CU-300 Control Unit

The heart of the CS-300 Conference and Discussion System. Controls and powers delegate and chairman microphone units, as well as other audio input and output.

SKU: CU-300 Category:

The CU-300 Control Unit is the core of the ENERSOUND CS-300 Conference and Discussion System controlling chairman and delegate microphone units, as well as other audio inputs and outputs. It also supplies power for up to 50 delegate and chairman units.

The innovative ENERSOUND CS-300 Conference and Discussion System is equipped with a high-quality ECM capsule, intelligent automatic mixing technology and integrated acoustic and mechanical design, providing a turn-key solution and delivering consistently natural, clear audio performance in any environment. The CS-300 is ideal for discussions and meetings of up to 150 participants. Each CU-300 Control Unit can handle up to 50 contribution microphones and with a maximum of 3 CU-300 Control Units per system you can handle up to 150 contribution microphones.

With the Enersound CS-300 push to talk conference microphone system, each microphone is connected to the next one through the attached single cable. The last microphone is connected to the control unit to complete the loop. The control unit has an audio output that combines all of the microphones’ signals, eliminating the need of a multi-channel mixer and an operator to control the various microphones. Consequently, there is only one cable in the system that interconnects all the microphones. This makes the set-up easier, cleaner and eliminates unnecessary cables that may cause noise, failures and visual clutter. In addition, each unit has a button to activate/ deactivate the microphone, a lighted ring that lights up when the microphone is activated to give a visual indication that the mic is active, and a speaker to listen to the audio of the other contribution units and auxiliaries.

A CS-300 Conference and Discussion System consists of:
• (1) Control and power supply unit (CU)
• Maximum of (50) delegate or chairman microphone units
• Peripheral audio and/or telecommunication equipment

• Quick and easy installation
• Set up in a few minutes
• Portable and lightweight
• Single-cable run daisy chain connectivity
• Controls up to 150 delegate and chairman microphone units
• Provides power for up to 50 microphone units
• Intelligent automatic mixing technology
• Stand alone, plug and play operation
• Front panel LCD display and controls for simple configuration
• Audio IN/OUT RCA connections
• 3.5mm headphone connection
• Integrated speakers
• Teleconferencing interface (Analog RCA input & output)
• External XLR microphone input
• Recording input & output

• Operating voltage: 100-240 VAC, 50/60 Hz (auto-switching)
• Current consumption: MAX 0.9A (100VAC) 0.3A (240VAC)
• DC supply to contribution units: ±15V Line, Telephone Coupler and Insertion
• In/Outputs (Unbalanced)
 • Input sensitivity: -14dBV/+11dBV (nominal/maximum)
 • Input impedance: 33Kohm
 • Output level: -14dBV/+11dBV (nominal/maximum)
 • Output impedance: 500ohm
• Recorder In/Out (Unbalanced)
 • Input sensitivity: -20dBV/+5dBV (nominal/maximum)
 • Input impedance: 47Kohm (for L & R channel)
 • Adjustment: -20dBV/+5dBV
 • Output level: +0/-30dB
 • Output impedance: 500ohm
• External Microphone Input (Balanced)
 • Input sensitivity: -56dBV
 • Adjustment: +6dB/-6dB
 • Phantom Power: 12V+/-1V, 2 x 680ohm (+/-2%)
 • Output connection: 3.5mm stereo jack
• Headphone Output
 • Output level: -8dBV/+2dBV
 • Output Impedance: 22ohm
• Temperature range
 • Storage and transport: -4 to 131°F / -20 to 55°C
 • Operating temperature: 41 to 113°F / 5 to 45°C
• Ambient humidity
 • Storage and transport: 0% – 99% RH
 • Operational: 20% -95% RH
• Dimensions (HxWxD): 360 X 150 X 90 mm
• Weight: 2 lbs 11 oz / 1215 g

FCC statement:
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.

CS-300 Brochure
CS-300 Manual

Q: What are the differences among the Enersound push to talk conference microphone system, standard wired and wireless microphones?
A: Each standard wired microphone is connected directly into one channel of an audio mixer using a cable. For example, if 10 standard wired microphones are required, you will need to run 10 cables into a 10-channel mixer and have an operator opening and closing the microphones to avoid excessive noise and feedback for having all the mics opened. If you think this is complicated with 10 microphones, imagine having 50 or more mics.

Each standard wireless microphone is comprised of a wireless microphone transmitter, and a base receiver that is connected into one channel of an audio mixer using a cable. Going back to the same example above, if 10 wireless microphones are required, you will need 10 wireless microphone systems working in 10 different interference-free frequencies, a 10-channel mixer and an operator. The more wireless microphones you need, the better quality the microphones need to be and the greater chances of interference you have. The only benefit to the above wired microphones is the elimination of some cabling but the rest of the challenges still remain and a new challenge is posed that is the availability of interference-free frequencies.

With the Enersound CS-300 push to talk conference microphone system, each microphone is connected to the next one using the attached single cable and the last microphone is connected to the control unit. The control unit has an audio output that combines all of the microphones’ signals, eliminating the need of a multi-channel mixer and an operator to control the various microphones. Consequently, there is only one cable in the system that interconnects all the microphones. This makes the set-up easier, cleaner and eliminates unnecessary cables that can cause noise, failures and visual clutter. In addition, each microphone has a button to activate/ deactivate the microphone, a lighted ring that lights up when the microphone is activated to give a visual indication that the mic is active, and a speaker to listen to the audio of the other contribution units and auxiliaries.

Q: How many push to talk microphones can I have in the Enersound CS-300 conference microphone system?

A: The CS-300 Conference and Discussion System is ideal for discussions and meetings of up to 150 people. Each CU-300 Control Unit can handle up to 50 contribution microphones and with a maximum of 3 CU-300 Control Units per system you can handle up to 150 contribution microphones.