T-44/48 Series Operation Manual
47
T-44/48 Series | rev.
firm. 1.258 and above
Digital processing
Resolution
40 bit, using proprietary LMD (Linea-Micro-Detail) algorithms.
Sample rate
96kHz throughout.
Special functionality:
Class leading limiter suite
See the ‘speaker protection systems’ section.
Hardman crossover filters
Better out of band rejection than Linkwitz-Riley (Unique to Linea).
LIR crossover filters
Linear Phase without the compromises of FIR filters (Unique to Linea).
FIR Shelving EQ filters
For linear phase filtering.
Overlays
Twelve additional independent overlays of EQ, Delay and Gain.
Power supply
Topology (main power supply)
3rd generation Series Resonant.
Topology (auxiliary and standby supplies)
Low quiescent Eco-Flyback.
Internally stored energy
>600 Joules.
Mains input voltage range (automatically configured)
85V to 240V.
Mains input frequency range
47Hz to 63Hz.
Mains inrush current (max for <10ms)
6A at 115V, 12A at 230V.
Protection systems
Note:
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 output current
Audio soft-clip limiter
Excessive power supply current
VxLim, Multiband peak limiter
(Unique to Linea)
Excessive amplifier section temperature
VxMax, Multiband overshoot limiter
(Unique to Linea)
Excessive power supply section temperature
Vx-Xmax, Driver excursion limiter
Excessive DSP section temperature
Vx-Tmax, Driver thermal limiter
(long term power limiter)
Mains voltage out of range
DC offset protection
Fan speeds out of range
Excessive HF energy (VHF) limiter
Internal power rails out of range
Power distribution protection systems
Mains inrush current limiting (soft start and anti-surge).
Mains average current limiting (mains breaker / fuse trip protection).
Randomised initialisation when powered up to reduce the peak power demand in large systems.
Monitoring and logging
Supply current logged vs. time
Number of power cycles counted
Supply voltage logged vs time
Number of mains brownout events counted
Thermal Capacity logged vs time
Fan speeds continuously monitored
Each driver current logged vs time
Fan underspeed events counted
Each driver impedance logged vs time
Various protection mute events counted
Protection limiting for each output logged vs time
Driver Impedance continuously monitored