining massive power and peerless audio performance with unique DSP, the 88C Series also incorporates many features that ease its integration into both new and legacy systems, the 88C Series represents an unmatched advancement in amplifier technology.

Sharing the same feature set and form factor as Linea’s 44C Series of four-channel amplifiers the 88C Series is available in models that develop between 400Watts and 2,500 Watts per channel (up to 5,000 Watts for a bridged pair). 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. This has been independently verified.

Linea can do this because state-of-the-art components and a finely optimized design results in an amplifier that is between 7% and 10% more efficient than any competitive product. This efficiency gain directly translates into the generation of about half the wasted energy (heat) which is clearly significant. 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.

Ethernet is used for remote control and monitoring while the tamper-proof front panel allows easy verification of the operating status and signal levels. Control via Linea’s intuitive Podware PC application provides many convenient and time-saving features such as very flexible management of presets, and Overlay grouping of Mutes, Gains, Delays, and EQ across an entire system. Control from 3rd party systems is also possible via TCP/IP, RS232, and RS485 while comprehensive relay and contact closure ports ensure that basic control can be achieved very easily.

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 handcrafted in-house by Linea, they are not available on products from any other manufacturer. For example, LIR linear phase crossover filters are as easy to use as more conventional filter shapes and have less latency than FIR filters. Also, the powerful VX Limiter suite sports Peak, RMS, and Excursion limiting, as well as multiband limiting for passive 2-way enclosures.

General Specifications­

Number of output channelsEight
Total power output, all channels driven20,000, 10,000, 6,000 and 3,000 Watts RMS
Audio inputs8x Analogue, 2x AES3 and 8x Dante™ / AES67 (factory fitted option)
Digital Signal ProcessingHigh-performance 96kHz DSP on all inputs and outputs
Control, monitoring, and system status alarmsEthernet network, RS232 & RS485 

Volt-free relay and contact closure ports. Heartbeat system health output

Power-save modesStandby after user defined time with fast wake up on audio 

Deep ECO sleep after user defined time with wake up on command

System standby and wakeupNetwork command, audio detection & contact closure

Power Output

Model88 C2088 C1088 C0688 C03
Power specificationRMS output power per channel, all channels driven with continuous program material and a nominal ambient temperature of 40ºC / 105ºF
Crest Factor of 4 (12dB), 2-Ohm nominal load1,500W1,250W750W400W
Crest Factor of 2.8 (9dB), 4-Ohm nominal load2,500W1,250W750W400W
Crest Factor of 2 (6dB), 8-Ohm nominal load1,500W1,250W750W400W
Bridged, per channel pair, 4 or 8-Ohm load3,000W / 5,000W2,500W1,500W800W
100V line (CV) operation, Crest Factor 4 (12dB)2,500W1,250W750W400W
70V line (CV) operation, Crest Factor 4 (12dB)1,937W1,250W750W400W
25V line (CV) operation, Crest Factor 4 (12dB)625W625W485W355W

Audio Performance

Amplifier topologyLinea Research high-performance Class D
Amplifier modulation schemeLow feedback, multiple loops, with feed-forward error correction
Dynamic range 

Measured relative to the amplifier output

Analog input, better than 113dBA typical 

AES / Dante™ input, better than 114dBA typical

Gain (with all the DSP level controls set to 0dB)32dB
Frequency response, 4 Ohm load<7Hz to >30kHz, 4 Ohms, -2.5dB points
Total harmonic distortion, THD<0.05% typical, 1kHz signal, AES17 filter, 4 Ohm load
Inter-channel crosstalk, worst-case combinationbetter than -85dBr at 1kHz and -75dBr at 10kHz
Slew rate>60V per microsecond typical
Damping factor (Ref 8 Ohms)>800 at amplifier output (see Linea’s “Damping factor debunked” white paper)
Maximum analog input level+20dBu
Analog input sensitivity range for full output0dBu to +20dBu, continuously adjustable
Analog input (four channels)Input 20k Ohm, electronically balanced, link directly connected to the input
Analog ground schemeAES48 standard compliant
AES3 input (two audio channels)Transformer isolated with unique active cable equalization for extended range
AES3 link (two audio channels)Active AES3 signal regeneration. Automatic direct bypass to the AES3 input ensuring the audio signal will still flow even when the amplifier is powered down
AES3 supported sampling rates24kHz to 192kHz (auto-locking)

