CHORD BLU MKII Ultimate CD Transport User Manual
- June 13, 2024
- chord
Table of Contents
Chord Electronics
Product Communication
BLU MKII
Manual
V.1.1
Safety instructions
1.1 Introduction
BLU MKII is a highly advanced, multiawardwinning CD transport and digital
audio upscaling device.
BLU MKII uses the world‘s most advanced audio filtering technology to achieve
an unprecedented 1,015,808 taps and can have a transformational effect on your
existing digital music collection and library.
Before operation, we strongly advise you read this user manual thoroughly.
We also recommend that you store this user manual, along with your original
receipt of purchase, in a safe place should you require assistance in the
future.
1.2 Protection against liquids & heat
BLU MKII is not protected against liquids of any kind. Never place containers
of liquid on BLU MKII. Never allow BLU MKII to come into contact with moisture
or liquids; doing so could result in electrocution or damage to the BLU MKII’s
internal circuitry.
Be aware that liquids, including water that has dried, can leave minerals that
can affect the PCB and other components, which could eventually lead to
oxidization and short-circuiting.
If the BLU MKII comes into contact with moisture or liquids, immediately
disconnect from the mains power supply, and connected equipment and contact
Chord Electronics for further advice.
The BLU MKII has internal thermal protection which will shut down the unit in
the event of excessive temperatures being reached. Never operate the BLU MKII
near sources of heat or naked flames as this will decrease the lifespan of the
internal components. It is advised that you do not operate the BLU MKII in an
area of direct sunlight or on top of significant heat- producing devices.
Please be aware that it is entirely normal for the BLU MKII to become warm
during use, particularly within a stacked configuration. If you are concerned
about the temperatures, please switch the device off or consider a different
placement.
There are no user serviceable component with in the BLU MKII.
Dangerous voltages/currents exist within the BLU MKII, posing a severe risk of
electrocution and/or fire.
Never attempt to open, dismantle or apply internal third party devices to it
or insert anything other than the listed interconnects within this user
manual.
If the BLU MKII develops a fault or the casework becomes damaged, immediately
disconnect from the mains power supply and connected equipment, and contact
Chord Electronics for further advice.
With a thick, solid aluminium chassis, the BLU MKII’s casework largely
protects the sensitive internal circuitry from radio frequency interference.
However, for optimal performance, it is recommended that the following points
are observed:
- Consider placing the BLU MKII away from wireless routers.
- Separate the BLU MKII from amplifiers using toroidal transformers.
- Operate mobile phones at a distance to avoid interference.
Although the BLU MKII is largely shielded, it can generate radio frequency interference that may have an effect on radio and television reception. If this occurs, please reconsider your placement.
1.4 Connecting your equipment
Before connecting the BLU MKII to any equipment, consult the manufacturer’s
user guide to confirm compatibility.
When connecting the BLU MKII to any equipment please make sure that all
devices are off, including the BLU MKII.
Once connected, switch all equipment on starting with the source and ending
with the amplification.
Initially, operate the any connected equipment on its lowest gain setting and
lowest volume setting, gently increasing to a comfortable listening level.
Never operate connected equipment to the BLU MKII at excessive sound levels;
permanent hearing damage and loss can occur.
The included 10 amp IEC mains lead plugs into the BLU MKII.
If the power supply is prematurely disconnected BLU MKII may still remain
active for up to 15 seconds, however, this may cause damage to connected
equipment.
Never disconnect the power cable during operation. Only disconnect when BLU
MKII is off. If the power cable is disconnected during operation there is a
risk of damage to connected equipment.
Warranty
2.1 Warranty period & registering your purchase
At point of sale, Chord Electronics Ltd. provides the BLU MKII with a
comprehensive five-year warranty which covers defects in materials and
workmanship through fair wear and tear. The warranty will be void if any other
PSU other than that supplied is used.
The warranty is transferable with proof of purchase, however is not available on ex-demonstration products.
5 FIVE YEAR WARRANTY
Please use the form below to record the details of your purchase in the event that these are required at a later date, we further advise that all purchases are registered with Chord Electronics at: chordelectronics.co.uk/register- product/
RETAILER:|
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PURCHASE PRICE:|
UNIT COLOUR:|
DATE OF PURCHASE|
TRANSACTION ID:|
2.2 Making a claim & warranty exclusions
In the unlikely event of a warranty claim, you must provide Chord
Electronics with the details of the claim, including your original proof of
purchase and serial number in order to validate the nature of the repair.
Upon receipt, Chord Electronics will make an assessment within 30 days and
provide a reasonable solution.
All warranty repairs must be carried out by Chord Electronics or an approved
service centre to guarantee the quality and safety of the repair.
WARRANTY EXCLUSIONS: The warranty does not cover connected equipment or CDs, personal injury or development natural patina of the metalwork and will be null and void if the following is applied: wilfuleglect; modification or tampering of the product; improper use of the product; acts of God; damage caused by a connected device; mechanical shock; fire or application of excessive heat or repair/modification by a nonauthorized third-party vendor.
