BassBoss ZV28-MKII User manual

User’s Manual
Dual 18”
Powered Subwoofer
ZV28-MKII

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Groundbreaking Performance
Ultra-Low Notes: -3dB at 21Hz (Pair)
Super-High Continuous Output
Deepest High-Output Sub for its Size
Description 3
Specifications 4
Setup Instructions 5
Operation and Controls 6
Cardioid Switch 6
Photos 7
Troubleshooting 8
Flash Sequence Codes 8
Safety Information 9
Warranty 10
FCC Compliance Notice 11
Table of contents
ZV28-MKII
Dual 18” Powered Subwoofer

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The BASSBOSS ZV28-MKII Subwoofer delivers bass so low as to be at the very limits of human hearing. Notes that are simply
not present with other subwoofers are fully realized by the ZV28-MKII, and frequencies that stress lesser subs are reproduced
eortlessly and powerfully. The ZV28-MKII must be felt as well as heard to be truly appreciated.
Improved performance of MKII:
• Even More Deep Bass
• Increased SPL at very low frequencies
• Decreased distortion at very low frequencies
• Stier construction – more bracing
• Stronger grill for improved protection.
• Bold new look!
For super-low modern bass music, just two cabinets will produce exceptional levels of extraordinarily deep bass. The ZV28-MKII
is designed to deliver an intensely physical experience for the audience. No other manufacturer produces a sub as powerful and
low as the ZV28-MKII at a similar price point and physical size.
The ZV28-MKII was independently measured at Ultra Music Fest 2013 to achieve at frequency response to 21Hz (-3 dB) at
audience distance. A sub system of only sixteen ZV28-MKII Subs and eight Z5/D Subwoofers was used to create a legendary
gig for close to 10,000 screaming fans. The ZV28-MKII utilizes extreme eciency to supply ultra-high performance with very few
subs.
Includes a 4000W amplier with integrated, comprehensive DSP. The ZV28-MKIIs are vented, direct radiating subwoofers with
a large internal volume and a very low tuned frequency. Anti-standing wave baes and pass-through dampers minimize upper
resonances while very large ports maximize low frequency performance at high output. Protection systems and limiters control
all manners of overload, including thermal, excursion and clipping.
The ZV28-MKII is optimized for full-power operation. It is designed to operate at full rated RMS power throughout its operating
range while ensuring the woofers remain within their excursion and thermal limits.The ZV28-MKII delivers consistently at
frequency response, and a pair delivers response that is -3dB at 21 Hz. No equalization is required to achieve this response and
it is available at high levels in real-world applications, continuously. The ZV28-MKII’s sensitivity is achieved and maintained
though careful optimization, the use of premium components and innovative, proprietary thermal management techniques.
Thanks to the deep-bass sensitivity, the robust components and the prodigious power, massive low end is delivered on demand.
The ZV28-MKII is not a paper tiger. Other subwoofers can be made to look similar on paper, but come up short in the eld.
Beware of loudspeaker systems that require processing to achieve their claimed frequency response. Those systems are still
subject to the excursion and thermal limits of their drivers. Boosting low frequency EQ to achieve extended low-frequency
response on specication charts isn’t the way to deliver superior results at maximum power. In fact, boosting low frequency
EQ is likely to result in excessive distortion or woofer damage at full power. Under those circumstances the system cannot be
utilized at full power. If limiting is applied to avert such failure, that limiting prevents the realization of the claimed frequency
response at full power.
The ZV28-MKII’s woofer cones are waterproofed. The cabinets are safe to use outdoors where they may encounter rain, in
nightclubs where drinks may be spilled on them, or in dusty environments that may leave the drivers needing a thorough
cleaning.
A two-year no-fault warranty is oered on the subwoofer drivers above and beyond the standard warranty. We are able to oer
this extraordinary coverage due to the ZV28-MKIIs (and all BASSBOSS subs) innovative design and engineering which utilizes
the best of current technology to virtually eliminate blown drivers.
Engineered to work hard and continue to work where others fail. With the peace of mind aorded by plentiful, clean, undistorted
output and comprehensive protection systems, you can condently push the ZV28-MKII to levels and depths that would require
more or bigger cabinets from other manufacturers.
Description:

