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C) DELAY SET-UP: if the subwoofer is placed between the main
speakers and the listening spot or at a shorter distance to the lis-
tening spot than the main speakers, the adjustment of the DELAY
will improve the sound result by entering in DELAY the difference
between two distances.
The distance d1 is the radius of the circle passing by both main
speakers tweeters, the listening spot being its centre, d2 being
the distance between the sweet spot and the subwoofer ((4)
scheme). The result r= d1- d2 is the value to enter in the DELAY
section if positive. If d2 is higher than d1, then leave DELAY on “0”
and go to the PHASE SECTION for precise setting.
D) SELECTION OF THE LOW PASS FILTER FREQUENCY
The upper limit of the subwoofer’s frequency depends upon the
type of use of the subwoofer, the main speakers’ characteristics
and the setting possibilities offered by the AV-amplifier involved
in the system: 5.1, 6.1, 7.1 set-up for single LFE channel repro-
duction with full range speakers for the other channels. The LFE
channel is monitored by the processor of the AV amplifier, we the-
refore advise to set the low-pass filter of the Santorin on 200 Hz to
avoid overlapping of both filters.
- iO2 : 125 Hz
- Riga : 80 Hz
- Baltic Evolution : 65 Hz
- Minorca / Minorca IW : 60 Hz
- Bora : 55 Hz
- Altura IW : 45 Hz
- Murano : 50 Hz
Multichannel set-up with satellites speakers requiring back-up
of a subwoofer for reproduction of the bottom-end frequen-
cies: adjust the lowpass filter of the Santorin on 200 Hz, then go
in the SET-UP menu of the AV amplifier, set the speaker sizes on
SMALL when required and set the cross-over frequency between
subwoofer and satellites speakers as close as possible to the cha-
racteristics of each satellite. Regarding Cabasse speakers, select
the frequency in the above table. If not listed here, this fre-
quency is available on the spec sheets of the products and on :
www.cabasse.com
When the SET-UP menu allows only one cross-over frequency and
satellites with different roll-off frequencies are being used, then
select the highest frequency.
Stereo use with a stereo amplifier:
In this configuration the subwoofer and a pair of Cabasse satellites
speakers are connected to a stereo amplifier. Select the low pass
frequency in the above table and enter it into the set-up menu of
the subwoofer.
An experienced installer will be able to select after measurements
on site other values than the ones we determined in our anechoic
chamber, taking into account the acoustical specifications of the
listening room.
E) VOLUME ADJUSTMENT: when the set-up includes satellite
speakers, we recommend to first adjust the volume between the
subwoofer and the main speakers in stereo mode with a selec-
tion of music rich in low frequencies. Once this set-up is achieved,
adjust the LFE level in the set-up menu of the AV amplifier. Further
LFE levels adjustments should be done in the AV amplifier and not
in the subwoofer software.
F) PHASE ADJUSTMENT: it allows if necessary to flatten the fre-
quency response around the cross-over point. If the subwoofer
is closer to the listening point than the main speakers, then leave
the PHASE on the 0° and adjust the DELAY. The right setting is
the one giving the highest perceived level of low frequencies. Try
first 0°, then 180° and 90°. Other values should be used by expe-
rienced installers with the help of measuring equipment. Readjust
the phase each time you move the subwoofer or the main spea-
kers and each time you select a new cross-over frequency.
G) PARAMETRIC FILTERS:
Thanks to our long experience in digital sound processing, we
have developed for the Santorin 30-500 unique room corrections
modules. When a graphic filter proposes volume adjustments
on fixed bandwidth, our parametric filters offer more precise
and more natural settings, being perfectly focused on the critical
zones. Sometimes the room acoustic requires the use of only one
parametric filter where a graphic filter will in any case be active all
along the bandwidth of the subwoofer and create phasing shifts.
G1) AUTOMATIC ROOM EQUALISATION (5) (6):
1) Check that all the above settings are done and recorded.
2) Select « PRESET 2 » for the first adjustment in order to
keep « PRESET 1 » as a reference.
3) Unpack the microphone and the mic-stand delivered with
the subwoofer.
4) Place the microphone at the height of the listening point
(P1 on drawing (6)) and connect it to the microphone-
preamplifier input “MIC IN”.
5) In the subwoofer set-up:
a. In «AUTO ACQUISITION », press enter to confirm the
measurement process.
b. « Start Acq. 1 ? »:
b1. Check that the microphone is right at the height of
the listening spot (P1).
b2. Press « ENTER » to launch the measurements acqui-
sition 1.
If « no signal input » comes out on the LCD screen,
check all the connections and above setups and
start “AUTO ACQUISITION” again.
c. « Start Acq. 2 ? »:
c1. Place the microphone around 1 m aside the (P1) po-
sition (left or right, as for as possible from the walls),
somehow in front of (P1) and around 60 cm above
initial position (P2).
c2. Press « ENTER » to launch the measurements acqui-
sition 2.
