BassBoss AT312 Attuned Top User manual

AT312 Powered Top SPeaker
Owner’s Manual

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©®2018 True Lee Loudspeakers, LLC – [email protected] – 512-368-3268 855-8-BASS-70 Toll Free
AT312 Powered Top SPeaker AT312 Powered Top Speaker
Owner’s Manual
TABLE OF CONTENTS
Overview...................................................................................... 3
Technical Specifications........................................................... 4
Photos.......................................................................................... 5
Response Graphs & Dimension Drawings............................ 6
Setup Instructions..................................................................... 7
Troubleshooting........................................................................ 8
Safety Information.................................................................... 8
Warranty...................................................................................... 9
FCC Compliance Notice............................................................. 10
Need more assistance? Support is available via phone or email.
Email: [email protected]
Phone: [phone] toll free or 512-368-3268
Web Site: www.bassboss.com

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The AT312 Attuned Top is a co-axial point-source cabinet for
medium to short distance coverage where a small footprint and
very high fidelity are required. It’s compact, simple to use, easy
to set up, attractive and capable of very high output with
superbly uncolored sound and natural musical character.
When combined with subwoofers like the SSP218 Profundo Subwoofer
or ZV28 Profundo Sub, the result is an extremely high-resolution 4-way
active loudspeaker system with virtually unparalleled resolution and
dynamic power for its size. Its driver compliment incorporates dual 12”
woofers in a vented enclosure for low frequencies and a 12” midrange driver
in a sealed enclosure with a co-axially mounted 1.4” exit compression driver.
Coverage is 80 degrees conical. One-man set up of a substantial system is
made easy because the AT312 cabinets weigh only 88 lbs each.
Dual 12” low frequency drivers were chosen to minimize cabinet frontal
area while delivering the best possible speed and impact in their operating
range. Thanks to the narrow frontal area, the low frequency drivers couple
coherently when multiple cabinets are arrayed, providing powerful mid-bass
impact from a small, lightweight box. The 12” coaxial drivers also serve to
minimize frontal area while maximizing output. The loudspeaker behaves
as a point-source, which deliver more consistent off-axis performance than
conventional loudspeakers with separate mid and high frequency drivers.
This feature enhances resolution and the consistency also enhances the
loudspeaker’s versatility, allowing it to be mounted horizontally or vertically
with no compromise in coverage or performance. The 48” tall box elevates
the mid and high frequency radiators to a minimum of 7’6” on center when
stacked on the corresponding subwoofer systems.
Transportation and set-up of the SSP218/AT312 combination is made
easy because the subwoofers serve as a carrier for the tops. In most venues
it’s possible to roll the system into place, lock the casters, tilt up the tops,
plug in the power and signal and have an extremely substantial system ready
to play in a few short minutes by just one person.
When an AT312 is used with a BASSBOSS powered subwoofer the result
is a very effective, practical, high fidelity 4-way active loudspeaker system.
The simplicity and ease of these components together, coupled with fidelity
and reliabilty that are industry leading, will delight anyone who is regularly
moving gear.
Any speaker that has the tweeter horizontally or vertically offset from
the mid-frequency driver produces very different response as one moves
through its coverage area from the tweeter side to the woofer side. This
is due to the different distances the sound has to travel to reach the ears.
Due to the co-axial construction of the AT312 the path length difference
between lows and highs is the same in any direction, allowing extremely
consistent off-axis response regardless of which direction you move away
from directly on center.
• Outstanding Sound Quality
• High-Output 3-Way Active Loudspeaker
• Lightweight and Low-Profile
• Symmetrical Coverage, Any Orientation
• With Subs Offers 1 Person Set-Up Large System
AT312 Attuned Powered Top

