JC Acoustics made a skilled DAC and amp!

JC Acoustics UDP-6P is a DAC with a headphone amp priced at $1100, and this is my review. Read my written reviews with scores at iiwireviews.com/
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00:00 Intro
00:20 Features
04:31 Optional add-ons
06:53 Sound (Line Out)
09:43 vs Topping D70 pro octo
10:37 vs Topping D90 III Sabre
11:53 vs SMSL SU-10
13:52 Sound (Headphone Amp)
14:49 vs Topping A90D and SMSL SH-X
15:35 more comparisons
17:18 vs Rose Technics RT5000
19:19 Final words
Room test system:
Eversolo DMP-A8, Allo DigiOne Signature
Lampucera DIY DAC, Gustard R26 DAC: bit.ly/3XLyNCF
Acoustic Invader AMP and PREAMP (Fulcrum version): acousticinvader.com/
Spirit Wind Speakers: • High End 2-way speaker...
Head-Fi:
Aune S17 Pro: amzn.to/3u2O6gu
xDuoo XD05 Pro: shorturl.at/stJRT
Verum 1: www.verum-audio.com/store
Goldplanar GL2000: s.click.aliexpress.com/e/_DkW...
AKG K702: amzn.to/3TSlnUF
#hifi #audiophile #dac #stereo

[@shawnpwatsons1]

I can't wait till you get your hands on a SU-X and compare with SU-10 and JC Acoustics.

[@ekjellgren]

You should do a poll with your audience how many prefer separates to combined products. Would be interesting to see. I know which camp I'm in :)

[@iiWiReviews]

Good idea 🤔

[@sloboat55]

Excellent vid. Cool runnings

[@jayem1826]

Where do all these audio companies come from? Never heard of them.

[@paulhester8086]

There's 8 BILION people on earth now! It's so much more crowded than it was 50 or 60 years ago. Lots of buyers, lots of manufacturers. And, China is hell-bent on world domination. Buy locally!

[@marcusbrsp]

Interesting product. Good review! Yes, 30,000 ųF in a DAC power supply is indeed a lot. My linear power supply for my amplifier has 40,000 ųF (ELNA) and that box is at least twice the size.

[@iiWiReviews]

That's very respectable. Your power amp uses higher voltage capacitors to offer more power that speakers neee. That makes them bigger and more expensive for the same capacitance value.

[@marcusbrsp]

@@iiWiReviews yes, I think you are right. That would make a lot of sense. In my power supply there are four 50V capacitors packing 10,000 ųF each.

[@petrpulpytel]

Thx for another great review Srboljub..👍 Is this AIO suitable for IEMs? (no background noise, enough volume space..?)

[@fearwolfbrewery5014]

You should review the Musical Paradise MP-DX. Not any reviews in English yet at KZbin. A tube dac with upgradeable tubes, caps and clock! And an inbuilt Raspberry Pi can be used as a streamer.

[@user-mu2dp9hg4o]

The life of an electrolytic capacitors relates to the operating temperature. Generally, there are two different capacitor grades, standard +85°C and extra-long life +125°C. So, the life of the equipment is influenced by the internal temperature within the enclosure. The internal image shows a bank of electrolytic capacitors near the heatsink of the linear voltage regulator. These parts will see a temperature rise due to the load current drawn by the DAC circuitry. There are groups of capacitors near the heatsinks for the headphone amplifier (4-off Texas Instruments TPA6120A chips). This is a current-feedback AB amplifier and the heatsink will get hot. The temperature rise is determined by the headphone loading and at normal level should be okay. I suspect the optional fan is for the user who wish to run the full 7500mW output.

[@iiWiReviews]

Some additional info on top of your analysis is that unit gets pretty hot without any load too. I don't have any information on this but it seems that amp is biased to class A generously. This appears to be a trend among most headphone amps lately.

[@user-mu2dp9hg4o]

@@iiWiReviews The TPA6120A amplifier chip has a fixed bias for the class AB output stage. The nominal standing current is 15mA per amplifier. However, the UDP-6P uses 4 of these amplifier chips and this accounts for an internal power dissipation of 3.6W (@±15Vdc supply). The hotspots on the outer surface of the case can be used to locate the source of the heat and thereby pinpoint the internal power dissipation. I suspect it is the voltage regulation and /or the main transformer. Interestingly Texas Instruments recommend an output resistor (39.2 Ohms) for the amplifier. This is required to avoid stability problems with capacitive loads (for example, the inherent capacitance in a pair of headphones). So, this might influence the audio performance with low impedance headphones.

