BlastKing ULTRAMIX 1502-EQ User manual

1
blastking.com
ULTRAMIX
1502-EQ
USER MANUAL
DUAL 15 - BAND GRAPHIC EQUALIZER
blastking.com

2
Thank you for the purchase of your BLASTKING ULTRAMIX Series Equalizer.
We know you have a world full of choices and we thank you for selecting us.
Please read this entire user manual before operating this unit
CAUTIONS
• All operating instructions should be read before using this equipment.
• To reduce risk of electrical shock, do not open the unit. There are NO USER OR SERVICEABLE PARTS INSIDE. Please refer servicing to a qualified service
technician. Opening the unit without the manufacturer authorization will void the warranty.
• Do not expose this unit to direct sunlight or a heat source such as a radiator or stove.
• Dust, dirt and debris can interfere with the performance of this unit. Make an effort to keep this unit away from dusty, dirty environments, and cover the unit when
it is not in use. Dust it regularly with a soft clean brush.
• DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.
• DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY CONTROLS OR SWITCHES.
BlastKing® products purchased in the USA are protected under the regular manufacturer’s warranty. The Ultramix series comes with a 2 year warranty.
This warranty is intended to protect customers from any and all manufacturer defects from two years of purchase.
The product will be replaced or repaired at the manufacturer’s discretion upon receipt of the warranted unit along with a dated proof of purchase from an authorized
dealer or distributor. This warranty becomes null and void under situations including but not limited to misusage, normal wear and tear, shipping damage and abuse.
For international purchases, please contact your local dealer or sales associate for further warranty information.
FCC STATEMENT
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 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 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 technician for help.
For warranty please register this product online at
http://blastking.com/product-registration/
This manual does not contain all the information about the design, production and changes of the equipment, and does not cover all the conditions that may occur
during installation, use and maintenance.
The information provided in this manual is accurate at the time of delivery. It may have changed due to product updates.

3
blastking.com
FEATURES
• 4 LED Output Levels
• Switchable Boost/Cut Ranges of ± 6 or ± 12dB
• Front Panel Bypass Switch
• 12dB Per Octave 50Hz Low-Cut Filters
• 12dB/ + 12dB Input Gain
• RF Filtered, Electronically Balanced Inputs
• RF Filtered, Impedance Balanced Outputs
• XLR and 1/4” TRS Connectors
• Dynamic Range 108db
FRONT PANEL
This control sets the signal level to the equalizer. It is capable of
-12 dB to +12 dB of gain. Its effect is apparent by viewing the
OUTPUT LEVEL BAR GRAPH.
1INPUT GAIN CONTROL
This switch removes the graphic equalizer section from the signal
path. The BYPASS switch does not, however, affect the INPUT GAIN,
or LOW CUT filters.
2EQ BYPASS
This switch selects which of the two boost/cut ranges the equalizer
will use, either ±6 dB or ±12 dB. The red LED lights when the ±12
dB range is selected.
3BOOST/CUT RANGE SELECTION SWITCH
This LED lights whenever any internal signal level reaches 3 dB
below clipping which may occur when any of the following happen:
1) the input signal is “hotter” than +18 dBu, 2) excessive gain is
applied by the input gain control, or 3) excessive boost is applied
using the frequency sliders.
4CLIP LED
Each one of these slider potentiometers will boost or cut at its noted
frequency by ±6 dB or ±12 dB, depending upon the position of the
BOOST/CUT RANGE switch. When all the sliders are in the center
detented position the output of the equalizer is flat. The frequency
band centers are marked at 2/3rds of an octave intervals on ISO
standard spacings.
6FREQUENCY BAND SLIDER CONTROLS
These four LEDs indicate output level of the equalizer. The red LED
is 3 dB below clip-ping and is marked as +18 dBu. It monitors the
level at the output of the equalizer after all other processing.
5OUTPUT LEVEL BAR GRAPH
The LOW-CUT switch inserts or removes the 12 dB per octave 50
Hz low-cut filter from the signal path. When the LOW-CUT switch is
pushed in, the LOW-CUT filter is IN the audio path.
7LOW CUT ENABLE SWITCH
16
5
3
2
4
7

4
BACK PANEL
CONNECTING THE EQ TO YOUR SYSTEM
The ULTRAMIX1502-EQ Equalizer has balanced inputs and impedance balanced outputs that can be used with any balanced or unbalanced line-level device.
To connect the equalizer to your sound system refer to the following steps:
• Turn off all equipment before making connections.
• Mount equalizer in a standard-width rack.
Install the EQ in a rack with the rack screws provided. It can be mounted above or below anything that does not generate excessive heat. Ambient temperatures
should not exceed 113° F (45°C) when equipment is in use. Although the unit’s chassis is shielded against radio frequency and electromagnetic interference,
extremely high fields of RF and EMI should be avoided.
• Make audio connections via XLR or 1/4” TRS jacks (according to application needs).
Both types of connectors for the inputs and outputs can be used for balanced or unbalanced connections. The use of more than one connector at a time for the
inputs could unbalance balanced lines, cause phase cancellation, short a conduc-tor to ground, or cause damage to other equipment connected to the equalizer.
More than one output may be used simultaneously as long as the combined paral-lel load is greater than 2 kΩ.
• Select the operating range with the Boost/Cut range selection switch.
NOTE: Be sure to reduce audio levels at the power amplifiers when changing the setting of this switch as it may generate an audible transient.
• Apply power to the equalizer.
Connect the AC power cord to the AC power receptacle on the back of the equalizer. Route the AC power cord to a convenient power outlet away from audio lines.
Since the ULTRAMIX1502-EQ equalizer consumes a relatively small amount of power, the unit may be left on continuously.
Connects AC power to the equalizer.
8POWER CORD RECEPTACLE
8
9
10 11
9110-220VAC SWITCH
Two types of output connectors are provided for output connections:
male XLR type connectors, and 1/4” tip-ring-sleeve phone jack
connectors.
10 OUTPUT CONNECTORS
Two types of input connectors are provided for input connections:
female locking XLR type connectors, and 1/4” tip-ring-sleeve phone
jack connectors. The maximum input level that the equalizer can
accept is typically +22 dBu (ref: 0.775Vrms).
11 INPUT CONNECTORS

