Table of Contents
Advertisement
Dear customer,
Thank you for buying the Apex dBQ-zero. The dBQ-zero is a no-compromise 2-channel graphic equaliser with
supplementary filter sections. It is an excellent choice for live or installed sound reinforcement applications. A typical
application of the dBQ-zero would be to equalise monitor wedges.
As well as registering the product on-line, please take the trouble to record the serial number of the unit in the space
provided on the front cover of the manual, and keep the manual in a safe place.
Product highlights
• Constant-Q design for an accurate graphic representation
• Selectable boost/cut scale ±6 dB or ±15 dB
• 45 mm precision faders
• Equaliser bypass switch and automatic bypass in the event of
power failure
• Swept high-pass filters for removing unwanted low frequency
content
• Precise and deep notch filters for accurate feedback
suppression
• High and low shelving filters for smooth frequency adjustment
• Clear 10-segment level indicator with dedicated signal present
and clip LEDs
• Electronically balanced inputs
• High-quality, servo-balanced output stages, capable of driving
long cables
8
Foreword
On both equaliser channels, the 30-band Constant-Q graphic
EQ is complemented with a filter section consisting of a high-
pass filter, high and low shelving equalisers and two notch
filters. Shelving filters add 'warmth' and 'colour' to the mix.
A typical application for the frequency adjustable high-pass
filter is to remove hum or vibration transmitted by turntables.
Notch filters provide a quick and simple method of removing
noise or potential feedback frequencies.
The Constant-Q design preserves filter bandwidth independently
from amplitude and therefore minimises adjacent band-
interaction. The use of Constant-Q filters also ensures that the
composite filter response of the graphic EQ accurately follows
the physical positions of the front panel faders.
Front panel legending and controls are clear and straightforward.
Two 10-segment LED level indicators, each with dedicated
signal present and clip LEDs are available.
For convenience and to simplify installation in any application,
the dBQ-zero comes with balanced inputs and outputs on XLR,
6.35 mm jack and screw terminal connections.
Introduction
Advertisement
Table of Contents
