#1
Have you ever heard of this? it seems cheap, 25 dollars shipped. which is much cheaper than any attenuater ive seen. from what i gather its basically adding a master volume knob to my classic 30. Any opinions on this
#3
wait im confused. My amp has pre and post controls. pre is generally gain and post is volume. with this i cant crank both? can i can crank my post amp and use this to bring the volume down
#7
well i mean for me i dont need one since i get to crank during band practice and gigs when i really want the good tone. and my practice volume tone isnt bad, but i wouldnt mind spending 20 if i could get a cranked tone all the time
#8
Yep, it's a master volume. Thing is, you already have a master volume. Your post-gain is the master volume. Reading some of the feedback, it seems to have some sort of an effect tho - but something like an EQ pedal in the loop with the output level low would do the exact same thing.
Quote by Lunchbox362
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#9
How exactly does that work, it wont work as a master volume unless you put it before the speaker and after the power amp, I doubt anything that costs £20 could handle that kind of power from the amp, it probably wouldnt work correctly in the effects loop either because usually only part of the signal is processed through the loop, all it would do is act like a volume knob on your guitar if you put it before your amp, so basically its just bollocks, save up for an attenuator.
#10
Quote by beckyjc
How exactly does that work, it wont work as a master volume unless you put it before the speaker and after the power amp, I doubt anything that costs £20 could handle that kind of power from the amp, it probably wouldnt work correctly in the effects loop either because usually only part of the signal is processed through the loop, all it would do is act like a volume knob on your guitar if you put it before your amp, so basically its just bollocks, save up for an attenuator.

Well, it's not exactly a master volume amp. But it does act a sort of a master volume on amps without master volume - that is, you can crank the preamp while keeping the volume low with the volume box. Pretty good for Fender Deville and such amps which (I think) don't have a master volume?

Are you thinking about parallel effects loops? Because I think the whole signal passes through series effects loops (I've used an EQ in the loop of my amp to make it more quiet).
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#11
Yer its what I meant by usually i wasnt sure if the peaveys loop was in series or parallel, im pretty sure the deville has a drive gain and drive volume control so you can get gain out of it.
#12
Ok I know this is an old post but I thought I would shed some light on the omnisonic since I have one and was going to post a review on it anyway. so I will just kill 2 birds with one stone


Don't get the Omnisonic confused with an attenuator like a THD Hot Plate or a Weber mass.
A power attenuator attenuates both the power amp and preamp side of a tube amp which goes in between the head and the Cab and dissipates the unused wattage in heat in order for you to get the full tone without making your ears bleed.

although this is not a power attenuator it does work passively in a similar fashion for your tube amps preamp side. if you are not sure what I mean by that a tube amp has 2 sides one side is the preamp side the other side is the power amp side which drives the speakers. The preamp side is where a great deal of a tube amp gets its rich tone but the power amp side also contributes to that when the volume or gain is pushed which causes the tubes to compress that creates a vacuum just as for the preamp tubes , anyway this is all tube amps 101 stuff but I just wanted to give others who may not be in the know a basic understanding of how tube amp works, Anyway....
The Omnisonic is basically a speaker attenuator or for a better term of describing it, preamp attenuator, which works in conjunction with a tube amps effects loop on the preamp side of the amp only. The the Omnisonics' input goes into the amps effects send and the output side goes into the effects return; I also have a multi effects processor in the loop behind the omnisonic (or first in the effects loop) in order to control any volume discrepancies of the effects processor.
you cannot hook this unit up the way you would an attenuator (between the amp and cab) you must hook it up in the effects loop. If your amp does not have an effects loop then the Omnisonic will not work.
if your tube amp does have an effects send and return then any of the Omnisonic preamp attenuators will work, they are not brand specific.

This little unit allows you to be able to crank the gain on your amp and still be able to get a good rich distortion and overdriven tone without having the amp up so fricken loud you can't stand it.
although you are not getting full tube compression from the amps power amp side the preamp tubes also produce a large percentage of the amps tone but unless you are able to crank the gain you cannot get that tone you want from the amp unless you don't mind your ears bleeding with the omnisonic in the loop you can crank up the gain in order to get that desired tone and still have full control of the volume output.

this unit is also very nice to have if you have a touchy gain knob like the one on my Crate V33 Head. this thing was so touchy without the Omnisonic, it was either way too loud or not loud enough to get any distortion at all, it was just hard to get the amp where i could get it to overdrive without it being so loud the neighbors was calling the cops on me and or running the risk hearing loss
the Omnisonic preamp attenuator solved the problem for me to where I can crank the gain on the amp and still have full control of the volume so with that said I think it as a very inexpensive solution for getting the tone I want out of my amp at low
volumes.
it is definitely worth 25 bucks IMO

now if you are needing to attenuate both sides of your amp then you are going to have to dig a little deeper in your pockets and the more wattage your amp is the more you will have to dish out for an attenuator that can handle your amps output therefore Ya this is a very cheap alternative.
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