高低音电子-High and low pitch Electronic Technology

AG-50乐器前置放大器 Instrument Pre-amplifier

Mon, 27 Apr 2026 18:18:15 +0800

内置锂电池可充电

四段均衡器电路

兼容电磁式主动、被动拾音器，贴片压电拾音器；

增益：22dB

输入接口：6.5mm TR大二芯

HIGH GAIN接口：输入电平60mV RMS，输入阻抗240KΩ

LOW GAIN接口：输入电平120mV，输入阻抗44KΩ

输出接口：6.5mm TR大二芯，3.5mm TRS

输出阻抗：600Ω

四段均衡分别为：低音±9.5dB@60HZ、中低音±12dB@200HZ、中高音±9.5dB@1KHZ、高音±18dB@10KHZ

电池容量：500mah，续航时间约15小时

指示灯状态：连续闪4下表示4格电量，3下表示3格电量，2下表示2格电量，1下表示1格电量，充满电灯常亮。

Built-in Rechargeable Lithium Battery

4-Band Equalizer Circuit

Compatible with: Active and Passive Magnetic Pickups, Piezoelectric Pickups (Surface Mount)

Gain: 22dB

Input Connector: 1/4" TR

HIGH GAIN Input: Input Level 60mV RMS, Input Impedance 240KΩ

LOW GAIN Input: Input Level 120mV, Input Impedance 44KΩ

Output Connectors: 1/4" TR, 1/8" TRS

Output Impedance: 600Ω

4-Band EQ Details:

Bass: ±9.5dB @ 60Hz

Low-Mid: ±12dB @ 200Hz

High-Mid: ±9.5dB @ 1kHz

Treble: ±18dB @ 10kHz

Battery Capacity: 500mAh

Battery Life: Approx. 15 Hours

LED indicator status: 4 consecutive flashes indicate 4 bars of battery, 3 flashes indicate 3 bars, 2 flashes indicate 2 bars, 1 flash indicates 1 bar; light stays on when fully charged.

BT-3C 立体声三进一出混音器带蓝牙接收 Stereo three-channel mixer with Bluetooth

Thu, 12 Mar 2026 14:19:04 +0800

立体声二路有线输入，一路蓝牙音频无线输入，三路混合输入，每一路音量可独立调节；

输入支持音频信号、乐器、动圈麦克风；

输入接口：立体声3.5mm，6.5mm

输出接口：立体声3.5mm，6.5mm

频率响应：20HZ-20KHZ

输入阻抗：22KΩ

输出阻抗：600Ω

增益：12db

蓝牙名称：BT-GDY

蓝牙版本：5.4

电池型号：18650（可拆卸）

电池容量：2000mah

续航时间约：15小时

指示灯状态：连续闪4下表示4格电量，3下表示3格电量，2下表示2格电量，1下表示1格电量，充满电灯常亮。

- Stereo 2-channel wired input, 1-channel Bluetooth audio wireless input, 3-channel mixed input, with independent volume control for each channel;

- Input supports audio signals, instruments, and dynamic microphones;

- Input interfaces: Stereo 1/8'', 1/4'' TRS;

- Output interfaces: Stereo 1/8'', 1/4'' TRS;

- Frequency response: 20Hz–20kHz;

- Input impedance: 22kΩ;

- Output impedance: 600Ω;

- Bluetooth name: BT-GDY

- Gain: 12dB;

- Bluetooth version: 5.4;

- Battery model: 18650 (removable);

- Battery capacity: 2000mAh;

- Playback time: Approx. 15 hours;

- LED indicator status: 4 consecutive flashes indicate 4 bars of battery, 3 flashes indicate 3 bars, 2 flashes indicate 2 bars, 1 flash indicates 1 bar; light stays on when fully charged.

