MARTIN AUDIO iK81 Advanced 4 Channel Power Amplifier User Guide
- June 16, 2024
- MARTIN AUDIO
Table of Contents
- MARTIN AUDIO iK81 Advanced 4 Channel Power Amplifier
- Product Information
- Product Usage Instructions
- Frequently Asked Questions
- IMPORTANT SAFETY INSTRUCTIONS
- INSTALLATION INSTRUCTIONS
- Introduction and Key Features
- Audio Connections
- Operation
- Incident Reporting
- Technical Specifications
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
MARTIN AUDIO iK81 Advanced 4 Channel Power Amplifier
Product Information
Specifications
- Model: iK81 / iK42
- User Guide Version: V1.0
- Compliance: LVD (electrical safety) 73/23/EEC, EMC (electromagnetic compatibility) 89/336/EEC
- European Standards: EN60065 Product safety, EN55103-1 EMC emissions, EN55103-2 EMC immunity
- Electromagnetic Environments: E1, E2, E3 & E4
- Earthed: Yes
- Cable Length: Maximum of 2m
- Cable Rating: 300/500V
- Cable Compliance: EN50525-2-11 / H05W-F
- Designed for: Permanent installation in a 19 rack enclosure
- UL Compliance (USA): UL60065 7th edition
- USA Cable Length: Maximum of 6′
- USA Cable Rating: SJ, SJT, SJE or 300/500V H05W-F
- USA Cable Marking: VW-1
Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS:
- Read these instructions.
- Keep these instructions.
- Heed all warnings.
- Follow all instructions.
- Do not use this apparatus near water.
- Clean only with dry cloth.
- Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including amplifiers) that produce heat.
- Do not defeat the safety purpose of the polarized or grounding type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
SAFETY WARNING:
- Do not remove any covers, loosen any fixings or allow items to enter any aperture.
SAFETY WARNING:
- The rear of the product may get hot. Avoid direct skin contact during operation and for at least 5 minutes after power has been isolated.
SAFETY WARNING:
- The product must only be positioned at floor level when operated in a horizontal position.
Product Usage Instructions
Earthed Connection:
This product must be earthed. Use only a flexible cable or cord with a green and yellow core which must be connected to the protective earthing terminal of a suitable mains plug or the earthing terminal of the installation. The cord must be a maximum of 2m long, have a 2.5mm2 CSA, a 300/500V rating and comply with EN50525-2-11 / H05W-F.
Permanent Installation:
This product is designed for permanent installation. It must be fitted into a 19 rack enclosure and should not be operated unless installed. The rack enclosure should be open at the front and back to allow free ventilation and movement of air through the product.
Frequently Asked Questions
- Q: Is this product compliant with European safety standards?
- A: Yes, this product complies with both the LVD (electrical safety) 73/23/EEC and EMC (electromagnetic compatibility) 89/336/EEC directives issued by the commission of the European community. It conforms to European standards EN60065 for product safety, EN55103-1 for EMC emissions, and EN55103-2 for EMC immunity.
- Q: Does the product come with an earthed connection?
- A: Yes, this product must be earthed. Please use a flexible cable or cord with a green and yellow core to connect to the protective earthing terminal.
- Q: Can I use this product near water?
- A: No, it is not recommended to use this apparatus near water for safety reasons.
- Q: Can I clean the product with a wet cloth?
- A: No, please clean only with a dry cloth to avoid any damage or electrical hazards.
- Q: Can I install this product near heat sources?
- A: No, it is advised not to install this product near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat to prevent any potential damage or safety hazards.
- Q: Can I remove the covers of the product?
- A: No, it is strictly advised not to remove any covers, loosen fixings, or allow any items to enter any aperture of the product to ensure safety and proper functioning.
- Q: Can I operate the product without permanent installation in a rack enclosure?
- A: No, this product is specifically designed for permanent installation in a 19 rack enclosure. It should not be operated unless properly installed. The rack enclosure should have open fronts and backs for proper ventilation and airflow.
USER GUIDE
IMPORTANT SAFETY INSTRUCTIONS
- Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with dry cloth. 7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including amplifiers)
that produce heat. 9. Do not defeat the safety purpose of the polarized or grounding type plug. A polarized plug has two blades with one
wider than the other. A grounding type plug had two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10. Protect the power cable from being walked on or pinched particularly at plugs, convenience receptacles and the point where they exit from the apparatus. 11. Only use attachments / accessories specified by the manufacturer. 12. Use only with the cart, tripod, bracket or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart / apparatus combination to avoid injury from tip-over. 13. Unplug this apparatus during lightning storms or when unused for long periods of time. 14. Refer all servicing to qualified service personnel. Service is required when the apparatus has been damaged in any way, such as power-supply cable or plug damaged, liquid has been spilled or objects have fallen into the apparatus, this apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
SAFETY WARNING
Do not remove any covers, loosen any fixings or allow items to enter any aperture.
