ASCenDO The 12 SUB Pro-Passive Sealed Shallow Subwoofer User Manual

June 11, 2024
ASCENDO

12 SUB Pro-Passive Sealed Shallow Subwoofer
User Manual
OPERATION MANUAL

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.
  8. 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

ASCenDO The 18 Sub Pro Passive Sealed Shallow Subwoofer
-PACKAGE

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

ASCenDO The 18 Sub Pro Passive Sealed Shallow Subwoofer -Single
Subwoofer

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 witASCenDO The 18 Sub Pro Passive Sealed Shallow Subwoofer -
power

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 ShallowASCenDO The 18 Sub Pro Passive Sealed
Shallow Subwoofer -DIMENSIONS

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
ASCenDO The 18 Sub Pro Passive Sealed Shallow Subwoofer - qr
code
www.aia-cinema.com

References

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