Both the GR3 and GR4 are 1U rack-mounting audio mixers, with standout features that include an easy access mic input on the front panel for announcements and paging, zonal auto-ducking for paging and emergencies, and optional wallplates for remote control. The innovative control layout allows system integrators to manage which controls are accessible for everyday use.
The GR3 has two mic inputs and two stereo inputs, and the GR4 has four mic inputs and four stereo inputs. Additionally, the GR4 has a 3.5mm jack on the front to connect portable music sources, such as an iPod. Both units have two stereo zones, and an additional two mono zone outputs are available on the GR4.
There is individual mix and selectable control of all inputs to zone 1 and 2, and multiple options for configuring mix outputs to zones 3 and 4 via internal jumpers. Additionally, gain and 2 band EQ is available on all mic inputs with a 2-band EQ available on zones 1 and 2 outputs. There is automatic ducking in primary and secondary mic mode, as well as emergency mic mode, and juke box mode. Ducking parameters, such as attenuation, hold and release can be adjusted by entering "programming mode" which also allows control over line input crossfade times and the priority line inputs hold and release times.
It is possible to connect up to two PL-14 wallplates or other analogue remote controllers, and paging and alarm contact inputs allow integration to third party paging stations and fire alarm systems.
Allen & Heath's installation sector specialist, Ian Thomas, says, "The GR3 and GR4 add to our successful range of analogue installation mixers, offering the same no-compromise build and sound quality that made GR popular with consultants and integrators around the globe but with carefully targeted features, a new style, redesigned interface and highly competitive price point."
(Jim Evans)
