MIPRO ACT-51 Single-Channel Diversity Receiver

• EIA standard 1/2U rack-mountable metal chassis for personal use.
• All controls are intuitive and easily operating via electronic buttons, preventing accidental operation.
• Full-color VFD (vacuum fluorescent display) displays all pertinent parameters on the same screen. Automatic dim for stand-by and lit during performance.
• Each receiver presets 6 groups, and each group presets 8 interference-free channels. A total of 48 preset channels per band.
• Worldʼs first ACT™ function provides precise and rapid frequency sync to the transmitters.
• Advanced diversity receiving circuit for the best elimination of signal dropout and the "PiloTone & NoiseLock” dual-squelch circuits prevent noise interference.
• Three switchable output levels. Output level is accurately pre-adjusted to equal to the microphone capsule sensitivity and ensures optimal performance
• Receiver provides bias for booster where MIPRO antenna systems can be added for extended receiving range and stability
• Stable performance, easy installation and more non-interference channels ideal for stage and PA applications.

• The ACT-818 is a 1/2U single channel rack-mountable receiver with metal chassis.
• A full-color VFD (vacuum fluorescent display) provides clear viewing of all parameters. All controls are intuitive and easily accessible, allowing for quick and easy system setup via a single rotary control.
• Enhanced RF circuitry improves anti-interference characteristics and system compatibility with a 64 MHz-wide bandwidth, allowing more interference-free channels to be selected.
• New digital diversity receiving technology eliminates signal dropout and enhances receiving range.
• Full-range sound quality is not affected by the strength of RF signals or operating distance.
• Digitally-processed RF circuitry and DigitnamicPlus™ technology eliminates compander noise, assuring a wireless sound quality that easily rivals cable transmission.
• Improved proprietary Audio A/D Converter provides a true dynamic range of 115 dBA, T.H.D.
• AES3id Digital Audio Interface facilitates a direct connection to digital mixing consoles and transmits signal without distortion, ensuring a stable S/N ratio which will not deteriorate in long distance transmission.
• Proprietary 256-bit encryption provides secure audio transmission, preventing unauthorized listening.
• 10 built-in SmartEQ™ presets and user-defined microphone capsule equalization allows faithful sound reproduction to suit artistsʼ preferences.
• 10 built-in digital anti-feedback SmartEQ™ presets minimize feedback effectively without sacrificing sound quality.
• Optional MIPRO RCS2.Net software allows real-time network remote-controlling and monitoring of 64 systems.

Set composed of:

• 1 x LDWIN42R2
• 2 x LDWIN42BP
• 2 x LDWS100MH3

Due to the changed situation in the area of general frequency allocations for the operation of wireless systems starting in 2015, LD Systems decided to develop the even more flexible and highly professional WIN 42 wireless system.

With its outstanding audio quality, the LD Systems WIN 42 UHF system offers numerous potential applications for live performances and permanent installations. The working UHF frequency range is 734 MHz to 776 MHz. Both the handheld microphone and belt pack transmitter versions provide any vocalist, speaker or instrumentalist optimal transmission of his or her performance with the greatest possible freedom of movement. By means of a threaded connection, the microphone head of the handheld transmitter can be swapped quickly and easily (dynamic and condenser capsules).

The system has more than 1680 freely selectable frequencies and thus makes it possible to operate up to 20 systems simultaneously. The "channel scan" function assists you in finding and tuning to a transmission frequency without interference. This frequency is then transmitted simply and conveniently from receiver to transmitter via an infrared link. The transmitting power is adjustable in 3 stages (10, 30, 50 mW) directly on the microphone, permitting adaptation to any environment.

The rack True Diversity receiver houses numerous system features, for example, a transmitter battery status indicator on the receiver display, an indicator for the (transmitter) "Mute On/Off" function on the receiver display, 4 EQ presets that are switchable at the receiver, and much more. A highly professional system embodying the outstanding value-for-money that is so typical for LD Systems.

• UHF frequency range 734 - 776 MHz
• 1680 frequencies
• 20 groups with 577 fixed frequencies
• user bank with 1680 freely selectable frequencies in 25 kHz increments
• 255 addresses selectable
• channel scan
• true diversity receiver
• interchangeable microphone capsules (dynamic / condenser)

Receiver display

• volume
• radio frequency level antenna A/B
• audio level
• battery status of transmitter
• transmitter sync via infrared
• squelch setting in menu
• equalizer setting in menu
• naming template in menu
• 10 sets storable
• lockable menu
• balanced XLR output, unbalanced 6.3 mm jack
• adjustable output
• adjustable headphone output

• battery status
• RF power
• AF power
• additional system information

• Model Name: LDWIN42R
• Channels: 1680 (20 groups + 1 user group)
• Frequency range: 734 - 776 MHz
• Audio Frequency response: 60 Hz - 16 kHz
• THD:
• Signal/Noise ratio: >100 dB
• Audio Output: XLR balanced / 6,3 mm Jack unbalanced
• Power Supply: external power adapter 13,5 V DC, 500 mA
• Dimensions (W x H x D): 212 x 44 x 184 mm

• Model Name: LDWIN42MD
• Channels: 1680
• Frequency range: 734 - 776 MHz
• Audio Frequency response: 60 Hz - 16 kHz
• RF output power: adjustable 10 mw / 30 mw / 50 mw
• Power requirement: 2 x AA size batteries
• Operating time: >13 h with alkaline batteries
• Dimensions (L x Ø): 255 x 52 mm

• Model Name: LDWIN42BP
• Channels: 1680
• Frequency range: 734 - 776 MHz
• Audio Frequency response: 60 Hz - 16 kHz
• RF output power: adjustable 10 mw / 30 mw / 50 mw
• Input Connector: mini XLR 3-pole (phantom power for headset)
• Power requirement: 2 x AA size batteries
• Operating time: >14 h with alkaline batteries
• Dimensions (W x H x D): 87 x 25 x 63 mm

Technical Data
 RF frequency range  518..... 866 MHz 
 Transmission/receiving frequencies  1440 
 Presets  4 
 Switching bandwidth  36 MHz 
 Peak deviation  +/- 48 kHz 
 Compander  HDX 
 Frequency response (microphone)  40.....18000 Hz 
 Signal-to-noise ratio  > 110 dB(A) 
 THD, total harmonic distortion   In compliance with  ETS 300422 , ETS 300445 , CE , FCC 
 Antenna connector  2 BNC, 50 Ohm 
 Audio-XLR connector  6,3 mm 
 Audio output level (balanced)  XLR: +18 dBu max 
 Audio output level (unbalanced)  Jack: +12 dBu max
 Power supply  10,5 - 16 V DC battery AA (Mignon)
 Dimensions (Receiver)  212 x 145 x 38 mm 
 Weight (Receiver)  1100 g 
 RF output power  30 mW 
 Power supply  2x 1.5 V battery AA (Mignon)
 Operating time (transmitter)  > 8 h 
 Input voltage range  1,8 V line
 Input voltage range  2,4 V line
 Dimensions (Transmitter)  82 x 64 x 24 mm 
 Weight (Transmitter)  158 g