SAFETY WARNING
The rear of the product may get hot. Avoid direct skin contact during operation and for at least 5 minutes after power has been isolated.
SAFETY WARNING
The product must only be positioned at floor level when operated in a horizontal position.
USER GUIDE
COMPLIANCE
FOR CUSTOMERS IN EUROPE
This product complies with both the LVD (electrical safety) 73/23/EEC and EMC
(electromagnetic compatibility) 89/336/EEC directives issues by the commission
of the European community.
Compliance with these directives implies conformity with the following
European standards:
EN60065 Product safety
EN55103-1 EMC emissions
EN55103-2 EMC immunity
This product is intended for the following electromagnetic environments: E1,
E2; E3 & E4.
THIS PRODUCT MUST BE EARTHED. Use only a flexible cable or cord with a green
and yellow core which must be connected to the protective earthing terminal of
a suitable mains plug or the earthing terminal of the installation. The cord
must be a maximum of 2m long, have a 2.5mm2 CSA, a 300/500V rating and comply
with EN50525-2-11 / H05W-F.
THIS PRODUCT IS DESIGNED FOR PERMANENT INSTALLATION. It must be fitted in to a
19″ rack enclosure and not operated unless so installed. The rack enclosure
should be open at the front and back to allow free ventilation and movement of
air through the product.
FOR CUSTOMERS IN THE USA
This product complies with UL60065 7th edition.
THIS PRODUCT MUST BE EARTHED. Use only a flexible cable or cord with a green
or green / yellow core which must be connected to the protective earthing
terminal of a suitable mains plug or the earthing terminal of the
installation. The cord must be a maximum of 6′ long, be 14AWG, have a rating
SJ, SJT, SJE or 300/500V H05W-F and be marked VW-1.
THIS PRODUCT IS DESIGNED FOR PERMANENT INSTALLATION. It must be fitted in to a
19″ rack enclosure and not operated unless so installed. The rack enclosure
should be open at the front and back to allow free ventilation and movement of
air through the product.
DECLARATION OF CONFORMITY WITH FCC RULES
We, Martin Audio Ltd. of Century Point, Halifax Road, Cressex Business Park,
High Wycombe, HP12 3SL, England, declare under our sole responsibility that
this family of devices, 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.
FEDERAL COMMUNICATIONS COMMISSION NOTICE
An example of 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 and commercial installation.
This equipment generates, uses, and can radiate radio frequency energy, and if
not installed and used in accordance with the instructions, 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
and correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Increase the distance between the
equipment and the receiver. Connect the equipment to 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.
FCC Caution: Any changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate this
equipment.
USER GUIDE
FOR CUSTOMERS IN CANADA
This product complies with CA /CSA C22.2 No.60065-03
Ce produit est conforme avec CA /CSA C22.2 No.60065-03
THIS PRODUCT MUST BE EARTHED. Use only a flexible cable or cord with a green
or green / yellow core which must be connected to the protective earthing
terminal of a suitable mains plug or the earthing terminal of the
installation. The cord must be a maximum of 6′ long, be 14AWG, have a rating
SJ, SJT, SJE or 300/500V H05W-F and be marked VW-1.
CE PRODUIT DOIT ÊTRE MIS À LA TERRE. Utilisez uniquement un câble souple avec
un noyau vert ou vert / jaune qui doit être relié à la borne de terre de
connecteur d’alimentation ou la borne de terre de l’installation. Le cordon
doit être un maximum de 6′ (2m) de long, 14 AWG (2.5mm2 CSA), être classé SJ,
SJT, SJE ou 300/500V H05W-F et être marquée VW-1
THIS PRODUCT IS DESIGNED FOR PERMANENT INSTALLATION. It must be fitted in to a
19″ rack enclosure and not operated unless so installed. The rack enclosure
should be open at the front and back to allow free ventilation and movement of
air through the product.