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SPECIFICATIONS
Dual 18” Powered Subwoofer
ZV28-MKII
Loudspeaker Description: Extended Low-Frequency Dual 18” Powered Subwoofer
Frequency Response (±3 dB): 24 – 90 Hz
Frequency Response, Pair (±3 dB): 21 – 90 Hz
Maximum Sustained Output: 134 dB SPL, 1 meter, half-space (ground plane)
Max SPL (Peak)* 142 dB
Nominal Dispersion (H° x V°): 360 x 360 – Cardioid mode available with multiple boxes
Acoustical
Amplification: 4000 Watt Continuous RMS Class D Subwoofer Amplifier
Processing: Integrated comprehensive DSP provides high pass, low pass, phase alignment and limiting
Electrical Connectors, Amplifier: Neutrik powerCON input (Blue) NAC3FCA, Neutrik powerCON through (Grey) NAC3FCA
Electrical Connector, Mains: Standard US 3-pin 120V electrical plug: NEMA 5-15 (Edison), Optional electrical plugs available,
including L5-30 and others, upon request.
Voltage Operating Range: 90-132VAC, 55-65Hz
Current Draw, Nominal: 564 W, 4.7A @ 120 Volts (typical, 1/8 max power)
Signal Input Connector: XLR-F
Signal Output Connector: XLR-M (pass-through only)
Electrical
Enclosure Type: Direct radiating, vented enclosure, optimally tuned for extremely low frequency response
and excellent electrical conversion efficiency
Transducer: 2 x 18” diameter (457 mm) neodymium motor woofer with 4.5” (115 mm) copper winding voice coil
and 56 mm (2.2”) peak to peak excursion, waterproof fiber composite cone
Cabinet Construction: 18 mm Baltic Birch plywood, extensively braced. Equipped with 16 flypoints, 8 steel handles,
2 pole sockets, 4 large rubber feet, and 4 interlocking foot pockets
Dimensions (HxWxD): 22.5” x 42” x 42” (57.15 cm x 106.68 cm x 106.68 cm) - 23.25” (59.05 cm) high with feet
Net Weight: 225 lbs (102 kg)
Shipping Weight: 240 lbs (109 kg)
Exterior Finish: Rugged, weatherproof, black textured, bonded high-pressure polyurethane coating
Grill: Perforated, powder-coated steel
Pole Sockets: 2 (35 mm)
Handles: 8 Steel Handles
Physical
Flying Hardware: Side-pull anchors and/or shoulder eye-bolts
Suspension System: 16 x 3/8”-16tpi threaded flypoints
Amplification for Installation: Complete power package including DSP in two space rack chassis for
permanent installations
Installation Version: Available without handles and pole sockets
Transport Dollies: Dolly cart with 4 locking casters and recesses to accept interlocking cabinet feet for transporting
1 to 3 cabinets
Covers: Heavy-duty padded nylon transport covers for 1 or 2 cabinets
Online Information: bassboss.com/zv28
Optional
Our proactive philosophy causes specifications to be subject to change whenever improvements are made.
*Peak output is calculated using “industry standard” techniques. These calculation methods create theoretical specications that are inated over what can actually be
achieved. BASSBOSS real world output specications are provided as “Maximum Sustained Output” ratings, which reect actual measured, continuous output levels.

