Lanzar Car Audio 440PSU - Manual (Page 3)

As in state-of-the-art home audio systems the optimum system requires a
dedicated preamp with enormous gain to drive the various power amplifiers.
Since home audio amplifiers do not have adjustable sensitivity, the require a
high output preamplifier to drive them to maximum levels.
This unit is the first production preamplifier to incorporate a specific
bandwidth parametric equalizer with shelving control. With 18dB boost or
cut on its four bands, it can compensate for acoustic anomalies unique
to the automotive environment. The
Vibe 440PSU easily becomes the
Control Center of any high-end mobile entertainment system.
EQUALIZER BACKGROUND
Frequency Bands
Boost/Cut
Signal-To-Noise Ratio
Frequency Response
Maximum Output Voltage
Total Harmonic Distortion
Input Sensitivity
Headroom
Input Impedance
Stereo Separation
Operating Voltage
Specifications
2
SUB 50Hz, LOW 210Hz, MID 1KHz, HIGH 20KHz
+/- 18dB
110dB Ref 1V Input
10Hz-15KHz, +/-1dB
7V rms
0.05%
150mV
20dB
10K ohms
82dB/1KHz
11-15V Negative Ground
There are basically three types of equalizers: graphic, parametric and a
hybrid of these two,often referred to as paragraphic. Additionally, there are
passive equalizers, which have no gain, active gain preamps, which have a
gain stage usually with a volume control, and booster equalizers which we
w o n , t c o n s i d e r h e r e s i n c e t h e y a r e i n f e r i o r p a s s i v e e q u a l i z e r s w i t h
inexpensive IC amplifiers built-in.