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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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OVERVIEW

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
Heavy-duty steel chassis
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

Displaying reviews 1-20

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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 2 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.

(1 of 1 customers found this review helpful)

 
4.0

Great Tube Tone

By GuitarLoverABQ

from New Mexico

Sounds and responds like a classic tube amp. Easy to use, solidly built, but the tones are what I love the most. It works great giving some extra overdrive options in front of a Fender Blues Deluxe, as well as in the 'practice rig' - placed in front of an RP300A (which has a good Tweed amp sim, but the SFX-03 adds great tube tone, response and character). I've had this pedal for 2 years now and did have to send it to SD for a tube replacement earlier this year, but it was quick and easy and took less than a week. Use your ear to dial in tones and you won't be disappointed. For really high-gain stuff, look elsewhere, but if you like blues and classic rock tube tones, you owe it to yourself to try one!

(1 of 1 customers found this review helpful)

 
5.0

Ain't goin back to solid state

By Fretter-L8Kc3

from Boston, MA

I own the Seymour duncan SFX-03 Twin tube Classic Preamp. It makes my LP Shine and Scream. Also the philips tubes inside are military Spec, that means they can take bitter cold. They just shine. I tried the TS-808 with a bad amp terrible, Then I tried this with a bad amp too, wow I was in Nirvana with a cheap amp.

(1 of 2 customers found this review helpful)

 
1.0

Worst I've ever owned

By Mike d-NDeWs

from Chicago

This thing has the worst sound I have ever heard.The twin tubes art not interchangable. I'm Not sure what they were thinking when the designed it. I had a 5 watt practice amp that sounded better. Not worth the money at all.

(1 of 1 customers found this review helpful)

 
5.0

A Must Have

By WNMC Telemann

from Michigan

See all my reviews

Ask me a question

I've purchased 'tube' pedals in the past and have always been disappointed. I was naturally skeptical about this little offering, but the idea of channel switching intrigued me so I bought one from ebay at quite a deal. THIS THING ROCKS!! I run it straight into my Fender Blues Junior, effectively turning it into a 3 channel amp. Add a boost pedal and you have an infinite array of rhythm and lead choices. The Twin Tube will cover all tones from cleans to Nashville to creamy Clapton to AC/DC. I intended to use this with my practice rig only, but the choice of tone and ease of use helped this little preamp find it's way to my gigging rig. I rated the value 4.5 because it may be a little pricey, but then something this simple and versatile doesn't come cheap. Highly recommended!

(1 of 1 customers found this review helpful)

 
3.0

Mud In Your Eye

By siredifice

from Lancaster, PA

I read the other reviews and bought this pedal with high expections. However, the number one reason that I'm going to return this pedal is because of it's oversaturation of the bottom end, even at low gain levels, which makes it extremely muddy and the notes become hard to distinguish from one another. It sounds a lot like a 70's bass guitar with a fuzz box on it. Metal and rock players beware!! I ran my Strat, Tele, Parker, and Gibsons through it with the same results. If you like the tone of guys like Satriani, Vai, or VanHalen you definitely won't find it here. Think 1970's Grand Funk Railraod or CCR.

(1 of 1 customers found this review helpful)

 
5.0

The Best

By PANICK/ Stickypistil.com

from N.M.

First off, I complain about everything, the few reviews I've written for this site were so mean that they didn't publish them. But I LOVE this box! I own some of the legendary Overdrives, A mesa V twin, Chandler rackmount tube driver, Maxon OD808...This little duncun box Easily bests them all. It's much punchyer thanh the Mesa and not so compressed, It doesn't have quite the endless sustain that my chandler does but it responds to my hands way more. The Harmonic resonce is amazing, the tone is fantastic. I play Seymore Duncan seth lovers on two of my guitars (heritage 170, Heritage 150) and a CE PRS from the early 90s , And I have a stock Tele from the 70s and a strat plus.. This little box loves them all, but it's especially fond of the seth lovers, they seem to be made for each other, A match made in heaven!! (actually a match made at seymore duncan)I use pretty top shelf tube amps (Matchless chieftan, Boneyard custom class A, Fender blues JR) and this thing really loves them all, having two gain stages is with independent control is great which is why I always carried a Mesa Vtwin , But I like this better, it's simpler and actually just sounds and responds better than the Mesa Vtwin.I'm Stnned.I'm buying another one and putting away before they change this or discontinue it.

(1 of 1 customers found this review helpful)

 
5.0

The Holy Grail of effects pedals?

By Blues every day

from Scottsdale, AZ

This product and price is an exceptional value. There's nothing like a tube powered preamp and in my view it outperforms all other distortion/overdrive pedals. My gear: American Deluxe Strat with SCN pickups and S-1 switching and stock Peavey Delta Blues 30 watt with 15-inch Blue Marvel speaker. My pedal chain is now: Guitar, Boss TU-2 chromatic tuner, Boss CS-3 Compression Sustain, Seymour Duncan Twin Tube Classic, and amp. Boss Chorus and Boss Delay are in the effects loop. The Twin Tube Classic has true bypass and makes it easy to setup for three-channel operation. For example: Set amp to "clean," set the Twin Tube rythym channel to "slightly dirty" and then the Twin Tube lead channel to "more dirty." Everything is controlled with the Twin Tube's two footswitches. If needed, I can use the amps channel select footswitch for more possibilites. This setup covers everything from clean Strat blues to ZZ Top. The Twin Tube does not run with batteries so live performers will need a power source nearby. Also, the Twin Tube works very well with solid state amps. (Sounds amazingly good through my Marshall MG Series 15 watt CDR.) My Boss BD-2 Blues Driver was sacrificed towards buying the Twin Tube and while there's no question the Blues Driver is one of the best pedals ever made, the Twin Tube offers a higher quality professional sound. I highly recommend a test drive of the Twin Tube Classic and suspect that it will become one of the hottest new effects pedals on the market very soon. The only question is whether Seymour Duncan can keep production levels high enough to meet demand.

(1 of 1 customers found this review helpful)

 
5.0

Exactly what I needed!

By PunchthatCrunch

from Albany, GA

Just got this pedal in the mail today and hooked it up to a Peavey Classic 50 (clean channel). Made my Strat sound excellent. Sounded very similar to Fender Hotrods. Had that long sustain with warm, smooth, overdrive...near perfect mids. Man, this thing is powerful, too! The volumes are very responsive and give a wide range. I definitely recommend this pedal for someone who wants to beef up their single-coils, or to just plain make any amp sound better.

(1 of 1 customers found this review helpful)

 
3.0

A Llet Down,,,

By Lucidology

from Monterey, CA

See all my reviews

Had high hopes for this pedal..the hype was simply over the top...the High gain was very flabby/boomy sounding in the bass, & found it simply unusable...However, the low gain part is very nice..but it's not worth it just for that..The H & K Tube Factor is a much better product when it comes to a tube pedal

(1 of 1 customers found this review helpful)

 
5.0

duncan scores a winner

By Frog-joarz

from rochester ny

See all my reviews

Thank you Seymour! I just got my SFX-03 and I couldn't be more thrilled. I have a Fender Strat HSS-LT running through a Fender Deville and an XT Live. What the XT Live lacks in a really good tube overdrive, and the Deville lacks in good sounding overdrive theSFX-03 delivers in a way that just gives me chills. Put the sfx in front of the xt and you have a full palette of color to work with plus retain all the cool features on your xt. My rig has never had such depth and range of tone to just blow you away!

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