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Setup Instructions:
1. Place loudspeaker in the desired location. Ensure that it is secure and stable.
2. Rotate the input attenuator knob counter-clockwise to the lowest setting.
3. Connect signal from the sound source (mixer) via the XLR female input jack.
4. Connect the XLR male output to the next available loudspeaker input via an XLR cable (if applicable.)
This is a full-range pass-through connection and no processing is applied to this output.
5. Connect the Neutrik PowerCON (blue) connector to the blue power inlet socket. Do not force. To insert, align the
indexing tabs on the connectors, insert the plug fully into the socket and rotate clockwise until the latches catch.
To remove, pull back on the latch tab and rotate the connector counter-clockwise to the index stop, then
pull outwards.
6. Work backwards from the speakers to the outlets, making all PowerCON connections before plugging in to mains power.
7. Connect the electrical plug to a power source.
8. Move the POWER switch to the ON position.
9. Rotate the input attenuator clockwise to achieve the desired sound level.
The integrated DSP includes all the required processing for safe operation and alignment with the accompanying BASSBOSS
top boxes. DO NOT USE third-party outboard processing with BASSBOSS powered loudspeakers. This will not improve, and
will most likely degrade the sound quality and output capacity.
When connecting multiple BASSBOSS loudspeakers in a system, signal can be passed through from one powered
loudspeaker to another using 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 rst and patch to the next nearest box in sequence.
When connecting BASSBOSS speakers in a system including other brands of loudspeakers, it’s recommended to connect
the BASSBOSS speakers rst in sequence, then connect other speakers to the pass-through outputs. This ensures that no
inappropriate processing is applied to either loudspeaker.
The total power draw of one ZV28-MKII amplier module is 15A. Only one ZV28-MKII should be connected to a 20A circuit.
The typical power draw of one ZV28-MKII amplier module is 5A. With heavy demand, the current draw can peak at 20A for
brief periods but under NEMA code, a 20A breaker should sustain a peak draw of 40A for several seconds without tripping.
In situations where circuits must be shared with other equipment or other brands, it’s recommended to power combinations
of a BASSBOSS subwoofer and a top on a circuit and to power each subwoofer and top combination on a separate circuit to
reduce the chances of overdrawing a circuit and tripping a breaker.

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There are 2 control knobs on the amplier.
1: GAIN
Provides attenuation of the input from o to full output. Use appropriate gain structure to ensure the output feeding the subwoofer
doesn’t reach clipping and distortion before maximum desired sound level is achieved. The amplier has a complement of limiters
and safeties to protect itself and the driver however, if audible distortion occurs, lower the level of the incoming signal.
2: EXO ADJUST
This control adjusts the eective crossover frequency allowing the subwoofer to be used with multiple sizes and styles of top boxes
while minimizing out-of-bandwidth noise and phase shift in the crossover region. Rotating the EXO knob fully counter-clockwise
(left) results in an eective crossover frequency of 80Hz. Rotating it fully clockwise (right) results in an eective crossover frequency of
100Hz.
3. CARDIOID SWITCH
Toggle Switch allows selection between NORMAL mode and CARDIOID mode.
With the switch in the NORMAL (up) position, the speaker is in normal operating mode and any number of cabinets can be arrayed
side-by-side facing the same way when they are all in NORMAL mode.
When CARDIOID operation is desired, one or two cabinets must be used in NORMAL mode and at least one cabinet must be placed
in CARDIOID mode and its position reversed relative to the other cabinet(s) The ideal ratio is 2 cabinets in NORMAL with one
CARDIOID cabinet between them vertically or horizontally.
Reduced NORMAL >> Audience
Level << CARDIOID Audience
Area NORMAL >> Audience
The NORMAL mode cabinet(s) are used with the woofer facing towards the audience. The CARDIOID mode cabinet is rotated with
the woofer away from the audience and the CARDIOID SELECT SWITCH in the CARDIOID (down) position.
The cabinet in CARDIOID mode should have the EXO knob at the lowest level, rotated fully counter-clockwise. The EXO setting on
the NORMAL mode cabinet(s) can be set to taste but all cabinets in NORMAL mode should be set the same.
Note: When the speaker is in CARDIOID mode, the green PWR LED is disabled because it will be facing the audience. The speaker
will still power up and play.
When only two cabinets are used, the cabinet in CARDIOID mode can be placed on top of the cabinet in NORMAL mode.
The cabinet in CARDIOID mode can also be placed adjacent to the NORMAL mode cabinet, with the NORMAL mode cabinets placed
farther from the stage or area where reduced level is desired. When only 2 cabinets are in use, the CARDIOID mode cabinet GAIN
should be reduced by 3dB. The greatest level reduction occurs on axis with a line drawn from the center of the NORMAL cabinet’s
bae, through the center of the CARDIOID cabinet’s bae.
Reduced << CARDIOID (-3dB) Audience
Level NORMAL >> Audience
Area Audience
Operation and Controls:
Three-dimensional
representation of cardioid
output pattern.

