New Posts  All Forums:Forum Nav:

The Opamp thread - Page 274

post #4096 of 4703
Quote:
Originally Posted by SpudHarris View Post

 

Sounds the same as my experience. I likened the 49990 to a high end tube amp because of the great resolution and detail. Anyone that has experienced a decent tube amp will understand that there is a fullness to the sound, micro details without glare, just magical....

 

Yes!   I've put a few more hours on them, now, and I remain very impressed.  

 

I have to add that the soldering skills of the ebay seller named "frugalphile" are impeccable.  The packaging was excellent, too.  It's curious that his ebay store offers very little other than the LME49990 SOICs soldered to DIP8 adapters.  They must be popular op-amps.  wink.gif

 

 

Frugalphile's LME49990 singles

 

Frugalphile_LME49990-2x_Single.jpg

 

http://www.ebay.com/itm/2x-LME49990-DIP8-ADAPTERS-/190679106821?pt=US_Amplifier_Parts_Components&hash=item2c655c4505

 

 

Frugalphile's LME49990 Dual (the other package is underneath the PCB)

 

Frugalphile_LME49990-Dual.JPG

 

http://www.ebay.com/itm/DUAL-SOIC-LME49990-DIP8-ADAPTER-/190682726763?pt=US_Amplifier_Parts_Components&hash=item2c6593816b

 

Mike

post #4097 of 4703

This might seem off-topic in this thread, but I wanted to share this with you keen listeners, the JVC FXD80 IEM, most precise imaging I've ever heard I think.

post #4098 of 4703

Frugalphile does sell other chips on occasion.

 

I snapped a few of these a couple of months back, they are very, very clean sounding. Cooler side of neutral but not metalic.

 

$(KGrHqNHJDcE8fTfy3)NBPOU6nU7kQ~~60_12.JPG

post #4099 of 4703

Those sound like they'd be a good match for a warm source, like the RWA iMod.  

 

I borrowed one of those for a couple of weeks and found it to be too warm for my tastes when used with the very neutral Meier Stepdance.

post #4100 of 4703

Check out these tutorial pages published by National Semiconductor, regarding op-amps! 

 

Beginning of the course:  http://www.national.com/AU/design/courses/268/main.htm

 

The Basics of an Operational Amplifier:  http://www.national.com/AU/design/courses/268/the02/00the02.htm

 

Operation Amplifier Parameters:  http://www.national.com/AU/design/courses/268/par03/00par03.htm

 

The pages seen at this last link, alone, will greatly enhance your ability to understand op-amp datasheets.

 

Joy!

 

Mike

post #4101 of 4703
hi Nigel,
i ordered some of those LME49880, still wait on the mail, i'm hoping they will come asap
post #4102 of 4703

My name is Nigel (spud) and I'm.........a...........recovering addict.

 

I know this is blasphemy here but I'm trying not to roll at present. I have picked up a couple of RSA amps (Tomahawk + SR71B) and am enjoying them very much (especially the Tomahawk). I am going on vacation soon and want to cut down on the amount of gear I take in my hand luggage. Going out to Cyprus last year they made me unpack and show what everything did, I had 2 portable amps + case of about 50 various opamps + ipod + Clas + iMod + cables and interconnects + ES5's + K702's + chargers/USB's + laptop. All neatly packed to begin with then thrown back into backpack in haste because we were late boarding. This time I have my iMod and Tomahawk (Strapped) + SR71B + ES5's and less stress.

 

I may well sell off the PB2/Fi-Quest/P4 and quit rolling for good.........

post #4103 of 4703
Quote:
Originally Posted by SpudHarris View Post

My name is Nigel (spud) and I'm.........a...........recovering addict.

 

I know this is blasphemy here but I'm trying not to roll at present. I have picked up a couple of RSA amps (Tomahawk + SR71B) and am enjoying them very much (especially the Tomahawk). I am going on vacation soon and want to cut down on the amount of gear I take in my hand luggage. Going out to Cyprus last year they made me unpack and show what everything did, I had 2 portable amps + case of about 50 various opamps + ipod + Clas + iMod + cables and interconnects + ES5's + K702's + chargers/USB's + laptop. All neatly packed to begin with then thrown back into backpack in haste because we were late boarding. This time I have my iMod and Tomahawk (Strapped) + SR71B + ES5's and less stress.

 

I may well sell off the PB2/Fi-Quest/P4 and quit rolling for good.........

Or get a VAMP and cut it down even more. But they may think its a modified cellphone, and that its an explosive, or controls an explosive.

post #4104 of 4703
Quote:
Originally Posted by SpudHarris View Post

My name is Nigel (spud) and I'm.........a...........recovering addict.

