ReviewsHigh Frequency Tube

Presonus Bluetube DP V2 2-Channel Tube Mic Pre-Amp DP2+Mic+Shockmount+Headphones

... can connect to your laptop or computer). Uni-directional. Sensitivity: -27dB2dB(0dB=1V/Pa at1kHZ). Output impedance: 2000%(at 1kHz). Standard operating voltage: 3V. Operating voltage range: 1.5V-10V. Current consumption: less than 500uA. Voltage deduction characteristic: within 3dB at 2V. S/N ratio: More than 24dB.
Frequency Response: 30Hz - 20 KHz. Fixed Crossover Filter cutoff frequency: 40Hz---16 KHz. Load impedance: Greater or = to 1000 Ohms. Equivalent Noise level: Less than 18dB A (IEC581-5). Max. Input SPL: 126dB(THD.0% at 1kHZ). Electrical current: Greater than 4.8Ma. Microphone body net weight:320 Grams (0.7 Pounds). Microphone Max.diameter 44mm (1.73 inches). Microphone Length 217mm (8.54 inches). Microphone material: steel grille + Alluminum (handheld part). PCB Layout: Surface mount.

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Diaotec Mole Repellents Solar Powered Groundhog Repellent Vole Repellent Outdoor Sonic Spike Pest Control to Keep Rodents Away from Your Lawn and Garden

[SOLAR POWERED]Diaotec Solar Powered Mole Repeller is powered by a efficient solar panel, which ONLY REQUESTS 4 HOURS FOR FULL CHARGING under sunlight. When fully charged, the mole repellent maintain continuous 24hours/7days protection even when cloudy day..
[HIGH OPERATING FREQUENCY]Every 25 seconds ,Diaotec Solar Powered Mole Repeller emits vibration and buzz sounds LASTING 3 SECONDS. Such high frequency operating to rodents sound like their natural danger signals so cause them to avoid the area soon..
[LONG ALUMINUM TUBE]DIAOTEC MOLE REPELLER comes with 2pcs aluminum tubes, long spike allows you to leave enough long of spike above ground, for avoiding water enter into the tube when waterlogging. It also allows you to leave enough long of spike to plate into soil, for driving the moles hidden deeply away..
[CHEMICAL-FREE AND WATERPROOF] Diaotec Mole Repeller is safe for use around pets and children. No need chemicals, poison sprays or traps,with excellent waterproof design, suitable for all weather conditions..
[GREAT PROTECTION RANGE]Diaotec Solar Powered Mole Repeller protects your gardens and lawns from moles, voles, mice, rats and other burrowing animals around 7,500 sq.ft LONG ALUMINUM TUBE: DIAOTEC MOLE.

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HiFiGo LETSHUOER x GIZAUDIO Galileo Dual-Driver Hybrid in-Ear Monitor, 10mm Dynamic Driver + Balanced Armature Unit IEMs in-Ear Earphones (4.4mm Plug)

Precise & Reliable 3D Printed Acoustic Cavity Structure: The acoustic cavity structure of Galileo earphones is designed with high-precision 3D printing technology. The complex acoustic cavity is molded with resin materials simultaneously to achieve more accurate physical frequency division..
Synthetic resin panel from the starry sky: Galileo uses an ink-painted synthetic resin panel, with azure blue, dark brown, and silver-white complementing each other as if the Milky Way and stars are fixed in it. With the surface treatment of actinic resin, each earphone has a unique brilliance flow, which is as eye-catching as the twinkling stars..
10mm liquid silicone & Al-Mg Alloy Dynamic Driver + Sonion 2389 balanced armature + electronic independent dual-frequency crossover: In order to meet the pursuit of excellent sound performance, Galileo houses a 10mm liquid silicone + Al-Mg alloy dynamic driver unit and a Danish Sonion 2389 balanced armature driver unit as the core configuration. The pair is designed with an independent electronic frequency division and cavity for each driver unit. The tube ensures a precise sound phase and extremely low distortion in the outpu....

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Bazooka BT8024DVC BT Series 8-Inch 4-Ohm Dual Passive Tube

200-Watt Powered 10" Bass Tube10" Woofer With Treated Foam Surround built-In Class D Amplifier Delivers 200 Watts Rms At 4 Ohms (250 Watts Max).
Mounting Straps, Wire Harnesses And Hardware Included adjustable Low-Pass Filter (60-250 Hz)Preamp- And Speaker-Level Inputs optional Speaker-Level Outputs For Connecting A 2Nd Bass Tube.
Fuse: 20A X 1Frequency Response: 30-250 Hz sensitivity: 100.
10-inch bass tube with on-board 250-Watt, 2-channel amplifier.

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Dixie EMS Single Head Lightweight Stethoscope, Latex Free, for Doctors, Nurses, Students, Medical and Home Use - Black

...agnostics and evaluations it has excellent sound quality and transmission..
PRESSURE SENSITIVE SINGLE HEAD - Single head stethoscopes have a pressure-sensitive tunable head that functions as both a diaphragm and bell depending on the applied pressure. This tunable diaphragm allows for easy shift between high and low frequency sounds. To hear low-frequency sounds, you rest the chest piece lightly on the patient.
to hear high-frequency sounds, you apply firm contact pressure to the chest piece. Slim head fits easily under cuff for taking blood pressure..
ONE PIECE MOLDED TUBING - Eliminates the auditory interference that's common in other two tube stethoscopes. The latex-free two tubes in one design eliminates the rubbing noise that traditional double tube stethoscopes can create..
ANATOMICALLY DESIGNED - The specially designed headset is made to match the angle of the ear canal for a superior fit that avoids audio leak and minimizes ambient noise for better performance. The 22-inch length offers better sound volume and allows you to easily accommodate all patients from infants to adults..
COSPLAY AND ROLE PLAY - Heighten the fun and realism of your role play and cosplay activities by adding this functioning stethoscope to your outfit to take actual readin....

