A1 80Wx2 Class D Digital Power Amplifier Dual MA12070 Power Amp (A1c with OPA1612 & Bluetooth)

A1 80Wx2 Class D Digital Power Amplifier Dual MA12070 Power Amp (A1c with OPA1612 & Bluetooth)

A1c Version:
* Chip: Dual MA12070
* Bluetooth: JL chip (SBC / 44.1K)
* Power: 80W × 2 (4Ω)
* Input Voltage: 12–24V (DC / 2.5mm socket)
* Output Channels: Left and right channels (stereo)
* Bluetooth Antenna: Included
* Op-amp: 1 x OPA1612 (treble and bass adjustable)

Features:
Power Supply Capacitors
* It uses Japanese "Blue Robe" series audio capacitors for ELNA.
* It uses original "Gold FM" series audio capacitors for Nichicon, which offer excellent overall sound performance, high stability, and smooth, delicate vocal rendering.
* A large number of filtering capacitors can effectively filter out the AC interference components in the rectified pulse DC, thereby reducing background noise and making the audio output purer.

Amplifier Chips
* It is equipped with two original MA12070D Class-D amplifier chips for Infineon.
* The chips deliver power output up to 160W, easily driving floor-standing speakers.
* THD+N is as low as 0.003%, ensuring low distortion, with a high SNR of up to 110 dB.

High Power
* Thanks to advanced multi-stage high-frequency core technology, it can operate for extended periods without overheating and is resistant to power supply ripple interference. Its performance metrics surpass those of the TPA3116.

Preamplifier Op Amp
* It utilizes an active pre-amplification and buffering design.
* Compared to other structures without pre-amplification, this is more effective in improving dull high frequencies and weak, loose low frequencies.

Op Amp
* It is equipped with socketed IC slots, allowing easy plug-and-play replacement of different op-amps to suit various music styles — making the A1 more fun and customizable.

MCU Software Control
* Independently developed microcontroller (MCU) software optimizes the performance of the MA12070.
* It features automatic input signal amplitude detection and clipping elimination technology.
* Song switching, fast-forwarding, changes in sampling rate, etc., can all cause clipping or distortion. This issue is effectively resolved through software control optimization.

High-Quality Power Supply
* It features a true dual-source positive and negative voltage power supply design.
* Analog signals contain both positive and negative half-cycles. If a single power supply is used, the negative half-cycle of the signal cannot be properly amplified because the op-amp's output cannot go below its minimum supply voltage.

* By using a positive and negative voltage power supply, both the positive and negative half-cycles of the AC signal can be fully amplified, thus preserving signal integrity.

Wide Dynamic Range
* It operates within a larger voltage range, handling higher amplitude signals without entering saturation, which directly impacts the clarity and detail of the sound.

Power Supply Circuit
* It uses LDO chips to provide independent linear power supply to internal circuits.
* An important parameter of power supply is Power Supply Rejection Ratio (PSRR), which effectively suppresses ripple and noise on the input power. In audio circuits, 217Hz noise from the power supply is a common issue, and LDOs can provide suppression of at least several tens of dB, significantly reducing the impact of this noise on sound quality.

Connection Method
* The power amplifier uses silver-plated wires connected to speaker terminals.
* Built-in low-loss small crystal pure copper speaker terminals.
* Compatible with banana plugs, Y-shaped speaker wires, or direct wire clamps.

High-Fidelity Detail
* It preserves more sound details
* Rich details and obvious dynamics
* Low power consumption and better output efficiency

Advantages of the A1 Series Power Amplifier:
* 24V Power Supply: Higher voltage means greater output power; 19V cannot fully unleash the performance of the MA12070 chip.
* Remote Control: Supports long-distance volume adjustment, power on/off, channel switching, etc.
* Three Input Interfaces: Bluetooth, 3.5mm, RCA. Rich input options.
* Independent Treble and Bass Adjustment: Most single-knob designs do not have separate treble and bass controls.
* Three Output Connection Methods: Pure copper speaker posts, supporting banana plugs, Y connectors, and wire clamping.
* Dual Positive and Negative Voltage Power Supply for Op-Amps: Single voltage circuits cannot fully realize op-amp performance.
* Reserved IC Socket Allows Plug-and-Play Op-Amp Replacement Without Soldering: Models without IC sockets require soldering.
* Software-controlled Power On/Off, Avoiding Speaker Shock: Mechanical toggle switches are easier to develop; software control programming costs more.
* Two MA12070 Amplifier Chips: Compact size with strong driving power and output power up to 160W
* Simple Panel Design, No Front Screws: Panels without front screws are three times more expensive than those with fixed screws.

Applications of the A1 Series:
* Using a smartphone as a player – Transmit audio via Bluetooth to the amplifier, then connect to passive speakers.
* Use the TV audio with a 3.5mm to RCA cable, output to the amplifier to form a home theater system.
* Connect the decoder output using a dual RCA cable to the amplifier, then connect to passive speakers.
* Use a 12V car power supply for the amplifier, connect to car navigation, then connect to car speakers.

Architecture Overview:
* Infrared remote control receiver can remotely adjust volume and switch channels (remote control sold separately)
* Power switch indicator light and input channel indicator lights on the panel
* Panel reserved AUX 3.5mm analog signal input jack
* Taiwan RX volume adjustment knob with good damping feel
* European brand film capacitors, with excellent characteristics, enhance the analog warmth of the digital amplifier.
* British gold-series high-grade audio electrolytic capacitors for Nover
* Optional JL Bluetooth 5.0 receiver chip supports AAC/SBC, 44.1kHz / 16bits
* Shenzhen DD high-quality gold-plated RCA sockets and Bluetooth antenna socket
* Shenzhen DD pure copper crystal speaker terminals (compatible with banana plugs and Y-type speaker wires)
* Shenzhen DD DC power supply socket (5.5 × 2.5 mm)
* Shanghai Pengshen high-temperature resistant 1 sq mm silver-plated wire connecting speaker terminals (approximately 18 AWG)
* Original BC low internal resistance high-speed filter capacitor array for Vishay
* Two original MA12070P Class-D audio amplifier chips for Infineon
* Reserved plug-in dual operational amplifiers for front-stage amplification. They can be replaced.
* Panel touch buttons: short press to switch channels, and long press to power on/off.

Specifications:
* Model: A1
* Dimensions (excluding antenna): 126 mm (L) × 95 mm (W) × 30 mm (H)
* Weight: 380g
* Amplifier Chip: MA12070
* Impedance Range: 4Ω – 8Ω
* Input Voltage: 12V–19V (19V recommended)
* Rated Power: 80W × 2 (4Ω)
* Output Channels: Left and right channels (stereo)
* Signal Input: Bluetooth 5.0 / Dual RCA / AUX (3.5mm)
* Signal-to-Noise Ratio (SNR): 110 dB
* Total Harmonic Distortion (THD): <0.003% (1kHz, 1W)
* Frequency Response: 18 Hz – 25 kHz
* Gain: 28 times
* Power On Method: Panel button power on/off

Packing List:
* 1 x Main Unit
* 1 x Bluetooth Antenna
* 1 x Product Certificate of Conformity
* 1 x Warranty Card
    
Packaging Details:
* Weight: 0.7kg

Note:
* Components and appearance may change periodically; please refer to the actual product.
* Please contact us for the electronic instruction manual after purchasing. Thank you!
* The Bluetooth function is optional. You can purchase the version with Bluetooth from our store.
* Power supply and cables are sold separately.