
This diagram clearly illustrates Dirk Wacker's wiring mod for this month.
If you want the maximum tones out of an HSS-configured guitar, here’s how to wire the switching and eliminate two pet peeves from a basic auto-split wiring.
Welcome back to Mod Garage. This month we’ll have a deeper look into auto-splitting pickups on an HSS-configured Strat and similar guitars. We covered this a long time ago, exploring the basic version of this wiring in “Stratocaster Auto-Split Mod.” Today we’ll take it one step further with a pro version and discuss what can be done with it.
The HSS setup with a bridge humbucker plus two traditional single-coils is the perfect combination for many Strat players, but it’s not limited to Strats. With the bridge humbucker you have a powerful pickup for soloing and rocking the crowd, while the two single-coil pickups give you traditional sounds and everything in between. When you choose a bridge humbucker with 4-conductor wiring, you can even split it for more possible sounds and to also get the famous in-between “quack” tone with the bridge and the middle pickup together in parallel. That’s exactly where the auto-split wiring comes in when you want an easy-to-operate setup. Let’s have a look what can be done with such an HSS pickup configuration and a 5-way pickup selector switch.
Some players may not need the in-between pickup position with the bridge plus the middle pickup together in parallel. Maybe they can’t use this tone in their musical context, or they simply don’t like these slightly hollow tones with less output. Even Leo Fender himself never liked this tone that he called “out of phase” (which is technically incorrect). These players are fine with a standard 2-conductor bridge pickup and standard Stratocaster 5-way switching.
- Both coils in series (standard humbucker operation with full output)
- Both coils in parallel (a kind of hum-free, single-coil-like tone with less output)
- One coil shut down to ground (real split mode with only one coil engaged)
- With a simple 2-way toggle switch you can shut down one of the coils to ground to get an additional single-coil-like tone from the bridge pickup. This can also be used to get the in-between sound together with the middle pickup. You can also use any standard push-pull or push-push pot, or the Fender S-1 switch, for this operation, so you don’t have to alter the appearance of your guitar.
- If you want more, you can use a DPDT on-on-on switch like the DiMarzio “multi-sound switch” to get all three sounds from your bridge humbucker. This operation can’t be done from a push-pull or push-push pot—you need an additional 3-way toggle for this.
- If you want all four possible sounds from your bridge humbucker, an additional rotary switch is the way to go. We discussed this just a few months ago in “Mod Garage: How to Triple Shot Your Humbuckers.”
That’s where the pro version kicks in, replacing the standard 5-way switch with a “super switch” that has four individual switching stages instead of only two, eliminating the two peeves from the basic auto-split wiring.
Please note: This is only possible with a humbucker sporting 4-conductor wiring. You can’t do this with a humbucker with traditional 2-conductor wiring!
Of course, there are players who don’t need all the gadgets. They simply want a powerful humbucker tone in the bridge position and the typical traditional Strat tones from all the other switching positions, including the in-between position of the bridge plus middle pickup. The auto-split wiring is perfect for these players because it’s a set-and-forget situation.
What will happen without the auto-split wiring when dialing in the bridge humbucker together with the middle single-coil pickup in parallel? You won’t hear a big difference in sound compared to the bridge humbucker alone, simply because usually the bridge humbucker is a lot louder compared to the single-coil and will dominate the tone by out-acting the single-coil. To combat this problem, the auto-split wiring will automatically (hence the name) split the humbucker into a single-coil by shutting down the other coil to ground for a traditional in-between sound of both pickups, like we all know from a regular SSS-configured Strat. The switching matrix of the auto-split wiring looks like this:
- Bridge humbucker with both coils in series for full humbucker operation
- Bridge humbucker split + middle single-coil in parallel
- Middle single-coil
- Middle + neck single-coil in parallel
- Neck single-coil
Deciding what coil of the humbucker will be sent to ground leaving the other active could easily be the subject of a whole column. Depending on the winding direction and polarity of both pickups, you usually don’t want to end up with an out-of-phase tone when both pickups are engaged and when your middle pickup is RWRP (reverse-wound, reverse-polarity), you also want to have the hum-cancelling function this switching position can provide. So … choose carefully!
While the basic version of this wiring works great, it has some peeves that some players complain about:
- It’s not possible to freely arrange the dual tone controls. They are fixed to one for the middle and the other for the neck single-coil, leaving the bridge humbucker without any tone control, like in standard Strat wiring.
- You’ll have to use individual tone caps for each tone control.
That’s where the pro version kicks in, replacing the standard 5-way switch with a “super switch” that has four individual switching stages instead of only two, eliminating the two peeves from the basic auto-split wiring.
Good idea, but unfortunately the road to hell is paved with good resolutions.
The super switches are physically a lot larger compared to the standard version, so take care that they’ll fit into your guitar. Recently I had to upgrade an Ibanez HSS guitar with this wiring, and it was impossible to put a super switch in without extensive routing to make space for it. I had such problems before with Yamaha and Fender guitars. The PCB-based versions of this switch require less space, so often this is the way to go.
