Mustafa Kemal Mh. 2140 Cd. B Blok No: 17/3 Çankaya /ANKARA
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info@doğagrup.com.tr

The lectern provides the opportunity to train students on oratory to be used in lectures, teaching and conferences. It develops the confidence needed to speak to the community in terms of personal development. Since it can be recorded, it enables diction correction and enhancement by listening to the past records. It includes 4 sub woofers, a tweeter, internal microphone with 80W nominal output power and a small table lamp.

  • There should be an audio line input, two microphone inputs, a line output, and a recording output on the lectern.
  • Recording Output should support 1V / 0dB sound sensitivity. And quality control should have 1 0dB Bass level and 1 0dB Treble level of sound sensitivity.
  • The device must support UHF Wireless microphone.

MIXER AMPLIFIER

  • The audio output power of the mixer amplifier will be at least 80 watts.
  • The speaker output impedance of the mixer amplifier must be at least 4 ohms.
  • Mixer amplifier must have at least 2 channel microphones (2 mV).
  • The mixer amplifier must have at least 1 channel line (30 mV) input.
  • Mixer amplifier should also have master,bass and treble control.
  • In the mixer amplifier, the mix out must be 1 V and the sound sensitivity must be 0 Db.
  • The recording output of the mixer amplifier should be 1 V and the sound sensitivity should be 0 Db.
  • The mixer amplifier must have an MP 3 Player with USB input and Bluetooth.
  • The mixer amplifier should have an audio output and a control switch for 2 speakers with 8 ohm impedance.
  • The mixer amplifier must be able to record audio to flash memory and have a remote control.

GOOSE NECK MICROPHONE

  • The microphone should be goose neck with spiral light capacitive
  • It must be condenser and operate with power supply over XLR.
  • The frequency range should be 80 – 18 000 Hz.
  • Impedance should be at most 220 ohms
  • Sound pressure level should be at least 125db.
  • Sound sensitivity should be at least -60db (1mV).
  • Audio output must be 3 pin XLR male.
  • It must be at least 55 cm long.
  • It should work with +48 DC phantom power.
  • It must have a LED light to indicate that it is working.

WIRELESS MICROPHONE

  • The wireless microphone must operate in the dual frequency band.
  • Band A should be in the range of 650-665 Mhz; band B should be in the range of 666-681 Mhz.
  • The communication distance between the microphone and the amplifier should be at least 35 meters outdoors and 20 meters indoors.
  • The Wireless Microphone must be able to work with 3V DC, 2 AA batteries.

MP3 RECORDER AND PLAYER

  • There must be a USB Port.
  • Bluetooth Connection must be available.
  • All functions must be managed with the Remote Control.
  • It must have Stop / Play / Fast-forward / Rewind / Record Button.

LIGHTING LAMP

  • The lighting lamp should be gooseneck with spiral led.

SPEAKERS AND FILTER

  • Bass speaker
  • The loudspeaker should be a maximum of 4 ”and a maximum of 4.
  • Speaker impedance must be at least 16 ohms.
  • The operating frequency of the speaker should be at least 80 Hz – 10 kHz.
  • The maximum power of the speaker should be at least 20 W.
  • Treble speaker
  • The working frequency of the tweeter should be at least in the range of 1.5 kHz to 18 kHz.
  • The tweeter should be 1 ”with at least 1 neodymiumtreble speaker.
  • The power of the tweeter should be maximum 50 w.
  • Speaker Filter
  • The input frequency of the speaker filter should be at least in the range of 20 Hz – 18 kHz.
  • The bass output impedance of the speaker filter must be at least 90 Hz – 5 kHz.
  • The treble output frequency of the speaker filter must be in the range of at least 4 kHz to 18 kHz.
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