 

[snip\

 

I may well sell off the PB2/Fi-Quest/P4 and quit rolling for good.........

 

I hear you Nigel!  I managed to go about 16 days without rolling, prior to ordering and receiving the LME49990s, recently - and they are so nice (with HA5002s in the PB2), I'm thinking I can ignore my other op-amps forever (maybe)!   rolleyes.gif  But seriously, they sound so much better than my next favorite combination, across multiple genres of music, I'm feeling content to stop experimenting.  

 

Unlike you, my obsession is not facilitated by an ability to solder SOIC packages to DIP 8 adapters!   

 

Now, please point me to a link where you've compared the Tomahawk and SR-71B to the PB2!   Or send me a quick PM!  

 

Finding people who have direct experience with both the the SR-71B and the PB2 is next to impossible.  I've heard that Ray Samuels covers his op-amps with paint to protect his designs, and I can respect that, but I'm curious what you're hearing - I'm thinking he must be using something other than neutral-sounding op-amps like AD797s (Meir Concerto and Classic) or OPA1611s (Meier Stepdance) - going by reviews which say that the SR-71B has the RSA "house sound" - warm, not neutral.

 

popcorn.gif

 

Thanks,

 

Mike

post #4105 of 4703

So do all of the OP-Amps need to be soldered to a DIP adapter?

post #4106 of 4703
Quote:
Originally Posted by zilch0md View Post

 

I hear you Nigel!  I managed to go about 16 days without rolling, prior to ordering and receiving the LME49990s, recently - and they are so nice (with HA5002s in the PB2), I'm thinking I can ignore my other op-amps forever (maybe)!   rolleyes.gif  But seriously, they sound so much better than my next favorite combination, across multiple genres of music, I'm feeling content to stop experimenting.  

 

Unlike you, my obsession is not facilitated by an ability to solder SOIC packages to DIP 8 adapters!   

 

Now, please point me to a link where you've compared the Tomahawk and SR-71B to the PB2!   Or send me a quick PM!  

 

Finding people who have direct experience with both the the SR-71B and the PB2 is next to impossible.  I've heard that Ray Samuels covers his op-amps with paint to protect his designs, and I can respect that, but I'm curious what you're hearing - I'm thinking he must be using something other than neutral-sounding op-amps like AD797s (Meir Concerto and Classic) or OPA1611s (Meier Stepdance) - going by reviews which say that the SR-71B has the RSA "house sound" - warm, not neutral.

 

popcorn.gif

 

Thanks,

 

Mike

 

Hiya Mike,

 

not really written notes on the difference/similarities of the PB2 and SR71B. I should really do this.

 

The Tomahawk is the most surprising amp I've ever owned, worth so much more than they sell for on the used market. I have used it with full sized cans and it's good and despite it's size it will still power the LCD-2's, however, it really brings IEM's to life. It's hard to explain really, but it has resolution and depth with IEM's that I have never heard before. I bought it because someone came to pick up my D7000's from my house and I let him audition them with my amps, in return he let me try his Tomahawk and although I didn't say much at the time, I knew after 2-3 minutes that it was something special.

 

I'll pm you with details of the SR71B because that is a different beast altogether and fed balanced from my M-Dac is as good as any high end amp I've heard. It even powers the HE-6 with authority.

 

Give me a few days to make some notes.

 

All the best - Nigel

post #4107 of 4703

Thanks Nigel!   No hurry!

post #4108 of 4703
Quote:
Originally Posted by SecrtAgentMan View Post

So do all of the OP-Amps need to be soldered to a DIP adapter?

 

No, there are a few out there that are manufactured in the ready-to-use DIP 8 form factor, but most modern op-amps are SOIC format.  Somebody please step in if I've said something incorrect, here.

 

Mike

post #4109 of 4703

Great to hear ^^

 

So I've been reading through the thread and I still can't come to a conclusion as what to get.

 

I listen to some bass heavy music, and I'd like for soundstage and sound positioning to be present as well if possible since I do game with these headphones.

 

Currently I use the ATH-M50s. If anybody could give me a recommendation that would be great.

 

Thanks.


Edited by SecrtAgentMan - 7/17/12 at 5:51pm
post #4110 of 4703
Quote:
Originally Posted by zilch0md View Post

 

No, there are a few out there that are manufactured in the ready-to-use DIP 8 form factor, but most modern op-amps are SOIC format.  Somebody please step in if I've said something incorrect, here.

 

Mike


Don't forget about the ones that are TO-99 which are metal caps. That needs to be put on To-99 to dip-8 adapters to be used. Tho some Bent them and place them directly inside the dip-8 sockets. Which I wouldnt do.

New Posts  All Forums:Forum Nav:
  Return Home