BTW do you guys use any device for switching the phase? SL-2 doesn't have that function, it would come in handy sometimes.
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Double Bass Anyone using a Troll with AI Clarus SL?
- Thread starter fasternak
- Start date
Well, shoot. It appears you’re right. Waitimg for confirmation from Triton. But it appears XLR/TRS cables are not phantom power friendly. 1/4” plug is not built for it - or so it seems. If this correct then it surprises me how many people on the retail side of the fence recommended using the FH with the Clarus SL-2 - an amp sans XLR inputs. Perhaps I’m still missing something here.
TRS connectors usually don‘t deliver phantom power, XLR usually can deliver phantom power (if switched on).
If that's so, what's the point of having an option for phantom power in the SL-2?
Wrote to Triton. No response. The mic pre alternative was noisy. So I sent the FH back for refund. The Troll Clarus SL-2 combo is performing well without the FEThead. But I continue to wonder why the FH functions via XLR/XLR with a mic pre but does not with XLR/TRS cables on this amp. Perhaps the Clarus (10ma) is not providing enough current to power the FH adequately. This is what Rick Jones (AI) suggested.
I think there is a norm about phantom power including specs for current.
Theoretically phantom power can work with TRS-connectors, but maybe plugging in and out can short circuit the power (which as far as I remember) should not be a problem due to the typical schematic.
But a TS plug in a phantom powered TRS jack does short circuit the phantom power. Maybe that is the reason why TRS jacks with phantom power are hard to find at all.
I have a small digital mixer from KORG with eight inputs. Two mic-level XLR with phantom power, two mic-level TRS without phantom power and four line-level (mic-level?) T(R?)S, of course without phantom power.
I think there is a reason why the TRS jacks don’t get phantom power.
Theoretically phantom power can work with TRS-connectors, but maybe plugging in and out can short circuit the power (which as far as I remember) should not be a problem due to the typical schematic.
But a TS plug in a phantom powered TRS jack does short circuit the phantom power. Maybe that is the reason why TRS jacks with phantom power are hard to find at all.
I have a small digital mixer from KORG with eight inputs. Two mic-level XLR with phantom power, two mic-level TRS without phantom power and four line-level (mic-level?) T(R?)S, of course without phantom power.
I think there is a reason why the TRS jacks don’t get phantom power.
Received email from Erwin at Triton today. He’s checking to see if Clarus and FEThead share share common phantom cable wiring scheme. And, yes, an XLR TRS cable does pass phantom power from the Clarus SL-2 to a condenser mic. My Line Audio CM3 works fine with Clarus. It follows, I have a growing suspicion that the FEThead and Clarus address the XLR TRS cable differently. I’ll find out soon.
There is not much what can happen unless the ground is connected wrong on the XLR side (I doubt there is that kind of error on the TRS side unless the maker is really dumb).
Exchanging hot and inverted doesn‘t influence phantom power, it only gives an inverted phase signal.
A lower voltage phantom power can make problems but if the voltage and current are inside the phantom power specs there should not be a problem.
All if there is not a mistake inside the amp swapping ground and one of the signal lines. (But I doubt that happens with a TRS jack.)
Voltage and Current are in agreement. All I can say is Erwin (Triton) wanted me to ask Rick at AI how the TRS addresses XLR. Rick wrote: The phantom voltage is applied between the tip and ring of the TRS jack. We’re treating the tip as if it was pin 2 on the XLR. The ring is pin 3 of the XLR.’ Does this agree with your thinking, DoubleMidi? BTW, hope you understand this AI amp directs 48v 10ma phantom power to TRS jacks. It does not have XLR inputs.
I’m about to let this issue go. I must be annoying a lot of people this.
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If the phantom power (+48 volts) goes on hot (+) AND inverted (-) then it is OK.
Phantom power goes on both lines so that variations of the phantom power voltage have minimum influence on the signal after balancing.
For PIN numbers and function I need to look up myself every time I solder an XLR connector to avoid errors.
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Apologies. This really means nothing to me because I don’t make my own cables. I’ll post the solution here if and when I get one. Thank you for your help.
