New Audio-gd R7 (R2R 7) & R8 Flagship Resistor Ladder DACs
post-13633338
Post #151 of 6,032

FredA

Headphoneus Supremus
Joined
Dec 15, 2013
Messages
3,213
Reaction score
1,125
Joined
Dec 15, 2013
Posts
3,213
Likes
1,125
I'm using the R2R 7 out of a Power Plant Premier, which I'm going to assume would be equivalent. I guess the impression that the "exceeding the expect" thing on the Audio-gd web site is Kingwa having a go at Rockna selling the same thing for $15k. Someone in the Rockna thread said his Yggy was more detailed...



I recall Kingwa saying something about how the NOS was implemented. The three modes in the R2R 7 obviously have something to do with it. After playing with jumpers, I've gone back to 8x OS, ie: The stock config. Other than up-sampling to 352/384k in Audirvana (with or without NOS mode on), every other combination either lacked in clarity (NOS) or sounded odd (DSD up-sampling).
I only tried the default mode (pll on and off) and i alway upsampled 44/16 to 48/24. Sounds clean and natural. You get the dynamics of OS and still get the smoothness.

I use a balanced isolation transfo, which i believe is helping. I have not played with power cords, which i will do eventually to make the sound crisper. I only use very smooth power cords right now for the whole system.

Not sure the Power Plant Premier is equivalent. The ac regeneration is probably specifically tuned for each specific gear in the he series.

The r2r 7 certainly exceeded my expections by a big margin. I feel like i own a 10k dac.
 
Last edited:
     Share This Post       
post-13634964
Post #152 of 6,032

Wynnytsky

500+ Head-Fier
Joined
Apr 16, 2012
Messages
512
Reaction score
209
Location
Morristown, NJ
Joined
Apr 16, 2012
Location
Morristown, NJ
Posts
512
Likes
209
Website
127.0.0.1
The r2r 7 certainly exceeded my expections by a big margin. I feel like i own a 10k dac.
Was trying to hold out for a write-up on the R2R7 vs Denafrips Pontus or 7.77, but statements like that didn't make it easy, and I lasted about a week.
This will be my 4th DAC (all have been chi-fi) and 1st AGD. At thrice the price of the X20 my expections are pretty high.

My P3 PowerPlant is 750VA (I think the Currawong's premier is 1200VA).
I do like the P3's ethernet port -- let's me warm up my equipment before I get off the train.
Seems silly to use PSAudio's powerplay website -- they should have a native app.
 
     Share This Post       
post-13635009
Post #153 of 6,032

FredA

Headphoneus Supremus
Joined
Dec 15, 2013
Messages
3,213
Reaction score
1,125
Joined
Dec 15, 2013
Posts
3,213
Likes
1,125
Was trying to hold out for a write-up on the R2R7 vs Denafrips Pontus or 7.77, but statements like that didn't make it easy, and I lasted about a week.
This will be my 4th DAC (all have been chi-fi) and 1st AGD. At thrice the price of the X20 my expections are pretty high.

My P3 PowerPlant is 750VA (I think the Currawong's premier is 1200VA).
I do like the P3's ethernet port -- let's me warm up my equipment before I get off the train.
Seems silly to use PSAudio's powerplay website -- they should have a native app.
Sure hope you like it.

Let it run for 24-48 hours before listening to it otherwise you could be inclined to return it like in was. The r2r 7 sounds strange before a warm-up time of 3-4 hours. I never turn it off.
 
     Share This Post       
post-13635086
Post #154 of 6,032

Wynnytsky

500+ Head-Fier
Joined
Apr 16, 2012
Messages
512
Reaction score
209
Location
Morristown, NJ
Joined
Apr 16, 2012
Location
Morristown, NJ
Posts
512
Likes
209
Website
127.0.0.1
Seems like a unit like this would benefit from a standby switch to keep it from going cold.
My Primare i30 sucks 24watts from the wall while on standby, and climbs to 70watts during usage.

So curious how it will gel with a T+A Class D integrated vs Primare integrated vs preamping from both into an Exposure 3010s.

I don't see any fuses in the photos.
I can still tape beeswax fuses to the transformers and see what that does
 
     Share This Post       
post-13635240
Post #155 of 6,032
Joined
Jan 4, 2008
Messages
17,004
Reaction score
9,629
Location
Fukuoka, Japan
Joined
Jan 4, 2008
Location
Fukuoka, Japan
Posts
17,004
Likes
9,629
Website
www.hear.reviews
The fuses are built into the transformers themselves. They are also thermal.
 
     Share This Post       
post-13637110
Post #156 of 6,032

FredA

Headphoneus Supremus
Joined
Dec 15, 2013
Messages
3,213
Reaction score
1,125
Joined
Dec 15, 2013
Posts
3,213
Likes
1,125
Today i am at 336 hour burning time (636 with factory time). I'd say dynamics are still varying/improving, bass and overall balance as well. I am sure it's not all there yet. I will burn it for another 2 weeks 24/7.
 