Often such extended auto-split wirings are trying to also handle what I like to call the “resistance paradigm.” Fender used 250k pots for their guitars with single-coil pickups in the early days, while Gibson used 500k pots for their humbucker-loaded guitars. I don’t think the resistance values were chosen for any tonal reasons. We’re talking about the 1940s and ’50s, when they simply didn’t have the choices we have today. Especially Fender used whatever was available in large quantities for a low price, and it’s likely that Gibson had a similar approach.
Today you can still find unfounded rumors all over the internet that single-coils sound best with 250k pots and humbuckers with 500k pots. While the basic idea behind this contains some truth (500k pots still leave some high-end with a humbucker while 250k pots prevent the single-coil from sounding too harsh), such rules are not set in stone and usually such debates totally neglect that we’re talking about a passive system.
Often 500k pots are used for an auto-split wiring, incorporating some additional resistors to “convert” them to 250k for the single-coil pickups. Good idea, but unfortunately the road to hell is paved with good resolutions. Digging deeper at this point is too much for this column but may be a good subject for a follow-up. My personal recommendation: Forget about it. In more than 20 years, I have tried every variation of such jack-of-all-trades wirings and not a single one really worked in a useable way. Here are my two cents regarding such a wiring:
- A good and useful distribution of the tone controls is one 500k pot for only the bridge humbucker and the other one 250k for the two single-coils.
- Using two tone caps (one for each tone control) is simply perfect for this wiring, i.e., I really like to use a small cap value for the humbucker to control the warmth of it plus a traditional value for the two single-coil pickups.
- Using a 250k master volume works excellent because in a passive system like a Strat, you can benefit from the much better taper regarding evenness compared to a 500k pot. The loss in high-end compared to a 500k pot is marginal: measurable, but not audible. Using a treble-bleed network is a matter of choice and up to your personal preferences.
The wiring layout seen in the diagram at the top of this page is what I recommend and that most players will be happy with, so here we go. I assume that the middle pickup will be a RWRP type, and as usual, I used the Seymour Duncan color code for the humbucker. If you have a humbucker from a different company, you’ll have to convert the shown color code with one of the converting charts online. The bare wire of the humbucker always goes to ground, no matter what type it is. I tried to keep the illustration as clean as possible by leaving out all ground wires, so, as usual, they’re shown with the international symbol for ground. Solder all these connections to the back of a pot of your choice.
That’s it. Next month we’ll build a cool and simple yet very effective diagnostic gadget for electric guitars and basses. I use it in my shop daily and you will love it for sure, so stay tuned!
Until then ... keep on modding!
- Three Must-Try Guitar Wiring Mods - Premier Guitar ›
- How to Get the Most out of Hum-Sing-Hum Wiring - Premier Guitar ›
- Guitar Shop 101: Coil-Tap an HSS Strat - Premier Guitar ›
A dual-channel tube preamp and overdrive pedal inspired by the Top Boost channel of vintage VOX amps.
ROY is designed to deliver sweet, ringing cleans and the "shattered" upper-mid breakup tones without sounding harsh or brittle. It is built around a 12AX7 tube that operates internally at 260VDC, providing natural tube compression and a slightly "spongy" amp-like response.
ROY features two identical channels, each with separate gain and volume controls. This design allows you to switch from clean to overdrive with the press of a footswitch while maintaining control over the volume level. It's like having two separate preamps dialed in for clean and overdrive tones.
Much like the old amplifier, ROY includes a classic dual-band tone stack. This unique EQ features interactive Treble and Bass controls that inversely affect the Mids. Both channels share the EQ section.
Another notable feature of this circuit is the Tone Cut control: a master treble roll-off after the EQ. You can shape your tone using the EQ and then adjust the Tone Cut to reduce harshness in the top end while keeping your core sound.
ROY works well with other pedals and can serve as a clean tube platform at the end of your signal chain. It’s a simple and effective way to add a vintage British voice to any amp or direct rig setup.
ROY offers external channel switching and the option to turn the pedal on/off via a 3.5mm jack. The preamp comes with a wall-mount power supply and a country-specific plug.
Street price is 299 USD. It is available at select retailers and can also be purchased directly from the Tubesteader online store at www.tubesteader.com.
Reader: T. Moody
Hometown: Myrtle Beach, South Carolina
Guitar: The Green Snake
Reader T. Moody turned this Yamaha Pacifica body into a reptilian rocker.
With a few clicks on Reverb, a reptile-inspired shred machine was born.
With this guitar, I wanted to create a shadowbox-type vibe by adding something you could see inside. I have always loved the Yamaha Pacifica guitars because of the open pickup cavity and the light weight, so I purchased this body off Reverb (I think I am addicted to that website). I also wanted a color that was vivid and bold. The seller had already painted it neon yellow, so when I read in the description, “You can see this body from space,” I immediately clicked the Buy It Now button. I also purchased the neck and pickups off of Reverb.
