Mackie HD1531 Owner's Manual download pdf (Page 5)

Rear Panel Features

1. MAIN INPUT

This is a female XLR-type connector that accepts

a balanced line-level signal from a mixing console or

other signal source.

2. LOOP OUT

This is a male XLR-type connector that produces

exactly the same signal that is connected to the main in-

put jack. Use it to daisy-chain several HD1531's together

off the same signal source.

Contour EQ

This built-in 3-band EQ allows the HD1531 to be

tailored for any sound application. Use it to help com-

pensate for poor room acoustics, boost highs and lows

for low-volume applications, or for any other variety of

needs.

3. EQ ON

Press this in to engage the Contour EQ

circuit. The LED next to the switch will light to

indicate that the EQ is on. Use this switch to

engage or bypass the EQ, or toggle it repeatedly

while listening carefully to judge the EQ’s

effect.

4. LOW

This knob allows up to

3 dB of boost or cut at

80 Hz, with no change

in level at the unity

(U) mark. This is a

shelving EQ.

5. MID

This knob allows up to 3 dB of boost or cut at a

mid frequency set by the freq knob (6), with no

change in level at the unity (U) mark. This is a

peaking EQ.

6. FREQ

This knob allows you to adjust the center

frequency of the mid-peaking EQ, from 100 Hz

to 8 kHz, with 600 Hz at the center position.

+6dB–6dB

100

10k

20k

–3

–2

–1

100

10k

20k

–3

–2

–1

100

10k

20k

–3

–2

–1

Owner’s Manual

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Mackie HD1531 Owner's Manual Page 5

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