CE PRODUIT EST CONÇU POUR UNE INSTALLATION PERMANENTE. Il doit être installé
dans un boîtier rack 19 “. Le rack devrait être ouvert à l’avant et l’arrière
pour permettre la ventilation et le mouvement d’air libre à travers le produit
.
DECLARATION OF CONFORMITY WITH CANADIAN ICES-003
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du
Canada.
Thanks and Unpacking
Thank you for choosing a Martin Audio iK42/iK81 Series Advanced System
Amplifier for your application. Please spare a little time to study the
contents of this manual, so that you obtain the best possible performance from
this unit.
All Martin Audio products are carefully engineered for world-class performance
and reliability.
If you would like further information about this or any other Martin Audio
product, please contact us. We look forward to helping you in the near future.
Unpacking the Martin Audio iK42/iK81 Series Amplifier
After unpacking the unit please check carefully for damage. If damage is
found, please notify the carrier concerned at once. You, the consignee, must
instigate any claim. Please retain all packaging in case of future re-
shipment.
USER GUIDE
INSTALLATION INSTRUCTIONS
Mechanical Installation
The iK42/iK81 Series Amplifier system is designed to be mounted in a standard
19″ rack enclosure.
Where the amplifier is used in a fixed installation, as long as the bottom
unit is supported and there are no gaps between units, it is acceptable to use
only the front panel 19″ rack holes when fitting it in a standard rack
enclosure. If the amplifier is mounted in a mobile rack it is important that
the rear is supported with a rear rack mounting kit (part number IKRACK).
Damage caused by insufficient support is not covered by the warranty.
To prevent damage to the front panel it is recommended that plastic cups or
washers are fitted underneath the rack mounting bolt heads.
It is possible to mount multiple iK42/iK81 Series amplifiers without
ventilation gaps between them but it is essential that an unobstructed flow of
clean air is available from the front of the unit to the rear. It is important
that neither the air intakes on the front of the unit or the exhaust vents at
the rear are covered. Steps must be taken to ensure that hot air does not
continually circulate through the amplifiers from the back of the rack to the
front.
The amplifier should never be exposed to rain or moisture during operation or
storage. If the unit does come into contact with moisture, remove the AC power
cable immediately and leave it in a dry and warm location to dry out.
Note that when any equipment is taken from a cold location into a hot humid
one, condensation may occur inside the device. Always allow time for the
equipment to attain the same temperature as its surrounding environment before
connecting the AC power cable.
IMPORTANT
USER GUIDE
It is the responsibility of the user to ensure that dirt, liquids and vapour
from theatrical smoke and fog machines is not ingested by the amplifier.
Damage so caused is not covered by the manufacturer’s warranty.
AC Power Connection
The amplifier utilises a 32A Neutrik PowerConTM type locking AC power
connector. Use only an AC power cable with a correctly terminated PowerConTM
type connector to make the connection to the mains power supply.
The amplifiers are designed to operate on 50/60 Hz AC power. The power supply
sections automatically configure themselves for either 115V or 230V nominal
voltage at turn on. The amplifiers will operate over an extended range of
supply voltages (please refer to the technical specifications).
Note that whilst the amplifier will operate correctly at voltages indicated,
the specified output power will only be achieved when operating with the
stated nominal voltages.
USER GUIDE
The User Guide
This user manual gives a progressively more detailed description of the
functions of the Martin Audio iK42/iK81 Series Advanced System Amplifiers. A
single page quick reference guide is provided for those users who are
experienced with this type of equipment and just need to know how to `drive’
the front panel. A detailed explanation of the front and rear panel controls
and indicators is contained in the next section.
The final section describes each individual function or feature with annotated
images explaining its use. Where appropriate, the graphical display is shown
to further elaborate on the units operation.
To complete the manual a reference section is included, describing the
technical performance of the device complete with graphs of filter responses.
USER GUIDE
Introduction and Key Features
Introduction
The Martin Audio iK42/iK81 Series Advanced System Amplifier represents current
state-of-the-art technology in several areas. This product is the result of
several years of research, from which many advances in switched mode power
technologies and ever finer detail in signal processing have stemmed. Taking
advantage of the latest advances in analogue to digital conversion
technologies, the unit achieves performance levels among the very best that
engineering permits.
Below is a list of key features, followed by some information on the major
advanced features of the product.
