Reviews Very Low Frequency

Facmogu 2PCS Bass Subwoofer Speakers HiFi Full Range Woofer Loudspeaker 4 Ohm Anti-Magnetic Car Vehicle Audio Speakers for 2.0/2.1 Boom Box Satellites Speaker DIY (5 Inch)

  • Full Range Woofer Loudspeaker is a 5"/6"/8" set, 4 ohm speaker complete range of amplifier, subwoofer speakers with an amazing frequency and loudness range.
  • provides amazing sound from low to very high volumes ..
  • A full-range woofer consists of a single driver element or red voice coil group, in the shape of a radiating dome dust cap, which is acoustically active. In most speaker drivers, the construction of this dust cap is relatively acoustically inert. Comes in the form of a small cone, claimed to improve dispersion at higher frequencies..
  • Has good low frequency and high frequency response - leave lower frequencies for subwoofers or special cabinet designs to handle/boost low frequency boost. Full range with good sensitivity (low frequency) and a light voice coil (high frequency) - these speakers usually use stronger magnets than usual, which increases sensitivity which reduces power requirements at low frequencies as well as allowing for a lighter voice coil..
  • The core has a copper ring that reduces third harmonic distortion by eliminating the generation of induced currents in the pole pieces. Also allows to implement the system according to the configuration "Mid-Treble-Mid", "Low-Mid-Treble" or possibly "Twin Peaks". It is equipped with a paper me....
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KWD808-I Electric Acupuncture Stimulator Machine Output Patch Massager Care Acupuncture Stimulator Machine Massager Care 6 Output Patch 500-1000hpa

  • ▶【Electric Acupuncture Stimulator Machine】Adjustable frequency and intensity. Adjustable sensitivity probe point Locator. 6 outputs, plus 1 detection outlet..
  • ▶【Safe & Efficient Treatment】The device is very safe and efficient in treatment because of its output pulse. Waves featuring low voltage, low frequency and having the same frequency range as the body..
  • ▶【5 Types Pulse Waves】There are 5 types of pulse waves to be selected: Continuous wave, Dense-disperse wave, Intermittent wave, Ripple wave, Respiration wave..
  • ▶【Operating Output Protection】With the characteristics of low-pressure, low-frequency, bi-directional, Operating output protection device, particularly safe treatment..
  • ▶【Guarantee】This item will ship from USA,Your satisfaction is our ultimate goal. If there is any questions please feel free to contact with us, we will spare no effort to help you..
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MC14046BCP Phase Lock Loop (PLL) IC 1.9MHz 1 16-DIP (0.300\

  • ...gnal-input amplifier and a common comparator input..
  • Very low power consumption: 70 µW (typ.) at VCO, VCO inhibit control for ON-OFF keying and ultra-low standby power consumption fo = 10 kHz, VDD = 5 V, Source-follower output of VCO control input (Demod. output), 100% tested for quiescent current at 20 V.
  • Operating frequency range up to 1.4 MHz (typ.) at VDD = 10 V, RI = 5 k, High VCO linearity: 003c1% (typ.) at VDD = 10 V, 5-V, 10-V, and 15-V parametric ratings.
  • Low frequency drift: 0.04%/°C (typ.) at VDD = 10 V, Choice of two phase comparators: Exclusive-OR network (I) Edge-controlled memory network with phase-pulse output for lock indication (II), Zener diode to assist supply regulation, Standardized, symmetrical output characteristics, Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices".
  • A Versatile Building Block for Micropower Digital and Analog Applications, Example Applications: FM demodulator and modulator, Frequency synthesis and multiplication, Frequency discriminator, Data synchronization, Voltage-to-frequency conversion, Tone decoding, FSK - Modems, Signal conditioning,.
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1pcs/lot Brand CD4HC7046AE 74HC7046 DIP-16 Phase-Locked Loop