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If, after following the above instructions for setup, you have no output from the loudspeakers:
Verify that the green power (ON) LED is lit. If not, check the following:
(Note: The ON LED is disabled when CARDIOID mode is selected. To check for power, switch to
NORMAL mode to illuminate the LED)
1. Is the power cord plugged into a live outlet?
2. Is the Neutrik PowerCON connector rotated into the locked position?
3. Is the Power Switch on?
If the green power LED is on, check the following:
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 owing to the input? Check the integrity of the cable by using a dierent cable.
4. Is the attenuator turned all the way down or at a very low level?
5. Is the signal owing to the input full-range? Filters in the signal may remove the operating
frequencies of the loudspeaker receiving them.
Troubleshooting:
Flash Sequence Codes for Warning Indicators and Protection Modes (Seen on Amp LED)
Long ashes followed by short ashes:
1-0 GROUND NOT CONNECTED: Amp still runs. Blinks 10 times on power-up then stops. Check power cord and
outlet wiring.
1-1 LINE HOT AND NEUTRAL REVERSED: Amp still runs. Blinks 10 times on power-up then stops. Check power cord
and outlet wiring.
1-2 GROUND NOT CONNECTED IN 240V MODE: Amp still runs. Check power cord and outlet wiring.
2-0 GFI TRIP: Amp shuts down. Power cycle to restore.
3-0 OVERHEAT SHUTDOWN: Amp shuts down. Restarts when temperature falls.
3-3 THERMAL LIMITER ACTING: Gain reduced to limit heat buildup. Amp still runs.
4-1 FAULT FROM GATE PCB WHILE AMP WAS WORKING: Amp shuts down. Service Required.
4-2 FAULT FROM PFC: (240V option only) Amp shuts down. Service Required. (May reset with power
cycle if false triggered.)
4-3 GFI MALFUNCTION: Amp shuts down. Service Required.
4-5 FAULT FROM GATE PCB: Amp shuts down. Service Required.
Amplier Flash Sequence Codes:

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4-7 BROWNOUT AT POWER-UP: Amp shuts down. Power cycle to restore. Check supply voltage.
4-8 UNABLE TO START AMPLIFIER: Power Cycle to restore. Check or eliminate power conditioner.
5-0 OVER-VOLTAGE: Amp turns o or won’t start. (Seen on 120V versions when connected to 240V outlets.)
6-0 UNDER-VOLTAGE: Amp turns o or won’t start. (Seen when Generators are overdrawn or long extension
cords are in use.)
6-6 LINE LIMITER ACTING: Amp still runs. Output reduced to limit current draw.
Need more assistance? Support is available via phone or email. Email: famil[email protected] Phone: [phone] toll free
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 necessary to wear ear plugs or protective
earphones. See the manual technical specications 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 rm
surface.
Ensure that all additional hardware, xings 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 eld 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 eld. 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, modications 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 qualied, 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.
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 elds 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.
Important Notes:

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Thanks for being BASSBOSS Family!
WARRANTY INFORMATION
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 nish or coating applied to the cabinet.
ENHANCED COMPONENT WARRANTY
BASSBOSS ampliers 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 rst obtaining a return authorization number by calling
855-822-7770 toll-free or by emailing famil[email protected]. BASSBOSS service technicians will provide
assistance and instructions on shipping and packaging requirements specic 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.

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Purchaser is responsible for all costs of shipping and handling. Cosmetic damage is specically excluded from
this warranty. This warranty is rendered void if service, repairs and/or modications are attempted or made by
anyone not specically 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 specic 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 [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 aected 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 highly recommended.
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 modications 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 o 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 dierent from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
FCC Compliance Notice:

famil[email protected]
855-822-7770 toll free
www.bassboss.com
Need more assistance?
Support is available via phone or email.
ZV28-MKII
Dual 18” Powered Subwoofer