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Showing 1 of 50 conversations about:
Rotary_Transformer
10
Jun 19, 2020
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Can anyone bought it tell me if the XLR and 6.35 ports are connected? I saw ASR's review said the XLR headphone ports is fake-balanced, it only gives ground in negative pins.
Dmac6419
194
Jun 19, 2020
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Rotary_TransformerYou get the same power from both,for $266 don't hesitate buy it,worry about a true balanced amp later,this thing will drive anything headphone wise.
Rotary_Transformer
10
Jun 19, 2020
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Dmac6419Thank you! In this case, I would rather buy the schiit.
Rotary_Transformer
10
Jun 19, 2020
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MalinMAGNI HERESY, it's only $99 and has the same power.
Dmac6419
194
Jun 19, 2020
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Rotary_TransformerI don't think it has the same power, your money your choice
Malin
66
Jun 21, 2020
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Rotary_TransformerI have to pay $172 to get it in Europa where it has been out of stock for months. sp200 is on sale right now for $265.99.
Rotary
0
Jun 22, 2020
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tony18moIf you checked the price on 6.18, with the promotion, it was around 1400 rmb. Additionally, smsl lists the price 1399 rmb each on Alibaba, and saled 1113 rmb each most recently. Which means if you go for it in offline stores, it will be less than 1400rmb.
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Oliver11
18
Jun 26, 2020
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Rotary_TransformerI just upgraded to this from a Schiit Magni 2 Uber. I can say that this blows the Magni out of the water in terms of sound quality. It really brought life to my HD6XX that I just didn't get from the Magni.
ElectronicVices
2937
Jul 13, 2020
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Rotary_TransformerWell no 4 pin XLR is going to be "truly" balanced but that is a different conversation. This uses the 888 which can handle mono duties per module, so two are needed to perform stereo duties, 4 would be needed to run balanced. The 788 module that Drop incorporated is a stereo module so differential operation is possible there with only two modules. In SE you aren't using all the modules on the THX but you are in XLR output. On the SP200 both 888 modules are active regardless of SE vs. XLR so there is no difference in power delivery, just connection type. The CTH from Drop also provides XLR for convenience, no difference in TRS vs XLR output.
(Edited)
Rotary_Transformer
10
Jul 13, 2020
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ElectronicVicesWe didn't discuss about "true" balance. The XLR4 output in SMSL SP200 is naively shorted on the cold end (negative poles), which is a fake balanced output port.
Additionally, you may check the datasheet, THX789 gives double power in balanced output than signal end, and it's around 2x than SMSL SP200. SP200 is slight higher on SE of THX789 due to it uses a +-18V power supply and THX789 uses a +-14V.
(Edited)
Shahoff
49
Nov 10, 2020
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Rotary_TransformerDid you measured that 2 legs of XLR output are connected to other via ground ? Did you measure ?
THX is not really "module" , its reference design. And looking at the components I can see two OPAs both dual
OPA1612A and OPA564A
with two transistors on output on each. Just thinking if its even possible to short one shoulder to the ground with such design.
Also according to 564A specs , one of OPA inside providing aprox 1.6W of power on 32ohm with 14V power input and two ( entire chip) in bridge mode will give you aprox 3W what is in the specs of SP200.
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Rotary_Transformer
10
Nov 10, 2020
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ShahoffIf you are familiar with circuit, one OP-AMP w/ 2 outputs to dealing with one signal channel is very common, usually called differential amp circuit. That's why most amps having 2 channels to build a symmetric circuit, then eliminate the noise outside the signal. Then for balanced design circuit, it shares the same idea as differential design. So the circuit will needs 2 channels for each signal, pos/neg. Then combining 2 channels for left/right, please do a simple match yourself how many amps it needs.
Back to your questions, I don't get what the legs you refer to. If those are negative poles, I can tell you they are connected to the SE end's ground. Therefore, it made no difference from the outputs of XLR and SE ports. That's the parts I don't like the SMSL design here. This means it doesn't share concept of balanced output as it branded.
Shahoff
49
Nov 11, 2020
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Rotary_TransformerWhy you combining the channels ? Or you putting the same input signal to positive on one part of dual OPA and to negative on another and on outputs you gets the same signal but with opposite phase or , if you already have balanced signal ( and I think this is our case ) you putting both signals to the same polarity inputs on different parts of OPA. So looks like THDAAA-888 design is as they are saying DUAL MONO on each channel and you need to of this build blocks per stereo AMP and with with balanced input you have effectively more less 4 independent channels.
I hope I am right in my conclusions , but if I am wrong please correct me.
You intrigued me with this statement "The XLR4 output in SMSL SP200 is naively shorted on the cold end (negative poles)" and the only way to check is actually old school multi-meter. I am waiting my unit but if you did it already - will be good to know.
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Xii-Nyth
21
Nov 26, 2021
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Rotary_Transformerit has a huge power output so it doesnt matter, but yes it isnt actually balanced, which means even over the 6.3mm you get all the benefits, but id avoid anyways since in a follow up review they had a bad channel imbalance
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