Page 4
Loudspeaker Description: Point-source mid-high cabinet with 80 degree conical coverage for horizontal or vertical applications
Frequency Response (±3 dB): 80 Hz – 18 kHz
Sensitivity: LF: 101dB; MF: 99dB; HF:105dB
Maximum Sustained Output: 130 dB
Nominal Dispersion (°H x °V): 80 x 80
ACOUSTICAL
Input Power Rating: 3000 Watt 4 Channel Powersoft Class D Amplifier
Input Power Rating, LF, MF, HF: 1400W, 800W, 160W Enclosure
Output Power Rating, Channel 1: 750W @ 4Ω
Output Power Rating, Channel 2: 750W @ 4 Ω
Output Power Rating, Channel 3: 750W @ 4 Ω
Output Power Rating, Channel 3: 500W @ 8 Ω
Processing: Integrated comprehensive DSP with 4 presets; including high-pass, low-pass,
parametric EQ, phase alignment and limiting
Electrical Input Connector: Neutrik Powercon
Voltage Operating Range: 90-250V. Auto-sensing, auto switching universal supply
Current Draw, Nominal: 3.6A @ 120 volts, 2A @ 220V (typical, 1/8 max power)
Signal Input Connector: XLR-F
Signal Output Connector: XLR-M full-range pass-through
ELECTRICAL
Type: 3-way mid-high. Direct radiating, vented enclosure LF section, acoustic suspension MF section
with co-axially mounted, horn-loaded HF section
Low Frequency Transducer: 2 x 12 “ did (300 mm) neodymium motor woofer with 4” (100 mm) voice coil, waterproof cone
Mid Frequency Transducer: 12” dia. (300 mm) neodymium motor 3” voice coil midrange driver with co-axial HF exit
High Frequency Transducer: 1.4” exit 3’ (76 mm) voice coil compression driver mounted to 80 degree conical wave guide
Cabinet Construction: 18mm Baltic Birch plywood, dado joinery, integrated handles, 20 degree side angle trapezoid
Suspension System: 4 x 3/8”-16tpi threaded flypoints
Dimensions (HxWxD): 48” x 15” (front) x 14” (121.92 cm x 38.1 cm [front] x 35.56 cm)
Net Weight: 95 lbs. (43 kg)
Shipping Weight: 110 lbs. (50 kg)
Exterior finish: Rugged, weatherproof, black textured, bonded high-pressure polyurethane coating
Grill: Perforated, powder-coated steel
Pole Sockets: 1 (35 mm)
Handles: 6 Integrated Handles
Physical
Side Pull Anchors: For use when flying cabinets horizontally
Shoulder Eye Bolts: For use when flying cabinets vertically
Cover: Heavy-duty padded nylon transport cover
Online Information: bassboss.com/at312
Optional
Our proactive philosophy causes specifications to be subject to change whenever improvements are made.

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FREQUENCY RESPONSE GRAPH, DIMENSION DRAWINGS
Single Cabinet Response
Response with Subwoofer

