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Topic: Twin Reverb Vol/Tone Adjustments
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Pete Burak Member From: Portland, OR USA
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posted 18 April 2001 09:00 AM
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Hey Gang, I noticed that when you turn all the tone knobs on a Twin to "0", you get no sound, even if the the volume is on "10". I have an early '70's Twin that I've been running the master volume on 10, the reverb channel volume on 8, and the tone knobs all around 4-5. I like this sound alot. I havn't tried it with both volumes on 10 yet. Anyone else running thier Twin like this?
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C Dixon Member From: Duluth, GA USA
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posted 18 April 2001 10:56 AM
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Pete,You bring up an interesting point. I dont recall how I set the Controls on my Fender twin years ago. But I will share some trivia with you. The Fender Amps of old did something that I don't recall ANY other amplifier manufacturer doing. They had special volume and tone pots made where MOST of the change occurred near one end or the other. I always felt Leo did this as a marketing ploy. I do NOT know this to be a fact. I will explain. If you turn the volume control from 0 towards 3, the volume emitted from the amp is increased drastically. However, beyond 3, NOT much happens. In other words you reach pretty close to maximum volume real soon. The same is true pretty much with the tone controls. Other amplifiers had a more gradual (linear) change when volume and tone controls were turned. So it was not uncommon to hear this comment among users, "my friend has to turn his Gibson amp all the way to 10 to get the volume I get on 2!" True statement! Only problem was, that Fender would have sounded only SLIGHTLY louder if he had turned it all the way up to 10. So go figger  One very nice thing about the Peavey amps is, their tone controls work like one would expect them to work. That is, at 12' 0clock their affect is flat. Going to the left of this position takes away treble, mid or bass respectfully. And going right adds to treble, mid or Bass respectfully. And anyone listening has NO doubt about the end result of what was coming thru the speaker. On most other amps it was not uncommon (Fender included) for one to wonder if much was happening, IF at all. My hat is off to Peavey for this. They did it right in my opinion. carl |
Pete Burak Member From: Portland, OR USA
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posted 18 April 2001 11:52 AM
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Hi Carl, I have definatly noticed that most of the Tone change in the Tone controls occurs over a small portion of the dial spectrum. That's kinda how I got to this setting. I noticed that the tone controls were mainly changing tone around the 3-5 positions, which let me crank the volume way up. If I put all the Tone controls at 10, the volume only needs to be set around 3 or 4. I found the Fender Twin Reverb sound I was looking for was easier to get with the volume cranked and the tone knobs backed off. Interesting. |
Donny Hinson Member From: Balto., Md. U.S.A.
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posted 18 April 2001 02:48 PM
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I haver noticed this "sensitive spot" tendency of all amps. Even my Peaveys have it, maybe to a lesser degree, but it's there nevertheless. But, one thing you must remember is that there is no way to quantify that "flat response" everyone talks about (in the real world). You can get (relatively) flat response in the amp, but when it goes to the speaker, your nice flat response curve (if there is such a thing) is gone. No speaker made has flat response, or really anything even CLOSE to flat response! So, setting those knobs at high noon, and calling it "flat" may give you a warm feeling, but you're no where near "flat" as far as the actual sound you're hearing. Add to this the differences in people's hearing, room acoustics, and cabinet design, component aging, and myriad other factors, and you begin to see that the is no such thing as "flat response" in the real world. The purpose of the controls in the amp is to give variations in the sound. As long as you can get the sound you want, the "linearity" of the controls may give you bragging rights and make you feel good, but it actually adds nothing to your sound. I've yet to try any amp where the controls were too "sensitive" for me. If there's a good sound in there at all, I can find it! When I set the controls on my BF Twin Reverb, I turn the volume and bass all the way up, set the mid somewhere between 0 to 3, and then use the treble control to set the overall tone. Usually, somewhere between 2 and 4 works fine. |
B Cole unregistered
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posted 18 April 2001 09:24 PM
If I remember right the volume on the twin was front loaded meaning from 1 to 5 the volume was real strong to make you think you had a real hot amp. Of course that didn't matter much since I put every thing on ten and let er rip made all the adjustments on the guitar. Them old twins were sure fire balls |
Bill Terry Member From: Bastrop, TX, USA
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posted 19 April 2001 07:31 AM
