Pre Amplifiers
and Mixer Digital Amplifier
" Mixer Amplifier" refers to a constant pressure amplifier with a front stage magnification, which can be directly connected to the micro and other signal sources without a mixer. The output voltage does not change with the change of the load impedance, that is, a power amplifier that outputs the maximum constant voltage of an audio signal, applying the deep negative feedback, outputs stable voltage, and the magnitude of the load within the rated power range has little effect on the output voltage of the amplifier. In order to reduce the power loss of the transmission line in long distance power transmission, the output transformer needs to be used. The output voltage contains mainly 70V, 90V, 120V and so on. The higher the voltage, the smaller the loss of transmission line. But because of the use of the output transformer, the sound quality is not very good. It's generally used in background music system and cable broadcasting system. Simply speaking, preamplifier is only an effector for sound quality regulation. Itself has no amplifier circuit, and the power is not so high. It can not directly drive the sound box make a sound. It is necessary to connect a PA machine to make the sound box work. The pure post PA does not have a preconditioning circuit, and can not tune the sound quality and karaoke without a front effect device. The combined amplifier is not suitable for wide band amplifier, but has many applications in active subwoofers.
The RH-AUIDO Pre Amplifier is a device that converts a weak electrical signal into an output signal strong enough to be noise-tolerant and strong enough for further processing, or for sending to a power amplifier in the sound system.
Featured built-in CHIME and SIREN circuitry with push button on front panel, the SIREN tone for an orderly emergency evacuation of people and conducting a fire or an emergency drill manually, and the CHIME tone for attracting listeners' attention prior to speaking.
5 MIC inputs, 3 AUX inputs, 2 EMC input,4 AUX outputs,features muting function that MIC1 overrides MIC2,MIC3,AUX1,AUX2 with 0~30dB dB attenuation.
It is designed for background music/paging and public address system installations,these units are exceptional values, loaded with features,and are easy to install in a variety of system designs.
Send product request
Other supplier products
 |
Best Sound Reinforcement Speaker RH-KT24 for Gardens | Best Sound Reinforcement SpeakerRH-KT24 for Gardens ※ Waterproof house and speaker diver with IP66 rating ※ Squirrel shape ※ 70V 100V transformer b... |
 |
16 Zone Remote Microphone RH2816RT | ※ Several paging modes (all zones, group zones,or individual zone). ※ Working with 16 zone paging selector or 16 zone audio matrix for paging funct... |
 |
Desktop Paging Chime Microphone RH301MC | Desktop Paging Chime MicroRH301MC ※ Compact desktop paging micro with gooseneck positioning flexibility for sound reinforcement applications. ※ D... |
|
|
6inch Full Range Fireproof Speaker with Back Cover RH-T64 | ※ ABS baffle with back cover. ※ Full-range 6" speaker. ※ 100 V line transformer features two taps for 3 W and 6 W outputs. ※ This technique of line... |
 |
30W Outdoor Sound System Speaker Waterproof RH-KT27 | ※ Waterproof house and speaker diver with IP66 rating ※ Mushroom shape in color green,red and yellow available ※ 70V 100V transformer built-in ※ M... |
Same products
 |
iPhone Earpiece Speaker with Proximity Sensor Cable Replacement - China Phonefix | Seller: Shenzhen Wikshu Technology Co. | Description Original iPhone Parts-Ear Speaker with Proximity Sensor Flex Cable for iPhone X/11/12... |
 |
Zone Mixer Amplifier | Seller: Guangzhou DSPPA Audio Co., Ltd. | DSPPAproduction line covers all kinds of Mixer Amplifiers: one zone DSPPA mixer amplifier, multi-... |
 |
Mini Mixer Amplifier | Seller: Guangzhou DSPPA Audio Co., Ltd. | What Is Mixer Amplifier Mini mixer amplifieris a kind of amplifier with small size , they are eq... |
 |
MINI60 Digital Mini Amplifier | Seller: Guangzhou DSPPA Audio Co., Ltd. | Features ● Wireless Bluetooth playing. ● Voice recording function (AUX mode). ● Playing of USB... |
 |
Mini60 2x30W Mini Digital Amplifier with USB & Bluetooth | Seller: Guangzhou DSPPA Audio Co., Ltd. | Features ● Built-in 2x30W stereo Class D amplifier ● Support wireless Bluetooth 3.0 and USB/SD ... |