[@metinfps]

Thank you for review. Have you heard Cen Grand dsd dac?

[@naren.freak1c]

Can you do a video on New IanCanada's flagship DIY dac with ultracapicitor power supply. I'm really interested in that one.

[@AttilaBalla87]

THX for the review! How good it is as a premp? It would be good to see the measurements of this unit in ASR.

[@iiWiReviews]

Preamp is decent. If you look at my SMSL SH-X review, you can skip to preamp section and there I talked about its preamp section. This one is on the similar level.

[@aeon7748]

@@iiWiReviewsis any other preamp other than the Freya a waste of time? :)

[@iiWiReviews]

Definitely worth checking out are Ladder Bach and Acoustic Invader preamp. Both were reviewed here on the channel.

[@johncallaghan3097]

Sounds like a great deal if you're after both a DAC and a headphone amp. But as I hardly ever listen on headphones, it would only be for me if I didn't have a Gustard R26. BTW, would you be able to say how the DAC section of the UDP-6P compares with the Gustard?

[@iiWiReviews]

Gustard R26 has bigger soundstage and more full-bodied tonality. This one compares equally to SU-10 that is my reference bellow 1000. But R26 is still my reference bellow 2000 that hasn't been beaten since I reviewed it.

[@sonyairxl]

As always: very nice review! But please let your audience once more learn the rest of your reference system (dac, pre/power amps, speakers, cables etc) Thanx!

[@gabech2789]

How does it compare to Aune S9C ? I know different class of Dac/Amp but price to performance how do they stack up ?

[@iiWiReviews]

S9c is good but not as revealing, rich, and airy as this one. It sounds very clean and dynamic but tonally more simple if that makes sense. If this is over the budget, take a look at Rose Technics RT5000 too.

[@gabech2789]

@@iiWiReviews Thank you for sharing your experiences with both Dac/Amps I do understand the tonal gap that occurs when u step up into the next price category My budget is between 600-900 all in for a Dac/Amp and one of the WiiM streamers, so more realistically looking at the Aune and the RT5000

[@garymalone547]

Looks great value, but I prefer components to do one job each.

[@zzezzobike]

Hi 😀 this could be an alternative to RME , what do you think? Can RME be still the one ?

[@iiWiReviews]

RME has great EQ capabilities if that's something you need. As for the sound quality, J.C Acoustics is a clear winner with more power, better detail retrieval, and wider soundstage.

[@marekk842]

Por 1100 - solo - bastante bueno?... Hay Muy buenos por mitad de precios... Por favor, podrías hacer una comparativa lis dac, s con amplificador de auriculares en rango de precio de 500€??

[@Prometheus1979]

Which dac would you recommend. This Dac or the holo cyan 2 Dac? I’m highly considering the holo cyan dac. I have neutral sounding speakers. But I’m after the best dac in that price range.

[@iiWiReviews]

I haven't had a chance to try Cyan 2 so I can't really help with that dilemma.

[@Prometheus1979]

Sorry, I thought you did a review on it. Thank you for the reply.

[@giulianof8687]

does it has a real analog preamp?

[@paulhester8086]

Love your reviews. You're smart, talented, responsible and funny. If I had a daughter, I'd be stoked if she brought you home to roost! Great channel!

[@iiWiReviews]

Thanks for such high praise and your heartwarming hypothetical family acceptance. I'm definitely showing this to my girlfriend. 😄

[@teachonlywhatiseasy]

do you own a ABX device? are you willing to get one if not?

[@look8234]

Is there fan noise a lot?

[@iiWiReviews]

I didn't get fans. Unit alone is passively cooled so it's silent.

[@D1N02]

Another new Chinese company nobody has ever heard of. They also have an UDP-5 the only difference I could see so fast is the chip. ESS9039Q2M. It is just $750

[@dangerzone007]

Why so much capacitance. Surely you don't need that much to get rid of hum.

[@iiWiReviews]

It makes for very stable DC voltage that is unphased and remains very stable even during power draw peaks.

[@florin604]

Dl200 is better in every way... at much lower price

[@alessandrodifrancesco8110]

and how do you know if you don't compare it? I really doubt that the do200 is better

[@CovertOperative]

perhaps you should be reviewing new washing machines as all of yours t shirts have shrunk! 2