harman/kardon HK 3490 Stereo Receiver Review

redboat77

redboat77

Enthusiast
Here is more info about the factory that built the HK3490.... Originally the factory was in China but 6 years ago they moved to Vietnam, Vietnam has lower labor costs and when shipping product to Europe no customs duties. The original plan was also for products shipped to North America to have no customs duties under the TPP but this didn't pass under Trump.. Today a 2nd factory has been added in Vietnam, but there they build mostly smart BT and multi-media speakers. However their 1st factory still builds a wide-range audio components; integrated amplifiers for Marantz, Denon, Onkyo, Pioneer, Arcam, NAD, receivers for Anthem, Arcam, NAD, Audio Control and higher-end separate AV surround processors for JBL, Arcam and Audio Control... To me it is impressive to hear the multiple positive comments for the HK stereo receivers. We did (3) different series of HK stereo receivers starting in 1998 up to 2011, but the last HK stereo receiver series(3700) using the PCM power supply was done by the Harman product development/sourcing team based in Shenzen, China....

Just my $0.02... ;)
There was an earlier post, quoted here on the HK 3490 DAC:

8ch 24bit DAC
- 128x Oversampling
- Sampling Rate up to 192kHz
- 24bit 8 times Digital Filter
- Differential Outputs
- On-chip Switched-Capacitor Filter
- S/(N+D): 94dB
- Dynamic Range, S/N: 114dB
- Individual channel digital volume with 128 levels and 0.5dB step
- Soft mute
- De-emphasis for 32kHz, 44.1kHz, 48kHz
- Zero Detect Function

Can you provide more info on this? What AKM chip was used? Any further details on this would be greatly appreciated.
 
P

PENG

Audioholic Slumlord
Can you provide more info on this? What AKM chip was used? Any further details on this would be greatly appreciated.
It has the AK4589 that is a ADC/DAC combo chip, according to the service manual.
 
M Code

M Code

Audioholic General
There was an earlier post, quoted here on the HK 3490 DAC:

8ch 24bit DAC
- 128x Oversampling
- Sampling Rate up to 192kHz
- 24bit 8 times Digital Filter
- Differential Outputs
- On-chip Switched-Capacitor Filter
- S/(N+D): 94dB
- Dynamic Range, S/N: 114dB
- Individual channel digital volume with 128 levels and 0.5dB step
- Soft mute
- De-emphasis for 32kHz, 44.1kHz, 48kHz
- Zero Detect Function

Can you provide more info on this? What AKM chip was used? Any further details on this would be greatly appreciated.
The DAC in the HK3490 was the AKM 4384...
Here is a link..


Just my $0.02... ;)
 
P

PENG

Audioholic Slumlord
The DAC in the HK3490 was the AKM 4384...
Here is a link..


Just my $0.02... ;)
The 3490 has two DAC chips, the AK4384 is used for the XM Satellite radio only. The AK4589 is the main one that has better S/N specs, as quoted by Redboat77 earlier and the data sheet info backs that up:

AK4589
SINAD: 94 dB
S/N: 114 dB

Vs the AK4384 that you linked:
SINAD: 94 dB
DN: 106 dB

The AK4589 shown in the schematics has the same 94 dB SINAD as the AK4384 but is 8 dB better in S/N (DN) that is a significant difference but I wonder if it is only achievable for differential implementation. The schematics appeared to show HK did wire it in differential mode anyway.

HARMAN KARDON HK3490 SERVICE MANUAL Pdf Download | ManualsLib



1611760381014.png





The two channel AK4384 used for the XM radio:
1611760008046.png
 
redboat77

redboat77

Enthusiast
No need to get upset, just asking questions. I was not confused, you are the one who wrote (in your post#129):



That original statement is the source of confusion. 80 dB SNR is 80 dB SNR, it is not equivalent to 0.01% distortions.

However, you are correct that in you response post#132 to my question, you clarified that it was an assumption you made and explained why, so my apology for missing that part of your explanation though your original statement in post#129 is going to to misleading to some of us, not just me.

It would have been easier to follow if you had qualify the 0.01% with "at least.." and add +noise to "distortions", but again, I do apologize for not re-reading your following up post before responding. We both know that if it was just distortions with noise removed, then it could have been less, or more than 0.01% unless if your assumption was correct that Gene actually measured SINAD.

About your "I clearly stated why I thought it was SINAD. ", I would only say, to me that graph was clearly just for SNR that did not include harmonic distortions. Again, he even specified it was "via AES17". If @gene actually meant SINAD he would have made it clear for us readers. Regardless, since it is your assumption, I have to respect that.., and move on.
You were the only one confused. You failed to understand that the AES17 standard for SNR in the presence of a signal includes distortion and that my original assumptions and conclusions were correct and even conservative, and you raised the whole issue with a snarky remark questioning if I understood the difference between SNR and THD.
 
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P

PENG

Audioholic Slumlord
@PENG, NO you don't, Dude took a typo out of context from one of your post.
Thank you sir.. I absolutely did not mean to be snarky about it, but the way I wrote it, I could see why it was taken that way. As far as who's confused about what, I don't see a need to say anything else. Sorry there is no fight, but don't waste the pop corn, there's some new and good stuff on Netflix, can't wait to see the Snowpiercer season 2 tonight.
 
redboat77

redboat77

Enthusiast
Thank you sir.. I absolutely did not mean to be snarky about it, but the way I wrote it, I could see why it was taken that way. As far as who's confused about what, I don't see a need to say anything else. Sorry there is no fight, but don't waste the pop corn, there's some new and good stuff on Netflix, can't wait to see the Snowpiercer season 2 tonight.
My original post was a happy one about enjoying the music on the HK 3490...You brought the confusion and wasted the popcorn.
 
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Gmoney

Gmoney

Audioholic Ninja
Thank you sir.. I absolutely did not mean to be snarky about it, but the way I wrote it, I could see why it was taken that way. As far as who's confused about what, I don't see a need to say anything else. Sorry there is no fight, but don't waste the pop corn, there's some new and good stuff on Netflix, can't wait to see the Snowpiercer season 2 tonight.
PENG, wasn't trying to make fun of you two, AH members like You, Andrew and some of the other that know way more then/than :D me or others about gear, its just fun to watch you guys go at it some, like "Dark" humor so to speak. redboat77 fits right in as a AH member.
 
P

PENG

Audioholic Slumlord
I am ready to watch "Snowpiercer" S02E01 in 4K/ATMOS.

Also "American Gods" S03E03 in 4K. :D
Really, I thought you guys in the US is on S03 Snowpiercer already. I am not sure if American Gods is on the Canadian Netflix, will check shortly.
 
AcuDefTechGuy

AcuDefTechGuy

Audioholic Jedi
Really, I thought you guys in the US is on S03 Snowpiercer already. I am not sure if American Gods is on the Canadian Netflix, will check shortly.
Nope. We're just starting S02 for Snowpiercer.
 

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