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Wow!(Max 700 inside)

C

coffinbuilder

Feb 9, 2010
38
0
Modesto
www.myspace.com
#1
So I've had this Peavey Max 700 for about 4-5 years now.About 3 years ago It went down and I never bothered to fix it or anything like that since I wasnt doing too much live work.I decided last month to open up the front panel and see what was goin on in there.And I found 6 socketable IC's.I seen one of them fell off so I put it back in and it sprang to life and worked fully functional

Then I decided you know... maybe I should just buy some new socketable IC's I mean I figured what harm could it do.So I ordered them last week.And they just got here today.So I take the old ones out and install the new ones..

Now idk what the heck this did really .. but WOW.. the amps controls are infinitely more responsive.And its louder too Much much louder The gain on the amp is atleast triple what it was. I use to have to press the gain up close to max and have the Volume master knob up pretty high to get it really rockin loud. Now I get the same volume if not more with both knobs set at 2-3.Like I said I dont know exactly what this did but it made a world of difference.

sounds better.Louder and again the controls are much much more responsive.
 
#4
Wow really?! the IC's get weak? Holy crap! well that could very well liven up many other existing amps if that happens to be the case.Yes I replaced them with the same ones I got them off Invalid Link Removed. They are
8-DIP_DIP8%20Pkg.jpg
BA4560's. After that print it has an H## after it but the two sets of numbers were different on the IC's they were all the same to each other.But the new ones were different than the old ones.They fit in nice and tight as they should and like i said when I turned it back on wow.. what an incredible difference.

My thing is if IC's do get worn out .. and the difference is so huge after only probably 6 years or so this head being up then I'd assume that 10-20 year old solid state heads could be in much much worse shape?
 
#6
What you are showing is a picture of a standard 8 pin dual in line package. The 4560 is a dual bipolar Op-amp. If your replacement says 4560 it's basically the same part.

I have never had a socketed IC fall out! The open loop gain of an average op-amp should compensate for any drop in individual transistor gains in an audio circuit. Changing out ICs will, in most circumstances, produce very little, if any, audible difference. There are folk who POOGE (Progressive Optimization Of Generic Equipment IIRC) their gear but I believe that the results would be subtle at best and unheard from a stage.

I suspect that what you are hearing is a better contact between IC pins and socket.

Whatever the reason: enjoy. :)

Paul
 
#7
I'm not exactly sure what it was but I know for sure that all the controls felt more responsive and also that the gain on the volume and gain knobs themselves were much much higher than before.I could never drive my bass into distortion with using the gain knob even at max.Now I can get plenty of grit into full on distortion fairly easily.I wasnt expecting it to sound or be any different than it was before but it is and I'm glad it is!Sounds noticably better to my ears atleast
 

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