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Product 159341

Seymour Duncan SFX-03 Twin Tube Classic Preamp Pedal   

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The SFX-03 Twin Tube Classic preamp pedal delivers all the gain and smooth tone you'd expect from a high-quality tube preamp. The high-plate voltage ...Click To Read More About This Product

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Boutique-quality tone for the working musician!

The SFX-03 Twin Tube Classic preamp pedal delivers all the gain and smooth tone you'd expect from a high-quality tube preamp. The high-plate voltage and 100% vacuum tube signal path allow the 2 - 6021 dual-triode tubes to operate at their fullest potential and provide maximum dynamic range. Two channels expand the tonal possibilities of this preamp even more, from glassy, smooth clean tones to warm crunch with tons of bite. Power supply included.

FEATURES
  • Uses two premium, military-spec, subminiature, USA-made Philips-Sylvania 6021 dual-triode tubes
  • High-plate voltage
  • 100% vaccum tube signal path
  • Two channels
  • True bypass
  • Fully encapsulated toroidal transformer for quiet operation
Reviews
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Review Snapshot

by PowerReviews
 
4.3

(based on 49 reviews)

Ratings Distribution

  • 5 Stars

     

    (31)

  • 4 Stars

     

    (9)

  • 3 Stars

     

    (5)

  • 2 Stars

     

    (3)

  • 1 Stars

     

    (1)

Most Liked Positive Review

 

My newest tube amp

I often play small rooms which mean lower volumes and tighter spaces. I've tried playing direct with my effects but always missed that extra my tube amps give. I've gotten smaller (Fender Blues...Read complete review

I often play small rooms which mean lower volumes and tighter spaces. I've tried playing direct with my effects but always missed that extra my tube amps give. I've gotten smaller (Fender Blues Jr.) and smaller (Epi Valve Jr.). I decided to try this. Put right on my pedal board at the end of the chain and straight into my direct box. I'm sold. I'd probably still rather play my Valve Jr into the 2-12 K120's but so far I've really felt I am still playing into a tube amp. I use this as an amp replacement rather than an effects pedal and in that role it performs very well.

VS

Most Liked Negative Review

 

Only one useful mode at a time

If it had separate tone stacks per gain channel then I would easily see this being a very cool box. If you are looking for really high-gain sounds, maybe it would work for ...Read complete review

If it had separate tone stacks per gain channel then I would easily see this being a very cool box. If you are looking for really high-gain sounds, maybe it would work for you. I'm primarily looking more for a bluesy tone now and I just can't get it out of this, certainly not two of them. As it is, I can only get one good tone out of it at a time and that tone has more gain than I like. If I hadn't had to wait so long before trying it out I would have returned it.
Features are OK for the price. It had what I was looking for, the ability to switch between two different gain structures in one box.
Seems well built. It would be pretty hard to destroy it.
It is a little pricy for what it is, considering some small tube amps cost less.

Reviewed by 49 customers

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(3 of 3 customers found this review helpful)

 
5.0

My newest tube amp

By mondronttigger

from Shenandoah Valley, VA

See all my reviews

Ask me a question

I often play small rooms which mean lower volumes and tighter spaces. I've tried playing direct with my effects but always missed that extra my tube amps give. I've gotten smaller (Fender Blues Jr.) and smaller (Epi Valve Jr.). I decided to try this. Put right on my pedal board at the end of the chain and straight into my direct box. I'm sold. I'd probably still rather play my Valve Jr into the 2-12 K120's but so far I've really felt I am still playing into a tube amp. I use this as an amp replacement rather than an effects pedal and in that role it performs very well.

(2 of 2 customers found this review helpful)

 
5.0

Get the Classic Sounds

By TeleMan-Wza1T

from Reno,NV

I've had this unit for about a year and just love the tone I get. It can get the old classic sounds from CCR to Clapton, Hendrix, Page, Beatles or anything in-between. Sounds especially good with a BBE Sonic Stomp or MXR Dyna Comp in front. I recommend the SFX-03 Twin Tube Classic highly.

(2 of 2 customers found this review helpful)

 
5.0

Tube me? well, Tube you x 2

By J blues

from FL

See all my reviews

I bought this used to save some cash and to beef up the sound of an old Line-6 Spider 75watt solid state amp I was considering selling...until I paired this pedal with it. Now its like a new amp and lots of fun again. Just like it's name states it is well suited and voiced for "classic rock" sounds and not as aggressive / high gain sounding as the Ibanez Tube King. I found the Twin Tube to be much more quiet (as far as unwanted background hiss) than the Tube King as well. The Twin Tube has a unique wall wart that is 16V "AC" which the manual states enables it to act like the pre-amp of a true tube amp and not required to run in "staved plate mode". I like Semyour Duncan pickups and glad I gave one of their pedals a try. I really like the 3 options it provides for rhythm ,lead and true bypass tones. The pedal appears to be well made with substantial weight = probably due to the internal transformer.I have not tried it with my Marshall or other tube amps yet but expect good things there too.Cons - It is a little pricey with a pretty large footprint plus has a unique power requirement.

(2 of 3 customers found this review helpful)

 
5.0

Awesome

By Jack AssHammer

from Buffalo

You just can't beat this peal. The sound quality is stellar. True tube tone. I've had 4 of these because I keep getting lured away with some seductive promise of a better sound/pedal only to come back and buy another one. I'm a pro player, these are just awesome.I gave it a 4 for features due to the lack of a mid control but hey my amp has a tone stack too. You will not get tone this rich with an op-amp.

