The SPL-D3 is an advanced audio level display that stores the sound level samples for at least twelve months. The sound level samples can be viewed using the configuration software or externally stored through on a USB FAT32 drive. Other important data is also stored like powering up, sanctions or possible tampering. Using the configuration software the SPL-D3 can be read out and adjusted. On release Windows 7 platforms and later are supported. All users can only view settings and logging. To adjust configuration settings an additional password and license file is required. To connect to the SPL-D3 a windows computer with USB support is required. The SPL-D3 uses a measurement microphone to determine the actual sound level. When measurement shows the sound levels are about to exceed, the display will change from green to orange and red when levels are actually exceeded. The special calender functions allow for different sound levels during the day and year. With the special SRL-1 circuit breaker an external warning light can be connected along the the main power supply for example the DJ booth monitor. This way the maximum sound level is always insured without touching the sound quality. Theatre mode disables the display while sound level is normal. Only on (possible) exceeding the maximum set sound level, the display will turn on again.

The SPL-D2MKII is a sound-level display unit. This unit can be used as a stand-alone device, or it can be connected to the SPL5TS limiter. The display is built-up with hi-efficiency bi-color LEDs, so that it is clearly readable from a distance. When connected to the SPL5TS the display value is read from the SPL5TS limiter. The bar can be used as a soundlevel indication bar, or as an attenuation bar. When used as a stand-alone unit the measuring microphone must be connected. The display shows the actual measured value. When the value crosses the pre-defined level the display color switches from green to red. This can be used as an indication for a live-band. When using a measuring microphone three measuring curves can be selected (ANSI-A, ANSI-B, ANSI-C) and changed by using the SPL-D2MKII configuration software.

The SPL3 is a limiter with a microcontroller continuously measureing the input-level and attenuating the output level as much as necessary to keep the sound level below the given threshold. The SPL3 has the ability to adjust the sound-level (actual output-level) and the threshold (input sensitivity). It also features a dedicated microphone input for the included measuring microphone. With the microphone connected the SPL3 has the possibility to measure the audio-level from live-bands etc. This measuring microphone makes the SPL3 the ideal limiter for live performances where the band uses its own PA system. When, in live mode, the sound-level exceeds the threshold, the limiter can give a warning to the band (with a flashing light). If the sound-level remains too loud for a longer period of time the limiter will activate the sanction output and can, if desired, cut-off the mains supply of the band. All the connectors, the sound-level and threshold controller are inaccessible after the limiter is sealed.

The SPL3TS is a limiter with a microcontroller continuously measureing the input-level and attenuating the output level as much as necessary to keep the sound level below the given threshold. The TS version is equipped with a timer for time based level control. The SPL3TS has the ability to adjust the sound-level (actual output-level) and the threshold (input sensitivity). It also features a dedicated microphone input for the included measuring microphone. With the microphone connected the SPL3TS has the possibility to measure the audio-level from live-bands etc. This measuring microphone makes the SPL3TS the ideal limiter for live performances where the band uses its own PA system. When, in live mode, the sound-level exceeds the threshold, the limiter can give a warning to the band (with a flashing light). If the sound-level remains too loud for a longer period of time the limiter will activate the sanction output and can, if desired, cut-off the mains supply of the band. The SPL3TS has a built in clock/ timer. This makes it possible to program a completely different sound level at different periods of the day. The built in calendar allows you to program a list of 10 dates to switch the limiter to bypass automatically. All these settings can be adjusted by using the PC-software. But before it becomes possible to make any changes this software has to be registered; this makes it impossible for un-authorised people to alter the limiters configuration. All the connectors, the sound-level and threshold controller are inaccessible after the limiter is sealed.

The SPL5 MKII can be used in live-situations to monitor the audio level produced by a live-band, and sanction is necessary by cutting off the mains voltage or give an optical indication to the band. In a non-live situation, so music played over the PA-equipment the SPL5 is inserted after the mixer, and before the amplifiers. It uses the microphone to determine the audio level, and attenuates the output level is required. The SPL5 stores the sound-level data, and event history over a period of two months. Besides a limiter the SPL5 acts as a decibell logger. With the PC-software the limiters memory can be read out. Configuring the limiter is done with the same software. But before it becomes possible to make any changes this software has to be registered; this makes it impossible for un-authorised people to alter the limiters configuration. This PC-software makes it possible to control the limiter over a computer-network, and even over the Internet!

The SPL2TS is the basic version equipped with time slots which guards the sound pressure level under all circumstances. It offers the most cost effective solution to sound level problems. The limiters’ microcontroller continuously measures the input-level and attenuates the output level as much as necessary to keep the sound level underneath the given threshold. Because the SPL-limiters are no peak limiters the dynamics of the music remains unchanged. The SPL2TS has the ability to adjust the sound-level (actual output-level) and the threshold (input sensitivity). All the connectors, the sound-level and threshold controller are inaccessible after the limiter is sealed. The SPL2TS has a built in clock/ timer. This makes it possible to program a completely different sound level at different periods of the day. The built in calendar allows you to program a list of 10 dates to switch the limiter to bypass automatically. All these settings can be adjusted by using the PC-software. But before it becomes possible to make any changes this software has to be registered; this makes it impossible for un-authorised people to alter the limiters configuration. This limiter is recommended as ‘the best’ by an increasing number of professional sound system installers.

The SPL6 is an advanced audio level limiter that stores the sound level samples for at least twelve months. The sound level samples can be viewed using the internal web pages or externally stored through automatic email. Other important data is also stored like powering up, sanctions or possible fraud attempts. Using the web interface the SPL6 can be read out and adjusted. There is no separate platform depended software required. All users can only view settings and logging. To adjust configuration settings an additional password and license file is required. To connect to the SPL6 a computer or tablet must be equipped with a network connection. When connected to a network or the Internet, the SPL6 can be remotely monitored. The SPL6 uses a measurement microphone to determine the actual sound level. When measurement shows the sound level exceeding the maximum set level, it will reduce slowly the full sound spectrum to the maximum allowed level. In multiband mode the SPL6 will slightly reduce the single frequency band before adjusting the full spectrum. With the special correlation detection the SPL6 detects external noise pollution and can ignore for example applauding or screaming audience. This way the maximum sound level is always insured. The special calender functions allow for different sound levels during the day and year.

The SPL2 is a basic limiter which guards the sound pressure level under all circumstances. It offers the most cost effective solution to sound level problems. The limiters’ microcontroller continuously measures the input-level and attenuates the output level as much as necessary to keep the sound level underneath the given threshold. Because the SPL-limiters are no peak limiters the dynamics of the music remains unchanged. The SPL2 has the ability to adjust the sound-level (actual output-level) and the threshold (input sensitivity). All the connectors, the sound-level and threshold controller are inaccessible after the limiter is sealed. This limiter is recommended as ‘the best’ by an increasing number of professional sound system installers.