LAB GRUPPEN ACN3C 3WAY STEREO-4 and 5WAY MONO CROSSOVER

In an active loudspeaker system the crossover network is connected, in the signal path,
before the power amplifiers. An active crossover network feeds separate signals to the
bass, mid, and treble power amplifiers. The power amplifiers in turn power the corresponding
loudspeaker drivers for the bass, mid, and treble ranges.
This method has several advantages, especially in large PA systems, compared to passive
dividing where the crossover network is connected between the power amplifiers and the
loudspeakers. You get for example lower distortion, in particular distortion that is caused by
loud bass tones which intermodulate with the mid, and treble ranges. An active system also
eliminates the power losses, associated with passive crossover networks.

LAB.GRUPPEN's ACN C crossovers are designed around a four-pole state variable filters,
which are derived from the theory of analog computers. The most common way to alter
crossover frequencies in such a circuit is to turn a multiple ganged potentiometer. However
most potentiometers have bad tolerances (20 % or worse), and these tolerances affect the
accuracy of the crossover frequencies and the flatness of the summed output.
A better way of altering the crossover frequency is applied in the ACN 2/3C; namely the use
of "Digital Hexcode" switches. This allows the use of close tolerance components, which
result in a crossover frequency accuracy better than 1 %.
By careful selection of these components, an optimum density of available crossover frequencies
has been created, especially in the region between 800 Hz and 2 kHz. This has made it possible
to achieve a continuity of phase and of group delay time together with the speaker system. This
leads in turn to an improved intelligibility in the vocal region.
12, or 18 dB/octave slopes can be ordered as an option. The 24/octave slope has equal phase
at the crossover frequency region, in accordance with Linkwitz-Riley. To achieve flatness in the
summed output, the high and lowpass filters meet each other at 6 dB.
Each of the outputs of the ACN 2/3C have been equipped with shelving equalization, which gives
an adjustable bass boost of upto +12 dB, and a treble boost of upto +12 dB. In the ACN 3C the
mid output has an additional shelving boost, but that works at a lower corner frequency. With the
help of this equalization it is possible to align the frequency response of the speaker system. You
can, for example, compensate the roll-off in the treble of so-called "Constant Directivity“-type horns.
It also means you negate the need, for an external (graphic) equalizer, in several applications.

Key Features:

3-way stereo or 4- and 5-way mono
Switchable crossover frequencies:
32 frequencies between 80 Hz and 4.8 kHz
No dangerous "x10 switches" or frequency knobs on the front
The standard slope is 24 dB/octave. Optional: 12 and 18 dB/octave slopes
Switchable subsonic filters
Front panel gain controls
Mute switch on all outputs
Mono bass switch
Electronically balanced inputs with transformer option

The Soundweb London BLU-160 offers configurable I/O, configurable signal processing and a high bandwidth, fault tolerant digital audio bus.

The BLU-160 has open architecture which is fully configurable through HiQnet™ London Architect. A rich palette of processing and logic objects and a "drag and drop” method of configuration provide a simple and familiar design environment.

This processor features a low latency, fault tolerant digital audio bus of 256 channels which uses standard Category 5e cabling giving a distance of 100m between compatible devices. Fiber media converters can be used to increase the distance between devices to over 40km.

Four card slots which accommodate analog inputs, analog outputs, digital inputs and digital outputs in banks of four facilitate many different device I/O configurations.

Analog Input Cards provide software configurable gain in 6dB steps up to +48dB per channel and software selectable Phantom Power per channel. Digital Input Cards and Digital Output Cards process AES/EBU and/or S/PDIF audio and offer a variety of clocking and syncing options. (Further information about the I/O cards can be found on dedicated datasheets)

Phantom Power, Sync, Signal Present and Clip information per channel is easily accessible, without the requirement for a PC, from clear front panel LED indication. Device-specific information such as Device Name, Device Type, Firmware Version Number, Time, IP Address and Subnet Mask is available from the front panel display. A bi-directional locate function allows devices to be identified both from and within HiQnet London Architect.

12 Control Inputs and 6 Logic Outputs allow the BLU-160 to be integrated with GPIO compatible devices. The Soundweb London Interface Kit, comprehensive documentation which details how Soundweb London systems can be integrated with third party control systems, is included within the installation of HiQnet London Architect.

The BLU-160 and the other members of the Soundweb London family provide the building blocks of the perfectly tailored system solution.

• Four Input / Output Card Slots
• Configurable Inputs / Outputs
• Analog Inputs (with Phantom Power per Channel)
• Analog Outputs
• Digital Inputs (AES/EBU and S/PDIF)
• Digital Outputs (AES/EBU and S/PDIF)
• Configurable Signal Processing
• Rich Palette of Processing and Logic Objects
• 256 Channel, Low Latency, Fault Tolerant Digital Audio Bus
• Clear Front Panel LED Indication
• Informative Front Panel Display
• Bi-Directional Locate Functionality
• 12 Control Inputs and 6 Logic Outputs for GPIO Integration
• Soundweb London Interface Kit for Third Party Control System Integration (Documentation)
• HiQnet Device
• Configuration, Control and Monitoring from HiQnet London Architect

