The LRF-04 frequency filter sound level logger/limiter spectrally controls the entire sound chain in octave bands. The unit consists of an integrating-averaging frequency band (octaves) sensor and an attenuator of over 40 dB, which functions by analysing and calculating the power of the octaves in real time, taking full advantage of the insulation of the room and achieving maximum sound pressure without either disturbing the neighbours or modifying the reproduction quality (it is not a compressor).

The room´s sound pressure level, the automatic attenuation level, the date, incidents and the operation mode are permanently displayed on the screen.

The LRF-04 has a permanent memory to store the programming information and data obtained during the past 60 days, even when disconnected from the electricity supply. There is also a battery available to continue storing information for over 1 day without connection to AC power.

NOTE: This model has the Extraneous Noise Override System (ENOS) option, specially designed for the local music reproduction with high ambient noise level: bars, pubs, restaurants etc. The unit does not cut the music. With ENOS, the limiter controls the music so that it never exceeds the programmed limit, regardless of the noise generated by customers

Product Highlights

• Control by emission Sound Pressure Level or reception SPL (insulation)
• It registers all incidents
• It can be completely sealed
• Adaptable to any kind of regulation
• It does not cut out the music, with the ENOS option, the reproduction of music in venues such as bars, pubs and cafés is possible
• Internal Battery
• Data retrieval by LCD Screen, printer, serial connection with PC and modem
• Control noise from: discos, theme parks, exercise studios, sports stadiums etc.

Supplied accessories

• LXM-8: Sensor for LRS-03, LRF-04, LRF-05 limiters and RS-60 recorder

• CNOMX9: Cable to connect the sensor to a limiter or register (9m connectors included)

• SFTL04: Communication and data retrieval software for LRF-04

DL-3E external display unit Hand held external display with cable (10m)

DL100 External Display Giant external display of 61x32x8 cm with digits of 10x6.5 cm with 10m cable .