  • ...gnal-input amplifier and a common comparator input..
  • Very low power consumption: 70 µW (typ.) at VCO, VCO inhibit control for ON-OFF keying and ultra-low standby power consumption fo = 10 kHz, VDD = 5 V, Source-follower output of VCO control input (Demod. output), 100% tested for quiescent current at 20 V.
  • Operating frequency range up to 1.4 MHz (typ.) at VDD = 10 V, RI = 5 k, High VCO linearity: 003c1% (typ.) at VDD = 10 V, 5-V, 10-V, and 15-V parametric ratings.
  • Low frequency drift: 0.04%/°C (typ.) at VDD = 10 V, Choice of two phase comparators: Exclusive-OR network (I) Edge-controlled memory network with phase-pulse output for lock indication (II), Zener diode to assist supply regulation, Standardized, symmetrical output characteristics, Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices".
  • A Versatile Building Block for Micropower Digital and Analog Applications, Example Applications: FM demodulator and modulator, Frequency synthesis and multiplication, Frequency discriminator, Data synchronization, Voltage-to-frequency conversion, Tone decoding, FSK - Modems, Signal conditioning,.
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KWD808-I Stimulator Machine 50Hz Electric Acupuncture Stimulator Massager Machine 6 Channels Outputs Patch Massager Care Device 100-240V Pulse Electrotherapy Acupuncture Instrument

  • ✅【SPECIFICATIONS】Output pulse circuit: 6 outputs. Input power: .
  • The fuse is slow-blow at 0.5A. Output pulse frequency: 1.2Hz~55Hz, the error range is ±30% continuously adjustable. Output pulse width: 0.6±0.15ms. Power supply voltage scope: AC 110~240V, 50Hz.
  • DC 9V+5%, 9V-10%. Atmospheric pressure range: 500hpa to 1060 hpa. Size: 21.7cmx16.7cmx7.5cm, weight: 1390g..
  • ✅【ADJUSTABLE FREQUENCY INTENSITY】The frequency and intensity can be adjusted. Adjustable sensitivity probe point locator. 6 outputs, plus 1 detection socket..
  • ✅【5 KINDS OF PULSE WAVES】There are 5 kinds of pulse waves to choose from: continuous wave, dense dispersive wave, discontinuous wave, ripple wave, breathing wave, with a wide range of functions..
  • ✅【OPERATION OUTPUT PROTECTION】The device outputs pulses, and the treatment is very safe and efficient. A wave with low voltage, low frequency, and the same frequency range as the human body. It has the characteristics of low voltage, low frequency, two-way, etc. The operation output protection device is particularly safe to operate and safe to use..
  • ✅【PROFESSIONAL SERVICE】If you have any questions or if you receive unqualified or damaged products, please contact us timely and we will handle them immediat....
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Pair of 2 Brand New Beyma 8mi100 8 8 Ohm 1000 Watt Mi100 Series Pro Midrange Speakers with Edgewound Aluminium Voice Coil

  • Beyma 8MI100 8" midrange speaker handles a powerful 250 watts AES & 500 watts program power handling. Low harmonic distortion. Controlled dispersion....
  • 2" edgewound aluminium voice coil with polymide fiber glass former. Designed for high quality mid-frequency reproduction ..
  • Features a 2" voice coil & high efficiency of 98dB SPL. Light & stiff cone delivers clean very responsive mids. Very low distortion w/ controlled....
  • This low-mid frequency transducer offers three main points of interest: a good sensitivity (98 dB), a controlled dispersion up to 3 kHz and a low....
  • Furthermore, it is mounted with a cast aluminium basket that reduces mechanical vibrations and increases thermal dissipation. This fact, added to the....
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Sleep Aid Device, Hand-held Nighttime Sleep Aid Device, Micro-Current Intelligent Relieve Anxiety Depression Fast Sleep Instrument, Natural Sleep Aid Device, Physical Sleep Aids

