The fP 6400 is a lightweight and space-saving power amplifier, ideal for use in high quality touring sound systems as well as in demanding permanent installations.

Heat and cooling are fundamental problems in extreme high power amplifiers such as the fP 6400. Already in 1990, Lab.gruppen patented a high efficiency amplifier, in fact an evolution of the Class D amplifier. Lab.gruppen therefore call it Class TD. It attains the same high efficiency as Class D, but avoids its drawbacks. Class D has a power-amplifier topology using Pulse Width Modulation (PWM) to achieve high efficiency, but it needs a recovery filter between the output stage and the loudspeaker. Lab.gruppen’s Class TD amplifiers do not need this filter and this is one reason why the Lab.gruppen Class TD obtains the same sonic quality as a traditional Class AB amplifier.




◆  Compact design, 2U high
◆  Low weight, 10 kg (22 lbs)
◆  MLSTM Switch: Lab.gruppen’s unique power matching for different loads
◆  Multiple positions gain switch
◆  Intercooler® cooling system with front-to-rear airflow and easily accessible dust filters
◆  Improved low-end power bandwidth
◆  Link connector with XLR-type connector
◆  Bridged mono outputs in one Speakon® connector
◆  Extruded front panel for increased stability

2 ✕ 1300 watts @ 8 Ω
2 ✕ 2300 watts @ 4 Ω
2 ✕ 3200 watts @ 2 Ω (Measured just below clip level, with both channels driven)