SP-T1 喇叭线转RCA线路电平输出

Wed, 11 Mar 2026 10:11:05 +0800

喇叭输出 → 线路输出（高电平转低电平）

单声道输入 / 输出

内置隔离变压器，支持共地隔离

衰减量可调：-4dB ~ -30dB

共地 / 隔离可选跳线

假负载电阻（ON/OFF 可选）

可调电阻调节输出音量

适合 10W 以下功放

1500W OCL功放电路

Sat, 27 Dec 2025 15:30:39 +0800

采用10对功率管输出

一款低成本易于制作的的功放扬声器保护电路图

Sat, 27 Dec 2025 14:54:47 +0800

电路由4个常见的三极管构成，成本低易于制作，供电电压为24V时用24V继电器，可改为12V-15V供电，用12V继电器。

VM-3带闪避功能的音频混音器 Audio mixer with dodge function

Tue, 23 Dec 2025 18:46:53 +0800

功能：当检测到麦克风说话时压低背景音乐的声音，停止说话时自动恢复到正常状态。

MIC IN麦克风输入接口

6.5mm：适合动圈麦克风，会议鹅颈电容麦克风等；

3.5mm：支持三段式插头，内置偏压适合5V电容麦克风，驻极体麦克风等，由于电容麦克风种类繁多，加上插头的组合有很多种，如果不明白可在线咨询；

AUDIO IN音频输入：RCA莲花接口

OUT输出：RCA莲花接口

功耗：0.25W

电源：DC12V-24V之间，请使用优质低纹波电源适配器供电。

话筒放大增益：36db

话筒输入阻抗：2KΩ

音频输入增益：0db

音频输入阻抗：：50KΩ

输出阻抗：600Ω

MIC VOL:话筒音量调节；

AUDIO VOL:背景音乐音量调节；

三个可调电阻功能说明：

①：灵敏度，麦克风音量需要多大才可以触发闪避；

②：恢复时间，当麦克风停止说话时，恢复到正常播放背景音乐的的时间；

③：压限深度，当麦克风说话时闪避开始工作，背景音乐的声音大小压低的程度，可以完全静音，也可以适当保留一些。

Function: When the microphone detects speech, it lowers the volume of background music. It automatically returns to normal when the speaking stops.

is often used in commercial paging sound systems, general public address applications, and live events. It can be used for everything from paging, announcements, or messages to automated emergency alerts or anything that needs a priority source to lower the volume level of a secondary audio source, like the background music, to ensure it's audible for your listeners. Once the Priority signal is no longer present, the other audio source(s) can go back to where they were.

Microphone Input Interfaces:

6.35mm: Suitable for dynamic microphones, conference gooseneck condenser microphones, etc.

3.5mm: Supports three-pole plugs, with built-in bias suitable for 5V condenser microphones, electret capsules, etc. Due to the wide variety of condenser microphones and different plug combinations, please be careful to distinguish.

Audio Input: RCA interface

Output: RCA interface

Power Consumption: 0.25W

Power Supply: DC12V-24V; please use a high-quality, low-ripple power adapter for power supply.

Microphone Amplification Gain: 36dB

Microphone Input Impedance: 2KΩ

Audio Input Gain: 0dB

Audio Input Impedance: 50KΩ

Output Impedance: 600Ω

Explanation of the Three Adjustable Resistors' Functions

① Sensitivity: The minimum microphone volume required to trigger the ducking effect.

② Recovery Time: The time it takes for the background music to return to its normal playback volume after the microphone stops receiving input.

③ Depth: The degree to which the background music volume is reduced when the ducking effect activates (i.e., when the microphone is in use). This can range from complete muting of the background music to retaining a moderate level of it.

支持电脑软件设置音效的卡拉OK话筒DSP混响前级板

Thu, 18 Dec 2025 15:16:58 +0800

支持电脑软件设定，调试好可以下载保存到芯片；

各种声音效果，大厅房间、延时、变调、变声、金属、电音、哇音、乒乓、合唱等；

各种EQ参数、重低音、3D立体声加宽器、谐波激励器、带通滤波器、低通高通滤波器、陷波器等；

增益调节、降噪、AGC、压限、防啸叫、移频、人声消除等。

内置宽电压DC/DC升降压电路；

电源反接保护；

开关机静音电路，开关机时基本没有冲击声；

工作电压：DC9V-40V；

功耗：1.6W；

USB接口：TYPE C

LFA-18无源低音低频衰减器 Passive bass attenuator

Wed, 10 Dec 2025 21:23:21 +0800

功能：衰减音频信号中的低音部分，提高声音清晰度。

开关弹起时转折频率150HZ，50HZ最大衰减量-10db；

开关按下时转折频率250HZ，50HZ最大衰减量-14db；

输入接口：立体声3.5mm，RCA莲花接口；

输出接口：立体声3.5mm，RCA莲花接口；

输入阻抗：50KΩ；

输出阻抗：50KΩ。

Function: Attenuates the bass part of the audio signal to improve sound clarity.

When the switch is off: the cutoff frequency is 150Hz, and the maximum attenuation at 50Hz is -10dB;

When the switch is on: the cutoff frequency is 250Hz, and the maximum attenuation at 50Hz is -14dB;

Input interfaces: Stereo 3.5mm, RCA interfaces;

Output interfaces: Stereo 3.5mm, RCA interfaces;

Input impedance: 50KΩ;

Output impedance: 50KΩ.

