LD Systems U306 IEM HP In-Ear Monitoring System with Earphones – 655 – 679 MHz
We have developed the wireless U300® in-ear monitoring systems for unlimited freedom of movement on the stage with perfect in-ear monitor sound at all times. Developed in Germany, their clear, modern design and straightforward operation make them the perfect choice – not just for beginners. Their reliable range of up to 100 m and their low-reaching frequency band of 50 Hz to 16 kHz ensure professional performance. U300® in-ear sets are available for operation in 5 frequency bands: 584 MHz – 608 MHz, 655 MHz – 679 MHz, 823 MHz – 832 MHz+ 863 MHz – 865 MHz, 470 MHz – 490 MHz or 514 MHz – 542 MHz. Six systems can be used simultaneously in each case.
The U300® in-ear transmitters offer a choice of 12 transmission channels and an RF transmission power of 10 mW. They can also be operated in mono or stereo mode. Combo sockets serve as symmetrical XLR and asymmetrical 6.35 mm jack inputs. Left and right input levels can be controlled separately, while two LED chains indicate audio signal strength.
The U300® bodypack receiver has a mini jack socket to connect the earphones as well as displays for channel, stereo mode and low battery status. Running on two AA batteries, it has an operating time of 10 hours. A practical controller allows individual adjustment of the monitoring volume during performance. 19″ rack
Reliable wireless transmission with a range of up to 100 m
Low-reaching frequency response
12 selectable channels
Choice of stereo or mono mode
Up to 6 systems can be used simultaneously
10-hour bodypack operating time with two AA batteries
Unlimited number of bodypacks can be set to the same transmission frequency
Channel and RF reception displayed on bodypack
Transmitter in rugged metal casing with stereo level display
Removable antenna with BNC connection
19” rack assembly kit included.
Earphones included
Content
LD Systems U306 IEM HP In-Ear Monitoring System with Earphones - 655 - 679 MHz
We have developed the wireless U300® in-ear monitoring systems for unlimited freedom of movement on the stage with perfect in-ear monitor sound at all times. Developed in Germany, their clear, modern design and straightforward operation make them the perfect choice – not just for beginners. Their reliable range of up to 100 m and their low-reaching frequency band of 50 Hz to 16 kHz ensure professional performance. U300® in-ear sets are available for operation in 5 frequency bands: 584 MHz - 608 MHz, 655 MHz - 679 MHz, 823 MHz - 832 MHz+ 863 MHz - 865 MHz, 470 MHz - 490 MHz or 514 MHz - 542 MHz. Six systems can be used simultaneously in each case.
The U300® in-ear transmitters offer a choice of 12 transmission channels and an RF transmission power of 10 mW. They can also be operated in mono or stereo mode. Combo sockets serve as symmetrical XLR and asymmetrical 6.35 mm jack inputs. Left and right input levels can be controlled separately, while two LED chains indicate audio signal strength.
The U300® bodypack receiver has a mini jack socket to connect the earphones as well as displays for channel, stereo mode and low battery status. Running on two AA batteries, it has an operating time of 10 hours. A practical controller allows individual adjustment of the monitoring volume during performance. 19" rack
Transmission frequency Max. 1680 frequencies, adjustable in 25 kHz steps, 20 frequency banks, each with up to 16 factory-preset channels, no intermodulation, 6 frequency banks with up to 16 programmable channels
AF frequency response 25 Hz to 15 kHz
Temperature Range -10 °C to +55 °C
Frequency stability ±10 ppm
Antenna Output BNC socket, 50 Ω
EK IEM G4
Dimensions Approx. 82 x 64 x 24 mm
Compander Sennheiser HDX
THD, total harmonic distortion ≤ 0.9 %
Weight (incl. batteries) approx. 125 g
Signal-to-noise ratio approx. 90 dBA
Switching bandwidth up to 42 MHz
Peak deviation ±48 kHz
Nominal deviation ±24 kHz
Operating time approx. 4 to 6 hours (depending on volume level)
Modulation Wideband FM
Power supply 2 AA batteries, 1.5 V or BA 2015 accupack
Current consumption at nominal voltage: approx. 140 mA
