Mr.Sneis
Headphoneus Supremus
- Joined
- Feb 5, 2004
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XLR basically just gives the amp with lower gain more headroom and brings the benefit of higher slew rate. Other than these two... I don't think there is any more potential benefits worth mentioning.
I'm no expert, but yeah XLR do deliver twice the voltage (louder.) The distortion; however, shouldn't be effect. It hard to actually tell the volume by ear; hence, the need of equipments.
Not fimiliar with 006t's schematic at all, but here is one possibility which is very remote.
the "-" channels of the amp has some problem that's causing the distortion. When using single ended, those "-" channel inputs are shorted to ground, so you most likely won't hear the problem.
Wait for Spritzer for more detailed diagnosis.
Quote:
win.
XLR output is usually double that of RCA but it's not a rule. It's certainly in this case and as for the distortion, more input voltage will not help with the natural limitations of the amplifier. The 6CG7's will run in trouble with higher voltage (i.e. more volume) and the double input voltage only gets you there quicker. It's a good circuit hampered by a tube that can't stand the 700V it's asked to work at.
I know that higher input voltage will just push the amp to higher distortion faster.
but shouldn't the distortion of XLR be of the same maginitude of RCA, if the final output dB on the headphone are set to the same level?
(Not particularly familiar with how tubes work. I'm assuming that it works somewhat like a transistor.)
The D/AC1500 should be a fully balanced source so you should be technically better off via XLR; the clipping you are describing I can't really answer for but is interesting. Speaking of the D/AC 1500 - how do you feel it fares sonically? Maybe my ears are broken but I haven't found great synergy with any of my other amps and the Parasound yet.
too bad so much of it is wrong
I though his response was clear enough. Distortion mainly comes from the output stage and it doesn't matter if the signal reaching was from xlr or unbalanced inputs, the output stage clips above a certain input signal level. Depending on the amp design (and hence gain settings) this may happen at same or different volume setting of the potentiometer, but it to occurs at the same loudness level since it relates to the output stage linearity.
Next step: a big battery pack to go fully mobile.
(...) I have a lot of empty room in my bag.
If the SRM-Xh takes the same input as a 252, namely 12V, that would put it in car battery territory.So much for mobility though...
Seriously, you would have to hook up some batteries in series to get 12V, for example 8×1.5V, find and buy the same connector as on the adapter, connect it via a wire to the batteries, while observing polarity, and you should be set.
Most Stax amps do not use regulated PSUs.
I have a question about the difference between the XLR and RCA inputs on my SRM-006t. The 006t has two inputs, one is RCA only, the other is selectable between RCA and XLR. I currently have my Parasound 1500, which I can hookup using either connection (using Monoprice cables, and SR-007s FWIW).
When I listen via XLR I find the sound to be considerably louder. Am I correct in assuming this is because XLR delivers twice the voltage of RCA? I cannot, however, discern a sonic difference between RCA/XLR.
More importantly, if I listen at high volumes, I find that that the amp begins to distorts at the same overall sound level using either XLR or RCA (i.e. not the same setting on the volume dial, but the same sound level at my ears). Put another way, using XLR does not seem to give me any more 'headroom'.
Are my experiences consistent with the engineering of these amps, or have I missed an important step somewhere? I am trying to better understand the benefits of using the XLR inputs, so I can decide how to proceed with future purchases. Thanks!