Headphone amplifier impedance

Product details of PAM8610 15W + 15W Two Channel Stereo Class D Amplifier Board Supply voltage: DC 7V-15V 2. Output power: 10w + 10w (8 load) 3. Efficiency: 90% 4. Shutdown Current: 4uA 5. Quiescent current; 20mA 6. SNR: 86% 7. Total harmonic distortion: 5W / 1KHz / 8 ---- 0.1% 8. Frequency range: 20Hz-20KHz 9. Input impedance: 15K 10. Output Impedance: 4-8 11. Amplifier board size: 30mm * 25mm * 2.5mm 1. The power supply voltage limit is 16.5V, do not use more than this voltage. 2. The power supply is recommended for 12v, 3A power supply filter better 3. 4-8 inch stereo speakers recommended. 4. Do not short-circuit the audio output to each other or shorted to ground. 5. Carefully check before electricity, ensure wiring is correct before electricity.

XH-A302 Bluetooth amplifier board adopts amplifier chip with high-fidelity stereo sound quality; supports Bluetooth and AUX audio input; amplifier is equipped with Bluetooth 5.0 high-speed transmission, and the effective transmission distance of Bluetooth is 20 meters for unobstructed connection, (depending on personal mobile phone Bluetooth configuration, The signal strength is different, the transmission distance will also be different). The amplifier input is DC12-24V, with dual-channel output, the output impedance is 4-8Ω, and the maximum is 50W*2; the on-board function buttons can freely adjust the volume, switch songs, and select the input mode.

Omni-Directional, Super-soft Ear Pads Stereo Sound Adjustable Headband 3.5mm Plug Frequency response: 20 Hz - 20 kHz Nominal Impedance: 32 ohm Sensitivity: 97 dB / 10 mW / 3 mm Jack plug: OD 3.5 mm stereo Cable Length: 2.4 m In-Line Mic is great for messenger on the PC!

CA-6928 Bluetooth audio module Bluetooth power amplifier board 3.3v-5v: CA-6928 Bluetooth Stereo Audio Module For Power Amplifier Board 3.5V~5V Features: Input Voltage: DC 5 V Audio Out: L R G (it must be connected to the amplifier) Receive audio signals from mobile Extraordinary Range 10 meters. Smallest and Powerful Best for any kind of amplifier. Dimensions: 24mm x 15mm x 1mm Supply: 3.5~5V Dc Current; 300ma Impedance; 4~8ohms For Free Information About Circuits Electronics Projects

Brand Name: AMIC DIGITAL STORE Vocalism Principle: Dynamic Active Noise-Cancellation: Yes Control Button: Yes Communication: True Wireless Volume Control: Yes Impedance Range: up to 32 Ω Headphone Pads Material: Silicone Waterproof: Yes Frequency Response Range: 20 - 20000Hz Magnet Type: Neodymium Wireless Type: Bluetooth Line Length: 10m Package List: User Manual, Pair of Earbuds, Charging case, Charging Cable Driver Diameter: 10mm Resistance: 32Ω Sensitivity: 10dB Is wireless: Yes Bluetooth Version: 5.1 Total Harmonic Distortion: 1% Charging Method: Charging case Max Output: 1000mW Support APP: Yes Function: for Video Games, Common Headphone, For Mobile Phones, HiFi Headphone, Sport With Microphone: Yes Features: waterproof, With Microphone, Active Noice Cancelling Name: Wireless Bluetooth 5.1 Earphones Feature 1: Bluetooth V5.1+ Touch Control+Gaming Headsets Feature 2: Auto Pairing + Bluetooth Headphone Style 3: Sports headphones, Waterproof + Binaural Call Bluetooth Version: Bluetooth 5.1 Earphone Music Time: Around 4-5 Hours

Features★ 6.35mm to 3.5mm stereo adapters allow a 6.35mm (1/4 inch)stereo port to accept a stereo cable with a standard 3.5mm (1/8 inch) plug★ Connect headphones to audio devices such as amplifiers or AV receivers with 6.35mm socket★ Convenient and cost-effective 1/4 inch to 1/8 inch stereo adapters provide spare or replacement adapters to use on different audio systems★ 360 degree grip treads help easy plugging and unplugging Specifications★ Connector 1: 6.35mm (1/4 Inch) Stereo Jack Male★ Connector 2: 3.5mm (1/8 Inch) Stereo Jack FemaleInstructions★ Product Features: Audio Adapter★ Product channel: Two-channel, stereo★ Usage: Apply to the mixer, amplifier, audio amplifier 6.35mm to 3.5mm headphone plug interface, converters use microphones, speakers or electric piano, organ, drums,and so on.★ Other Name: 6.35mm to 3.5mm adapter,or 6.5mm to 3.5mm adapterPackage Included1 x 1/4 Inch Male to 1/8 Inch Female Stereo Adapter

