[tomjacob]

So the 15v sbooster is fine for mscaler and tt2 thanks

Yes mate. Just make sure when you receive the s booster it's set on 15 volts before you connect it to the Chord. I'm sure you will be OK but there is some right idiots out there

 

[seaice]

In the TT2 manual (page 21), it is said: "Please do not connect both XLR & RCA to amplifiers simultaneously, this will damage TT 2"

What exactly does it mean? I think there are at least two possible interpretations:

Interpretation one: "... do not connect both XLR & RCA to two amplifiers simultaneously... "
(i.e. XLR outputs to one amplifier and RCA outputs to another)
...or/and...
Interpretation two: "... do not connect both XLR & RCA to the same amplifier simultaneously... "

Which one is correct? Or both?

And what about other options (e.g. one XLR and one RCA output to one amplifier and the second XLR and RCA output to another, etc.)?

 

[AnyDave]

In the TT2 manual (page 21), it is said: "Please do not connect both XLR & RCA to amplifiers simultaneously, this will damage TT 2"

What exactly does it mean? I think there are at least two possible interpretations:

Interpretation one: "... do not connect both XLR & RCA to two amplifiers simultaneously... "
(i.e. XLR outputs to one amplifier and RCA outputs to another)
...or/and...
Interpretation two: "... do not connect both XLR & RCA to the same amplifier simultaneously... "

Which one is correct? Or both?

And what about other options (e.g. one XLR and one RCA output to one amplifier and the second XLR and RCA output to another, etc.)?

I think it means using RCA or XLR when using the TT2, but not both at the same time. At least that's the safe route. In other words, one connection to one amp.

In my case, I use an RCA switcher for different amps, which has been fine.

 

[Francisco Evangelista]

In the TT2 manual (page 21), it is said: "Please do not connect both XLR & RCA to amplifiers simultaneously, this will damage TT 2"

What exactly does it mean? I think there are at least two possible interpretations:

Interpretation one: "... do not connect both XLR & RCA to two amplifiers simultaneously... "
(i.e. XLR outputs to one amplifier and RCA outputs to another)
...or/and...
Interpretation two: "... do not connect both XLR & RCA to the same amplifier simultaneously... "

Which one is correct? Or both?

And what about other options (e.g. one XLR and one RCA output to one amplifier and the second XLR and RCA output to another, etc.)?

Hi, both are correct you shouldn’t not use RCA or XLR both Connected . To my understanding both connections draw for the same place and could be to much for the TT2 …

I had the same question , even if you have both connected but use just one at a time , it’s not advice to do so… but know that some use it like this and didn’t had problems…

 

[jarnopp]

In the TT2 manual (page 21), it is said: "Please do not connect both XLR & RCA to amplifiers simultaneously, this will damage TT 2"

What exactly does it mean? I think there are at least two possible interpretations:

Interpretation one: "... do not connect both XLR & RCA to two amplifiers simultaneously... "
(i.e. XLR outputs to one amplifier and RCA outputs to another)
...or/and...
Interpretation two: "... do not connect both XLR & RCA to the same amplifier simultaneously... "

Which one is correct? Or both?

And what about other options (e.g. one XLR and one RCA output to one amplifier and the second XLR and RCA output to another, etc.)?

I agree it’s best not to do this either way, however, there was this post indicating it shouldn’t be a problem:
https://www.head-fi.org/threads/hug...official-thread.879425/page-383#post-14997040

 

[miketlse]

@ Rob Watts
Are you able to provide the current 'best practice' view regarding the previous recent posts?

I recognise that Chords advice may partly be intended to prevent owners repeating previous mistakes from a few years ago, where TT2 owners tried to drive their TT2s too hard, resulting in burnt out components in the amp stages.
However there are posts from several owners describing how they successfully use both XLR & RCA in parallel, but with one of them being used to provide the input to an active subwoofer.
A simple search of this thread using the search term 'subwoofer' provides a list of examples of them.

Would Chord now be unhappy for owners to use one of the TT2 outputs to drive active subwoofers?

 

[Rob Watts]

I think this advice came about as a number of completely crazy pre-amps and amps short unused inputs or short them when powered down. Running TT2 continuously into a short can damage it, as TT2 is capable of delivering 4A (and much more than this dynamically).

Driving amps and subwoofers at the same time, with both powered up, is safe, so long as TT2 OP is never being shorted.

 

[miketlse]

Thanks Rob, that will clarify the situation for some owners.

 

[GuiltyRocker]

Thanks Rob, that will clarify the situation for some owners.

One of the few designers that I see responds to people, I have deep respect for Rob.

 

[Jawed]

I think this advice came about as a number of completely crazy pre-amps and amps short unused inputs or short them when powered down. Running TT2 continuously into a short can damage it, as TT2 is capable of delivering 4A (and much more than this dynamically).

Presumably newer designs can include the capability to detect a short circuit and show an error status to the user.

 

[tomjacob]

DCS is on fire bringing out some great products recently. I hope Chord can do the same with the dacs. DCS has the Lina system dedicated to headphones. Chord need to design the next Dave with that in mind. Having to choose the Hugo tt2 over the Dave just because it drives headphones better is back to front

 

[Thorsten Loesch]

The mechanism is that the impedance of each end of the cable is different and that this varies with frequency. With mismatching the cable is effectively "tuned"...

Many digital cables have a pair of ferrites on them, one at each end, specifically to minimise mismatched impedances.

That is not how ferrites work, sorry. With all the cable structures we can create that work as intended ferrites ONLY affect the common mode impedance, which applies to conducted/received interference. While differential mode impedance (which applies to the signal and differential mode noise) remains unchanged by ferrites.

I'd really like to see the technical article that makes different claims.

Thor

 

[Jawed]

I'd really like to see the technical article that makes different claims.

There's plenty of other videos which are also worth watching on this channel.

 

[Thorsten Loesch]

There's plenty of other videos which are also worth watching on this channel.

Yes, he is commenting on COMMON MODE RF CURRENT, not the actual signal passing through the cable and on the the ability of the cable (shield) to act as transmitting antennae for this current. (small edits for clarity)

Thor

 

[Jawed]

Yes, he is commenting on COMMON MODE RF CURRENT, not the actual signal passing through the cable and the ability of the cable (shield) to act as transmitting antennae.

Good, you admit you were wrong:

Ferrites on cables add COMMON MODE impedance and by their nature ferrites are well damped, or more precisely lossy (need to.be to their job) so neither noise nor signal can be amplified by adding ferrites.