Recent content by tom.chen

yes,you are right.

At present, the jumper of SA-1 has not been removed. Jumpers are used for testing. We do not recommend using DC Direct couple. Although SA-1 also has stable and safe DC protection circuit.

In the high resistance mode, the control power of the diaphragm will decrease, so the low frequency will be enhanced.

yes,Single ended turn to balance, there will be an additional 6dB gain.

The sensitivity of AKG K1000 is only 74db

By default, SA-1 is in low gain mode. If you need to drive headphones, it is recommended to use high gain mode. You may need to read the instructions. When we use the high gain mode on the decoder SDA6-PRO (4.6V RMS output) to balance the input and output, we can even push AKG K1000 headphones.

In any case, we don't recommend to use internal DC coupling, this is only for our test. We will consider removing this DC socket in the future. There are only 4 amplifiers inside, and the three output sockets 6.35 4.4 XLR are all connected together.

Thank you for your encouragement, we will work hard to design more new products. Thank you all for your attention.

TI 's OPA1612

We will design a better single-ended amp, better than your L30. pls waiting ,and look a look. HAHA

Thank you very much for the review of amirm. SA-1 uses op amps from TI and the transistors from ON Semiconductor. The 4 code switches at the bottom are from ALPS. We test every ALPS potentiometer to meet our requirements.

In fact, I am the designer of SA-1 from Singxer. I am very happy that everyone is interested in SA1. The design ideas of SA1 are different from other manufacturers; Balance the input and output for maximum performance. SA1 is based on a fully balanced design, from input to volume control...

More details, from Singxer's Taobao： Large balanced output power: 16Ω 10000mW 32Ω 5500mW 68Ω 3100mW 120Ω 2000mW 600Ω 380mW Single-ended power: the corresponding balanced output power divided by four. SA-1's Class A model: Balanced 16 ohm load: below 500mw; Balanced 32 ohm load: below 1000mw...

Regarding the CE and FCC issues, I consulted singxer, and the manufacturer responded that it is already applying for certification. It is expected to pass in May.

It's ROM's triode, not op amp. The SA-1 should use transistors, not tubes.This should be a software translation error.