TDA7850 4X50W HiFi Car Audio Power Amplifier Board Module BA3121 Denoiser DC 12V DC 14.4V with Time delay ACC interface

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$7.00 - $35.00 / Pieces | 1 Piece/Pieces (Min. Order)
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Quick Details
Brand Name:
Model Number:
Car Amplifier
Place of Origin:
Guangdong, China (Mainland)
Output Power:
Working Voltage:
Car / CD / Computer amplifier etc
ACC Interface:
Main Chips:
Frequency Response:
Working Temperature:
-45~85 C
Payment method:
Paypal or T/T or Western Union or L/C
Accept Custom-made:
Supply Ability
Supply Ability:
888888 Piece/Pieces per Month
Packaging & Delivery
Packaging Details
New And Original Packing
Shenzhen or HongKong
Lead Time :
In stock
Product Description

TDA7850 4X50W HiFi Car Audio Power Amplifier Board Module BA3121 Denoiser DC 12V DC 14.4V with Time delay ACC interface

TDA7850 car car power amplifier with ACC function control (sound quality enhanced version)

TDA7850 is ST's high-quality Hi-Fi car audio amplifier IC, single power supply 12V - 14.4V power supply, MOSFET amplified output, 4 x 50W HiFi amplifier, small distortion, low noise, anti-interference ability, with output short circuit and temperature protection , Especially in terms of power performance is particularly prominent, low power, stable, sound quality] good. For car audio upgrade and DIY 4-channel amplifier the most good choice.

HIFI concept design, can be used for multi-channel production, with a good performance noise reduction chip BA3121, effectively eliminating the total noise, TDA7850 and BA3121 can be considered a pair. With this piece of TDA7850, no longer have trouble to install a noise reduction circuit! This is a valuable design Oh!

Related parameters are as follows:

High output power capability:

4 x 50W / 4Ωmax (high power / 4 ohm speaker load)

4 x 30W / 4Ω14.4V, 1KHz, (10% distortion power / 14V voltage measurement, 1KHz signal / 4 ohm speaker load)

4 x 80W / 2Ωmax. (High power / 2 ohne speaker load)

4 x 55W / 2Ω14.4V, 1KHz, (10% distortion power / 14V voltage measurement, 1KHz signal / 2 ohm speaker load)


Regardless of car computer, MP3, GPS, mobile phones, CD and other car audio and video equipment can be simple and easy to connect, so you can listen to all kinds of wonderful music, days Lai sound, all the way go hand in hand.

Board size: length 65mm wide 50mm high 46mm

ACC function control introduction

(ST-BY) is the ACC control terminal, controlled by the ACC control signal amplifier work and standby state.

Standby current is about 12 milliamperes, basically no electricity. Through the ACC when the power amplifier board extension] when the function (extension) when about 3 seconds) play a slow start to prevent the impact of sound.

Boot order requirements, DVD boot and then power amplifier is the right boot.

Now found that most of the navigation are Andrews system, the boot is generally much slower than the conventional machine, then the power may be extended] slow start 3 seconds boot is not enough, the host is too slow to start the recommended amplifier board ACC control And the MUTE link of the original car amplifier module.

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Packing & Delivery
Our Factory

MZX-TECH Electronic & Technology CO.,LTD is good at selling electronic components many years on basic of our abundant stock,strict quality control, competitive price and fast delivery, up to now, we set up a good relationship with thousands of agents , OEM manufacturers, and have over 50 million electronic part inventories, Our aim is to make fastest quotation, and offer the best price and good quality for any BOM requirement list, and make long-tern business with our clients!

Our Service

How to order from us

1. Please confirm the model numbers and quantities that you would like to purchase to our sales person, or email to us.

2. We will send you a Proforma Invoice to specify net cost of mentioned goods and other relevant charges once you confirm the order.

3. After you arrange the payment and send us your bank slip, we will put your order down to production, and let you know the delivery date in 2 days.

4. When the goods are finished, we will send them by air express, or by sea, or other available shipping methods appointed by customers, and let you know the tracking number and estimated time of arrival.


1. For the first order, we have no limit for the quantity.

2. From the second order, the MOQ is 50pcs.

Payment Terms

T/T, Western Union, PayPal

1. Under T/T, please make sure no handling fee should be bear by Receiver.

2. Under PayPal, there will be 5% PayPal fee for each individual remittance.

3. We can put customers' orders down to production once we get the bank slip copy.

4. If order value less than 20,000USD, we should get 100% payment before production;

Lead Time

1. Sample order can be delivered from our factory in 3-5 working days.

2. General order can be delivered from our factory in 5-7 working days.

3. Mass production will be sent under negociation

OEM / ODM Service

1. If the total order quantities are above 50pcs, we can silk-screen print customer’s logo on the products, and put customer’s model numbers in the labels, boxes free of charge.

2. We accept ODM projects, and welcome your enquiries!

Warranty Policy

We provide two year warranty for CCTV Cameras and DVRs after the shipment date. Any product proves defective under normal usage, we will repair or replace it by free of charge.

1. If our customers could repair the products by themselves locally, we will supply necessary spare parts.

2. If the customers couldn't repair the products, the products will need to be sent back to us, and we repair and bear 50% freight charge. All of our products are 100% passed strictly quality inspection before delivery.

Technical Support

We have professional technical support team to support our customers, and if you have any question for the technology of our products, please email to us, and we will reply to you immediately. Also if you have any doubt for the information on our website or any feedback for the quality of our products, please email to us, and thanks for your all comments in advance.

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