Ascendo 18-2 SUB PRO PASSIVE SEALED Shallow User manual

ELEVATE YOUR SOUND
OPERATION MANUAL
18-2 SUB
PRO-PASSIVE
SEALED SHALLOW

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Contents
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3
4
5
6
6
7
1 IMPORTANT SAFETY INSTRUCTIONS
PA2 CKA CGE ONTENTS
PL3 ACEMENT
C4 ONNECTIONS
5 CARING YFOR OUR PRODUCT
6 SPECIFICATIONS
7 DIMENSIONS
8 DOCUMENTS / RESOURCES 7
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Clean only with a dry cloth.
6. Install this apparatus in accordance with the manufacturer’s instructions.
7. Do not install this apparatus near any heat sources such as radiators, heat registers, stoves or other apparatus.
DISPOSAL
Correct disposal of this product (Waste Electrical & Electronic Equipment) This symbol means the product must not be
discarded as household waste and should be delivered to an appropriate collection facility for recycling. Proper disposal
and recycling help protect natural resources, human health, and the environment. For more information on disposal and
recycling of this product, contact your local municipality, disposal service, or the shop where you bought this product.
RoHS
This product is RoHS compliant. This product is in compliance with Directive 2011/65/EU, and its amendments, on the
restriction of the use of certain hazardous substances in electrical and electronic equipment.
REACH
REACH (Regulation No 1907/2006) addresses the production and use of chemical substances and their potential impacts
on human health and the environment. Article 33(1) of REACH Regulation requires suppliers to inform the recipients if
an article contains more than 0.1 % (per weight per article) of any substance(s) on the Substances of
Very High Concern (SVHC) Candidate List (‘REACH candidate list’). At the time of release of this product, no substances
of REACH candidate list are contained in a concentration of more than 0.1% per weight in this product.
THANK YOU FOR CHOOSING ASCENDO IMMERSIVE AUDIO.
For more than 23 Years, ASCENDO has been involved in music reproduction. We are condent that the PRO product you
have chosen will provide every note of enjoyment that you expect.
Please take a moment to register your product on our website at www.aia-cinema.com. This enables us to keep you
posted on our latest advancements and helps us to better understand our customers and build products that meet their
needs and expectations. All features and specications are subject to change without notice.
PACKAGE CONTENTS
1 x Subwoofer 1 x Grille 1 x Quick Start Guide
EL EV AT E YOUR SOUND
OPERATION MANUAL
18-2 SUB
PRO-PASSIVE
SEALED SHALLOW
been dropped.
18-2 SUB
PRO-PASSIVE
SEALED SHALLOW
8. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been dam
aged in any way, or the apparatus has been exposed to rain or moisture, does not operate normally or has