Last edited:
     Share This Post       
post-13641848
Post #157 of 6,032

FredA

Headphoneus Supremus
Joined
Dec 15, 2013
Messages
3,213
Reaction score
1,125
Joined
Dec 15, 2013
Posts
3,213
Likes
1,125
I am at 700 hours total this morning with the r2r 7. Believe it or not, it needs all that time to have the bass right. Now it's slamming. The macrodynamics and microdymamics seem also perfect now. I never had a component that took so much burning before reaching close to its full potential.

Now that it's there, i can tell you that compared to the M7, the r2r 7 has more meat on the bone, and more resolution as well. Music is more lively. Listening through the nfb1-amp and AKG701 in balanced mode has never been so statisfying. Same story with speakers. This dac does everything right. The bass is even richer that of the M7.

To those who buy one, let it burn, be patient and you will be greatly rewarded.

About the DSP settings, Kingwa has selected what he considered the best parameters as defaults for this dac, including dithering off and pll off. As for me, i still have the pll jumper on using i2s and have no intent to change any setting for now. I'll just enjoy the ride for a while...
 
Last edited:
     Share This Post       
post-13641933
Post #158 of 6,032

DACLadder

Headphoneus Supremus
Joined
Feb 16, 2013
Messages
1,749
Reaction score
892
Joined
Feb 16, 2013
Posts
1,749
Likes
892
AGD is shipping products called "R2R15" and "R2R7" according to their shipping log. Any idea what is a "R2R15"?

Interesting observation about PLL off as default. I'll have to play with that jumper on the S7 but sounds great with no jumpers installed.

Edit: R2R15 looks like a NOS R2R headphone DAC that is only advertised in the Asian markets....
http://audio-gd.com/R2R/R2R15/R2R15CH.htm
 
Last edited:
     Share This Post       
post-13641991
Post #159 of 6,032

FredA

Headphoneus Supremus
Joined
Dec 15, 2013
Messages
3,213
Reaction score
1,125
Joined
Dec 15, 2013
Posts
3,213
Likes
1,125
AGD is shipping products called "R2R15" and "R2R7" according to their shipping log. Any idea what is a "R2R15"?

Interesting observation about PLL off as default. I'll have to play with that jumper on the S7 but sounds great with no jumpers installed.

Edit: R2R15 looks like a NOS R2R headphone DAC that is only advertised in the Asian markets....
http://audio-gd.com/R2R/R2R15/R2R15CH.htm
Yeah. I will try again with pll jumper off at some point.

The r2r15 ifs a dac/amp combo at a very affordable price for just the chinese market i assume.
 
Last edited:
     Share This Post       
post-13642004
Post #160 of 6,032

Wynnytsky

500+ Head-Fier
Joined
Apr 16, 2012
Messages
512
Reaction score
209
Location
Morristown, NJ
Joined
Apr 16, 2012
Location
Morristown, NJ
Posts
512
Likes
209
Website
127.0.0.1
     Share This Post       
  • Like
Reactions: motberg
post-13643146
Post #162 of 6,032

FredA

Headphoneus Supremus
Joined
Dec 15, 2013
Messages
3,213
Reaction score
1,125
Joined
Dec 15, 2013
Posts
3,213
Likes
1,125
On paper the r2r 15 looks fantastic. Low distorsion, high S/N, good headphone section, amanero usb, all that for around 300usd. I am tempted to buy one for the office.

Oh and have told you the r2r 7 is just fantastic?
 
     Share This Post       
post-13643465
Post #163 of 6,032

Tauko

New Head-Fier
Joined
Oct 21, 2011
Messages
8
Reaction score
15
Joined
Oct 21, 2011
Posts
8
Likes
15
     Share This Post       
post-13643517
Post #164 of 6,032
Joined
Jan 4, 2008
Messages
17,004
Reaction score
9,629
Location
Fukuoka, Japan
Joined
Jan 4, 2008
Location
Fukuoka, Japan
Posts
17,004
Likes
9,629
Website
www.hear.reviews
I've been playing around with my USB converters, and I'd probably say I marginally prefer the WaveIO via S/PDIF to the inbuilt USB, but it's very close, with the WaveIO seeming to be slightly smoother.
 
     Share This Post       
  • Like
Reactions: FredA
post-13643535
Post #165 of 6,032

lukeap69

Headphoneus Supremus
Joined
Feb 15, 2014
Messages
2,464
Reaction score
327
Joined
Feb 15, 2014
Posts
2,464
Likes
327
A
I've been playing around with my USB converters, and I'd probably say I marginally prefer the WaveIO via S/PDIF to the inbuilt USB, but it's very close, with the WaveIO seeming to be slightly smoother.
Amos, have you tried Eitr?
 
     Share This Post       

Users Who Are Viewing This Thread (Users: 1, Guests: 5)

Top