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Pettersson L400 Ultrasound Speaker


197657 | Availability: Usually dispatched within 5 days Details
NHBS Price: £1,315.00 inc VAT $1609/€1474 approx

About this product

The L400 is an ultrasound loudspeaker with a built-in amplifier that can be connected to any recording device capable of playing ultrasonic signals. The speaker is most effective when used with recording/playback devices which are purposely designed for ultrasound signals, such as bat detectors. However, a computer with a high performance sound card (192 kHz sampling rate) may also be used and most will play sounds of up to 85-90 kHz. (Please note that this will only work if sound files have a sampling rate which is supported by the sound card. If the file is a time-expanded or high-speed recording, re-sampling of the file to match the rate of the sound card will be required in order for it to be played correctly).

The L400 is a great teaching aid giving students the ability to listen to recorded bat calls from the loudspeaker using their bat detectors.

The speaker can also be used effectively as an acoustic lure when detecting in the field. Please note, however, that a license is always required to use a lure for bats.


* Ultrasound loudspeaker with integrated 14 W amplifier
* Frequency range: 10 kHz - 110 kHz
* Powered from 8 x AA cells (built-in) or 12 - 28 V external power supply
* Max. output level: > 100 dB @ 1 m (at 28 V supply voltage)
* Volume control
* Level indicator
* Rugged aluminium housing
* Size: 24 x 16.5 x 7 cm
* Weight: 1.6 kg, incl. batteries


Power Options

Duracell AA Alkaline Battery (LR6): 4 Pack

The L400 speaker requires eight AA batteries

NHBS Price: £3.49 inc VAT $4/€4 approx


Pettersson L60 Ultrasound Speaker

For educational use and testing of bat detectors, the L60 Ultrasound Speaker is a more economical choice

NHBS Price: £142.99 inc VAT $175/€160 approx

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