Marantz AV 20 13.4CH Pre/Pro & AMP 20 12CH Amplifier Official Thread

E

EBN

Audioholic
AMP30 is 6 channel variant with 200w / 400w power output, however there is no 100% Guarantee 8-ohm normal only 70%. Hefty price too!

AMP30.png


Taken from the Masimo clip posted few days ago. With all respect for the Marantz engineers i suggest taking few glasses of whiskey or vodka before listening this. Kinda hard to listen although @PENG being EE he probably enjoys listening engineers talking. Especially the HDAM part! :D

AMP20.png


SINAD.png


 
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D

dlaloum

Senior Audioholic
AMP30 is 6 channel variant with 200w / 400w power output, however there is no 100% Guarantee 8-ohm normal only 70%. Hefty price too!

View attachment 73609

Taken from the Masimo clip posted few days ago. With all respect for the Marantz engineers i suggest taking few glasses of whiskey or vodka before listening this. Kinda hard to listen although @PENG being EE he probably enjoys listening engineers talking. Especially the HDAM part! :D

View attachment 73610

View attachment 73611

The Cinema 30 vs AMP20 SINAD measures aren't exactly apples and apples - as they are running the signal solely through the power amp for the amp20, whereas for the Cinema 30 they need to run the signal through the pre-amp as well - hence we have no indication of the SINAD of the Cinema 30 power section, only of the Cinema30 as a whole.... for an apples/apples comparison the AV20 would need to be "in circuit" - at which point the total SINAD might be quite a lot closer between the two!

D&M measurements and specs have historically been reliable and replicable by third party bench tests, so we can give them due credibility - but in this case... treat with caution!
 
P

PENG

Audioholic Slumlord
Taken from the Masimo clip posted few days ago. With all respect for the Marantz engineers i suggest taking few glasses of whiskey or vodka before listening this. Kinda hard to listen although @PENG being EE he probably enjoys listening engineers talking. Especially the HDAM part!

I can tell you the HDAM part is still the same old bullshit, non sense!!
The HDAM's benefits are totally valid technically speaking, but the trouble is the logic. No one has ever, and I am surprised, thought not that surprised @gene has not challenge their claims so far.

The logic is, as I have explained many times, when a signal chain involves multiple devices, the overall results are limited to the performance of the worse device, or parts.

For example, you can put 10 parts in series, and want to have the best final output resistance, i.e. lowest. If you however, only use one of the parts that have 0.0000 uohms, or even a 0 ohms, better than a straight copper wire, the circuit's final total impedance could still be 0.05 ohms if even just one of the 10 part's impedance is 0.05 ohms.

So how can the HDAM's slew rate matter if the opamps up and down stream of the HDAM itself is the same as those used in other AVRs or AVPs including those made of Marantz and Denon??

That's just one example, just think about the same logic for distortions, frequency response, noise and whatever, just about the only practical benefit might be the rated output voltage and impedance, assuming the HDAM's are the final part in terms of "buffering", but from what I could see in the service manuals, such as those of the SR6014, they do have an opamp placed after the HDAM, and just before the power amp input.

Any questions, challenge on the logic, prove me wrong please..

Having said that, I would love to trade in my AVM70 for the AV20. HDAMs at least would no longer hurt the preout SINAD measurements, as they seemed to have in the past, I guess thanks to ASR's measurements, they have improved since the SR8015.
 
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ryanosaur

ryanosaur

Audioholic Overlord
Surprised that @mtrycrafts hasn't been asking for status updates! :p

I installed and did basic setup Saturday night and in to Sunday morning.

I had a lot to clean up back there! :eek: There’s a bit'o'mess of spaghetti but I was able to minimize it some.

I really like switching to the WBC Pro StarQuad XLRs.

For the AV20, thus far...

Unboxing was pretty straightforward. It came in a nice heavy duty double wall-box. For the very small amount of damage the box looked to have had, the foam blocks inside showed that the impact it took must've been pretty solid! The Tossers at FedEx certainly did their best. ;)

Installation and initial setup was very easy. In fact the newer UI is super snappy and much cleaner than what was on the SR6012.

Beyond all that, the unit itself definitely looks and feels well constructed.

Now, I'm just eager to get some time to run Audyssey and get everything dialed back in!

Anybody who finds some free time lying around... please send it this way! :D
 
mtrycrafts

mtrycrafts

Seriously, I have no life.
Surprised that @mtrycrafts hasn't been asking for status updates! :p

I installed and did basic setup Saturday night and in to Sunday morning.

I had a lot to clean up back there! :eek: There’s a bit'o'mess of spaghetti but I was able to minimize it some.

I really like switching to the WBC Pro StarQuad XLRs.

For the AV20, thus far...

Unboxing was pretty straightforward. It came in a nice heavy duty double wall-box. For the very small amount of damage the box looked to have had, the foam blocks inside showed that the impact it took must've been pretty solid! The Tossers at FedEx certainly did their best. ;)

Installation and initial setup was very easy. In fact the newer UI is super snappy and much cleaner than what was on the SR6012.

Beyond all that, the unit itself definitely looks and feels well constructed.

Now, I'm just eager to get some time to run Audyssey and get everything dialed back in!

Anybody who finds some free time lying around... please send it this way! :D
Me too. :D
Too many other posts and too little time:D
Thanks for the update. Good opportunity to vacuum back there as well. ;)
 
ryanosaur

ryanosaur

Audioholic Overlord
Quick note on running Audyssey...

As my only experience with a Marrantz AVR is my 6012, I was very impressed that the AV20 operated about 20˚ cooler than the 6012 did; 85˚ vs 115˚ after measuring all 8 positions.

Yes I know the Amp stage of the 6012 generates heat even if using external Amps, but I also know that Amp stage is not the only item to contribute to heat generation in these machines. A real test for me will be how the AV20 does in regular usage, of course. That said, it is still nice to see the Processor not being taxed so much. :)

Hoping I can finish editing my curves later today and then upload the corrections to the AV20 with some time to play. :)
 
AcuDefTechGuy

AcuDefTechGuy

Audioholic Jedi
Quick note on running Audyssey...

As my only experience with a Marrantz AVR is my 6012, I was very impressed that the AV20 operated about 20˚ cooler than the 6012 did; 85˚ vs 115˚ after measuring all 8 positions.

Yes I know the Amp stage of the 6012 generates heat even if using external Amps, but I also know that Amp stage is not the only item to contribute to heat generation in these machines. A real test for me will be how the AV20 does in regular usage, of course. That said, it is still nice to see the Processor not being taxed so much. :)

Hoping I can finish editing my curves later today and then upload the corrections to the AV20 with some time to play. :)
My $7500 Denon AVP-A1HDCI didn’t have any internal amps either, but it still had egg-frying operating-temp. :D

So glad to see that SU has greatly improved on the temp, among other things.
 

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