MK2

REAR PANEL DESCRIPTION

HR624

This is where you connect your signal to the monitor, and make adjustments to the frequency response of the speakers to match the monitor’s location and your room’s environment.

For THX applications, the rear panel

switches and controls should be set

to the THX positions as indicated in this section.

1. SIGNAL INPUTS

The location of the signal input jacks makes the connectors exit down and not straight out the back of the enclosure. This flush-mount design allows you to place the monitor right up against the wall if desired.

•The XLR female, TRS female (balanced), and RCA female (unbalanced) input connectors are provided for user convenience.

•Don’t connect more than one source to the jacks.

•Unbalanced TS (tip-sleeve) lines can be accommodated via the TRS jack. Make sure the cable terminates with a TS plug (like a guitar plug), or if it’s a TRS plug (such as a headphone plug), make sure the ring is tied to the sleeve and that the plug is fully inserted into the jack.

•The XLR and TRS input connectors accept balanced or unbalanced signals. The connectors are wired as follows (per the AES/IEC standard):

XLR TRS RCA

Hot (+)

Pin 2

Tip

Tip

Cold (–)

Pin 3

Ring

—

Shield (Ground)

Pin 1

Shield

Shield

2. INPUT SENSITIVITY

–10dB

OFF NORMAL

INPUT

SENSITIVITY

THX = NORMAL

The HR624 MK2 expects a line-level signal at its input connectors.

•The reference sensitivity is –7.5 dBu=100 dB SPL at one meter (39 inches) with the INPUT SENSITIVITY control set to its NORMAL position (in other words, wide open).

•The HR624 MK2 is designed to operate with a +4 dBu signal when the INPUT SENSITIVITY control is in the NORMAL position.

•Refer to the QUICK START section on page 4 for the level-setting procedure.

3. ACOUSTIC SPACE

QUARTER

WHOLE (NORMAL)

A

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

HALF

ACOUSTIC

SPACE

THX = WHOLE (NORMAL)

8

•The HR624 MK2s can be used with a home receiver even if the receiver lacks a preamp output by using a speaker-level to line-level signal attenuator. (See page 13 for more information.)

HR624 MK2

This is a three-way switch that adjusts­ the low-frequency response of the monitors to compensate for their placement in the room. See page 5 for an overview of the rear panel.

•If you place the HR624 MK2 monitors against a wall (half space [3B]), set the ACOUSTIC SPACE switch to the “B” position. This activates a shelving filter to reduce the low-frequency output by 2 dB to compensate for the half-space placement.

•If you place the monitors into the corners of your room (quarter space [3A]), the low-frequency output approximately doubles from what it is in half space. Set the ACOUSTIC SPACE switch to the “A” position to reduce the low-frequency output by 4 dB to compensate for the quarter-space placement.

•If you use the HR624 MK2s free-standing, away from walls and corners (whole space [3C]), set the ACOUSTIC SPACE switch to the “C” position (NORMAL).