5
blastking.com
INSTALLATION CONSIDERATIONS
Hookups and Cabling: The ULTRAMIX1502-EQ equalizer is designed for nominal +4 dBu levels. The equalizer can be used with either balanced or unbalanced
sources, and the out-puts can be used with either balanced or unbalanced loads, provided the proper cabling is used.
A balanced line is defined as two-conductor shielded cable with the two center conduc-tors carrying the same signal but of opposite polarity when referenced to
ground. An unbalanced line is generally a single-conductor shielded cable with the center conductor carrying the signal and the shield at ground potential.
Input Cable Configurations: The equalizer has an input impedance of 40 kΩ balanced and 20 kΩ unbalanced. This makes the ULTRAMIX1502-EQ equalizer’ audio
inputs suitable for use with virtually any low source impedance (under 2 kΩ).
Output Cable Configurations: The equalizer’s output is capable of driving down to a 2 kΩ load to at least +21 dBu. For maximum hum rejection with a balanced
source, avoid common grounding at the equalizer’s inputs and outputs. Most balanced (3-con-ductor) cables have the shield connected at both ends. This can
result in ground loops which cause hum. If hum persists try disconnecting the shield on one or more of the cables in the system, preferably at the input of a device,
not at the output.
OPERATION AND APPLICATION NOTES
The ULTRAMIX1502-EQ equalizer is a useful audio signal processing tool in situations where precise frequency control is required across the audible frequency
spectrum.
When used with an audio spectrum analyzer the EQ can tune any acoustical environment from the studio to the concert hall to stop ringing, increase clarity, and
tailor the overall frequency response of the environment. A real-time spectrum analyzer or other types of audio environment analyzers are very useful in determining
the amount of equalization needed.
Insert the graphic equalizer between the signal source (usually a mixer) and the power amplifiers (or the crossover if there is one). Adjust the level and equalization
as required to yield the desired system response.
For optimum signal-to-noise response, the gain structure of the sound system must be properly set up. Each component of the sound system should be set at its
nominal oper-ating level, starting with the first element in the system, usually a mixing console. Each element should be run at its nominal operating level in order to
take advantage of the maximum signal-to-noise properties of that element. Loudspeaker amplifiers, as the last element in the chain, should be set only as loud as
necessary, in order to avoid inducing unnecessary noise into the system.

6
SPECIFICATIONS
ULTRAMIX 1502-EQ
Inputs
Connectors: 1/4" TRS, female XLR (pin 2 hot)
Type: Electronically balanced/unbalanced, RF filtered
Impedance: Balanced 40 kΩ, unbalanced 20 kΩ
Max Input Level: >+21 dBu balanced or unbalanced
CMRR: >40 dB, typically >55 dB at 1 kHz
Outputs
Connectors: 1/4" TRS, male XLR (pin 2 hot)
Type: Impedance-balanced/unbalanced, RF filtered
Impedance: Balanced 100 Ω, unbalanced 50 Ω
Max Output Level: >+21 dBu balanced/unbalanced into 2 kΩ or greater
>+18 dBm balanced/unbalanced (into 600 Ω)
System Performance
Bandwidth: 20 Hz to 20 kHz, +0.5/-1 dB
Frequency Response: <10 Hz to >50 kHz, +0.5/-3 dB
Dynamic Range: Typically >112 dB
Signal-to-Noise: Typically >95 dB
THD+Noise: <0.003%
Interchannel Crosstalk: <-90 dB, 20 Hz to 20 kHz
Function Switches
EQ Bypass: Bypasses the graphic equalizer section in the signal path
Low Cut: Activates the 50 Hz 12 dB/octave high-pass filter
Range: Selects either +/- 6 dB or +/- 12 dB slider boost/cut range
Power Supply
Operating Voltage: 100 - 240 VAC, 50/60 Hz
Power Consumption: 15 W
Mains Connection: IEC receptacle
Physical Dimensions
Weight 5.5 lbs (2.5 Kg)
Dimensions (LxHxD) 19” x 1.75” x 6” (482.6 x 44.5 x 152.4 mm)

blastking.com
2980 NW 74th Ave.
Miami, FL 33122
Phone: [phone]