Supplier: Used mobile phone, used laptop, note book, ipad, pad, consumer electronics, speaker, headset. used cell phone
Services: International trade, wholesale, direct factory connecting, forwarding
Buyer: Used mobile phone, used laptop, note book, ipad, pad, consumer electronics, speaker, headset. used cell phone
Supplier: Electronics, mobile phones
Buyer: Routers, laptops, monitor, keyboard, cameras, headphone
New Mini LED Light Portable Wireless Speaker IPX5 waterproof Bluetooth Speaker strong bass Zealot speaker S53 Main Features: 1.Bluetooth music player 2.Support TF card 3.3.5mm stereo jack can connect Audio player 4.Portable, easy to carry 5.Good touch feeling 6.Colorful LED lighting Parameter: Bluetooth version: 5.0 Charge voltage:DC5V/1A Speaker:4 10w 57mm Transmission distance:10M Frequency response: 20Hz-20KHz Outpower: 10W S/N: 90dB Working voltage:3.7V Distorsion:1% Talking time:5H Music time:4H Standby time:>90days Charge time:2h Battery capactiy:3000mA
Classic Design Home Professional Indoor Outdoor Portable RGB tws mini Speaker Box with Microphone 1. It is a Portable Outdoor Mini Bluetooth Speaker. It is small, light, waterproof but with powerfull bass. It is a backpack speaker, a bicycle speaker. And the most amazing thing is it is a magnetic speaker. 2. Magnetic Bluetooth Speaker: The base of this Portable outdoor mini speaker comes with 4 super strong magnets. It can be attached to the iron-coataining object, and can be placed at will, play with idea and creat your interesting life. 3. Portable Small Bluetooth Speaker: Light and compact. Small and convenient to carry. 4. Bicycle Speaker: The speaker comes with a silicone carrying handle, you can easily hang it on the handlebars of the bike. 5. Small But Powerful Speaker: It come with 6W powerfull loadspeaker unit. The special passive radiator edge around the speaker unit create powerful bass. 6. 360 full-range sound effects, satisfy your picky ears: Professional-grade branded loudspeaker with clear and dynamic sound,superb overall balance, full bass and loud treble. 7. IPX4 Waterproof: Carry it to anywhere anytime you want. You don't need to worry about raining or splashing
Google Home Smart Speaker
Here are the specifications of the new version: * The program works with the Audio Analyser ATB 701 * The program includes the comfortable ATB 701QC program * Setting of the definition without script, there is no need of learning to program * Tolerance field is easy to set automatically or with the mouse * Rub&Buss is tested with the signal 13 to get a nonlinear distortion measurement * Surrounded noise does not disturb the Rub&Buss measurement because of the Q-Index calculation Measurement functions 1. Total Harmonic Distortion THD 2. Intermodulation Distortion, IMD 3. Frequency response(SPL) 4. Impedance(IMP) 5. Polarity Test 6. Thiele-Small Parameter 7. Phase 8. Step response 9. Quality Control Program Thiele-Small Parameter Frequency response of phase Intermodulation Distortion IMD Total Harmonic Distortion THD Quality Control Program Rub&Buss measurement Passed Rub&Buss measurement Failed 1. Frequency response The frequency response is tested with the M-PN signal. The measurement with this periodic noise gives the highest accuracy. The tolerance mask can be set automatically or manually. 2. Rub&Buss measurement The Rub&Buss is tested with the signal 13. The signal 13 consists of two sine-sweeps with the frequency ratio of 1 : 1.3. This signal is showing all resonances of the unit under test. For the passed and failed decision the Q-Index is calculated. The index is calculated from all frequencies higher than the second frequency of the test signal 13. The account is set into proportion to the amplitude of the test signal. The best speaker has the highest Q-index. The Rub&Buss measurement has following tests. Calculation of error 1. THD, K2,K10 The test is for the controlling of the placement of the voice coil. 2. IMD The test is for the controlling the gluing, loose particle and if there are cone touching of connection wires. 3. Frequencies > K5 The test is for the controlling of voice coil rubbing the magnet. 3. Distortion THD Test The THD test tests the harmonic distortion. The test signal is a sine wave with frequency to select. Because this test is included in the Rub&Buss test it is only for the special demand of the manufacturer. In the definition there is to set the maximum THD and the frequency. 4. Polarity Test The polarity test is for testing the wiring. It is for speakers, headphones and microphones. The test signal is a half sine wave. In the time response the program calculates if the positive or negative amplitude is the greatest value.
Brand Name:SIVITE/OEM Model Number:KA-302 Type:Professional Amplifier Channels:2 (2.0) Place of Origin:China Product Name:Medium-sized Amplifier Function:BT/USB/SD/FM Size:95*300*260mm Output power(RMS):35W + 35W 4 �© MIC:2 MIC input Power:AC220V / DC 12V input Package:6pcs/ctn Turnover Box Weight:22.5KG
A Valve Pre-Amplifier to meet the highest standards. Inside, the 4x12AX7 and 3x12AU7 valves provide the perfect pre-amplification for weak signals. The circuitry with its negative feedback design is the optimum of linearity and sound. Gold-plated high-grade Neutrik XLR input and output connectors take the relevant cables, giving the best possible quality, and they guarantee a clean sound. Frequency response: 20 Hz 50 kHz +/- 0.5 dB, Output voltage: 2V Total harmonic distortion: < 0.1 % (1 kHz, 1 Watt) Input sensitivity: 240mV, Signal-Noise ratio: > 90 dB Input impedance: 47 kOhm, Inputs (golden): 4 x RCA, 2 x XLR NEUTRIK Outputs (golden): 2 x RCA, 1 x RCA Rec Out, 1 x XLR NEUTRIK Power Control Switched output voltage: 2 x Trigger 12 V (Output) Mains supply: 230 V/50 Hz, Weight: 10 kg Dimensions (WxHxD): 430 x 135 x 370 mm, Colour: black/silver Tubes: 4 x 12AX7, 3 x 12AU7, double transformer A valve Pre-Amplifier to meet the highest standards. Inside, the 4x12AX7 and 3x12AU7 valves provide the perfect pre-amplification for weak signals. The circuitry with its negative feedback design is the optimum of linearity and sound. Gold-plated high-grade Neutrik XLR input and output connectors take the relevant cables, giving the best possible quality, and they guarantee a clean sound.
PAC60Cip is the portable six phase real time simulation amplifier.This current amplifier is similar to PAC60Ci but it has lower output power and less weight. PA30Bip is real time simulation amplifier with three-phase current and four-phase voltage. PA30Bip-H is digital power amplifier with three-phase current and four-phase voltage. It is similar with PA30Bip but it has higher voltage output and power output. PAV250Bip is the portable six-phase real time simulation amplifier. This voltage amplifier is similar to PAV250Bi but it has small size and less weight. PAV120Bip is the portable six-phase real time simulation amplifier. This voltage amplifier is similar to PAV120Bi but it has small size and less weight.