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FiiO FA9 Headphone Earphone Wired in-Ear High Resolution 6BA MMCX for Smartphones/PC/Tablet Black

【HIGH PERFORMANCE】The 6 Knowles BA drivers per ear, together with the carefully-designed 4-way crossover and low-frequency ultra-long sound tube,....
【More lifelike sound】The FA9 marks the first time FiiO has employed Knowles EJ balanced armature drivers, commonly used among high-end IEMs. FiiO....
【80.6mm ultra-long sound tube】The FA9 employs a specially-designed, ultra-long sound tube 80.6mm in length. The sound tube acts as a low-pass....
【3 sound adjustment switches, 8 possible sounds】The FA9’s use of electronic crossover technology allows you to tune the sound to exactly the way....
【REMOVABLE CABLE】Detachable MMCX design including a 3.5mm-terminated cable made of 8-strand monocrystalline silver-plated copper cable gives....

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BaoFeng Pofung GT-3TP Mark-III+Speaker Tri-Power 8/4/1W Two-Way Radio with Speaker Mic Included

GT-3TP Mark-III has High / Med / Low Power Settings Broad (Wide) / Narrowband (Narrow), High power / low power (5W / 1W), selectable. Selectable....
Frequency Range: 65-108 MHz (Only commercial FM radio reception), VHF: 136-174 MHz (Rx/TX), UHF: 400-520 MHz (Rx/TX)..
Note: Factory defaults frequency is 140-150/430-440MHz (8W Output), please reset the radio to reach 136-174/400-470MHz or program it to reach....
128 Channels 50 CTCSS and 104 DCS, Function Busy Channel Lock "BCLO", Function "VOX" (Voice Operated Transmission), "OFFSET" (frequency offset for....
Optimal SQL Setting, Optimal Modulation of TX/RX Power Tube, True 8W Output Power, Up to 11KM effective talking range. Extra speaker mic included.....

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Willsenton R300 Tube Amplifier 300B x2 Single-Ended Class A Integrated Amplifier Power Amplifier Headphones amp All in One

ONE YEAR WARRANTY, warranty service will be carried out in the United States. Willsenton R300B is an integrated Amplifier, it is a Power Amplifier too....
Pure hand-made, Point to point manual welding.Single-ended pure Class A tube Integrated amplifier.
The body of Willsenton R300B use classic blue piano paint..
Reasonable internal structure, with fever circuit, high frequency is clear and detailed, full frequency is full, low frequency dynamic is loose and....
Two 5U4G vacuum tubes are used for high-voltage rectification. 1pcs of 6SL7 and 2pcs of 6SN7 vacuum tubes are used for the voltage amplifier and....

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JoLida Audio JD202BRC Integrated Stereo Tube Amplifier Black

Factory add an Inductance transformer and Bipolar filter circuit to get the nicer sound for the MKIII.Come with a Tube Cage and VU meters..
Power Transformers: new imported 0.35, stack thickness 60MM (114-60)..
Output amplifier core: core 0.35 new imported thick high silicon (86-50)..
Some of Senior audiophile optimization the electric circuit,it is better at arom,intermediate frequency and bass..

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Display Digital Signal Frequency Counter PLJ 6LED H LED Signal Generator Cymometer Tester Frequency Measurement Modules Adjustable Module 0.1~1000MHz(Backlight Font red)

Test Accuracy: The frequency meter is designed with dual intermediate frequencies. The intermediate frequency value and the addition and subtraction mode can be preset separately without affecting each other, which can achieve high stability and high resolution. The tester has good sensitivity, better than 60mVPP.
Excellent Performance: The frequency reference uses a temperature compensated voltage controlled crystal oscillator. The display driver adopts LED display special chip, the digital tube has high brightness and less external interference.
Small and Convenient: This module is compact and exquisite in design, can be put into a pocket, does not occupy extra space, is convenient to carry, and has reliable performance, good visual effects, and low cost.
Convenient to Operate: The circuit of the frequency meter is simple, the design structure is reasonable, and the unique two key control method and precise time algorithm are used to make the operation simple and fast.
Multi Function: The circuit is simple, the structure is reasonable, double button control, and the operation is simple. Each setting is automatically saved, and the power is on.

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Kuuleyn Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit, 6J1 Audio Tube Headphone Amplifier, Compact Electronic DIY Kit DIY Parts (Static Bag)

【Funtion】Connect the 6J1 tube pre-amp between sound source and amplifier, it will effectively filter digital flavor, the music and human voice will be relatively good.
【Eight 470uf Capacitor Filter】Eight 470UF capacitor filter is very clean, excellent power system to no hum, filaments are powered with DC 12V and need to be connected in series in order to reduce noise.
【High Frequency And Low Proof】A coupling capacitor is an electrodeless electrolytic capacitor with high frequency and low proof.
【Easy To Use】Using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without a plug, just need to weld the power cord onto the circuit board.
【Can Yourself Assemble Them】This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier.

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