(1 of 1 customers found this review helpful)

 
5.0

Excellent for my purposes

By Fresno Bob

from Fresno, CA

See all my reviews

I purchased this pedal only a week or two ago, but felt I had to make a comment. I use a line 6, Flextone III amp, which I love for its versatility and overall good tone, but which I felt doesn't quite capture the sound of a genuine tube amp, especially for some models. I mainly use channel 1 with the lowest possible gain setting and a high volume setting in order to help create more of a tube sound. As of today, I have not used it in conjunction with any effects other than those onboard the line 6.For the purpose of adding the right sort of color to my sound, I am very pleased. However, I should note that I was looking for a good sound that I liked and not necessarily something that necessarily reproduced specific tube sounds. The Twin Tube simply gives more bite and warmth to the sound which I enjoy, even if it is not an exact replication of the tube amps the line 6 is trying to model. I don't know whether this is because the Twin Tube uses a type of tube that is not the type customarily used in preamps, so I cannot advise as to whether using another type of tube preamp would render a more faithful recreation.I also liked the two-channel, footstomp design because that gives me the ability to have a boost channel or a dirty channel without switching between patches on the Line 6. The overdrive, when in use, is pleasing for quite a few uses, but I do not intend on relying on it for all of my overdrive needs. It is very earthy and warm at low levels, but, especially at higher levels, there seems to be a hint of a ragged, out-of-control sound to it. Almost as if it were a distortion or synth pedal. Don't read that to mean that it is a harsh or unpleasent sound, but it may not suit some or any of another person's uses.I marked it down some on features because I would have liked to see a mid-range parameter on the tone controls. I might even have liked to see independent tone controls for each channel. However, I didn't mark it down too far because I actually like the simplicity. If I actually did have more channels I would probably obsess about getting them perfect each time I played. This way, I don't mind that there aren't presets, (which is a feature I find extremely useful and employ in the rest of my gear) because I can very simply adjust the controls when needed.

(1 of 1 customers found this review helpful)

 
2.0

Only one useful mode at a time

By Byron Marsh

from Nashville

See all my reviews

If it had separate tone stacks per gain channel then I would easily see this being a very cool box. If you are looking for really high-gain sounds, maybe it would work for you. I'm primarily looking more for a bluesy tone now and I just can't get it out of this, certainly not two of them. As it is, I can only get one good tone out of it at a time and that tone has more gain than I like. If I hadn't had to wait so long before trying it out I would have returned it.
Features are OK for the price. It had what I was looking for, the ability to switch between two different gain structures in one box.
Seems well built. It would be pretty hard to destroy it.
It is a little pricy for what it is, considering some small tube amps cost less.

(1 of 2 customers found this review helpful)

 
3.0

Tubes are NOT user changeable

By Snagman73

from Ohio

See all my reviews

I think this thing sounds amazing. It is the most wonderful piece of gear I own. Only one problem. They didn't design it right. The tubes are not changeable without sending it to Seymour Duncan. Also the tube specs state that they will only last up to 1000 hours and if you play as much as I do that means every 1 to 1 1/2 years you will have to send it to get new tubes. Who knows how long and how much that will cost? Just something to think about.

(1 of 1 customers found this review helpful)

 
5.0

SFX - 03

By z9LHWjv0n

from Chandler, Arizona

When I Bought this pedal without ever actually hearing it, I was a little skeptical. Sure there was a lot of hype and talking about this thing but would it really give me that tubed, compressed sound that only the finest of Marshall stacks and vintage fenders can produce? YES! When this pedal arrived in the mail (Very promptly I might add) the first thing I noticed was its weight,. Its a very substantial pedal and can stand up to a lot of abuse (not recommended however). As far as sound goes, I agree that it is a little bassy but with a treble push on my amp it can sparkle! Great, creamy distortion from light fizz to all out chaos! Well, like some good Joe Walsh:)

(1 of 4 customers found this review helpful)

 
2.0

Dull

By TomOrrow

from PA

I just got this pedal in the mail today and it took about 2 minutes to be seriously dissapointed with it. The problem is that it sounds so dull. Even with the bass EQ turned all the way down and the treble maxed out it just doesn't have any tone in the mid or high range. I know what I'm talking about and wish I hadn't read the other 40 reviews here raving about this pedal. The tubes distort well but unless you want to totally change the EQ on your amp then this won't have any of the tone you are looking for. I put this next to my EH English Muffin (which absolutely smoked it), Paul Cochrane Tim pedal, Hermida Zendrive, and TS808. I play through a Bruno Cowtipper 90 and Bruno UG30 with power attenuators on both. This pedal sucks. Get a used English Muffin for any type of soft crunch to full on rip. Better yet, if you want classic distortion start pushing a 6v6 tube amp until it rips.

(1 of 1 customers found this review helpful)

 
4.0

Great Tube Sound

By Mike Abbaticchio - Locked IN Band

from Hazlet, NJ

See all my reviews

First... I have been playing for 29 years. This is a really good overdrive. Actually it is more like a pre-amp than an overdrive. I am feeding Crate Powerblocks and running through a variety of Boss digital effects. Problem I had was finding a good pedal overdrive that had tube-like response and this unit met that requirement. Only complaints are that the overall sound is bit bassy, so I end up either eq'ing it output or adding some chorus to brighten it up. I am playing Seymour Duncan humbucker equipped Fender Stratocasters. Unit is way too bassy for my Les Paul by itself, but sounds good with a treble boosted eq. Other complaint is the power supply. It is an ac power supply that has the same connector as a Boss 9V DC power supply, which makes it real easy to create an unfortunate accident. Would also be nice if the power supply was changed to a space saving configuration so it it can easily plug into an outlet strip. The ac adapter will tend to get very warm after a few hours of use as well. Overall, I will say it is the best sounding overdrive I have heard as far as pedals go. Really nice feature have a separate Lead and Rhythm channels. I have tried just about every Boss OD and distortion and this seems to be the solution.

Displaying reviews 1-10

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