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SET UP INSTRUCTIONS
1. Place loudspeaker in the desired location. Ensure that it is secure and stable.
2. Rotate the input attenuator knob counterclockwise to the lowest setting.
3. Connect signal via the XLR input jack.
4. Connect the amplifier module’s power supply cord using the blue PowerCON connectors. To insert, align the indexing tabs on the
PowerCON connector, insert it into the socket and rotate clockwise until the latch catches.
5. Connect the electrical plug to a power source. Check that the “Ready” LED is illuminated.
6. Select the desired preset via the PRESET SELECT button.
7. Rotate the input attenuator clockwise to achieve the desired sound level.
CONTROLS:
Preset Select:
The AT312 compact full-range loudspeaker’s DSP is equipped with 4 presets. All four presets contain limiter settings to ensure safe operation. The presets are
accessed via the preset select button on the amplifier interface, between the XLR input and output connectors. When the button is pressed, each preset loads in
sequence, from 1 to 4, and then cycling back to 1. A green LED indicates the active preset.
Gain:
The level knob provides a range of control from OFF to +12dB within each preset.
Indicators:
Ready - Green LED - Indicates that the amplifier has power and is operational.
Signal - Green LED - Indicates the presence of signal reaching the amplifier inputs.
Temp - Amber LED - Indicates the amplifier is actively reducing level to prevent overheating.
Limit - Red LED - Flashing - Indicates that the loudspeaker is being overdriven.
Limit - Red LED - Solid or rapid blinking - Indicates amplifier is in protect mode.
Preset Functions:
Preset 1: Stand-alone Full-Range Operation. 45Hz high-pass filter. Recommended for use when no sub is available. Peak output is restricted to prevent low
frequencies damaging the loudspeaker.
Preset 2: Intermediate Stand-Alone setting, 60Hz high-pass. Recommended for use with a single sub or when subwoofers are separated from AT312s, such as when
subs are center-placed.
Preset 3: Intermediate High-Output setting. 75Hz high-pass. Recommended for use when single subwoofers are co-located with the AT312s, such as if the AT312s
are on a speaker pole above a subwoofer or on a tripod adjacent to a subwoofer.
Preset 4: Maximum SPL Setting, 90Hz high-pass. Recommended for use when outdoors, in larger venues and/or when multiple or larger subwoofers are co-located
with the AT312s.
Presets 2, 3 and 4 allow the AT312s to be combined with various subwoofer configurations and allow the sound to be tailored to different environments. It is
recommended to listen to the appropriate presets in each new setting and choose the one that works best in that environment.
System Setup Addendum:
When connecting multiple BASSBOSS loudspeakers in a system, signal can be passed through from one powered loudspeaker to another using balanced, shielded
XLR cables. No processing is applied to the signal as it passes through from the input to the output connectors in each loudspeaker. Signal can be routed in
any sequence because each loudspeaker receives a full-range signal and applies the necessary processing in order to operate as part of the overall system. It is
recommended to run signal to the nearest box first and patch to the next nearest box in sequence.

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TROUBLESHOOTING
If after following the above instructions for setup you have no output from the loudspeakers, please check the following:
Verify that the green power (PWR) LED is on. If not, check the following:
1. Is the power cord plugged into a live outlet?
2. Is the Neutrik PowerCON connector rotated into the locked position?
If the power LED is on, check the following:
Is the green “signal present” LED (SIG) illuminating? If not:
1. Is the signal cable connected to the input?
2. Is the signal cable connected to an operating output at the other end?
3. Is the signal flowing to the input? Check the integrity of the cable.
SAFETY INFORMATION
Important information regarding safety and the use of your loudspeakers:
Never stand in the immediate vicinity of loudspeakers driven at a high level. Professional loudspeaker systems are capable of causing a sound pressure level
detrimental to human health. Seemingly non-critical sound levels (from approx. 95 dB SPL) can cause hearing damage if people are exposed to it over a long period.
To prevent potentially dangerous exposure to high levels of acoustic pressure, anyone who is exposed to these levels should use adequate protection devices.
When a transducer capable of producing high sound levels is being used, it is therefore necessary to wear ear plugs or protective earphones.
See the manual technical specifications to know the maximum sound pressure level.
In order to prevent accidents when setting up the loudspeakers or loudspeaker stands, make sure they are standing on a firm surface.
Ensure that all additional hardware, fixings and fasteners used for installation or mobile deployment are of an appropriate size and load
safety factor.
Pay attention to the manufacturers’ instructions and to the relevant safety guidelines.
Regularly check the loudspeaker housings and accessories for visible signs of wear and tear, and replace them when necessary.
Regularly check all load bearing bolts in the mounting devices.
Caution: Loudspeakers produce a static magnetic field even if they are not connected or are not in use. Therefore make sure when erecting and transporting
loudspeakers that they are nowhere near equipment and objects which may be impaired or damaged by an external magnetic field. A distance of 3 feet (1m) should
be maintained between loudspeakers and sensitive equipment such as CRT monitors or magnetic storage media.
Never attempt to carry out any operations, modifications or repairs that are not expressly described in this manual.
Contact your dealer or BASSBOSS support if the product is not functioning properly.
BASSBOSS strongly recommends this product be installed by a qualified, professional installer who can ensure correct installation and certify that it is installed
in compliance with the regulations in force.
The entire audio system must comply with the current local standards and regulations regarding electrical systems.
IMPORTANT NOTES
To prevent the occurrence of noise on signal cables, use shielded cables only. Avoid routing signal cables close to equipment that produces high-intensity
electromagnetic fields such as transformers, power cables and loudspeaker wires. Do not coil excess power cable. Do not coil or wrap power cables and signal
cables together.