Key Features
Four/Eight channels of sonically pure Class D amplification Very high power
density – packs four channels and 20kW or eight channels and 10kW into just 2U
of rack space Packed with robust protection and monitoring systems to keep the
show going External Breaker Protection (EBP) limits the current draw to
prevent breakers opening Martin Audio minimal signal path design Class leading
sonic performance achieved by the use of state of the art Amplifier
technologies and highly advanced DSP
algorithms using Linea Micro Detail (LMD) 96kHz sampling frequency provides
for a nominally flat response beyond 40kHz. Rotary encoders, illuminated
buttons and graphical display provide a rapid, intuitive and user-friendly
control interface High speed Ethernet communications supporting DHCP, static-
IP and auto-IP and direct connection to a computer
without the need for a router or a switch Powerful Drive Module concept,
abstraction from device centric to speaker based control Innovative Component
Presets to allow individual outputs to be used for selected drivers of a
loudspeaker system Twelve layers of Parameter Overlays for trouble-free
Grouping Unique VX limiter providing dynamic control for passive 2-way
enclosures Unique LIR linear phase crossover shapes giving FIR-like
performance without the drawbacks Linear phase HF system EQ profiling which
provides perfect integration between enclosures Innovative excursion control
limiter with sliding High Pass Filter; limits only the damaging low
frequencies Transducer thermal modelling provides regulation limiters,
addressing long term overload Overshoot limiter governs amplitude of transient
signals retaining average power whilst constraining peak energy Dante audio
networking with automatic fall-over to Analogue or AES3 AES3 inputs
Drive Modules
The iK42/iK81 Series processor has a new way of ordering and grouping channels
in order to give a more speaker-based approach to controlling, designing and
recalling speaker configurations; these are called Drive Modules. A Drive
Module is the Processing provided by one Input DSP Block, and a number of
Output DSP Blocks, which are associated with one-another by means of routing.
For example, if Input DSP Block B is routed to Outputs 3 and 4, then this is a
2-way Drive Module with Input DSP Block B forming the `Master’ control, and
Output DSP Blocks 3 and 4 providing the driver-related control. Overall, this
forms the processing typically for one loudspeaker sub-system. The Vu-Net
Drive Module control panel for this sub-system may then be used for control
and monitoring of the associated speaker.
Drive Modules may be included in Module Groups, which use the Parameter
Overlay feature in the Device to achieve trouble- free Grouping in the Vu-Net
application.
The Presets in the Device are Drive-Module centric, and are used to configure
individual Drive Modules rather than the whole device.
Importantly, Drive Modules move the focus away from the processing device, and
onto the loudspeaker systems.
A Drive Module Preset may be broken apart into Components, allowing any output
to be used for any component within a Drive Module Preset (i.e. any driver in
a loudspeaker subsystem).
See Overview of Modules
Overlays
USER GUIDE
When the Device is used in Modules view in Vu-Net, this allows the modules to
be grouped into Overlay Groups. These groups allow various Input (master)
parameters to be adjusted in all modules in that group, whist maintaining
independent parameter values across each group. This is achieved in the device
by combining the parameters for all the layers for a given section (Gain
Delay, EQ etc.). When an Overlay parameter is active, the Overlay indicator
will become illuminated. The combined Gain or Delay etc. associated with a
given section is shown on the module panel in Vu-Net, within square brackets [
] under the Delay and Gain for each input channel. The combined EQ curve is
shown in an olive colour. The Input Mute button in Vu-Net will flash if an
overlay mute is active. On the device, the presence of an active overlay is
generally indicated by square brackets “[]” after the parameter value on the
display. An input overlay mute is indicated on the mute/clip indicator for
that channel flashing. Note that overlay parameters cannot be adjusted on the
Device itself; these can only be controlled by the Vu-Net application.
However, overlay parameters may be removed on the device see Overlay Flush.
Note that overlays are not stored in presets or snapshots or carried in
settings files.
LIR Linear Phase Crossover Filtering The Device also includes a new type of
crossover filtering “Linear Impulse Response” (LIR) crossover filtering, which
results in a Linear Phase crossover that has a constant delay regardless of
frequency (unlike other types of crossover which delay different frequencies
to a different extent, thus smearing the arrival time). The LIR crossover can
thus be described as having a flat Group Delay response, and thus entirely
free of Group Delay Distortion.
The shape of the LIR crossover filter is quite similar to a 4th order or
24dB/Oct Linkwitz-Riley filter, and maintains zero phase difference between
the adjacent bands across the crossover region to keep the polar response rock
steady.
