H 500 Esprit Overview - HELIX H 500 ESPRIT Instruction Manual

H 500 ESPRIT
1 Connecting the remote lead
The remote lead is connected to the automatic antenna
(aerial positive) output of the head unit (radio). This is only
activated if the head unit is switched ON. Thus the ampli-
fier is switched on and off with the head unit.
2 Connecting the ground cable
The ground cable should be connected to a central ground
reference point (this is located where the negative terminal
of the battery is grounded at the metal body of the vehicle),
or to a bright bare-metal location on the vehicle chassis, i.e.
an area which has been cleaned of all paint residues.
3 Connecting the battery cable
Connect the +12 V cable to the positive terminal of the bat-
tery. Recommended cross section: min. 10mm 2
4 Fuses
The input fuses are connected in parallel and provide pro-
tection against an internal equipment fault, i.e. the system
12
must be additionally protected by a further line fuse loca-
ted in the vicinity of the battery (max. distance from bat-
tery: 30 cm). The fuse ratings are 2 x 30 amperes, and both
must be installed as the amplifier protection rating is 60
amperes (2 x 30 A).
5 - 8 Signal inputs
The H 500 ESPRIT has RCA connectors for cinch cables
leading from the pre-amplifier outputs, the line outputs of
the head unit or the outputs of a pre-amplifier/equalizer,
e.g. HXE 100. These connectors are gold-plated in order to
ensure better signal transmission. High power outputs of
radios or similar units cannot be connected directly on the
amplifier.
9 Signal input selector
. If only one stereo signal is available (i.e. 2 cinch leads
connected), the inputs can be connected from A to C and
from B to D by setting the selector switch to position 2.
When the selector is set to position 1, all the inputs are
separate.
10 - 13 Level controls for input sensitivity
These controls can be used to match the input sensitivity of
the individual channels - A to D - to the output voltage of
the connected head unit. These controls are not volume
controls and are solely intended for the purpose of sensiti-
vity trimming. The control range extends from 700 mV to
8 V.
14 Active low pass filter
This control enables the frequency range of the integrated
subwoofer amplifier to be infinitely variable from 50 to
250 Hz low-pass. (see Fig. 1)
15 Level control for the subwoofer amplifier
This control enables the level of the subwoofer to be adju-
sted to requirements independently of the other channels.
(see Fig. 2)
16 Subwoofer amplifier input selector
Setting A
The subwoofer amplifier operates with the summation sig-
nal of the 4 inputs with allowance for the input level of the
individual channels. The frequency range is adjusted with
the aid of low pass filter 14. Additionaly a mono-summati-
on signal is also available at cinch socket 21 for driving e.g.
a centerspeaker-amplifier.
Setting B
Cinch socket 21, is connected as the input of the subwoofer
amplifier. The signal can be adjusted with the aid of the inte-
grated parametric equalizer (controls 25 to 28) and with the
aid of the active crossover controls (control 14 and 15).
Setting C
Cinch socket 21 is connected with the parametric equalizer,
but without the active crossover of the subwoofer amplifier.
17 - 18 Plug-in frequency crossover modules
The H 500 ESPRIT is equipped as standard with an 85
Hz/12 dB Oct. frequency module. Other plug-in modules
compatible with all HELIX Precision Line amplifiers such
as variable high-pass/low-pass frequency modules, are
available on request. The individual functions of the fre-
quency modules are visually displayed by colored LEDs.
These have the following meanings for all modules:
yellow = high pass,
green = full range,
red = low pass.
If required the plug-in frequency crossover modules are
available with a 28 Hz/18 dB Oct. subsonic filter. For addi-
tional frequency modules see page 10/11.
19 Selector switch for channels A and B
For switching the plug-in frequency crossover modules to
high pass, full range or low pass.
20 Selector switch for channels C and D
For switching the plug-in frequency crossover modules to
high pass, full range or low pass.
21 Cinch input and output
The cinch socket is employed, as indicated in the descrip-
tion relating to Selector 16, either as a fifth input of the
subwoofer amplifier (selector positions B and C) or as an
output (selector position A).
22 Speaker connection terminals for channels A and B
23 Speaker connection terminals for channels C and D
24 Speaker connection terminal for the subwoofer
This connection consists of two positive terminals and
two ground terminals in order to allow a higher cable cross
section or to enable two subwoofers to be connected in
parallel.
The impedance minimum of all connected loudspeakers
must not be higher than 2 ohms (in bridged mode of the
channels AB/CD, 4 ohms). With the use of ported woofer
enclosures this value can be passed very easily. In this
case please ask the manufacturer of the woofer.
Important notice!
Never connect the speaker cables to the vehicle ground
(chassis). This can destroy your amplifier. Ensure that all
the speaker systems are correctly connected, i.e. plus to
plus and minus to minus. The plus pole is indicated on