Brochure

The Solid Foundation:
Lab.gruppen Core Technologies
Reliability, durability, sound quality and pure power remain the fundamentals for any touring amplifier, and in this
regard PLM+ rigorously maintains Lab.gruppen’s industry-leading reputation.
Key Lab.gruppen technologies incorporated in the PLM+ Series platform include:
+ Regulated Switch-Mode Power Supply (R.SMPS)
A fully regulated design that connects to any mains supply
in the world and ensures stable output power independent
of deviations in the mains voltage
+ Under-Voltage Limiting (UVL)
Allows continued operation despite severe voltage drops
+ Best-in-class Power Factor Correction (PFC)
Unique Current Draw Modelling (CDM™) reduces peak
current draw from the mains supply; inherent rail regulation
maintains stable rail voltages during extended bursts
+ Patented Class TD® Output Stage
(20K44 and 12K44)
Combines the efficiency of Class D with the sonic
qualities of Class B topologies.
+ Inter-Sample Voltage Peak Limiter (ISVPL™)
Digitally controlled broadcast quality peak limiter with
exceptional accuracy for maintaining sonic purity
+ Intercooler® Cooling System (20K44 and 12K44)
Equipped with the extraordinarily efficient copper-finned
Intercooler system, PLM+ amplifiers expel heat more
efficiently, eliminating ‘end of tunnel’ output device over-
temperature problems
+ Breaker Emulation Limiter (BEL)
Prevents mains fuse tripping
+ Full Suite of Protection Features
Thermal ‘show-must-go-on’ Limiting, Very High Frequency
Protection (VHF), Direct Current Protection (DC), Short Circuit
Protection, Current Clip Limiter, Voltage Clip Limiter
Regulated Switch-Mode Power
Supply (R.SMPS)
Internal view of the 12K44 and 20K44