schematical differences between ampeg V4 and V4b

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schematical differences between ampeg V4 and V4b

Postby methodofcontrol on Wed Mar 22, 2006 5:32 am

schematical? is that even a word? i'm an idiot.
anyway...any who's ever heard a V4B and V4 back to back can tell you that the difference is more than just the lack/presence of reverb.
the V4B's i've heard have a massive lowend that the V4's just don't have. and i'm wondering where the difference is in that circuit? is it a matter of filtering? or perhaps the fact that the signal is routed slightly differently owing to the lack of sensitivity switches and reverb tank? or maybe a different output transformer was used. does anyone have this info? i woud like the second input on my V4 to emulate the V4B sound. thanks.
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Postby Bryan James on Thu Apr 06, 2006 8:44 pm

on the preamp side, on channel one, the filter switches are done differently between the v4b and v4. on channel two there are alot of differences between the the amps

on the poweramp, not to much diffence between them

v4
pre http://www.schematicheaven.com/ampegamps/v4preamp.pdf
power http://www.schematicheaven.com/ampegamps/v4poweramp.pdf
v4b
pre http://www.schematicheaven.com/ampegamps/v4bpreamp.pdf
power http://www.schematicheaven.com/ampegamps/v4bpowramp.pdf
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