Presonus HP4

The RockBoard HA 1 in-ear monitoring headphone amplifier is the ideal companion for singers, keyboardists, drummers, guitarists, bassists and other musicians. It establishes the connection between the monitor signal from the mixing console, instrument or amp and your own headphones. Operation is child's play: simply activate the device with the volume control and set the desired volume for the headphone signal. With the stereo/mono source switch, which is easily accessible on the device, the RockBoard HA 1 can be adjusted to the available input signal. The extremely compact and lightweight aluminium housing is fitted with a clip for attaching to a belt or waistband. The HA 1 has a status LED which changes colour depending on the available battery voltage. Two AAA batteries (not included) provide up to 12 hours of power supply and the batteries can be changed in no time at all thanks to the practical battery compartment with clip fastener, which is accessible from the outside. The HA 1 is equipped with a combination socket for use with stereo jack (6.35 mm) and XLR cables for the input signal and a 3.5 mm stereo jack headphone output. On stage, in the rehearsal room or at home, the RockBoard HA 1 in-ear monitoring headphone amplifier always offers full control over the monitoring signal. In small clubs, in-ear monitoring improves the acoustics in the room, and when the band turns up the volume again, the signal is quickly adjusted and you can enjoy the same sound in every part of the room.

The robust and compact TIE Studio headphone amplifier can be used for up to four headphones for simultaneous monitoring of the main mix with separate volume selection. Four powerful, low-noise stereo amplifiers ensure first-class sound quality at any volume, whether for live or studio applications.

The LD Systems HPA 1 is a versatile headphone amplifier with high output power for stage, studio and home recording and the perfect connection solution for wired in-ear monitoring. The compact device in a robust, ergonomically shaped plastic housing with a soft-touch surface and practical belt clip is extremely well equipped.In addition to locking XLR connectors for balanced input of the stereo signal L/R, the HPA 1 has a 3.5 mm stereo socket as an aux input, which can be used in parallel for click or playback tracks. It is protected against excessive input levels for safe operation, and a hollow pin socket with negative internal contact enables the connection of a mains adapter in fixed mode.A 3.5 mm stereo socket serves as a headphone and earphone output. Level and balance can be adjusted using handy rotary controls, while a button switches from stereo signal to mono sum. A fully-fledged limiter is integrated for distortion-free playback and protection against feedback.The LD Systems HPA 1 has two-colour LEDs to provide an overview of its functions, which indicate the response of the limiter at peak levels and the battery level, among other things. At 165 grams, the headphone amplifier is extremely lightweight and can be operated for up to 12 hours with a high-quality 9V block.