HD1221, HD1521, HD1531, HDA
Question: Can I connect this to the speaker output of an amplifier?
Answer: When setting up your HD speaker, it is very important that you
DO NOT connect it to the output of an amplifier. The inputs of the HD
series are made for non-powered outputs such as the main or aux
outputs from a mixer. The outputs of an amp will easily damage and
potentially cause a fire in just about any powered speaker such as the
HD series.
Question: What is the proper method for flying or mounting the
Answer: Our engineers have designed the speaker with integrated fly
points to simplify its integration into a permanent installation. Due to
the inherent dangers involved in hanging or mounting these or any
speakers, we strongly recommend that a qualified professional be
employed in any such installation. The HD Series accepts M-10
eyebolts, which have a 1.5 mm thread diameter and 20 mm length.
Question: What is the EQ on the speaker used for?
Answer: The integrated 3-band EQ on the HD series speakers is great
for minor adjustments to accommodate for the particular environment
that the speakers are being used in. If your system is producing less low
end in a particular room than normal, you can make up for it by turning
up the Low EQ a bit. The EQ can also be used when there are limited EQ
options at the audio source.
Question: The speaker hums when I connect something to its input…
Answer: The presence of a 60Hz hum in the speaker only when a
connection is made to another piece of equipment suggests the
presence of a ground loop. Such a loop is caused by electrical
interaction of the signal grounds on two pieces of equipment, and is
not necessarily an indication of broken gear. If a balanced connection
to the HD speaker is being used, the simplest way to correct this
problem is to lift the signal ground on the end of the connecting cable
closest to the signal source. NOTE: This is not to be confused with
disconnecting the safety ground on the power plug - this should be
avoided at all costs, as it can present a safety hazard. If an unbalanced
connection is being made to the HD, a line coupler such as the Ebtech
Hum Eliminator can be used to eliminate the ground loop.
Question: Will I get output from both the A and B output jacks if I only
have input into the A jack?
Answer: In order to get signal out of both the A and B jacks, you must
also have signal going into the A and B Inputs.
Question: Is it normal for the speaker to "pop" when it is switched on
or off?
Answer: It is normal for the HD speaker to emit a slight "pop" when it is
powered up or down. The pop is caused by electricity left inside the
amplifier circuitry discharging to the speaker.
Question: If the volume control is at "U" does that mean I am only
getting half power?
Answer: The volume control on the HD series speakers is actually an
input sensitivity control. When set to the "U" or Unity, it is not adding
or subtracting any level from the source audio signal. Most sources
such as a mixer will have an output that will sound best with this
control at unity. When turning it higher than this, you are not gaining
any more power in the speaker; rather you are lowering the headroom
of the amplifier thus making it actually work harder than it needs to.
Question: What happens if the Limit light is turning on?
Answer: When the Limit light is flashing or on, this means that the
amplifier is being pushed a bit too hard. If you see this happening, turn
down the level control immediately until the Limit stops lighting.
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