[nahpungnome]

Can someone tell me the ideal position for volume on my I+?  I have a DAC that has a pre-amp lineout so it has volume control also (it also has a amp on it, it's the Micca Origen).  
 
Should I max out the amp's volume and attenuate with my pre-amp? Or somewhere in between?  When I tried max on amp and attenuating on the pre-amp, the treble sounded grainy, but the bass sounded good.  When I'm at 50% on the amp, the bass doesn't seem as good.  75% on the amp seems to be the sweet spot so far <shrug>.

 

[Michael V]

  Can someone tell me the ideal position for volume on my I+?  I have a DAC that has a pre-amp lineout so it has volume control also (it also has a amp on it, it's the Micca Origen).  
 
Should I max out the amp's volume and attenuate with my pre-amp? Or somewhere in between?  When I tried max on amp and attenuating on the pre-amp, the treble sounded grainy, but the bass sounded good.  When I'm at 50% on the amp, the bass doesn't seem as good.  75% on the amp seems to be the sweet spot so far <shrug>.

I was always told to keep the source at 100% volume. I normally have the 1+ volume knob under the 10 line because i have 32ohm grado's. I just tried to see how low i had to turn my source to get even 50 on the 1+ volume knob and I had to put my source volume from 100 to 10. Needless to say I didn't hear any difference in bass or anything, but I started to hear even louder hum/hiss from the tubes than I already do when I have no music playing.

 

[nahpungnome]

  I was always told to keep the source at 100% volume. I normally have the 1+ volume knob under the 10 line because i have 32ohm grado's. I just tried to see how low i had to turn my source to get even 50 on the 1+ volume knob and I had to put my source volume from 100 to 10. Needless to say I didn't hear any difference in bass or anything, but I started to hear even louder hum/hiss from the tubes than I already do when I have no music playing.

 
 
My thinking the amp should be at 100% was maybe due to my old-school home audio thinking.  My dad has Onkyo M504 and the preamp (forgot which model).  There's no volume on the M504, the preamp controlled the volume, so I figure the amp was outputting at 100%.
 
I've also read that the source should be at 100%, but my dac/amp at 100% does 1.7V line out, not sure if that matters or not.

 

[Michael V]

I've decided I'm gonna upgrade form the opa2107 to the burson v5. They have two different versions on the website and it says pair for each one. I wonder why they don't sell them by themselves and not in pairs. Anyway I'm not sure if I should get the single or dual. If I do need to get the dual then i need to find a site that doesn't sell in pairs.
 
http://www.partsconnexion.com/79214.html
 
http://www.partsconnexion.com/79212.html

 

[gulakpi]

  I've decided I'm gonna upgrade form the opa2107 to the burson v5. They have two different versions on the website and it says pair for each one. I wonder why they don't sell them by themselves and not in pairs. Anyway I'm not sure if I should get the single or dual. If I do need to get the dual then i need to find a site that doesn't sell in pairs.
 
http://www.partsconnexion.com/79214.html
 
http://www.partsconnexion.com/79212.html

While I do not own a LD1+, I thought the LD1+ only uses one piece of "Dual Opamp".
Also, I'm just curious if this discrete opamp will fit in the LD1+ physically.  They look quite tall to me!

 

[nahpungnome]

  I've decided I'm gonna upgrade form the opa2107 to the burson v5. They have two different versions on the website and it says pair for each one. I wonder why they don't sell them by themselves and not in pairs. Anyway I'm not sure if I should get the single or dual. If I do need to get the dual then i need to find a site that doesn't sell in pairs.
 
http://www.partsconnexion.com/79214.html
 
http://www.partsconnexion.com/79212.html

Can't you buy from Burson directly?

 

[iamxLn]

  I've decided I'm gonna upgrade form the opa2107 to the burson v5. They have two different versions on the website and it says pair for each one. I wonder why they don't sell them by themselves and not in pairs. Anyway I'm not sure if I should get the single or dual. If I do need to get the dual then i need to find a site that doesn't sell in pairs.
 
http://www.partsconnexion.com/79214.html
 
http://www.partsconnexion.com/79212.html

let us know how it sounds!

