Showing posts with label AK4490. Show all posts

Saturday, April 29, 2017

Enjoy CD-level Quality Sound with Wireless Bluetooth Connectivity

The new CSRA64XXX ROM series audio platform is designed for entry-level and mid-range Bluetooth speaker devices, bringing a new level of sound quality and functionality. It will be seen in the Bluetooth speakers, wireless headset, car audio, wireless hands-free products.

Bluetooth Tube Audio With CSRA64215

The audio platform supports Qualcomm's unique audio technology, including TrueWireless Stereo wireless stereo technology, cVc noise reduction technology, the sixth generation CVC voice enhancement technology.

The top model "CSRA64215" also supports aptX audio technology that provides CD-level sound quality with Bluetooth connectivity, as well as aptX low latency technology that can listen to aptX quality audio while watching video. "CSRA64210", "CSRA64110" are facing stereo, mono Bluetooth speaker equipment, suitable for high-cost effective products.

Three are built-in 16-bit stereo codec, digital-to-analog conversion SNR 95dB, support for Bluetooth 4.0 + EDR standard specification, Support A2DP 1.3, AVRCP 1.5, HFP 1.6 (including WBS / mSBC), HSP 1.2 and other related agreements, the effective distance of 10 meters.

There are some products that built in Bluetooth module with CSRA64215,whose actual listening experience is excellent.

It is a desktop Bluetooth tube amplifier, and will be better if it matched a pair high sensitivity speakers.

Tube Amplifier Wireless Bluetooth 4.2 Single-ended Class A Desktop 6N2 Preamp 6P1 Power Stage 2x3.5W APT-X

Or, you can us a Bluetooth 4.2 Decoder to refresh your old amplifier to enjoy CD level quality sound with Bluetooth connectivity. It is a Bluetooth decoder with Bluetooth 4.2 CSR64215 and DAC ES9023. The Bluetooth 4.1 version CSR64215 implemented digital signal transmission thought wireless function, the digital to analog conversion of audio output used a professional decoder chip ES9023 to play that the digital signal is decoded into an analog audio signal.

IWISTAO HIFI Bluetooth 4.2 Decoder Stereo CSR64215 DAC ES9023 Hardware Decoding APT-X

If you need the Bluetooth decoder with CSR8670, you may find here.They are Bluetooth decoder with Bluetooth 4.0 CSR867 and DAC AK4490. The Bluetooth 4.0 version CSR8670 implemented digital signal transmission thought wireless function, the digital to analog conversion of audio output used a professional decoder chip AK4490 to play that the digital signal is decoded into an analog audio signal, and finally OP amplified the analog audio signal and output it.

IWISTAO HIFI Bluetooth4.0 Decoder Stereo CSR8670 32-bit DAC AK4490 Hardware Decoding Bluetooth Optical Inputs PCM & DSD APT-X

IWISTAO Earphone Amplifier HIFI Solo with Bluetooth 4.0 CSR8670 32-bit DAC AK4490 Hardware Decoding Optical Inputs APT-X

Thursday, January 19, 2017

IWISTAO Earphone Amplifier HIFI Solo with Bluetooth 4.0 CSR8670 32-bit DAC AK4490 Hardware Decoding Optical Inputs APT-X

After the Bluetooth decoder with hardware decoding hit market, we also have developed an earphone amplifier with Bluetooth 4.0 CSR8670 APT-X, 32-bit DAC AK4490 Hardware Decoding, and Optical Input.

This is a Bluetooth decoder with Bluetooth 4.0 CSR867 and DAC AK4490. The Bluetooth 4.0 version CSR8670 implemented digital signal transmission thought wireless function, the digital to analog conversion of audio output used a professional decoder chip AK4490 to play that the digital signal is decoded into an analog audio signal, and finally OP amplified the analog audio signal and output it.

At the same time, the unit is compatible with optical input, optical input devices can be connected to any other optical fiber output, such as televisions, set-top boxes, projectors, DVD player, CD player, sound cards and other digital computer.

