ASCenDO The 18 Sub Pro Passive Sealed Shallow Subwoofer User Manual
- June 11, 2024
- ASCENDO
Table of Contents
18 SUB
PRO-PASSIVE
SEALED SHALLOW OPERATION MANUAL
IMPORTANT SAFETY INSTRUCTIONS
- Read these instructions.
- Keep these instructions.
- Heed all warnings.
- Follow all instructions.
- Clean only with a dry cloth.
- Install this apparatus in accordance with the manufacturer’s instructions.
- Do not install this apparatus near any heat sources such as radiators, heat registers, stoves or other apparatus.
- Refer all servicing to qualified 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 been dropped.
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 confident 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
specifications are subject to change without notice.
PACKAGE CONTENTS
PLACEMENT
When using subwoofers within the limited confines of a typical home theater
room, the boundary reflections, 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 frequencies 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 effect 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 significantly 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 requires that the subwoofer amplifier 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 amplifier
into clipping, which will significantly degrade audio quality and reduce the
overall output 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 subwoofer will
result in the least consistent bass performance 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 of
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 amplifier, and (–) on the
speaker to (–) on the amplifier.
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 SUB Pro Passive Sealed Shallow” subwoofer has one input for
the woofer. For driving The 18 from a single amplifier channel, the Input ( A
) is used. The (+) terminal of the amplifier should connect to (+) input
terminals of the The 18. The (–) terminal of the amplifier should be connected
to the (–) terminal. In this wiring configuration, the amplifier will be
presented with a 4 Ohm load.
If two The 18 subwoofers are used, the wires for both speakers should be
similar in length. If the bass response seems low, there may be a polarity
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 The 18, unplug the phoenix connector for easier termination. Insert the
bare end of the wires making sure to observe the correct polarity. The wire
from the amplifier’s negative (-) terminal is to be connected to the negative
(-) terminal marked with ( A ) on the terminal cup, and the amplifier’s
positive (+ ) terminal is to be connected the positive (+) terminal marked
wit
CARING FOR YOUR PRODUCT
Wipe the cabinet with a clean, dry cloth to remove dust. A damp cloth may dull
the cabinet’s finish. 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: 18-inch forward-firing,
advanced carbon rohacell composite sandwich cones.
Neo dymium Motor with 4” Ultra-high-temperature Voice-coill
Recommended amplifier type external| AIA DSP4-10K4
Recommended amplifier power| 2500 WRMS per woofer with correct RMS & Peak
limiting &
compression settings
Amplifier Features| DSP crossover and EQ
Nominal Impedance| 4 Ohms
Sensitivity| 88 dB/W/m
Max peak SPL| SPL 137dB @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| 537 / 692 / 265 (with grille 292,5)
Dimensions (W/H/D) inch| 21,14 / 27,24 / 10,43 (with grille 11,52)
Packing dimensions (W/H/D) mm| 680 / 820 / 430
Packing dimensions (W/H/D) inch| 26,77 / 32,28 / 16,92
Weight| 36 kg / 79,37 lbs
Gross weight| 40,2 kg / 88,63 lbs
Finish| Matte black paint
Technical modifications subject to change without further notice
DIMENSIONS
The 18 SUB PRO PASSIVE SEALED Shallow
DOCUMENTS/RESOURCES
ASCENDO_The 18 SUB PRO PASSIVE SEALED Shallow (pdf)
ASCENDO Immersive Audio GmbH
Adlerstrasse 2, Gebaude C, EG D-91560 Heilsbronn
Germany Tel.: +49 9872-9 537 157
www.aia-cinema.com