  • ...rivation and insomnia fall asleep as soon as possible. At the same time, it has the function of relieving migraines, relieving anxiety and releasing stress.This sleep aids has Light weight,small size and easy portability,So it can be used in the office, home and business trips. USB charging is very convenient..
  • [Low Frequency Microcurrent ]Low-frequency pulse current microampere level, does not hurt the body's function, still helps sleep after discontinuing use, non-drug, no dependence, through the palm of the hand to pass current, avoiding the risk of direct stimulation of the brain current..
  • [Two Frequency Modes] Our sleep aids have two modes. Low frequency mode (sleep mode): low frequency for soothing and relieving anxiety frequency, held in the palm of your Left hand can accelerate to let you sleep peacefully. High frequency mode (excitement mode): high frequency for excitement and inspiration frequency, held in the palm of your Right hand can make you excited and energetic, work and study with more passion..
  • [Important Notes&Easy to operate] Our sleep aid automatically stops after 15 minutes of work,so you don't have to worry about the device being in working condition all the time.To make it work again please turn it off and on again.As each perso....
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Juried Engineering CD4046BE CD4046B CD4046 CMOS Micropower Phase-Locked Loop Breadboard-Friendly IC DIP-16 (Pack of 5)

  • ...gnal-input amplifier and a common comparator input..
  • Very low power consumption: 70 µW (typ.) at VCO, VCO inhibit control for ON-OFF keying and ultra-low standby power consumption fo = 10 kHz, VDD = 5 V, Source-follower output of VCO control input (Demod. output), 100% tested for quiescent current at 20 V.
  • Operating frequency range up to 1.4 MHz (typ.) at VDD = 10 V, RI = 5 k, High VCO linearity: 003c1% (typ.) at VDD = 10 V, 5-V, 10-V, and 15-V parametric ratings.
  • Low frequency drift: 0.04%/°C (typ.) at VDD = 10 V, Choice of two phase comparators: Exclusive-OR network (I) Edge-controlled memory network with phase-pulse output for lock indication (II), Zener diode to assist supply regulation, Standardized, symmetrical output characteristics, Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices".
  • A Versatile Building Block for Micropower Digital and Analog Applications, Example Applications: FM demodulator and modulator, Frequency synthesis and multiplication, Frequency discriminator, Data synchronization, Voltage-to-frequency conversion, Tone decoding, FSK - Modems, Signal conditioning,.
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Juried Engineering CD4046BE CD4046B CD4046 CMOS Micropower Phase-Locked Loop Breadboard-Friendly IC DIP-16 (Pack of 10)

  • ...gnal-input amplifier and a common comparator input..
  • Very low power consumption: 70 µW (typ.) at VCO, VCO inhibit control for ON-OFF keying and ultra-low standby power consumption fo = 10 kHz, VDD = 5 V, Source-follower output of VCO control input (Demod. output), 100% tested for quiescent current at 20 V.
  • Operating frequency range up to 1.4 MHz (typ.) at VDD = 10 V, RI = 5 k, High VCO linearity: 003c1% (typ.) at VDD = 10 V, 5-V, 10-V, and 15-V parametric ratings.
  • Low frequency drift: 0.04%/°C (typ.) at VDD = 10 V, Choice of two phase comparators: Exclusive-OR network (I) Edge-controlled memory network with phase-pulse output for lock indication (II), Zener diode to assist supply regulation, Standardized, symmetrical output characteristics, Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices".
  • A Versatile Building Block for Micropower Digital and Analog Applications, Example Applications: FM demodulator and modulator, Frequency synthesis and multiplication, Frequency discriminator, Data synchronization, Voltage-to-frequency conversion, Tone decoding, FSK - Modems, Signal conditioning,.
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DDARKHORSE TX12 Karaoke Pre-Effects KTV Professional Digital Audio Echo Effect Processor DSP Audio Processor with Bluetooth USB (TX12-110V)

