Hi Sonny,
Will the new firmware support the Mirand DAC v1.0 with display and preamp? If the preamp is not supported yet, will it work with just the DAC v1.0 and the Oled display?
Thanks
Do
Will the new firmware support the Mirand DAC v1.0 with display and preamp? If the preamp is not supported yet, will it work with just the DAC v1.0 and the Oled display?
Thanks
Do
MIRAND A1 V12 THD
Attached is a waveform i just did of the Mirand A1 V12 for 27W into 8R.
Have a good evening everyone.
Attached is a waveform i just did of the Mirand A1 V12 for 27W into 8R.
Have a good evening everyone.
Regarding the DAC V1.2 i have made some changes to the oscillator because it was simply not good enough.
I have added low pass filtering on the powersupply and i am going to give the oscillators there own ground reference today because they sit on top of the U43 44 TQFP (Shown in the attached picture).. And i am sure that is the source for the problems.
So later today i will upload a picture of the same position showing the ground plane for the oscillators.
I have added low pass filtering on the powersupply and i am going to give the oscillators there own ground reference today because they sit on top of the U43 44 TQFP (Shown in the attached picture).. And i am sure that is the source for the problems.
So later today i will upload a picture of the same position showing the ground plane for the oscillators.
Attachments
More MIRAND A1 V1.2 Measurement.
They are done with 25mA bias. 10mV across the measurement points.
They are done with 25mA bias. 10mV across the measurement points.
MIRAND A1 V1.2 Manual
We have attached a Dropbox link to the MIRAND A1 V1.2 Manual:
Dropbox - Mirand A1 V12 Manual.pdf
We have attached a Dropbox link to the MIRAND A1 V1.2 Manual:
Dropbox - Mirand A1 V12 Manual.pdf
Very nice Sonny!
But could you please chect the trimming procedure again?
I can not find Trimmer R22 and R21 on the pcb. Maybe you mean just R4?
But could you please chect the trimming procedure again?
I can not find Trimmer R22 and R21 on the pcb. Maybe you mean just R4?
Yes i have code, but have an issue with firmware upgrade over USB for users.
I have hopefully a fix today... I will keep posted today.
I have hopefully a fix today... I will keep posted today.
Hi Sonny,
I would like to inform I have clear PayPal payment for AK4493 dac with extra aes board. I have not received reply from you yet so just a reminder in case you miss your inbox.
Thank you.
I would like to inform I have clear PayPal payment for AK4493 dac with extra aes board. I have not received reply from you yet so just a reminder in case you miss your inbox.
Thank you.
Hi Sonny,
Thanks for the manual for A1 V12, it is very useful. Just to be sure, the trimming procedure described in the manual uses J21 and J22 for measuring, but the drawing shows J21 and J23. Which one is correct?
Erik
Also what is going to be updated this week is information on the Balanced preamp that will be changed to use gain modules that we also uses for the DAC.
BR
Sonny
BR
Sonny
Delivery time and prices
I got asked today how thing looks like regarding delivery.
Updated USB DAC V1.2a with new clock domain and AK4493 (Minor changes need for the AK4493): We will receive 20 boards (7 sold, 13 left) board week 42 shipment week 43.
New/modified Gain Module : We have 28 pcs left but we will receive 40 boards (30 sold, 38 left) in week 42. So shipment in week 43
Shield board for the discrete output stage : 1 in stock, We will receive 20 boards (8 sold, 13 left) week 42 shipment week 43
New Balanced Preamp (which will be changed to use gain modules that we also use for DAC) : We will receive 20 boards (3 sold, 17 left) Delivery week 42 shipment week 43
MIRAND A1 V1.2 amplifier : 44 boards in stock, 4 sold, extra 10 ready to ship.
Gain module : 80€/pcs
Modification of old gain modules : 20€/pcs
Shield board with 2 x gainmodules for SE: 160€ (Shield for free)
Shield board with 4 x gainmodules for XLR: 320€ (Shield for free)
USB, SPDIF, I2S DAC Board AK4493 DAC V1.2a : 426€
USB DAC Board AK4493 DAC V1.0a : 199€
Preamp with 6 gainmodules : 520€
MIRAND A1 V1.2 : 199€/channel
I got asked today how thing looks like regarding delivery.
Updated USB DAC V1.2a with new clock domain and AK4493 (Minor changes need for the AK4493): We will receive 20 boards (7 sold, 13 left) board week 42 shipment week 43.
New/modified Gain Module : We have 28 pcs left but we will receive 40 boards (30 sold, 38 left) in week 42. So shipment in week 43
Shield board for the discrete output stage : 1 in stock, We will receive 20 boards (8 sold, 13 left) week 42 shipment week 43
New Balanced Preamp (which will be changed to use gain modules that we also use for DAC) : We will receive 20 boards (3 sold, 17 left) Delivery week 42 shipment week 43
MIRAND A1 V1.2 amplifier : 44 boards in stock, 4 sold, extra 10 ready to ship.
Gain module : 80€/pcs
Modification of old gain modules : 20€/pcs
Shield board with 2 x gainmodules for SE: 160€ (Shield for free)
Shield board with 4 x gainmodules for XLR: 320€ (Shield for free)
USB, SPDIF, I2S DAC Board AK4493 DAC V1.2a : 426€
USB DAC Board AK4493 DAC V1.0a : 199€
Preamp with 6 gainmodules : 520€
MIRAND A1 V1.2 : 199€/channel
The new gain modules
Sonny has upgraded my gain modules, and there are really better than the old ones, which I loved. I have had them for almost a week, and they did really open up, after a few days. In short terms I would say, that they sound more analog. The top is has much more definition, and soft at the same time. And their perspective has grown a little. And they sound has got a little more body.
So well done Sonny 🙂
Sonny has upgraded my gain modules, and there are really better than the old ones, which I loved. I have had them for almost a week, and they did really open up, after a few days. In short terms I would say, that they sound more analog. The top is has much more definition, and soft at the same time. And their perspective has grown a little. And they sound has got a little more body.
So well done Sonny 🙂