LM-12GI立体声音频隔离衰减器 Stereo audio isolation attenuator

Thu, 30 Oct 2025 19:38:17 +0800

功能：将功放机扬声器输出端口高电平转为线路输出或者麦克风电平信号。

内部采用坡莫合金隔离变压器，频响好抗干扰

转换后的线路输出低电平信号可接有源低音炮，调音台，功放机或者其他音频设备线路输入接口；

转换后的麦克风输出低电平信号可接调音台、声卡或者其他音频设备的麦克风输入接口；

输入接口：螺钉插拔式接线端子；

线路输出接口：RCA莲花接口；

麦克风输出接口：3.5mm；

频率响应：40HZ-20KHZ

输入信号电压范围：4Ω/1W 8Ω/0.5W 2V至4Ω/100W 8Ω/50W 20V

衰减量：线路输出端：-7db至-33db可调；

麦克风输出端：-28db至-43db可调；

Function：

Convert the high-level signal from the power amplifier's speaker output port into a line output or microphone-level signal.

It uses a permalloy isolation transformer internally, which delivers excellent frequency response and anti-interference performance.

The converted low-level line output signal can be connected to the line input interfaces of active subwoofers, mixers, power amplifiers, or other audio devices.

The converted low-level microphone output signal can be connected to the microphone input interfaces of mixers, sound cards, or other audio devices.

Interfaces & Technical Parameters

Input Interface: Screw plug-in terminal block

Line Output Interface: RCA phono interface

Microphone Output Interface: 3.5mm

Frequency response: 40HZ-20KHZ

Input Signal Voltage Range: 4Ω/1W, 8Ω/0.5W (2V) to 4Ω/100W, 8Ω/50W (20V)

Attenuation:

Line Output: Adjustable from -7dB to -33dB

Microphone Output: Adjustable from -28dB to -43dB

M-38DC话放麦克风放大器 Microphone preamplifier

Tue, 21 Oct 2025 16:05:02 +0800

M-38DC是一款兼容多种麦克风的前置放大器，具有三种常见的输入输出接口，适应性好，同时内置48V幻象供电。

接口及旋钮功能：

MIC IN：话筒输入接口，3.5mm、6.5mm、XLR卡侬，三种接口；

MIC OUT：话筒输出接口，3.5mm、6.5mm、XLR卡侬，三种接口；

POWER：电源开关；

48V：幻像电源开关

GAIN：增益大小调节，最大38db；

DC5V：直流供电接口；

功耗：0.2W（48V关），1.8W（48V开）

频率响应：20HZ-20KHZ

总谐波失真THD：0.0023%

输入阻抗：XLR 6.35mm平衡式1.5KΩ

输出阻抗：平衡式250Ω

The M-38DC is a versatile preamplifier compatible with multiple microphones, featuring three common input/output interfaces for excellent adaptability, and built-in 48V phantom power supply.

Interface & Knob Functions:

MIC IN: Microphone input ports (3.5mm, 6.5mm, XLR );

MIC OUT: Microphone output ports (3.5mm, 6.5mm, XLR );

POWER: Power switch;

48V: Phantom power switch;

GAIN: Gain adjustment knob (maximum 38dB);

DC5V: DC power supply interface;

Power Consumption: 0.2W (when 48V off), 1.8W (when 48V on);

Frequency Response: 20Hz–20kHz;

Total Harmonic Distortion (THD): 0.0023%;

Input Impedance: Balanced XLR/6.35mm at 1.5KΩ;

Output Impedance: Balanced 250Ω.

高低音电子-High and low pitch Electronic Technology

AG-50乐器前置放大器 Instrument Pre-amplifier

BT-3C 立体声三进一出混音器 带蓝牙接收 Stereo three-channel mixer with Bluetooth

SP-T1 喇叭线转RCA线路电平输出

1500W OCL功放电路

一款低成本易于制作的的功放扬声器保护电路图

VM-3带闪避功能的音频混音器 Audio mixer with dodge function

支持电脑软件设置音效的卡拉OK话筒DSP混响前级板

LFA-18无源低音低频衰减器 Passive bass attenuator

LM-12GI立体声音频隔离衰减器 Stereo audio isolation attenuator

M-38DC话放麦克风放大器 Microphone preamplifier

BT-3C 立体声三进一出混音器带蓝牙接收 Stereo three-channel mixer with Bluetooth