SYSTEM REQUIREMENTS mac OS 10.12, 10.13, 10.14, 10.15 (latest update), Intel Core i5, 4 GB RAM Windows 10 version 1803 or later (64 Bit), Intel Core i5 or equivalent CPU, 4 GB RAM SUPPORTED AUDIO FORMATS MP3, WAV, AIFF, Audio-CD, FLAC, Ogg Vorbis, non-DRM AAC GENERAL Monitor with 1280 x 800 screen resolution, USB 2.0, 1 GB free disc space. An internet connection and a graphics card which supports OpenGL 2.1 or higher are required to download and activate TRAKTOR software. Once installed and activated, all products can be used offline. SUPPORTED DRIVERS Core Audio, WASAPI, ASIO, DirectSound DIMENSIONS 542 mm / 339 mm / 60.5 mm 21.34" / 13.35" / 2.38“ HARDWARE SPECIFICATIONS AUDIO INPUTS (A/D) Channels: 4 Stereo Sample Rate / Resolution 96-kHz / 24-bit Converter Cirrus Logic CS5368 LINE INPUTS DNR (a-weighted) 110 dB Frequency Response 20 Hz - 20 kHz, +0.1/- 0.05 dB THD+N 0.002% MIC INPUT DNR (a-weighted) @ 1 kHz 104 dB Frequency response 20 Hz - 20 kHz, +0.04/- 2.7 dB PHONO INPUTS Input Impedance 48.5k? DNR (a-weighted) @ 1 kHz 78 dB AUDIO OUTPUTS (D/A) Channels 2 Stereo Sample Rate / Resolution 96-kHz / 24-bit Converter Cirrus Logic CS4385 LINE OUTPUTS (XLR & 1/4" BOOTH) DNR (a-weighted) 110 dB Frequency Response 20 Hz - 20 kHz, +0.4/- 0.2 dB THD+N 0.001% LINE OUTPUTS (RCA) DNR (a-weighted) 110 dB Frequency Response 20 Hz - 20 kHz, +0.6/- 0.2dB THD+N 0.001% HEADPHONE OUTPUT Load Impedance 33? DNR (a-weighted) 104 dB Frequency Response 20 Hz - 20 kHz, +0.4/- 0.3 dB Views: 2

Vocalism Principle: Dynamic Control Button: No Active Noise-Cancellation: No Communication: True Wireless Volume Control: No Style: In-Ear Sensitivity: 105dB Is wireless: Yes Max Output: 0.1mW Line Length: 0m Support APP: No Function: For Video Game;For Mobile Phone;HiFi Headphone;Sport Number Of Drivers: 2 Plug Type: L Bending Impedance Range: up to 32 Ω Earcups Type: Sealed Headphone Pads Material: Other Bluetooth Version: 5.0 Codecs: AAC;Apt-X;SBC Support Memory Card: No Driver Diameter: 5.8mm Resistance: 32Ω Waterproof: Yes Frequency Response Range: 20 - 20000Hz Total Harmonic Distortion: 0.02% Features: Waterproof;With Microphone;Apple Siri Support Charging Method: Charging case Magnet Type: Neodymium Bluetooth Protocol: HSP, HFP, AVRCP, A2DP Bluetooth Frequency: 2400MHz-2483.5MHz Bluetooth Range: 10M / 33Fft Audio Codec: Qualcomm aptX, AAC, SBC Earbuds Capacity: 2*60mAh Charging Case Battery: Built-in Lithium polymer battery Charging Case Capacity: 300mAh 3.7V (1.11Wh) Charging Limited Voltage: 5.25V Charging Port: USB-C Fully Charge the Earbuds: 1.5h Fully Charge the Case: 2h Operating Time: 9H-10H playtime on one charge Total Operating Time: 27H-30H playtime with charging case

Earcups Type: Sealed Max Output: 10 Number Of Drivers: 2 Charging Method: Charging case Driver Diameter: 13 Total Harmonic Distortion: 1 Impedance Range: up to 32 Ω Bluetooth Version: 5.1 Package List: User Manual, Charging case, Charging Cable, Ear Plug Rubbers Features: waterproof IPX5, With Microphone, Active Noice Cancelling With Microphone: Yes Is wireless: Yes Support APP: No Support Memory Card: No Resistance: 32 Line Length: 0 Frequency Response Range: 20-2000 Sensitivity: 92 Plug Type: NONE Function: for Video Game, Common Headphone, For Mobile Phone, HiFi Headphone, Sport Active Noise-Cancellation: Yes Volume Control: Yes Control Button: Yes Vocalism Principle: Dynamic Wireless Type: bluetooth Connectors: Type c Communication: Wireless Style: In-ear Certification: CE,FCC Origin: Mainland China Brand Name: Lenovo

For teaching, waist machine, V-band wireless microphone, U-band wireless microphone and computer microphone. 2. This microphone can be directly be plugged in the microphone interface of amplifier, laptop. 3. Recording is clear; small size, light weight, easy to carry. Specifications 1. Connection plug: 3.5 mm 2. Microphone size: F6.0 × 5.0 mm 3. Sensitivity: -52dB ± 2dB 4. Directionality: Omnidirectional 5. Impedance: = 680O 6. Working voltage: 2.0V 7. Frequency range: 100-16kHz 8. Signal to noise ratio: 60dB 9. Line length: about 120 cm / 47.24 in 10. Plug diameter: 3.5mm 100CM braided wire Product Contents 1 x microphone for mobile phone 1 x metal clip 1 x sponge windscreen

Hex plastic housing. 6.35mm socket to 3.5mm plug. Hole Diameter: 3.5mm/0.14"; Total Size(Approx.): 53 x 12mm / 2.1" x 0.5" (L*W) Easy to use ordinary 3.5mm 6.35mm headphone jack on the amplifier. Package Content: 2pcs x Audio Adapter A great solution to many problems

Type:In-Ear Wire-control: Yes Conductor Material: Enameled copper wire Speaker Impedance: 16Ω Weight: 10g Wire Length: 1.2m Headphone Sensitivity: 93dB Plug Type: 3.5mm nickel plated Maximum Practical Power: 3mW Frequency Response Range: 20-20,000Hz Metal diaphragm ensures durability and long life Scratch-resistant and slip-resistant body Tangle-free flat cable

Connector: 3.5mm & lightning(optional) Sensitivity: 100±3dB Impedance: 32Ω Frequency response: 20Hz-20KHz Color: White Cord Length: 1.1m / 3.6ft Headphone Weight: 11g / 0.39oz Package Size: 11.5 * 8.5 * 2.7cm / 4.52 * 3.34 * 1.06in Package Weight: 33g / 1.16oz