Delay – Proel PC260 User Manual

Page 19

For each output channel two crossover points can be set, which are named Xo1

and Xo2 . Please note that in the FLAT default preset both are set as Thru (the

signal passes thru without filtering process) .

The parameters are:
LP/HP

The crossover filter generally consists of a low pass filter in one channel and a

high pass filter in the adjacent channel .

H-pass: a high pass filter passes frequencies above the crossover point and

attenuates those below .

L-pass: a how pass filter passes frequencies below the crossover point and

attenuates those above .

As standard Xo1 is set as H-pass (HIGH-PASS) and Xo2 is set as L-pass (LOW-

PASS), but they can be set also differently .

See the figure below (note: all the following figures are taken from the PRONET

software):

TYPE

The PC260 offers a wide choice of HiPass and LoPass filters with different slopes

and responses . The Type parameter defines the characteristics of the crossover

filter:

• Butterworth: 6dB, 12dB, 18dB, 24dB, 48dB

• Bessel: 12dB, 18dB, 24dB 48dB

• Linkwitz-Riley: 12dB, 24 dB, 48dB

Each filter can be bypassed setting it as "thru".

The figures below show the various slopes with the FREQ parameter set at 1 kHz:

FREQ

Frequency offers a selectable frequency range from 20 Hz to 20 KHz .

DELAY

PC260 offers input and output delay .

Master A and B input delay is useful for compensating

different arrival times of sound originating from loudspeakers

that are closer or further away from the listener than others .

Channel 1 to 6 output delay is useful for compensating physical offsets of the

acoustic centers of transducers within a loudspeaker cabinet . For example,

due to cabinet construction, the acoustic center of a high frequency transducer

may be placed behind or in front of the acoustic center of the low frequency

transducer . The Delay parameter can align the audio signal between the

multiple transducers within the loudspeaker . The output delay can be useful

also to align the subwoofer, usually placed at ground level, with the satellite

speakers suspended . Available delay parameters are DELAY and UNITS:

The DELAY parameter allows the user to set the Delay time values (0 to

+300 .00ms or 0 to 200m/675ft) .

This figure shows the frequency spectrum of an output with Xo1 set as H-pass, Butt 24, 100Hz and Xo2 set as

L-pass, Butt 24, 1KHz all signal highlighted is cut out .

CUT OUT

PASS THRU

BUTTERWORTH

BESSEL

LINKWITz-RILEY