I have always loved the reverse headstock, simply because nothing says 1987 (the best year in the history of the world) like a reverse headstock. The pickups are both Seymour Duncan—an SH-1N in the neck position and TB-4 in the bridge, both in a very cool lime green color. Right when these pickups got listed, the Buy It Now button once again lit up like the Fourth of July. I am a loyal disciple of Sperzel locking tuners and think Bob Sperzel was a pure genius, so I knew those were going on this project even before I started on it. I also knew that I wanted a Vega-Trem; those units are absolutely amazing.
When the body arrived, I thought it would be cool to do some kind of burst around the yellow so I went with a neon green. It turned out better than I imagined. Next up was the shaping and cutting of the pickguard. I had this crocodile-type, faux-leather material that I glued on the pickguard and then shaped to my liking. I wanted just a single volume control and no tone knob, because, like King Edward (Van Halen) once said, “Your volume is your tone.”
T. Moody
I then shaped and glued the faux-leather material in the cavity. The tuning knobs, volume knob, pickguard, screws, and selector switch were also painted in the lemon-lime paint scheme. I put everything together, installed the pickups, strung it up, set it up, plugged it in, and I was blown away. I think this is the best-playing and -sounding guitar I have ever tried.
The only thing missing was the center piece and strap. The latter was easy because DiMarzio makes their ClipLock in neon green. The center piece was more difficult because originally, I was thinking that some kind of gator-style decoration would be cool. In the end, I went with a green snake, because crocodiles ain’t too flexible—and they’re way too big to fit in a pickup cavity!
The Green Snake’s back is just as striking as the front.
This hollowbody has been with Jack since the '90s purring and howling onstage for hundreds of shows.
Our columnist’s Greco 912, now out of his hands, but fondly remembered.
A flea-market find gave our Wizard of Odd years of squealing, garage-rock bliss in his university days.
Recently, I was touring college campuses with my daughter because she’s about to take the next step in her journey. Looking back, I’ve been writing this column for close to 10 years! When I started, my kids were both small, and now they’re all in high school, with my oldest about to move out. I’m pretty sure she’s going to choose the same university that I attended, which is really funny because she’s so much like me that the decision would be totally on point.
The campus looks way nicer than it did back in the ’90s, but there are similarities, like bars, shops, and record stores. Man, our visit took me back to when I was there, which was the last time I was active in bands. Many crash-and-burn groups came and went, and it was then that I started to collect cheap guitars, mainly because it was all I could afford at the time, and there were a lot of guitars to find.
In that era, I was using an old Harmony H420 amp (made by Valco), a Univox Super Fuzz, and whatever guitar I was digging at the time. I was so proud to pull out oddball guitars during shows and just have this totally trashy sound. Squealing and squeaking and noisy as heck, my style was reminiscent of Davie Allan, Ron Asheton, and Chuck Berry. Of course, I was way worse than all of them, but I did have a frenetic energy and I covered up my lack of skill with feedback. During the ’90s, there was a great punk revival, and I loved bands like the Mummies, Teengenerate, the Makers, the New Bomb Turks, and a bunch of others. Bands were embracing lo-fi, and I was planted firmly in that vein. Plus, the guitars I liked to use already sounded lo-fi.
“This was about the trashiest-sounding guitar, but in a good way!”
For a short spell I was using this Greco guitar and, man, this was about the trashiest-sounding guitar, but in a good way! See, Fujigen pickups (like the ones here) have this echoey voice that I describe as an “empty beer can” sound. My Super Fuzz would just destroy these pickups, and I wish I had some recordings from that era, because it was a real scene! I believe this Greco was a flea-market find but it was much later that I found out it was called a Greco Model 912. This was actually a copy of a German-made Framus guitar, but with a lot more glitz and a crazier headstock. Four pickup selector switches, volume/tone knobs, and a rhythm/lead switch rounded out the electronics. Again, these pickups are instant spaghetti-Western movie tone. Airy and bright, the bridge area is like instant, gnarly surf music. Tom Morello of Rage Against the Machine has a similar guitar and John Barrett of Bass Drum of Death was also fond of these pickups. Interestingly enough, these particular Grecos were made in small numbers, ranging between 500 to 600 in total (including all pickup combinations).
The Greco brand was initially owned by the U.S.-based Goya Corporation, but in the late 1960s, Fujigen bought the brand name (for $1,000) and produced a few truly gonzo guitars, including this Model 912. Originally called the GE-4, the four-pickup version sold for $99.50 in 1967. My particular 912 was sold at Sid Kleiner Guitar Studios in Califon, New Jersey (which I learned thanks to the attached store sticker on the headstock).
Aside from the chrome coolness and the four pickups, this model featured a cute little flip-up bridge mute that was all the rage at the time. The body also had some tasteful German carvings around the edges, and as I write this, I am missing this guitar tremendously! But not even close to the way I’m going to miss my girl in a few months. At least I know that she can shop at the same record stores!