14 Opamp Chips Tested with Timmys----Judge for yourself in audio test

Angle Loss

Member
Messages
1,503
I decided to make a little clip of 14 different chips being used in my twin Timmys to see what difference they made. Follow the link for the clips. One is just the soundclip, and the other (labeled) has audio labels for the chips. The clip was made with a alder/maple strat, Suhr p/u's (first n+m, then just neck) into a '65 Princeton NR w/ Weber alnico, miked with a Sm57 about an inch off the grill, mostly on axis, off the cone maybe an inch. The two Timmys are set with all knobs straight up noon. Generic classic rock noodling ;)

http://www.soundclick.com/bands/default.cfm?bandID=471217&content=music edit: link has been changed to soundclick.

I was curious and figured the community here would be as well. Hopefully it will be a useful resource for you guys on picking chips out.

-Chris
 

Funky Monkey

Supporting Member
Messages
3,360
Wonderful! Very well done. Thank you for taking the time.

What I come away with is that I probably couldn't tell if a chip was swapped between the time it would take to get one out and another one popped in.

Don't get me wrong- I do hear differences. But none are bad, or better, or worse. And none screw with the main audible character of the pedal. I know from past experiments that feel is one of the factors, but also only negligibly. I'll trust Paul and stay with the one he popped in there.

Thanks again. Very cool undertaking.
 

dbx

Member
Messages
2,736
Nice work! You even got the Eternity "mystery" chip in there...how did you do the swaps so seamlessly? (or is that good editing?) I wonder if more differences would be apparent at the higher end of the gain/drive range...thanks for the reference...:cool:
 

Angle Loss

Member
Messages
1,503
Thanks guys. Some of the differences can be pretty subtle. I do love the TL072ACN though in the Timmy. The LM11458 is nice also and a little bit warmer. I just wondered exactly what they would sound like all together to see if what I percieved seperately was true. I swapped two chips at a time with the both Timmys. It still took a long time, but was much faster than one at a time. I did test some of them at higher gain settings, but didn't feel there was as much difference, plus I use other pedals for higher gain anyway. Please keep the observations coming, I think it is interesting to find which chips everybody likes/dislikes.
 

jb1911

Member
Messages
5,192
I like the JRC 4559 clip and the TL072ACN clip.

Thanks for taking the time to help everyone else.
I totally agree. I did the same test myself without the clips and I came to the same conclusion. I'm glad to have these clips to back up what I found. Thanks a ton for doing this.
 

dividedsky

Member
Messages
4,252
Great clips. When I ran through a bunch of opamps on the Timmy a while back I decided that I liked the original the best. I felt the same way from your clips.
 

Angle Loss

Member
Messages
1,503
I never felt that the Timmy was great for leads but loved it for rhythm work. The TL072 made it feel better for leads for me. That is one of the harder things to communicate in clips is how each affects the feel. For instance, the JRC4458 and TA7558 felt congested in the midrange, whereas the LM1458 and RC4558 were clearer.
 

Angle Loss

Member
Messages
1,503
Most opamps I get from Small Bear Electronics on the web. The TA7558 came out of a 1985 TS-9 Tube Screamer. Funny thing is it didn't sound too bad in the Timmy but it was absolutely wretched in the TS-9!
 

brianf

Member
Messages
1,431
First, thank you for the hard work!!!!

To me some siound the same. I could not tell the diff but after a few listens the TL072ACN stood out for me.

brianf
 

aeonlux

Member
Messages
371
Thanks for this. I listened 5 times over, taking notes on the last 3 passes. Of all of them, I have two faves:

#1 - "cleaner" = TL072ACN - I loved the overall balance, chord definition, and singing quality of the lead tone.

#2 - "pushed" = JRC4559 - A very musical (to my ear) saturation and character.


cheers,
Ian
 

cber1517

Supporting Member
Messages
1,659
♪♪♫♫♪;4919787 said:
Anyone ever tried this with an MI Audio Blues Pro?
+1 - Does anyone use the LM1458 in their Blues Pro?

:munch
 

odourboy

Member
Messages
664
Thanks for doing all this work. You've pretty much demonstrated what I've felt for a while... the differences are more subtle that some would have you believe. :dude
 




Trending Topics

Top