Entreq Tellus grounding

[Barry2013]

My Vitus SIA 025 is grounded to my Poseidon via an input on the amp and the other two terminals are used for the negative speaker terminal grounding.
I find it very effective and can certainly recommend it.

 

[Tecknik1]

Thank you Barry. I have read the entire thread and don't recall you or anyone specifically saying they had both inputs and speaker negatives hooked up, I currently only have the inputs connected and can only imagine what both would due to the SQ. Did you due both inputs and negatives at the same time or one at a time?

If you had to choose one which would you choose " inputs or speaker negatives ?

 

[Barry2013]

Hi Tecknik
The amplifier was input grounded before I did the negative speaker terminal grounding. The addition of negative speaker terminal grounding took place afterwards when I got the Poseidon. The negative speaker terminal further reduced the noise floor and lifted veils. I have not tried doing only the negative speaker terminal grounding on my system so can't really say which is best if only one option is available. It may also be system dependent.
If both cannot be done immediately I think the best plan is to try both options and see which works best in your system but you will need really to allow 24-48 hours between the two options as the earth cables need that sort of time to settle in properly.

 

[Tecknik1]

Hi Barry, thats the only downfall if you could call it that in that it takes 24-48 hrs and everyday it gets better and better. I first started off with the silver tellus like so many on this thread recommends but quickly returned that and upgraded to the Poseidon and Olypmus Minimus. To try both at the same time I would have to disconnect my Dac which I don't think would be a forward move, source first down which means Im going to have to play with inputs or negatives like you mentioned to see whats the most beneficial for my system.

 

[Barry2013]

Good luck!

 

[Tecknik1]

I ordered the grounding cables from negative speaker terminal to the Poseidon' my question is has anyone actually done this on a Accuphase amp ? I have emailed Accuphase and didn't receive a response, emailed Stillpoints and Paul recommended I ask here at WBF.

I certainly want to know before doing so.

 

[Tecknik1]

I ordered the grounding cables from negative speaker terminal to the Poseidon' my question is has anyone actually done this on a Accuphase amp ? I have emailed Accuphase and didn't receive a response, emailed Stillpoints and Paul recommended I ask here at WBF.

I certainly want to know before doing so.

 

[Barry2013]

I am not aware of any problems with negative speaker terminal grounding on Accuphase amps but I don't know any Accuphase owners.
Their design is pretty orthodox and it is only the more unusual designs like Dave Berning amps which are not suitable.
I suggest you email Entreq who should be able to reassure you.

 

[Tecknik1]

Thanks Barry I will email them.

 

[caliaripaolo]

Thanks Barry I will email them.

I do not see any issue!!
You have to be care to: not short positive terminals.
Use to connect 1 amplifier negative terminal with 1 binding post of Poseidon (do not mix the 2 negative terminals fo amplifier to the same binding post of Poseidon).
Do not connect other components of your system to the binding posts used to ground the negative terminals of amplifier.
Hope this help.

 

[nonesup]

Attention to the owners of Constellation amplifiers. I thought of connecting the nagative terminals to two Silver Minimus boxes. I wrote to Constellation and was told that due to the "Balanced Bridget design" of its amplifiers, damage would occur.

 

[Barry2013]

Thanks for that information.
Good to know.

 

[Fiddle Faddle]

Attention to the owners of Constellation amplifiers. I thought of connecting the nagative terminals to two Silver Minimus boxes. I wrote to Constellation and was told that due to the "Balanced Bridget design" of its amplifiers, damage would occur.

I am struggling to understand by what mechanism damage might occur. Not saying they are incorrect of course, just that I have difficulty comprehending the rational behind it.

 

[nonesup]

I am struggling to understand by what mechanism damage might occur. Not saying they are incorrect of course, just that I have difficulty comprehending the rational behind it.

Hi.
This is the mail that Irv Gross sent me, after consulting the technical department:

Hello Francisco,

Our technical department replied:

On our amplifiers the (-) binding post is not at GROUND potential, it sits at a negative voltage below ground by the same amount as the (+) phase output sits positive above ground. Only the CHASSIS of the amplifier is GROUND. The left and right (-) posts are NOT to be connected to each other or to ground or the chassis EVER. Just like you would not attach the left and right (+) posts to each other or ground, do not do it to the (-). Doing anything like this to any of the outputs SHORTS the amplifier out and can DAMAGE it.



Best regards,

Irv

 

[microstrip]

Hi.
This is the mail that Irv Gross sent me, after consulting the technical department:

Hello Francisco,

Our technical department replied:

On our amplifiers the (-) binding post is not at GROUND potential, it sits at a negative voltage below ground by the same amount as the (+) phase output sits positive above ground. Only the CHASSIS of the amplifier is GROUND. The left and right (-) posts are NOT to be connected to each other or to ground or the chassis EVER. Just like you would not attach the left and right (+) posts to each other or ground, do not do it to the (-). Doing anything like this to any of the outputs SHORTS the amplifier out and can DAMAGE it.



Best regards,

Irv

Most probably people from Constellation Audio do not know what the Silver Minimus boxes really are. As soon as they read "ground" they think about a low resistance connection and immediately tell users "DON'T DO IT"!

If you are using two separated isolated boxes, each connected to its negative post, you will not have problems.

 

[Barry2013]

That makes sense to me microstrip.
nonesup you may like to consider checking with Entreq in the light of the above

 

[nonesup]

Oh, I consult with Sven from Entreq, and he thinks there will be no problem.
I also think, maybe in Constellation, confuse the devices like Entreq Silver with others like the Troy, that they do connect to power,
but .............. who risks " Fry "your amplifier?

 

[Speedskater]

As soon as they read "ground" they think about a low resistance connection and immediately tell users "DON'T DO IT"!
........................................

Yep! "ground" to any good engineer always means 'common reference point' and often a specific reference. Grounds always have two or more connections (can't be common without at least two).

 

[elescher]

Attention to the owners of Constellation amplifiers. I thought of connecting the nagative terminals to two Silver Minimus boxes. I wrote to Constellation and was told that due to the "Balanced Bridget design" of its amplifiers, damage would occur.

As stated in a previous post, I have the Centaur amplifier with two Silver Minimus' hooked to Neg. L&R channel. NO ISSUE. I am listening as I write this.

 

[caliaripaolo]

Hi.
This is the mail that Irv Gross sent me, after consulting the technical department:

Hello Francisco,

Our technical department replied:

On our amplifiers the (-) binding post is not at GROUND potential, it sits at a negative voltage below ground by the same amount as the (+) phase output sits positive above ground. Only the CHASSIS of the amplifier is GROUND. The left and right (-) posts are NOT to be connected to each other or to ground or the chassis EVER. Just like you would not attach the left and right (+) posts to each other or ground, do not do it to the (-). Doing anything like this to any of the outputs SHORTS the amplifier out and can DAMAGE it.



Best regards,

Irv

Yes, Constellation amplifiers are balanced type. Usually one of the main scope to use balanced based projects is to eliminate noise coming from chassis ground.
but there are not active components into Entreq ground boxes, so I do not find any issues to use groundboxes on balanced type of amplifiers.
Maybe could be a contradiction to add something that can add a potential noise to a balanced amplifier, which is completely disconnected to chassis ground throughout all the signal path.