Getting to know BLU MKII
3.1 Getting to know BLU MKII
The BLU MKII is a highly advanced standalone up scaler as well as a CD
transport, capable of redefining sound quality from digital audio.
The following pages will allow you to familiarise yourself with BLU MKII‘s
inputs, outputs, capabilities and method of operation.
3.2 The top panel
The top panel of BLU MKII is the main display that you will interact with
on a day-to-day basis. First, it features a screen that displays all the
current function of the CD transport. An in-depth explanation of its messaging
can be found on page 24.
The CD function buttons on the top of the device are used to only control
playback of the CD transport function of BLU MKII.
These cannot be used to control playback of digital audio via the USB.
On the far right you will find the CD tray. This is covered by a convex CD
lid. To access the CD tray gently leaver the knuckled at the back of the
device, confidently pushing down and away from you. Never open the CD tray
when playback is imitated.
The IR receiver is located at the front of the device. Please do not cover
this. If it is the remote control may not function.
3.3 The rear panel
The rear panel houses the device’s wide-ranging connectivity inputs and
outputs.
The BLU MKII also features a dual-data output, which should be used for
optimum performance with selected Chord Electronics’ DACs.
When installing any cable, you must make sure that they securely click into
place, especially optical.
DRIVERS: If you intend to use BLU MKII to upscale digital audio via USB
the device is driverless with Mac OS X and Linux operating systems. Use with
Windows operating systems does, however, require a driver.
These can be found on the product page at: chordelectronics.co.uk/product
/blu-mk-2/
WARNING: Do not use any other power supply other than that supplied. Doing so will invalidate your warranty.
3.4 The remote control
A comprehensive remote control is supplied with BLU MKII. It can control
BLU MKII as well as other devices within the range. You will notice that the
top section of the remote control is dedicated to the operation of BLU MKII
and DAVE, our flagship digital to analogue converter. The buttons below the
playback controls are reserved to control the Choral series preamplifier,
Prima.
The supplied remote control connects to BLU MKII using infrared.
If the infra-red reciever on the front of BLU MKII is covered the remote
control will not function.
Please avoid placing objects in front of either device.
NOTE: The volume buttons shown on the BLU MKII remote will only control the volume on the Choral series preamplifier, Prima. They will not control the volume of DAVE. To see how to change the inputs of DAVE using this remote control please refer to the DAVE user manual.
NOTE: Please only insert AAA batteries into the IR remote control and observe the correct orientation as indicated within the remote control. Failure to do so could result in non-operation or battery leakage.
Setting up BLU MKII
4.1 Placement
Whilst the BLU MKII operates normally within a stack of Chord Electronics
Amusable stands along with units such as the DAVE and Etude, it is recommended
that you allow the device to breathe.
Allocating 10cm of space around it to convection-cool during operation is
advised. If possible, do not place the unit(s) inside a cabinet.
**** As the infra-red remote control requires a direct line of sight to the
viewing portal, please avoid placing objects in front of either device.
4.2 Connecting an input to BLU MKII & drivers
BLU MKII is not just an upscaling CD transport, it can also upscale digital
audio via USB or BNC.
In order for this to occur you must now connect the digital output of your
source to a digital input of BLU MKII. The two available inputs are
highlighted below.
It is not possible to select between inputs. If you wish to use two sources
you must make sure that they are both not operating at the same time.
Alternatively, do not connect them at the same time.
4.3 Connecting BLU MK II to DAVE
Using the supplied BNC cables, it is simple to connect the BLU MKII to the DAVE:
-
Turn the BLU MKII and DAVE off, along with any connected equipment
-
Locate the Dual BNC outputs on the rear of BLU MKII and plug both BNC cables into the sockets.
-
Locate a single pair of the BNC inputs on DAVE, either the right pair (1 and 2) or the left pair (3 and 4), and plug the BNC cables in. You must pay careful attention to make sure that you are connecting them in the same order. For example; top to top and bottom to bottom
-
Turn both BLU MKII and DAVE on, but not any other connected equipment.
-
If you have connected your dual data BNC‘s to BNC 1 or 2 on DAVE, use the buttons on DAVE to navigate forward within the menu and select BNC 1. Pause here for a few seconds until D BNC1 is displayed.
If you have connected your dual data BNC‘s to BNC 3 or 4 on DAVE, use the buttons on DAVE to navigate forward within the menu and select BNC 3. Pause here for a few seconds until D BNC3 is displayed. -
You can now turn on any additional connected equipment and commence playback.
*DAVE will only display Dual BNC when BLU MK II is transmitting
a 768kHz or 705.6kHz signal.
Therefore BLU MK II must be set to maximum up sampling which is denoted by the
white button colour.
