Exciting times :) !!   I have ordered my 1st run of cards at PCBway pick and place ! 

Here are my 1st ever professionally manufactured boards :) 

There are only 10 cards , but the parts are not cheap ! 

https://www.pcbway.com/assembly-process.html did an amazing job here guiding me through the world of having a correct BOM ( bill of materials ) and checking everything from part orientation to proper part / footprint matching !

They part sponsored the project by reducing the pick n place / manufacture cost by 50% which was really helpful. This is not why I am writing a positive review about them though. I am free to write what I want here !

They really did have a ton of patience with me and my stupid mistakes on this. I can't recommend you use this service enough if you have never had a board professionally manufactured. You can send your own parts or have them source the parts locally. some parts I had to send them as they are difficult to source in China due to the current situation. but its easy to send parts directly to them.

On this version of the preamp I have VCOM from ADC coming in through the connectors.

I also reduced the size of the phantom blocking caps as it was taking to long to drain them and causing problems with the PGA2500. The lower value 22uF blocking caps should slightly increase bass filtering slightly but so far I can't tell the difference from using these or the 47uF blocking caps. apart from the faster drain time when phantom power is switched off. When phantom power is switched off or on the DSP mutes the inputs for 1 second in case of large banging noise etc. this time was reduced using the smaller blocking caps.

I need to glue the caps onto the PCB myself but I opted to do this myself to save time.

As you can see the solder reflow is really nice !!! especially on the PGA2500 and OPA1637

diode protection on rear for power protection and phantom power short protection

One thing I can say , using KiCad you often just choose a generic symbol / footprint for resistor or capacitor etc and have in the back of your mind what actual part you will use. this is really bad practice since when you output your BOM there are to many empty holes as far as manufacturing are concerned. it might be just a 10k 0603 resistor to you , but they need to know exactly what part to order for you !!!!! its so easy to overlook when outputting a BOM ! worse still a really bad habit of mine is to just use say a resistor footprint for say a capacitor or ferrite bead !! don't do it !! you will forget and the factory could easily choose the wrong component.

Anyway , thanks to PCBway they fixed my stupid mistakes and got me some really nice working preamps for the BBBOX mixer recorder.

here's a few pics of a card inserted ! 

note , FPC cables to ADC/DAC card and ext connectors to :)