Based on a two-in, six-out topology, the DC-One is designed primarily for users of small-to-medium sized sound systems in both mobile and installed applications. While the unit is an all-new development based on a powerful SHARC processor, it is 100 percent compatible with all settings from other Electro-Voice signal processors. A large part of DC-Oneʼs development was aimed at ensuring that users can easily handle its serious digital horsepower and high-end audio performance. Free. PC-Editor software is available, or the DC-One can be operated via the front panel.   A/D Conversion    24-Bit Delta-Sigma
A/D Conversion    24-bit/sigma-delta (linear phase) 128 times oversampling
Analog Inputs    2 XLR (Electronically Balanced), 2 XLR THRU OUT (Electronically Balanced)
Analog Outputs    6 XLR (Electronically Balanced)
Control Protocol    Front Panel USB Connector
D/A Conversion    24-bit/sigma-delta 128 times oversampling
D/A Conversion    24-Bit Delta-Sigma
Data Format    24-Bit
Digital Inputs    1 XLR AES/EBU (2 Ch)
Dynamic Range    111 dB (unweighted, band limited 22 Hz - 22 kHz)
Electronics Type    Processor
FIR-Drive    No
Frequency Response    10 Hz - 22 kHz (±0.5 dB)
Input Impedance (Balanced)    10 kΩ
Internal Processing    32-Bit Floating Point
Mains Voltage    100-240 VAC
Maximum Input Voltage    8.7 V / +21 dBu (Without -6 dB Analog Pad Engaged)
Maximum Output Voltage    8.7 V / +21 dBu
Nominal Input Voltage    1.23 V / +4 dBu
Nominal Output Voltage    1.23 V / +4 dBu
Output Impedance (Balanced)    50 Ω
Power Consumption    25 W
Sample Rate    48 kHz
THD+N    < 0.01% (band limited 22 Hz - 22 kHz)
Height    1RU 44.45 mm (1.75“)
Width    482.6 mm (19“)
Depth    355.6 mm (14“)
Weight Net    4.6 kg (10.14 lbs) 

With 6 inputs and 4 outputs the dbx ZonePro? 640 and 641 provide flexible signal routing,
powerful DSP processing and multiple control interfaces for Commercial Audio applications.
Designed to offer superior system sonic performance and flexibility, the 640/641 deliver the
highest quality tools available. Even the input and outputs connectors were chosen for their
standard usage and reliability. The ZonePro products offer Euroblock connectors for balanced
signals and RCA connectors for interfacing with consumer equipment often used in commercial
applications; there is also a simple analog input buss that allows inputs to be sent from one
unit to the next for unit and job scalability. The 640 and 641 provide every necessary processing
tool, from the input processing like gain control and EQ available on all inputs to highly sophisticated
and specific functions such as selectable paging microphone processing including Gating,
De-Essing, Auto Gain Control, Compression and Feedback Suppression. The heart of the
ZonePro products is the Routing module that provides of course Primary Source Selection
but also Source Ducking for Paging and Priority Override. The outputs also offer a wealth of
processing designed for commercial applications like our patent-pending AutoWarmth? function
that was co-developed with JBL to provide natural low frequency extension at any signal level.
Each output also offers EQ, Bandpass and Crossover filters, Limiting and Delay for system
optimization. With the ZonePro? every tool is at your disposal to maximize the response of
your system.
Beyond processing, the ZonePro? products offer multiple forms of control to further extend the
versatility of your system. From easy-to-use wall panel Zone Controllers for standard end-user
functions like source select and volume control to advanced system control including a built-in
Real Time Clock that can provide programmable system changes throughout the day or week.
For system setup and monitoring the ZonePro Designer software provides an intuitive interface
and a speedy setup Wizard for configuring and editing all system parameters.

The ZonePro? 640 and 641 will take your Commercial Audio system to the next level with advanced
processing, versatility and control.

? Advanced Feedback Suppression (AFS?)
? Autowarmth?
? Auto Gain Control
? Compression
? Limiting
? Noise Gating
? Notch Filtering
? Bandpass and Crossover Filters
? Parametric EQ
? Security Lockout
? Wall Panel Control
? RS-232 Control
? Windows? 2000 and XP GUI
? IEC, UL and CSA Approvals

With 6 inputs and 4 outputs the dbx ZonePro? 640 and 641 provide flexible signal routing,
powerful DSP processing and multiple control interfaces for Commercial Audio applications.
Designed to offer superior system sonic performance and flexibility, the 640/641 deliver the
highest quality tools available. Even the input and outputs connectors were chosen for their
standard usage and reliability. The ZonePro products offer Euroblock connectors for balanced
signals and RCA connectors for interfacing with consumer equipment often used in commercial
applications; there is also a simple analog input buss that allows inputs to be sent from one
unit to the next for unit and job scalability. The 640 and 641 provide every necessary processing
tool, from the input processing like gain control and EQ available on all inputs to highly sophisticated
and specific functions such as selectable paging microphone processing including Gating,
De-Essing, Auto Gain Control, Compression and Feedback Suppression. The heart of the
ZonePro products is the Routing module that provides of course Primary Source Selection
but also Source Ducking for Paging and Priority Override. The outputs also offer a wealth of
processing designed for commercial applications like our patent-pending AutoWarmth? function
that was co-developed with JBL to provide natural low frequency extension at any signal level.
Each output also offers EQ, Bandpass and Crossover filters, Limiting and Delay for system
optimization. With the ZonePro? every tool is at your disposal to maximize the response of
your system.
Beyond processing, the ZonePro? products offer multiple forms of control to further extend the
versatility of your system. From easy-to-use wall panel Zone Controllers for standard end-user
functions like source select and volume control to advanced system control including a built-in
Real Time Clock that can provide programmable system changes throughout the day or week.
For system setup and monitoring the ZonePro Designer software provides an intuitive interface
and a speedy setup Wizard for configuring and editing all system parameters.

The ZonePro? 640 and 641 will take your Commercial Audio system to the next level with advanced
processing, versatility and control.

? Advanced Feedback Suppression (AFS?)
? Autowarmth?
? Auto Gain Control
? Compression
? Limiting
? Noise Gating
? Notch Filtering
? Bandpass and Crossover Filters
? Parametric EQ
? Security Lockout
? Wall Panel Control
? RS-232 Control
? Windows? 2000 and XP GUI
? IEC, UL and CSA Approvals