4.4 Connecting BLU MK II to another DAC
Although the BLU MK II is optimised for use with Chord Electronics’ DACs to
take advantage of the full 768kHz upscaling, BLU MKII can be connected to any
third-party DAC to increase performance.
However, it should be noted that only a maximum of 384kHz up sampling can be
achieved.
To make a connection to a third-party DAC you must only the highlighted BNC
output.
Dual data BNC‘s or the BNC input cannot be used.
To do this follow these simple instructions;
- Turn the BLU MKII and your third-party device off, along with any connected equipment
- Locate the Dual BNC output on the rear of BLU MKII, highlighted below, and connect a BNC cable into the socket
- Locate the BNC input on your third-party device and connect the other end of the cable to it
- Turn on both BLU MKII and your third-party device and select the appropriate input
- Turn on any additional equipment and commence playback
NOTE: It is possible to use the digital AES outputs on BLU to connect it
to another DAC.
However, on their own, each AES output can only offer a maximum sample rate of
96kHz. Because of this BNC is recommended over an AES (XLR) connection.
**** It is recommended that you choose the highest resolution output of the BLU MKii for best performance. The graph below illustrates the highest possible sample rate for each connection:
4.5 Sample rate
BLU MKII allows you to select the best sample rate for your system.
To select a sample rate first locate the switch next to the USB input. Then
you must move its position according to the sample rate that you wish to
engage, as shown below.
For most uses, including that with DAVE, we recommend the maximum possible
level of Upsampling. This is denoted by the switch being in a downwards
position and must be achieved via dual data BNC.
POSITION – UP: Upsampling minimum eg. signal now 88.2 kHz
POSITION – MID: Upsampling medium eg. signal now 176k.4 kHz
POSITION DOWN: Upsampling maximum eg. signal now 705.6 kHz
4.6 Output sample rate settings
Please use the table shown below to determine your optimum sample rate
settings when using the BLU MKII output.
The maximum output sample rate will depend entirely on your source input
sample rate, this will be limited to 44.1 kHz input during CD playback.
Key
Improvement
No improvement
Not supported
How to navigate the menu
5.1 Display and basic navigation
If you do not wish to use the included remote control to control the
functions of BLU MKII, many of the basic functions can be accessed from the
top panel including; play, pause, stop and fast forward. These functions can
only control the CD transport functionality and not playback via the USB or
BNC inputs. Additionally, if you wish to reference the current play state of
the CD transport or to confirm that dual data mode is active for any of the
dual BNC connections, BLU MKII has a screen that can display this information.
Please reference the below chart to learn about BLU MKII‘s display.
- Track no.
- Play status
- Minutes
- Seconds
- Dual data indicator
5.2 Video mode and dither
The BLU MKII is a highly flexible standalone upscale that is not only
designed to be used with music, but with video, too.
You can playback video via a computer/laptop/server or a Blu-ray player to get
the best audio quality from video soundtracks.
When you are playing back video, via USB or BNC, you may notice that there is
now a delay between the action on screen and the resulting audio.
This is due to the fact that BLU MKII has enormous processing capabilities,
which can introduce an undesired latency.
To solve this, BLU MKII comes equipped with a ‘Video mode’;
Video filter off : This will resolve the full 1-million tap Upsampling
performance for all music and audio playback. It is not recommended for video
playback.
Video filter on: The tap-length is moderately reduced* to allow foa
latency reduction. This mode is recommended for video but not music playback.
*Video mode reduces the tap count to 666,666, taps for low latency (104mS) playback. Not advisable for general audio playback.
It should be noted that it is not possible to engage video mode during CD
playback and therefore the same switch will perform a different action. In
this respect you can choose to add dither, a form of noise added to audio to
increase the acuracy of digital audio, or not add dither.
Please reference the graph below to learn the switch options.
The switch to modify both video mode and dither is located next to the BNC
sockets:
During USB or Coax use:
POSITION – UP: Video mode off 1million taps
POSITION DOWN: Video mode on 666,666 taps
During CD playback:
POSITION – UP: Dither off 1million taps
POSITION DOWN: 16-bit dither on 1million taps
Special features
6.1 Special features
BLU MKII features a Class 2 Type-B USB input with galvanic isolation.
Galvanic isolation allows for greater sonic performance because the power
rails of the input are totally isolated from the data lines.
No special attention or cables are required to allow the BLU MK II to function
in this mode.
However, the usual USB +5V rail will need to be present.
The Pumphouse, Farleigh Lane, East Farleigh, Kent, ME16 9NB. Great Britain.
+44 (0) 1622 721 444
info@chordelectronics.co.uk
chordelectronics.co.uk
Made In BRITAIN
established 1989
References
- Chord Electronics - High-End Audio for Hi-Fi Enthusiasts & Professionals
- Chord Electronics - High-End Audio for Hi-Fi Enthusiasts & Professionals
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