[LSD25]

Quote:

P version has some technical characteristics a bit better than PA.

Well, I have three OPA2132PAs and one OPA2132P,  would it be okay if I use them together in the four I/V Slots (I/V Slot 1)?
 
or do all four of them have to be exactly the same?

 

[DMarasovic]

Quote:

Well, I have three OPA2132PAs and one OPA2132P,  would it be okay if I use them together in the four I/V Slots (I/V Slot 1)?
 
or do all four of them have to be exactly the same?

Give them a try, specification tolerances go to + or -. They may be the same.

 

[LSD25]

Quote:

Give them a try, specification tolerances go to + or -. They may be the same.

I hope it doesn't fry it lol I'll give it a go
 
I remember reading somewhere that the P and PA at the end are just different types of packaging

 

[DMarasovic]

Quote:

I hope it doesn't fry it lol I'll give it a go
 
I remember reading somewhere that the P and PA at the end are just different types of packaging

They are exactly the same except some different electrical tolerances

 

[LSD25]

I think I like this combo!
OPA2132 in I/V Slot 1
and NE5532 in Buffer Slot 2
It definitely added more warmth overall and power to the bottom end sound of my HD800
Soundstage is wider too

 

[DMarasovic]

Quote:

I think I like this combo!
OPA2132 in I/V Slot 1
and NE5532 in Buffer Slot 2
It definitely added more warmth overall and power to the bottom end sound of my HD800
Soundstage is wider too

Try to put LM 4562 that are at xlr outputs (you don't need them while listening to headphones) to Buffer slot 2 - there will be more detail and slightly less warm.

 

[LSD25]

Quote:

Try to put LM 4562 that are at xlr outputs (you don't need them while listening to headphones) to Buffer slot 2 - there will be more detail and slightly less warm.

I'll give that a try. Though would it be ok if the xlr slots don't have any op-amps in them? or should i just swap them?

 

[DMarasovic]

Quote:

I'll give that a try. Though would it be ok if the xlr slots don't have any op-amps in them? or should i just swap them?

Swap them with NE 5532 for test, but if you will use xlr ouputs in the future, get a pair of 4562 .

 

[vagii]

I'm settled with 2*Dual AD797BR LPF, 4*LME49990MA I/V, 2*OPA2211AIDDA Buffer.
Problem is, now there is too much freaking sibilance in those pop, rock, r&b flacs. I loved The Hill of Thieves from Cara Dillon, but now i just can't stand her essssss...on the other hand, Diana Krall the Girl in the other Room 24/88 flac sounds amazing without sibilance.

 

[LSD25]

Quote:

I'm settled with 2*Dual AD797BR LPF, 4*LME49990MA I/V, 2*OPA2211AIDDA Buffer.
Problem is, now there is too much freaking sibilance in those pop, rock, r&b flacs. I loved The Hill of Thieves from Cara Dillon, but now i just can't stand her essssss...on the other hand, Diana Krall the Girl in the other Room 24/88 flac sounds amazing without sibilance.

You should try a parametric equalizer using the VST wrapper if you're on foobar.
its pretty effective in removing the sibilance

 

[bizkid]

I tried the AD797 but it was oscilating and getting VERY hot. I would leave the output stages as they are and use the LME49990 for i/v and filter stages of the DAC. This doesnt change the soundsignature but delivers more clarity, less harsh highs and a bigger more 3d soundstage. All other OPAs i tried were coloring the sound way  too much esp. the OPA827 and 627. The output stages are already very well equiped, you won't find better in $$$$$ studio DACs. The headphone output for example works better for my ears with the supplied LME49720 as compared to the LME49990.

 

[vagii]

Quote:

You should try a parametric equalizer using the VST wrapper if you're on foobar.
its pretty effective in removing the sibilance

I don't find any sibilance problem in better vocal recordings.
I'm using SPL Vitalizer MK2-T(mostly off) and Sonalksis Ultimate-D tracking/mastering VSTs in uLilith.

 

[vagii]

Quote:

I tried the AD797 but it was oscilating and getting VERY hot. I would leave the output stages as they are and use the LME49990 for i/v and filter stages of the DAC. This doesnt change the soundsignature but delivers more clarity, less harsh highs and a bigger more 3d soundstage. All other OPAs i tried were coloring the sound way  too much esp. the OPA827 and 627. The output stages are already very well equiped, you won't find better in $$$$$ studio DACs. The headphone output for example works better for my ears with the supplied LME49720 as compared to the LME49990.

My AD797s on LPF(from audiojade@ebay) are cooler than LME49990 on I/V. Also, LT1358 sounds great on LPF, especially for recordings like Friday Night in San Francisco.
Anyone has tried OPA1611/OPA1612 on LPF/Buffer?

 

[daws0n]

I am going to upgrade the opamps in my E1. I use it for playing music through my hifi via the RCA outputs (headphone and XLR outputs not used).
 
I have spent some time reading through this thread and others, and it seems like the best approach would be replace all NE5532 chips in the I/V and LPF stage with dual LME49990 on DIP-8 adapters??
 
I am also considering changing the RCA's output LME49720NA for a higher grade TO99/metal can LME49720HA.
 
AD797 has also been recommended, but I have read mixed opinions as to how stable it is (known to oscillate etc..)?
 
I am about to order parts off eBay, so any advice you guys have would be much appreciated.

 

[winged creature]

Hey guys I'm trying to improve the details on this DAC and make it a tad more laid back.  Are there any op-amps I can switch to achieve this?