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Double Subwoofer
Four Subwoofers
PLACEMENT CONNECTIONS
Speakers and electronics have corresponding (+) and (–) terminals. Most manufacturers of speakers and electronics, use
red to denote the (+) terminal and black for the (–) terminal. It is important to connect both terminals identically: (+) on the
speaker to (+) on the amplier, and (–) on the speaker to (–) on the amplier.
This connection ensures, that all speakers work in unison and make a forward movement if a positive signal is applied and
move backward when a negative signal is applied.
Wiring “out of phase” results in thin sound, weak bass, and a poor stereo image. With the advent of multichannel surround
sound systems, connecting all the speakers in your system with the correct polarity remains equally important to preserve
the proper ambience and directionality of the program material.
The AIA “The 18-2 SUB Pro Passive Sealed Shallow” subwoofer has dual inputs, with one input for each woofer. For driving
the 18-2 from a single amplier channel, the (+) terminal of the amplier should connect to both (+) input terminals of the
The 18-2. The (–) terminal of the amplier should be connected to both (–) terminals. (Figure 2)In this wiring conguration,
the amplier will be presented with a 2 Ohm load. Alternatively, (Figure 1) two equal amplier channels can be used, one
for each woofer.
Each amplier (+) terminal should connect to one of the woofer input (+) terminals. Each amplier (–) terminal should con-
nect to the (–) terminal of the terminal set that is connected to the same amplier channel’s (+) terminal.
If the bass response seems low, there may be a polarity or phase problem between the two drivers, with the sound waves
from the two woofers canceling each other out. Double-check your wiring and DSP settings to make sure both woofers in
a single 18-2 have their (+) terminal connected to the appropriate amplier (+) terminal and their (–) terminal connected
to the appropriate amplier (–) terminal.
If two 18-2 subwoofers are used, the wires for both speakers should be similar in length. If the bass response seems low,
there may be a phase problem between the subwoofers, with the sound waves from the two subwoofers canceling each
other out. If the bass response seems low, check the correct polarity of all wiring including Speaker wires, XLR signal cables,
DSP settings etc.
To use the speaker terminals on the terminal cup located behind the 18-2 unplug the phoenix connector for easier termi-
nation. Insert the bare end of the wires making sure to observe the correct polarity. The wire from the amplier’s negative
(-) terminal is to be connected to the negative (-) terminal on the terminal cup, and the amplier’s positive (+) terminal is
to be connected the positive (+) terminal on the terminal cup.
The 18-2 subwoofer is specically designed for use in conjunction with the AIA DSP ampliers. It is optimized to oer the
best dynamics and frequency response which is specially designed to use the proprietary 18-2 tuning le. When using a
dierent amplier with the 18-2, contact your certied AIA installer or calibrator for correct adjustment and loading of
the tuning le. Connect your main receiver or processor’s LFE subwoofer output to the line-level input on your subwoof-
er amplier. When using two or more subwoofers, use the correct number of amplier channels (these can be mono or
multi-channel ampliers) each connected to the appropriate output on your processor or receiver. Then connect the posi-
tive and negative terminals for each amplier channel to a single 18-2 subwoofer system.
USING ONE The 18-2 SUB Pro Passive Sealed Shallow SUBWOOFER WITH TWO AMPLIFIER CHANNELS
Single Subwoofer
Rooms with a single row of seating Rooms with multiple seating rows
Video Screen Video Screen
Video Screen
When using subwoofers within the limited con-
nes of a typical home theater room, the bound-
ary reections, standing waves, and resonant
absorbers within the room will create peaks and
dips in the bass response that can vary greatly
depending on where the listeners are seated in
the room. A listener located in one place may
hear an overabundance of several bass frequen-
cies created by a response peak at the location,
while another listener only a few feet away may
hear far less bass at those frequencies but have
other peaking or dipping frequencies at that
location.
The locations of subwoofers within the room
(along with the room’s dimensions) also have
a profound eect on the creation of these bass
response peaks and dips. Careful subwoofer
placement alone cannot compensate for all bass
response peaks and dips throughout a room,
but careful subwoofer placement can eliminate
or signicantly reduce the largest response dips.
It is important to reduce response peaks and
dips throughout the room as much as possible
via proper subwoofer placement because equal-
ization cannot be used to compensate for large
response dips, only peaks. For example, using
equalization to restore a 13dB response dip re-
quires that the subwoofer amplier deliver 20
times the power at that frequency if it solves the
problem at all, which it does not in most cases.
This can quickly overdrive the subwoofer am-
plier into clipping, which will signicantly de-
grade audio quality and reduce the overall out-
put capability. In almost any room, placing the
subwoofers in corners will produce the fewest
large bass response dips and will also produce
the largest bass response peaks. We strongly
recommend that you install multiple subwoofers
regardless of the room size. A single subwoof-
er will result in the least consistent bass per-
formance throughout the room. Using multiple
subwoofers can reduce some room modes at
the various listening locations, resulting in much
more consistent low frequency throughout the
listening area. It is often impossible to place a
single subwoofer in a way that large response
dips, which cannot be corrected via equalization,
are not present. The use of two or more proper-
ly placed subwoofers almost always reduces or
eliminates such response dips. Common place-
ment formulas such as placing the subwoofers at
¼ points rarely work in practice. The best solu-
tion is to make high-resolution measurements
from the primary listening area while experi-
menting with speaker placement. Placing a sub-
woofer at the listening position and measuring it
from the potential installation positions around
the room – using acoustic reciprocity – can help
speed nding the best position(s). Measurement
at the best positions in this manner will produce
the measurements with the fewest and smallest
peaks and dips in the response.
Video Screen
ELEVAT E YOUR SOUND
THE 18-2 SUB PRO Passive Sealed Shallow
Wiring Diagram
with two amplier channels
ELEVAT E YOUR SOUND
THE 18-2 SUB PRO Passive Sealed Shallow
Wiring Diagram
with a single amplier channel

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CARING FOR YOUR PRODUCT
Wipe the cabinet with a clean, dry cloth to remove dust. A damp cloth may dull the cabinet’s nish. Do not use volatile
liquids such as benzene, paint thinner or alcohol on the cabinet.
Do not spray insecticide near the cabinet.
To remove dust from the grille fabric, use a vacuum cleaner, soft brush and set to low suction.
Do not wash the grille in water, as water may fade the grille’s color or make it uneven.
If the surface of the woofer cone becomes dusty you can carefully sweep it clean with a soft, dry calligraphy brush or
paint brush or low air pressure. Do not use a damp cloth.
SPECIFICATIONS
Enclosure type Sealed
Low frequency driver size and material Low frequency driver size and material: Dual 18-inch forward-
       ring,advancedcarbonrohacellcompositesandwichcones.
NeodymiumMotorwith4”Ultra-high-temperatureVoice-coil
Recommendedampliertypeexternal AIADSP4-10K4
Recommendedamplierpower 2500WRMSperwoofer(5000WRMSTotal)withcorrect
RMS&Peakliming&compressionsengs.
AmplierFeatures DSPcrossoverandEQ
NominalImpedance 4Ohmsperwoofer
Sensivity 88dB/W/m,94dB/W/msystem
MaxpeakSPL SPL143dB@100Hz
FrequencyResponse,-3dB 33Hz–400Hz
FrequencyResponse,-15dB 22Hz–400Hz
SpeakerInput One4-conductorPhoenix12AWG(3,3mm²)pushonbinding
post
Dimensions(W/H/D)mm 600/1215/265(withgrille292,5)Vertical
1200/615/265(withgrille292,5)Horizontal
Dimensions(W/H/D)inch 23,62/47,83/10,43(withgrille11,52)Vertical
47,24/24,21/10,43(withgrille11,52)Horizontal
Packingdimensions(W/H/D)mm 740/1340/430
Packingdimensions(W/H/D)inch 29,13/52,75/16,92
Weight 67kg/147,71lbs
Grossweight 78,2kg/172,40lbs
Finish Maeblackpaint
Technical modications subject to change without further notice
ELEV AT E YOUR SOUND
OPERATION MANUAL
18-2 SUB
PRO-PASSIVE
SEALED SHALLOW
DIMENSIONS
The 18-2 SUB PRO PASSIVE SEALED Shallow
DOCUMENTS / RESOURCES
ASCENDO_The 18-2 SUB PRO PASSIVE SEALED Shallow (pdf)