IWISTAO Earphone Amplifier HIFI Solo with Bluetooth 4.0 CSR8670 32-bit DAC AK4490

It has the features also as below.

Whole aluminum alloy casing.
Built-16M memory within CSR8670 chip
Adopted HIFI level op amp OPA2604 as output.
Adopted HIFI parts and components at signal input and output, such as 1% metal film resistors, capacitors, audio ELNA and Nichicon capacitors, Phil ips CCB film small Signal filtering capacitors, and gold-plated RCA audio output jack.
Adopted imported original ST regulator, and digital power supply used independent of the LM1117 3.3 V regulator.
Adopted independent hardware decoding AK4490 decoder chip.
With op amp socket, you can exchange your favorite OP according to your needs to use different styles HIFI op amp. Currently, the output chip is original OPA2604 op amp.
Built power and signal indication on the front panel.
Adopted independent external Bluetooth antenna with high sensitivity.
Automatic doors to receive the first optical fiber, has a good dust-proof.
With an input switch to easy switch two input signals, Bluetooth and optical. The two inputs, Bluetooth + optical input, you can connect any digital device family.

a) Bluetooth module Bluetooth signals --- Bluetooth digital signal decoding --OPA2604 --AK4490 op-amp output

b) Fiber optic signal --- AK4490 decodes the received data --- OPA2604 op-amp output.

More details, please find IWISTAO Earphone Amplifier HIFI Solo with Bluetooth 4.0 CSR8670 32-bit DAC AK4490

If you want to know Bluetooth Decoder further, please find the blog

A HIFI Wireless Bluetooth 4.0 Decoder with CSR8670 and AK4490

Wednesday, June 8, 2016

A HIFI Wireless Bluetooth 4.0 Decoder with CSR8670 and AK4490

Currently more Bluetooth receivers had hit the market, but it just a Bluetooth receiver only that can receive and output signal quality is similar with CD level when its audio soucing is enough better like as lossless format.

Do you need more high solutiong wireless Bluetooth decoder? It should be better than those Bluetooth receiver. Now, we developed a Bluetooth Decoder, which is based on Bluetooth 4.0 CSR 8670 and DAC AK4490. It had been hit market.

CSR8670 is one of the most stable, best Bluetooth chip, supports APT-X transmission. And AK4490 is a new generation Premium 32-bit 2ch DAC with new technologies, achieving industry’s leading level low distortion characteristics and wide dynamic range. The AK4490 integrates a newly developed switched capacitor filter “OSR Doubler” that greatly reduces sound degradation from noise shaping, achieving a flat noise floor up to 200kHz. An innovative design technique utilizing a symmetrical layout for the left and right channels prevents signal quality deterioration, and a 32-bit digital operation block provides full 32-bit processing, making it capable of supporting wide range signals and achieving low out-of-band noise while realizing low power consumption. Moreover, the AK4490 has five types of 32-bit digital filters, realizing simple and flexible sound tuning in wide range of applications. The AK4490 accepts up to 768kHz PCM data and 11.2MHz DSD data, ideal for a high-resolution audio source playback that are becoming widespread in network audios, USB-DACs and Car Audio Systems.

It is a high performance 32-bit stereo DAC that achieves industry leading level performance of THD+N (-112dB) for a voltage output with 120dB dynamic range. It is a member of the Audio 4 ProTM family that adopts a newly developed VELVET SOUNDTM technology and is the flagship product of a new generation 32-bit premium DAC called VERITA series.

If do you think that the perfotmance of this Bluetooth decoder is far better than normal Bluetooth receiver? Actully, it is ture... The Bluetooth 4.0 version CSR8670 of the unit implemented digital signal transmission thought wireless function, the digital to analog conversion of audio output used a professional decoder chip AK4490 to play that the digital signal is decoded into an analog audio signal, and finally OP amplified the analog audio signal and output it.