FIR Linear Phase Equalisation
The Input High-Shelf Equalisers use Finite Impulse Response (FIR) filtering to
produce Linear Phase equalisation; that is all frequencies are delayed by the
same amount, perfectly preserving the transient response. This can also be
important in applications where different amounts of EQ are applied to
different parts of a speaker cluster, such as to add ‘Throw’ EQ boost so that
parts of cluster which are throwing further can have HF absorption correction
added. If this EQ is not linear phase, then the zones where the speakers
combine may suffer frequency response anomalies.
USER GUIDE
Audio Connections
Input Connections
For each input channel there is a female XLR connector for analogue inputs.
There is also one female XLR for one stream (two channels) of AES3 digital
audio. Note that only two channels of AES3 digital audio are available. The
Dante option permits more channels of Digital Audio inputs.
The HOT, + or in phase’ connection should be made to pin 2 of the XLR connector. The COLD, – or
out of phase’ connection should be made to pin 3 of the XLR
connector.
Pin 1 of the XLR connectors is internally connected to the chassis. The shield
of the input cable should always be connected Pin 1 of the XLR to ensure that
EMC performance and regulations are met.
3
Using unbalanced connections
Please note that the use of unbalanced connections is not recommended, however
when connecting the amplifier to an unbalanced audio source, the signal
conductor should be connected to XLR pin2. The `Cold’ conductor or cable
screen should be connected to XLR pin 1 with a short connection made between
pin 1 and pin 3.
Amplifier Output Connections
The iK42 amplifier is fitted with one SpeakonTM connector per amplifier
channel. The appropriate conductor terminations are shown below and on the
rear panel of the unit.
USER GUIDE
Amplifier output connections iK42
2-
Additionally, the channel 2 output is duplicated on the SpeakonTM connector
for amplifier channel 1 for Bi-Amp wiring. Similarly, the channel 4 output is
duplicated on the SpeakonTM connector for amplifier channel 3. This can be
useful for making a connection to two loudspeakers with one 4-core cable (i.e.
Bi-Amp).
On the iK81 model, all outputs are Bi-Amp; each SpeakonTM connector carries
two amplifier outputs Channels 1&2, Channels 3&4, Channels 5&6 and Channels
7&8.
Amplifier output connections iK81 and Bi Amp
In addition, the channel 1 or channel 3 connector (all the SpeakonTM
connectors on the iK81 model) can also be used if the pair of amplifier
channels is being operated in bridged mode.
Amplifier output connections Bridge
More than one speaker can be connected to each channel provided the total impedance per channel is not less than 2 ohms. In bridged mode the minimum total impedance should not be less than 4 ohms.
USER GUIDE
Load Matching
Each output of the device can be optimised to drive either a low impedance
load (e.g. 2, 4 or 8 Ohms), or a Constant Voltage (C.V.) using the Load
parameter in the Output menu. There are several C.V. settings (25V, 70V and
100V Line) which determine the maximum RMS voltage that the amplifier will
produce. Select the one which is appropriate for the installation. A number of
low impedance settings (depending on the model) are also available. Although
it is not critical that this setting matches the impedance of the connected
load, this will maximise the power that is available for the load.
USER GUIDE
Panel Layouts
(The iK42 is illustrated. The iK81 is similar, but with double the quantity of
output indicators and mute buttons)
1. Power Switch- Applies mains power to the device. If the device has entered
Sleep mode, it may be woken up again either from the Vu-Net application, or by
switching this switch off, then on again.
2. Graphical Display- This will show the Home screen; a useful overview of
channel allocation. On most pages the currently selected channel and parameter
information is displayed on the upper part of the screen and the parameter
value on the lower part of the screen. The screen contrast can be changed by
pressing the
3. Status Indicators- The “OVERLAY” indicator shows when there are parameters
active on a group layer, which the user cannot access through the front panel
of the device (see Overlay Flush). The “DANTE” indicator shows that a Dante
network feed is routed. The “ONLINE” indicator has three states: Off the
unit is offline and not connected to a computer or network. Flashing- the unit
is searching for an IP address; if the unit does not find an IP address the
unit will assign itself an IP address automatically and the indicator will
stop flashing. On- the unit is online and connected with software. IP settings
can be viewed or changed within the
4. Parameter Encoders- Two velocity sensitive parameter encoders are used to
adjust parameters shown on the display. Up to three parameters at a time are
displayed on the screen. The parameter name is shown above the parameter value
in each of the three screen sections. Use SELECT to highlight the parameter,
then ADJUST to change it.
5. Page Selection Buttons- When one of the buttons ,