  • Professional pre-amplifier adopts dual-mode reverb processing, which makes the vocal effect more abundant, natural and transparent. It is a high-fidelity smooth natural sweet style stereo dual reverb and multi-purpose karaoke effect. The output has front (rear) left and right channels, center channel, and subwoof frequency channel. And it is very simple and convenient to use like karaoke amplifier..
  • High-grade aluminum alloy panel is transported, 1U ultra-thin design, using karaoke adjustment to make debugging more convenient and easy.
  • This machine has Bluetooth audio input, optical fiber input, USB input.
  • LED display screen, four sets of output with spectrum jump..
  • The microphone is equipped with 6-band parameter equalization adjustment, the adjustment range is wider, the sound is more delicate and soft, and the original tone is not damaged, the single-band sound quality effect is improved, and the howling frequency is effectively processed..
  • Subwoof channel output design with crossover point and adjustable output gain.
  • Subwoof channel has a perfect anti-low-frequency self-excitation circuit, when entering the MIC, the low-frequency signal output port is automatically attenuated by half to prevent low-frequency howling and damage to the device.
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PRV AUDIO 4 Inch Midrange Speaker 4MR60-4, 60 Watts Program Power, 4 Ohm, 30 Watts RMS Power Pro Audio Loudspeaker (Single)

  • HANDLES IT ALL: The 4MR60-4 full range speaker delivers broad frequency coverage and flat midrange response that ensures vocals and instruments to deliver ideal sound..
  • EXTENDED FREQUENCY RESPONSE: The 4″ midrange speaker 4MR60-4 is a pro audio midrange with very high sensitivity and a smooth extended frequency response up to 8 kHz.
  • COMPACT: The small dimensions and high output make it very useful to use in compact line array systems as a transition between the mid bass and high frequency way..
  • DESIGNED FOR EFFICIENCY: Each material and component such as the woven fiber glass cone, large spider, and rubber surround is carefully chosen to ensure a great sound quality and low distortion, it even operates at high power..
  • UPGRADE TODAY, HEAR THE DIFFERENCE: The 4MR60-4 even operates at high power. It is also applicable in home theaters, satellites, and surround speakers as well as in car audio when you are limited in space and require extended frequency response..
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7.83HZ Pulse Generator 5V 0.1A Schumann Wave Ultra-low Frequency Audio Resonator for Helping Sleep

  • ✔ MINI USB PORT POWER SUPPLY -- Adopted of Mini Usb port power supply, typically+5V 0.1A,and comes with USB cable.
  • ✔ LOW STATIC CONSUMPTION -- Imported ultra-low static power consumption main control IC,to make the waveform more stable.
  • ✔ 7.83HZ PULSE SQUARE WAVE -- Output 7.83HZ pulse square wave, whose duty cycle is 50%. Frequency can be fine-tuned for correction.
  • ✔ ULTRA-LOW SCHUMANN WAVE -- This product is Schumann wave 7.83HZ very low frequency generator, features high accuracy and stability.
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Rockville Apm10b 10' 400W Powered/Active Studio Subwoofer Pro Reference Sub

  • ...ality and eliminates unwanted distortions. Computer Optimized Electronic Crossover Network filters out Highs and Mids. Front-Firing Port Shaped and Designed by Sound Engineers to Reduce Port Turbulence and Deliver Distortion Free Top Sound Quality!.
  • Specially Wound Voice Coils Produce Accurate Response along the Low Frequency Spectrum. Distortion-Free Playback Even at Max Volume Listening! Very Clean Sound! Transducer Production Line to Make the SPL Performance Stable. Shiny metal mesh grill.
  • Crossover Frequency Control allows you to adjust low frequency input: 50Hz – 150Hz. ¼” TRS input jack. Left and Right XLR input/outputs. RCA input/outputs. Woofer Impedance: 8 Ohm. Frequency Response: 34Hz - 150 KHz. 10" woofer with rubber surround and paper cone with painted.
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