[Paul Staples]

The 2pins above J4 are the power supply pins.

I misread this! - I thought you meant 2 pins higher up that are not part of the J4 cluster (4 pins). But as you know there are no pins above that J4 cluster of "4 pins". So, you must mean two pins within the J4 cluster, like this:

 

[Paul Staples]

I misread this! - I thought you meant 2 pins higher up that are not part of the J4 cluster (4 pins). But as you know there are no pins above that J4 cluster of "4 pins". So, you must mean two pins within the J4 cluster, like this:

I presume this is DC?
What voltage should it be please?

 

[Main Source]

Hello fellow audio enthusiasts,

Please indulge me as I have a few questions.
Does anyone here utilize the volume control on the LKS004 and not a pre-amp? I have my balanced outputs(XLR) plugged directly to a 2 channel amp(Marantz mm7025), which in turn power a pair of Bowers & Wilkins 705 S2's. Secondly each unbalanced RCA is going to an SVS SB-2000 subwoofer, left rca to one sub, right rca to the other sub.
Having bypassed my pre-amp the sound is so much better, its jaw dropping and the L.K.S. handles outputting all four signals beautifully.

Question 1: Should i be running a splitter to each sub's left and right input or just run the single rca cable to the lfe input .
Question 2:Should I be utilizing a crossover and could you point me to a simple one? My subs dont have speaker wire terminals to act as a pass through and im afraid that my B&W's are acting as large speakers, receiving the full signal.

Again it sounds great I'm just always looking to improve.

Thank you for your time.

 

[Paul Staples]

I am struggling with the amanero USB board and PSU. Can anyone tell me what the voltage is and whether it is DC?
whitigir, b0bb or anyone?

...many thanks!

 

[b0bb]

I presume this is DC?
What voltage should it be please?

5V DC

Measure those J4 points on both the PSU and USB boards.

 

[Paul Staples]

5V DC

Measure those J4 points on both the PSU and USB boards.

hi,
it measures 4.70 on the top and underneath (PSU top/USB bottom-underneath) removed from chassis.
Now what?
many thanks!

 

[b0bb]

hi,
it measures 4.70 on the top and underneath (PSU top/USB bottom-underneath) removed from chassis.
Now what?
many thanks!

That is borderline and may cause unreliable operation

Switch the multimeter to the AC range and measure, the AC voltage between the points of J1.
I expect it to be at least 7V AC

With the board outside of the DAC, it might to useful to double check by plugging the USB interface into the computer.
The link below is a windows USB viewer utility from NirSoft.
Take the listing before and after you plug in the board, the Amanero USB board will show up on the list if it is working.

https://www.nirsoft.net/utils/usb_devices_view.html
64bit version: https://www.nirsoft.net/utils/usbdeview-x64.zip

 

[Paul Staples]

That is borderline and may cause unreliable operation

Switch the multimeter to the AC range and measure, the AC voltage between the points of J1.
I expect it to be at least 7V AC

With the board outside of the DAC, it might to useful to double check by plugging the USB interface into the computer.
The link below is a windows USB viewer utility from NirSoft.
Take the listing before and after you plug in the board, the Amanero USB board will show up on the list if it is working.

https://www.nirsoft.net/utils/usb_devices_view.html
64bit version: https://www.nirsoft.net/utils/usbdeview-x64.zip

hi,
the AC reading is 7.4v. don't forget the DC measurement could have DMM inaccuracy.
do you mean me to use the USB board on its own or still plugged into the PSU board please?

many thanks!

 

[b0bb]

hi,
the AC reading is 7.4v. don't forget the DC measurement could have DMM inaccuracy.
do you mean me to use the USB board on its own or still plugged into the PSU board please?

many thanks!

Keep the board powered while doing the windows test.

If your DMM has less than 1% accuracy, get a better unit.

 

[Paul Staples]

Keep the board powered while doing the windows test.

If your DMM has less than 1% accuracy, get a better unit.

what should I look for in the nirsoft app. window please? (what details/description/title?)...
screenshot:



many thanks!

 

[b0bb]

what should I look for in the nirsoft app. window please? (what details/description/title?)...
screenshot:

Amanero's Vendor ID is 16d0.

Is the USB interface plugged into the PC and the red led on the PSU board glowing ?

 

[Paul Staples]

Amanero's Vendor ID is 16d0.

Is the USB interface plugged into the PC and the red led on the PSU board glowing ?

what I did was: plugged one end of a usb cable into the laptop, then plugged the other end into the amanero usb board. The 4 pins between the boards were pressed firmly together and the PSU board's light was glowing red. I hope that is what you meant?
That vendor ID is not on the list as you can see. I did refresh a few times as well and tried with different usb cables also.
Many Thanks!

 

[b0bb]

what I did was: plugged one end of a usb cable into the laptop, then plugged the other end into the amanero usb board. The 4 pins between the boards were pressed firmly together and the PSU board's light was glowing red. I hope that is what you meant?
That vendor ID is not on the list as you can see. I did refresh a few times as well and tried with different usb cables also.
Many Thanks!

Is the the first time you used the USB interface?

The USB board is likely faulty as the USB root hub on the PC is not detecting it.

 

[Paul Staples]

Is the the first time you used the USB interface?

The USB board is likely faulty as the USB root hub on the PC is not detecting it.

Hi,
yes this is the first time I have tried it on the USB. I've been using coax and i2s up to now, for over a year! But I got a rendu cheap which is USB, just to compare to my DIY HTPC.
BTW: the behaviour of that output isn't the same as the others! i.e. the usb stays LOCKED all the time, whereas the others unlock when they are unplugged; is that normal?
Many thanks again, looks like you have helped me to unearth a fault!

 

[b0bb]

Hi,
yes this is the first time I have tried it on the USB. I've been using coax and i2s up to now, for over a year! But I got a rendu cheap which is USB, just to compare to my DIY HTPC.
BTW: the behaviour of that output isn't the same as the others! i.e. the usb stays LOCKED all the time, whereas the others unlock when they are unplugged; is that normal?
Many thanks again, looks like you have helped me to unearth a fault!

The USB interface reports unlocked if it is working correctly.