That's really interesting. When I go from internal to external on the R26 it largely sounds the same. The main difference came when I switched up the cables. I was originally using an Amazon basics cable, but swapped it out for a Coherent 6D, which was a big improvement. I just left it at that but now that I've encountered this problem, I've noticed the lack of real difference in the sound by swapping between the two settings. I'm thinking the Basics cable was actaully causing a detrimental effect on the sound, that was fixed by using the 6D. But in terms of big upgrade in sound, not really hearing that.

My settings on the LB are Tony's settings that were posted here.
How to do I find the voltage? I haven't changed it since I purchased it so it's the out of the box setting.
Apart from the R26, I'm using a surface pro with local files via USB into a Mutec Mc-3+, which gave an obvious pronounced upgrade in sound, connected via AES cable into R26.
Using a Coherent 6D Gen2 BNC cable 1m.

With me I get more impact and a deeper soundstage and detail

A couple of small adjustments on moomalade PC and all  as it should be again

What plans?

You tease Tony.....I only ask,as last time we heard they where planning a firmware update in regards to the sleep function,that was a few weeks back, but heard nothing since.

Hello to you all on this thread . I have just joined the forum and this was the reason . I know TonyC from another forum and he advised me about the LB Clock . I took the chance of buying one as Tony had advised me before on changing the SMPS power supply on my Mutec MC-3 USB to an LPSU . Doing this had a very good uplift in sound quality with background noise and the real feeling to the music quite obvious .

As many of you will have realised very few DAC companies have an option for an external Word Clock the Gustard mentioned here being one and some dCS units another . Sadly the early model dCS Purcell / Delius pair I use do not have a clock input though you can make the Delius slave to the Purcell . However for those of you who would like to add an external clock there is another way but it is not that cheap . Good news it does far more than just let you add a clock The Mutec adds real quality to your digital chain (Tony does an upgrade which takes it even further but that is for another day) . I got lucky and bought mine off e-bay at £450 so not exactly cheap but in my view reasonable . I was delighted with what it did for the music in its standard form . LPSU added and things really sounded better . Then the addition of the LB Clock and wow the difference of this tiny unit is just untrue every piece of music sounds more real more lifelike and voices and inflections are easier to hear and understand Double Bass has depth and woodiness in its sound.

I originally bought a cheap 50 Ohm BNC cable from Pro Audio and this sounded really nice . I bought it as a stop gap as I had ordered a hand made 50 Ohm cable from Pickerings Limited . But lead time was five weeks so needed a stop gap . New cable arrived five weeks later and plugged it in . Left it there and did not think about it but after a few days noticed the system was a bit off and not as great as it had been . Changed back to the cheap BNC and wow the real music was back . I sent both these cables to Tony when he did my Mutec upgrade and he measured both the Pickerings one measured a little better but it was really close , Tony then said he was sure I would prefer the cheap one and he is right . So fully in agreement that mad as it sounds the clock signal cable does make a difference . I am looking to source some of H&S cable mentioned earlier in this thread so long as i can find someone to make up the cable for me and will give that a try . Once I get sorted will let you know how it sounds in my system .

I do get that lots of this is a bit too far for some in particular those who say measurements tell us everything , they are very likely right but we just often do not know what the right measurements are . Your ears are not being deceived an external clock like the LB make a difference and the settings are important . Narrowing the PLL using the sleep button can all change things . I get it because for me it seems obvious that digital files and transmission and manipulation is all down to time and how accurate that time is makes circuits and chips work less hard in not having to deal with wobbles and inaccuracy so the circuit stays is it best working window much more than when it is chasing a fixed time . This may be rubbish but it makes sense to me Digital as whole is all about timing and that not only means accuracy but stability as well and then the ultimate for music the reduction of noise.

Careful with your definitions, word clock and reference clocks are two different things.

The LB is a 10MHz reference clock and the Gustards etc. have a 10MHz reference clock input.

Some DACs (mostly pro) have a word clock input which changes frequency according to the data sample rate.

Great news...Thanks for the update Tony BTW Who's who in the photos?