[Magick Man]

Yeah, the OPA2107AP. Don't have to change anything, just be careful pulling it out, and make sure all the pins line up putting the new one in.

 

[Melvins]

ordered! haha awesome, thanks guys

 

[jommy999]

Got my LD1+ today . roll the GB408A tubes and LT1364 opamp in ,,,, need to wait and burn in for a bit but so far so good. a little less bass than straight out from my soundcard ( just bought the Asus Xonar DX ) , im waiting for my OPA2107 to turn up and i hope will give a little more bass ( i could add bass on soundcard setting but somehow lost details of sound ) .
will give more result in few days when everything settle. Happy Day !!! 

 
update : i rolled the E91 mullard CV4010 in and sound better and more bass than GB408A ... its like 5 times cheaper and seem like doing better job lol. but too early to tell i guess. will need to burn them in properly first. 

 

[jommy999]

5 Days of LD1+ results ! 

 
Opamps battle : LT1364 VS OPA2107 
- both giving similar sound overall 
- LT1364 more details in mid-range 
- OPA2107 more bass and a little better soundstage ( but both are great )
 
Tubes battle : Mullard EF91 VS Sylvania goldpins GB408A VS Voshkod goldpins EF95  
 
- before burning them in - EF91  give better sound ,details , bass ,soundstage, etc than GB408A but after few days of burning then in ,the 408A is now sound so much better with nice Bass impact ( could feel it full bass impact ) , great vocal and soundstage too therefore the GB408A is a winner here ( i believe it will even get better after 100 hrs or 200 hrs )
 
- i got Voshkod only yesterday and now in the process of burning them in. so far so good ,better soundstage than GB408A, sound so clear ,warm , vocal as good as GB408A ( not sure if anything to do with goldpins as both are ( sound so pure and clear ,the vocal sound is so standing out ) but now the bass is not as good as GB408A but i believe it will get better after few days. lets see and i'll give more update
 
ps. i actually have rolled in Tung Sol 6AK5 too but only for one hr . it picked up so much noise and i just didn't want to give it a go any further lol so i can't really give any comment about them.  

 

[GotNoRice]

Wasn't the LT1364 the opamp everyone was avoiding because of the horrible DC offset?
 
I'd love to hear your opinion of the LM4562 if you ever get one.

 

[john57]

OPA2107 more bass and a little better soundstage ( but both are great )
 
That is what I like about the OPA2107 great soundstage.

 

[jommy999]

Quote:

Wasn't the LT1364 the opamp everyone was avoiding because of the horrible DC offset?
 
I'd love to hear your opinion of the LM4562 if you ever get one.

yes that one but actually noone report any problem really , just the test that the guy did and think it might damage the headphone but i give it a go. seem alright so far .
 
about the soundstage of  both opamps as i have tested both on GB408A ( after burning in for 3 days and try to listening carefully ) so basicly both give really similar sound ( or both are great ^_^ , sorry to stock opamp lol ) so therefore i would say its depend on the combination with the tubes.
 
now my set is OPA2107 with  Voshkod EF95 ... warm tube sound , pure and clear vocal ,great soundstage and just mmm kinda my ears are liking the sound somehow( my Acoustic songs collection could not sound any better ) but its still in burning in process i think these will be my favorite tubes yet.
 

 

[Melvins]

anyone have any op amps they no longer need? or use? and wanna sell me

 

[jommy999]

Quote:

anyone have any op amps they no longer need? or use? and wanna sell me

I live in UK ,i got both my opamp from their site as sample which they sent from USA , i thought you have order some sample. ( i got them like 3 days after ordered )
 
i got some spare but i think easier for you just order sample from their site and they send via Fedex
 

 

[Melvins]

what site? is this from Texas instruments? they wouldn't send me samples because I don't have a university or a company e mail

 

[jommy999]

yes . i just put my University name ( u can put any company name in really like ' Melvins Tube Amp ltd ' 

) with my hotmail email address  and delivery to my home address.
just picked the choice what you need it for. ( i picked one that for wireless amp ) .
 
or can order from this guy 
http://www.ebay.com/itm/Burr-Brown-OPA2107-precision-dual-difet-operational-amplifier-dip-8-pin-pkg?item=260897994778&cmd=ViewItem&_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D5%26po%3DLVI%26ps%3D63%26clkid%3D7170761463989517618#ht_680wt_1139
 
i bought from him as well before i knew about sample site.

 

[Melvins]

they said they needed an email address though? Like a university email.

 

[jommy999]

i have never get any contact back from them , after register and ordered then i get email confirmation ( with my hotmail.com ) i've never give any other email. mm not sure why they did ask you for that . but order with the guy on ebay link i gave you . i tried his opamp and seem to be alright  ( heard that cheap opamp on ebay  from china some are fake )

 

[Melvins]

is it worth the 7 bucks? does it make that much of a difference?

 

[jommy999]

i think most ppl think its better . i heard few of ppl say that they like stock opamp more than the 2107.
for me stock opamp is actually good too but i don't feel the impact of sound. how to say, its like i could listening to my acoustic collection with stock opamp and fallsleep on it ,
to be honest after i tried LT1364 then i have never change back to stock opamp so i never really compare stock opamp with the 2107 yet.
 
ps.i would send you one if i live in US.