 

[Michael V]

  Can't you buy from Burson directly?

I didn't see the buy link at the bottom of their website lol.
 

  let us know how it sounds!

Thought it was only gonna be $70, but it's $20 shipping and then $20 for the extender so it can fit in the case. So I'm gonna wait a bit until I buy it.

 

[nahpungnome]

  I didn't see the buy link at the bottom of their website lol.
 
Thought it was only gonna be $70, but it's $20 shipping and then $20 for the extender so it can fit in the case. So I'm gonna wait a bit until I buy it.

Yeah I was interested until I saw the price lol, it costs over half of the amp itself to use their op amp.

 

[MunkyOne]

Hi,
 
I have some of these Burson op-amps, in both mono and dual form.  These Burson (and other makes) discreet amps are far too big to fit into the LD1+ case, unless you plan to do some case mods to accommodate them.
 
In my view, it is not worth the work involved to fit one into an LD1+ in terms of audible benefit.  Out of curiosity, I tried one of the dual op-amps in my LD1+ (case removed) and found that the result was not really any better than the MUSES02 (standard DIP-8 chip) that I have been using in my LD1+ for more than a year now.   The MUSES02, or depending on your taste MUSES01, is a very worthy and far simpler upgrade from the opa2107.  It is a straight swap.
 
While the Bursons are good; I use them in my DACs, the MUSES02 is as good in the LD1+ and far simpler and cheaper.

 

[nahpungnome]

  Hi,
 
I have some of these Burson op-amps, in both mono and dual form.  These Burson (and other makes) discreet amps are far too big to fit into the LD1+ case, unless you plan to do some case mods to accommodate them.
 
In my view, it is not worth the work involved to fit one into an LD1+ in terms of audible benefit.  Out of curiosity, I tried one of the dual op-amps in my LD1+ (case removed) and found that the result was not really any better than the MUSES02 (standard DIP-8 chip) that I have been using in my LD1+ for more than a year now.   The MUSES02, or depending on your taste MUSES01, is a very worthy and far simpler upgrade from the opa2107.  It is a straight swap.
 
While the Bursons are good; I use them in my DACs, the MUSES02 is as good in the LD1+ and far simpler and cheaper.

Good to know.  My AP2107 cost me $9.99 shipped.  The MUSES02/01 are expensive, they'd have to be $20 at most for me to even want to try them lol.

 

[WilliamLeonhart]

I was digging up this thread and found some information about the LT1364... Can someone tell how this opamp compares to the 2107? 
 
Also, is "linear" opamp the same as single opamp? I look the 1364 on ebay and found some links that say "linear".
 
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.XLT1364+.TRS0&_nkw=LT1364+&_sacat=0

 

[MunkyOne]

Hi,
 
Linear in this context, refers to the manufacturer, Linear Technology.  Hence LT at the begining of the part number.
 
While I have no personal experience of the LT1364, It is discussed here .
 
According to the poster, it is on the neutral side, as opposed to the warmish OPA2107.

 

[Michael V]

Alright so I found out that burson has an ebay store and the shipping was $9 cheaper for their op amp. Also with the money I saved I bought an elna silmic 2 10uf 50v cap and I'm going to do this mod to the burson that pelopidas posted on another thread here http://www.head-fi.org/t/432749/the-opamp-thread/5070#post_12213979
 

 

[WilliamLeonhart]

Perhaps this is the info I need to make sure any opamp is compatible with the I+
 

 
The OPA2107 is a 2-channel chip, so you only need one, but make sure you get the DIP/PDIP/8-DIP package version. 
The LT1364 is a 2-channel chip, so you only need one, but make sure you get the DIP/PDIP/8-DIP package version. 

http://www.littledot.net/forum/viewtopic.php?f=3&t=385&start=0