with transmitter switched off: ≤ 25 µA
Adjacent channel rejection Typically ≥ 65 dB
Audio-Output-Power 2 x 100 mW at 32 Ω
Intermodulation attenuation Typically ≥ 70 dB
Limiter –18 dB to –6 dB, adjustable in steps of 6 dB, can be switched off
Powering 3 V battery / 2.4 V rechargeable battery
Receiving frequency Max. 1680 frequencies, adjustable in 25 kHz steps 20 frequency banks, each with up to 16 factory-preset channels, no intermodulation 6 frequency banks with up to 16 programmable channels
Audio-Technica's advanced M3 IEM system offers a full range of professional in-ear monitoring features, with a choice of 1321 UHF channels and easy-to-read LCD information displays on both transmitter and receiver for setting preferences. The stereo monitor system is equipped with Audio-Technica's versatile Personal Mix Control, which gives allows volume and mix control of two independent signals on stage, via controls on the M3R stereo body-pack receiver. While up to 16 complete M3 systems may be used simultaneously, any number of M3R stereo receivers can operate on the same frequency with a single M3T stereo transmitter. The M3T Stereo Transmitter is equipped with two XLR/¼" combo input connectors into which users can connect line-level inputs (from a mixing console, for example). The M3T also offers a headphone output that allows you to monitor transmitter input signals directly.
M3 Components
EP3 Headphones
In-ear dynamic headphones offer high-fidelity sound and excellent isolation
M3T Stereo Transmitter
Wireless UHF transmitter (frequency-agile) offers LCD display and 1321 user-selectable frequencies
M3R Stereo Receiver
Personal Mix Control in a lightweight body-pack with backlit LCD display
High-fidelity sound with clean, articulate mix allows performers to hear themselves clearly at lower volume
1321 selectable UHF channels with automatic frequency scanning
Up to 16 simultaneous systems per frequency band
Three receiver modes: Personal Mix, stereo, and mono
Personal Mix Control allows volume and mix control of two independent signals at the receiver
LCD information display offers step-through menus for setting preferences
XLR loop output (true pass-through) connects signal to mixing console, additional IEM system or recording device with no signal degradation
Adjustable squelch eliminates annoying static
Pilot tone protects against RF interference when transmitter is turned off
Multi-level limiter (defeatable) helps protect hearing from sudden peaks
Portable system is quick to load and set up
Reduces on-stage audio clutter for better overall mix & less feedback
Use any number of Stereo Receivers (with individual mixes) on the same frequency
Audio-Technica earphones with proprietary dynamic drivers offer full frequency response and outstanding isolation
Personal fit with 3 sizes of rubber eartips plus an ear-conforming foam tip
Selectable auxiliary input offers connection point for ambient microphone, click track, or other mic- or line-level input
Overall Specifications
Operating Frequencies: Band E: 790.000 to 822.000 MHz, 1281 frequencies
Band F: 832.000 to 865.000 MHz, 1282 frequencies
Band L: 575.000 to 608.000 MHz, 1321 frequencies
Band M: 614.000 to 647.000 MHz, 1321 frequencies Not all frequency bands available in all areas. Please check with local regulations.
Minimum Frequency Step: 25 kHz
Modulation Mode: FM stereo
Maximum Deviation: ±40 kHz
Dynamic Range: 90 dB (typical), A-weighted
Total Harmonic Distortion:
LD Systems U506 IEM In-Ear Monitoring System 655 - 679 MHz
Product typeTypeTransmission frequency rangeWeightProduct typeTypeChannelsModes of operationTransmission methodRated HF output powerFrequency responseSignal-to-noise ratioTotal Harmonic Distortion (THD)Dynamic rangeAntenna connectorInputsControlsInput connectorsInput impedance (kOhms)IndicatorsOperating voltageWidthHeightDepthWeightAccessories (included) Receivers
3.5 mm TRS
33 mW @ 16 Ohm mW , 80 mW @ 33 Ohm mW
Fixed to housing
Down , On / Off , Up , volume
RF (LED)
2 x 1.5 V AA
64 mm
100 mm
24 mm
0,095 kg
2 x AA batteries , Antenna
battery status LED
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