User Manual

KH 120 | 13
X
Use the ACOUSTICAL CONTROLS switches 7 to adjust the frequency response.
Recommended frequency responses:
• Studio applications: flat
• Film applications: X-curve shape (see ANSI/SMPTE 202M)
• Home applications: subjective evaluation
ACOUSTICAL CONTROLS
switches 7
Function Possible settings
Bass Compensates for acoustical loading in
the low frequency range due to nearby
large solid boundaries (e.g. walls).
0, -2.5, -5, -7.5 dB
Low-Mid Compensates for acoustical loading in
the low-mid frequency range due to
nearby large solid objects (e.g. mixing
consoles or desks).
0, -1.5, -3, -4.5 dB
Treble Compensates for insucient or
excessive high-frequency damping in
the room.
+1, 0, -1, -2 dB
The following settings can be used as a starting point for further adjustment:
Loudspeaker position Acoustical controls
Bass Low-Mid Treble
In a corner -7.5 dB -1.5 dB –
Next to an acoustically solid wall (e.g. brick, concrete) -5 dB – –
Next to an acoustically soft wall (e.g. gypsum) -2.5 dB – –
Free standing in an untreated room -2.5 dB – -1 dB
Free standing in a well-treated room – – –
In a small room with strong side wall reflections -5 dB 0 dB –
Near a small desktop or small reflecting surface* – -1.5 dB –
Near a large desktop or large reflecting surface* – -3 dB –
*
Use these settings in addition to one of the top five settings
Adjusting the acoustic level
X
On your KH 120 loudspeakers, set the OUTPUT LEVEL switch 8 to 94 dB SPL and the INPUT
GAIN control 9 to -15 dB.
X
Play a broadband pink noise test signal that is set to -18 dBFS (Europe) or -20 dBFS (USA)
on the mixing console’s output level meters.
X
Measure the sound pressure level at the listening position using a sound level meter with
the following settings:
• “C”-weighted
• slow integration time
X
Set the OUTPUT LEVEL switch 8 and INPUT GAIN control 9 of your loudspeakers so that
the desired acoustic level is obtained.
EN