Quest Engineering HPI8i, User Manual

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HPI 8i
User Manual
User Manual HPI Series
HPI 8i
HPI 8i
User Manual
User Manual
HPI Series
HPI8i
4 5
Connections
Two Neutric Speakon model NL-4 connectors
are mounted in a recessed panel on the
rear surface of the box. This allows the
speaker box to be set flat against a wall
without physical interference to the speaker
connector.
• The connector input is wired pin 1+
and pin 1-
• Pin 2 is not connected
Take care when inserting the Speakon
connector twisting the connector until it
locks into place. Reverse the procedure to
disconnect.
Getting The Best From Your HPI 8i
Speaker cables
Speaker cable needs to be as heavy gauge
as conveniently possible for low-loss results.
Light gauge cable (below 1.5mm) will create
extra resistance and waste amplifier power.
This particularly applies to long speaker
runs. The amplifier’s damping factor statistic
(“punch” for the non technical) is greatly
diminished, so keep your speaker cables
short and as heavy gauge as practical.
Speaker Placement as a Single Box
or in Arrays
The HPI 8i is intended for use as a single
speaker, distributed system or as part of a
multiple speaker setup with or without sub
bass reinforcement. It can also be installed
in small arrays of up to three boxes per
array for very wide coverage applications.
When a group of point source speaker boxes
are placed together, it is possible to have
“interference effect” between the boxes
causing uneven frequency response. This
can be particularly noticeable in the mid-high
frequency area. If you intend to set up the
HPI 8i as part of a multiple box array, see the
section ‘Flying the HPI 8i’.
Suitable Amplification
The HPI-8i is an 8 ohm enclosure and can be
connected in multiple parallel connections
to an amplifier channel that can operate
at speaker impedances of 4 ohms. A third
speaker box can be connected in parallel if
the amplifier can operate into loads of less
than 4 ohms.
The HPI 8i is a mid power level high efficiency
system, so ultra high power is not necessary
to obtain high sound pressure levels. The
recommended power range per amplifier
channel is 350-450 watts RMS into an 8 ohm
load or up to 900 watts RMS into a 4 ohm
load. The HPI-8i is ideal for use with the
Quest QA1004-2004 or QM1000P amplifiers.
Setting the QA amplifier’s high pass filter
at 35Hz is recommended for full range
applications. If you are intending to add
sub bass speakers or use for mainly vocal
reproduction, the high pass filter can be
set to 80Hz.
* The 80 Hz Hi pass is also
recommended if the HPi 8i speakers are
to be driven hard with full frequency
dance music program over long durations .
When positioning the speaker system on a
stage, make sure the HF horn at the top of
the speaker box is above the heads of the
audience. At full power the output of the HPI
8i is very high and hearing damage can result
from short to medium term exposure.
For best results when the HPI 8i is used as a
front of house speaker, consider angling the
box forward slightly to direct the HF horn to
cover the audience area. The HF horn should
be aimed away from the ceiling and focused
on the intended area of coverage. This will
minimize HF reflections, lower the reverberant
field in the room and give better intelligibility.
Ideal HPI 8i Flown Configuration Recommended HPI 8i Amplifier Configuration
OUTPUT ASSIGNMENT
PIN1+ :
PIN1-:
S IG N A L
G ROUND
LINKA
LINKB
INPUTA
INPU T B
PushToReset
~
220 240V 10A 50/60Hz
OUTPUT A
OUTPUT B
BRIDGE
PIN1:
PIN2:
PIN3:
SIGNAL G N D
SIG N AL +
SIGNA L -
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
OF F 80H z 110Hz
LOW PASS-A
26dB 32dB 1.4V
GAIN
STEREO PARALLEL BRIDGE
MODE
OF F 35Hz 80Hz
HIGHPASS-B
OF F 80H z 110Hz
LOW PASS-B
ON OF F
LIMITE R
LIFT GROUND
GROUND
DESIGNED BY QUEST ENGINEERING,AUSTRALIA
MODEL :
OF F 35H z 80H z
HIGHPASS-A
OFF 35Hz 80H z
HIGHPASS-A
10
1
1 2
5
10
1
5
Reducing low
frequency output will
make more amplifier
power available
for clean vocal
reproduction for full
range sound, set the
high pass filter to 35Hz