Digital Signal Processing

Resolution40 bit, Linea Research proprietary algorithms
Sample rate96kHz throughout
Physical inputs to DSP drive modules8x analog, 2x AES & 8x Dante™ inputs can be routed to eight DSP drive modules
Drive module input processingInput signal routing, delay, gain, HPF, Phase, Mute 

EQ: 2x low shelf, 6x PEQ / bandpass, and FIR shelving filters

Drive module output processingSource, delay, gain, Phase, Mute, crossover filters, VX limiters 

EQ: low shelf, 8x PEQ / bandpass, and shelving filters

Preset management10 snapshots for device-wide setup, 50 presets for loudspeaker settings 

Presets can be recalled to sets of outputs or individual outputs as required

Unique high-performance processing
OverlaysTwelve additional independent overlays of EQ, Delay and Gain 

Flexible grouping for effective control of many amplifier channels in large systems

Class-leading VX limitersSee the ‘speaker protection systems’ section
Hardman crossover filtersBetter out of band rejection than Linkwitz-Riley
LIR crossover filtersUnique Linear Phase alignments without the compromises of FIR filters

Power Supply

Topology (main power supply)Linea Research high-performance Series Resonant
Topology (auxiliary and standby supplies)Low quiescent Eco-Flyback
Internally stored energy>600 Joules
Nominal mains input voltage range85V to 240V, the Power supply automatically detects the voltage and configures accordingly
Mains input frequency range47Hz to 63Hz
Mains inrush current (max for <10ms)6A at 115V, 12A at 230V

Protections Systems

Under all circumstances the control and protection systems will endeavor 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, and normal operation automatically resumes when the condition clears.
System protectionSpeaker protection
Excessive power supply current or amplifier output currentSustained clipping prevention
Excessive temperature per sub-system: PSU, amplifier, and DSPDC offset protection
Mains voltage within acceptable limitsExcessive HF energy (VHF) limiter
Internal power rails producing correct output 
Fans operating at the correct speedVX audio output limiters
Vx provides a linear phase virtual crossover and two limiter paths on each output. This unique system delivers effective protection for systems that incorporate passive crossovers.
Power distribution protection systemsVx Limit      Multiband peak limiter, two per output
Mains inrush current limiting for soft start and anti-surgeVx Max       Multiband overshoot limiter, two per output
Mains average current limiting for mains breaker managementX-Max         Driver excursion limiter
Randomized initialization when remotely powered upT-Max         Driver thermal limiter (long-term power limiter)
 
Monitoring, measurements recorded against timeMonitoring, device statistics, and counters
Supply currentNumber of power cycles counted
Supply voltageNumber of mains brownout events counted
Thermal CapacityFan speeds are continuously monitored
Each driver currentFan under-speed events counted
Each driver impedanceVarious protection mute events counted
Protection limiting for each outputDriver Impedance continuously monitored
An inbuilt notification system is provided that indicates problems to remote devices either via the network or the Volt-free changeover relay contacts accessible on the rear panel.

Physical

CoolingDual vari-speed fans, front-to-back airflow. Washable, toolless change filter media.
Analogue IN and LINKPhoenix™ pluggable terminal block (mating plug supplied)
AES3 IN and LINKPhoenix™ pluggable terminal block (mating plug supplied)
Amplifier outputNeutrik Speakon™ NL4 connectors
Mains input connectorNeutrik 32A Powercon™
Dante Primary and Secondary2x Shielded RJ45
Ethernet networkShielded RJ45
RS232 and RS485Phoenix™ pluggable terminal block (mating plug supplied)
Relay, ‘heatbeat’ outputsPhoenix™ pluggable terminal block (mating plug supplied)
Contact closure inputsPhoenix™ pluggable terminal block (mating plug supplied)
Front panel LED indicatorsPer channel – Input level, output level & status
Enclosure, all modelsStandard 19” 2U (88mm), 357mm (14”) deep with handles and optional rear support
Net Weight12.5kg (27.5 pounds).

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