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Thanks for your BASSBOSS purchase!
WARRANTY INFORMATION
Beyond ensuring your satisfaction, our extensive “Sound Defense” transferable warranty covers all BASSBOSS products.
STANDARD CABINET WARRANTY
BASSBOSS loudspeaker cabinet integrity, including all joinery, fasteners, handles and wood, is warranted against defects in materials and workmanship for a period
of six (6) years from the date of purchase. This warranty does not cover items that are intended to wear and can be replaced if worn or damaged. Examples of items
not covered by this warranty are cabinet feet, grills and the finish or coating applied to the cabinet.
ENHANCED COMPONENT WARRANTY
BASSBOSS amplifiers and electronic components are covered against failures due to defects in materials and/or workmanship for a period of three years from the
date of purchase.
NO WORRIES WOOFER WARRANTY
Transducers, including burned or open voice coils in subwoofers, are covered for two years from the date of purchase.
OUR SUPPORT
It is our goal to provide trouble-free loudspeakers. That objective begins as part of the design phase and continues on through to any service you may require. In order
to be able to provide the lowest possible failure rate, the best possible warranty service and the fastest turn-around time, we request that you contact us immediately
if you notice any problem with your system, and before you attempt any repairs. We can provide the best and fastest solution if we know the details of the problem
before any repair attempts are made. Often BASSBOSS technicians can troubleshoot problems that may arise and no repair or further service will be necessary.
Warranty support is a service, and part of that service includes helping you prevent failures and minimize repair and shipping costs. Please do not ship products
without first obtaining a return authorization number by calling 512-368-3268 (855-822-7770 toll-free) or by emailing [email protected]. BASSBOSS service
technicians will provide assistance and instructions on shipping and packaging requirements specific to your service needs.
WARRANTY LIMITATIONS
During the warranty period, if your loudspeaker malfunctions or fails due to any defect in components or manufacturing, the failed parts will be repaired or replaced.
This warranty does not extend to damage resulting from improper installation, misuse, neglect or abuse. Warranty coverage and eligibility will be determined upon
inspection by BASSBOSS personnel. This warranty does not cover labor other than that authorized and performed by BASSBOSS personnel. Service will be performed
upon the return of the failed unit, together with its original sales receipt or other proof of purchase, to BASSBOSS or an Authorized Service Facility. Purchaser is
responsible for all costs of shipping and handling. Cosmetic damage is specifically excluded from this warranty. This warranty is rendered void if service, repairs
and/or modifications are attempted or made by anyone not specifically authorized by BASSBOSS to perform said services. Please contact BASSBOSS or your local
BASSBOSS dealer before attempting any repairs and before shipping parts in for service.
This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. For more information concerning BASSBOSS service
and warranty policies please contact us at 512-368-3268 or [phone] toll-free.
EXPORT WARRANTY
BASSBOSS products can be purchased worldwide. In countries without local BASSBOSS distributors, product requiring service must be shipped back to the US for
warranty repairs. In most cases, the entire cabinet will not need to be shipped. Generally only the individual affected parts will need to be shipped to the factory for
servicing. Please contact BASSBOSS before attempting any repairs and before shipping parts in for service.
SHIPPING AND PACKAGING
Please package your returns safely and securely. BASSBOSS does not cover damage that occurs in transit. Freight insurance is recommended.

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FCC COMPLIANCE NOTICE
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired
operation.
CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
EC DECLARATION OF CONFORMITY
Manufacturer:
True Lee Loudspeakers, LLC – BASSBOSS
9501 Cargo Ave Ste 600 Austin TX 78719
We declare that under our sole responsibility the product: AT312 MicroMain
Intended use: Professional Audio Loudspeaker
Are in conformity with the provisions of the following EC Directives, including all amendments, and with national legislation implementing these directives:
• 2006/95/EC Low Voltage Directive
• 2004/108/EC Electromagnetic Compatibility Directive
• 2002/95/CE RoHs Directive