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Probably worth noting that the more the volume is increased, the less the bright switch affects the tone. You are effectively sending more signal around the capacitor. When the volume is on 10, the bright switch is virtually bypassed. ------------------ Home Page |
C Dixon Member From: Duluth, GA USA
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posted 19 April 2001 01:28 PM
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Bill you are 100% correct. In fact if you run the control to maximum the "brite" switch has NO affect. Reason being the capicitor is completed shorted out then, as you said.Also, to readdress my comments on the usage of the word "flat", re; Peavey Amps. The opposing poster was correct in this respect. Yes, speakers, enclosures and room acoustics (or the lack thereof) does alter the term "flat". However, it is still best in understanding the mysterious world of amplified sound to have a reference of some kind. Lest you float in a vacuum of space in understanding. A common anamoly in the world of education. When I refer to the tone controls as being flat on a Peavey amp at their 12 o'clock position it is a relative term. And what it means is that with a given speaker and given room acoustics, it is a good starting or "flat" place to begin with. Then one can lower (or increase), the treble, mid or bass controls to taste. And on a Peavey amp they do what they were supposed to do unlike many other amp manufacturers did and do. The Peavey amp was again one of the first to permit us such latitude. And while there are 5 controls in a psuedo parametric layout, it gives the player a better way to achieve his desired sound than methods such as the old Fenders. IMHO Incidently if one excludes PU's, Speakers and acoustics, the amp IS flat when the controls are in the 12 o'clock position. And the main reason the controls are there is to get around what speakers, pu's and acoustics does to this flatness. So to summarize, the poster was indeed correct, along with the above carl [This message was edited by C Dixon on 19 April 2001 at 01:29 PM.] |
Donny Hinson Member From: Balto., Md. U.S.A.
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posted 19 April 2001 03:19 PM
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Thank you Carl for that elaboration. And, of course, you are right. The twelve o'clock settings are an excellent reference point to start with. My post was not meant to disagree, but merely to inform the "newbies" (all us old-timers already know this) that there are indeed differences in the "flat" settings from one amp to another. If there weren't, then all amps set thusly (even different models) would sound the same!  |
B Cole unregistered
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posted 20 April 2001 06:10 AM
Man it'd a good thing you guys are around. Carl and Donnie and Jack and the rest of you over educated guy thanks for being here. And thank for all the input |
ajm Member From: Los Angeles
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posted 23 April 2001 01:02 PM
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If you look at the schematic you'll see that in the Twin (and most amps, for that matter) the tone controls are actually volume controls for certain frequency bands. That's why when you turn them all off you get no sound. You'll also find that with the amp volumes wide open you'll never get as much distortion with the tone knobs down as when they are turned up. The reason is that there is less signal getting through to the later stages to add to the overdrive.Also, when the volume knob is down you may find that you need to turn the reverb up higher to get the amount of effect that you like. This is because the the volume control is before the tap for the reverb circuit, and when the volume is down you are not driving the reverb springs as hard. Conversely, you may also find that when you turn the volume up that you need to turn the reverb down, lest it become too overbearing. I personally like to keep the tones up as much as possible. But depending upon the amp or situation I usually back off the treble to get rid of some harshness or that "icepick in the ear effect", back off the bass to lessen the boom or mud, or turn down the mids to get some more "air" and get rid of some of the "honk".
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Robert Member From: Champaign, IL
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posted 23 April 2001 06:00 PM
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I'm with AJM on this: with the guitar volume all the way down, I roll off the treble until the "hiss" seems to fall off. About "6" on my Twin Reverb. I use the bright switch to compensate for the reduced treble, and because I seldom push the volume past 5, 6, or 7 - it still works. Middle runs at 4 - for the mid-range scoop Leo liked, and bass at 8, for whoomph and warmth. Those settings sound good with a Strat and with a Dual Professional. The reverb changes around a bit between three and five. Some of these amps have better 'verbs than others. I don't know if it would be a function of the tubes completely - but I've A/B'd with friends, and they always end up wanting my amp . . . . Really, it's the Chevrolet 350 V-8 of guitar amps. Rob |
Jody Carver Member From: The Knight Of Fender Tweed~ Dodger Blue Forever
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posted 02 May 2001 07:32 PM
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Robert,,,,well said,,,,a great analogy a 350 V8 Chevy Engine 4 bolt and a Twin as you describe...dont forget the "sport suspension" great handling,,,,amen | |