Interested in plugging a flattop into your favorite silver- or black-panel beauty? Here’s what you need to know.
Have you ever tried to plug your acoustic guitar into a classic-style Fender amp? There are some hurdles to overcome, and this month I’ll provide some advice on how to get past them. But first, some background.
Amps made for electric guitars are carefully designed and matched to the voltages and frequency profiles of signals delivered by electromagnetic pickups. An amp sounds best when it does a good job at amplifying or filtering out certain frequencies. So many of us have stumbled upon challenges when the input signal—say from an acoustic guitar or other instrument—is way different than what the amp expects.
A guitar signal is initially created by moving the strings. The more vibrating metal mass closer to the pickup’s magnet, the more magnetic pull and more current is induced inside the coil wire in the pickups. More windings and stronger magnets induce more current, but also reduce brightness and clarity. The coil-wire thickness, wire material, and coating material and thickness also play a role in signal strength and frequency response. The signal voltage produced by a pickup is low—typically between 0.1 and 1V—and contains frequencies between 80 and 1200 Hz.
On the amp side, there are even more factors that amplify or weaken certain frequencies—so-called frequency filtering. Take a vintage Fender Deluxe Reverb. It is designed with specific tubes, resistors, and caps in the preamp stage to amplify a weak input signal and shape it through EQ, mix in some reverb, and transport the result to the power amp circuit, which does three things. First, it splits and duplicates that result into an inverted signal, then it amplifies the two signals as much as possible, and then feeds them into each side of a power transformer that alters the resulting voltage to a suitable level for a loudspeaker. That’s typically 30 to 50V. The speaker cabinet and loudspeaker itself are the final stage in delivering a filtered and amplified guitar tone.
For acoustic guitars I prefer modern American-style speakers that can handle high power and both a firm bass response and a crisp top end.
If you hook up other instruments, like an acoustic guitar or a harmonica with a microphone, and feed an electric guitar amp their signals, you will get totally different results throughout the circuit. You may not get the tone you expect, or, in the worst case, you might damage the amp. But generally, all passive sources with electromagnetic coil pickups are safe to use. This includes piezo pickups mounted to the bridge of an acoustic guitar and vocal microphones. Since they are not powered by an external source like a 9V battery, they are passive and create a weak signal.
You should be careful using electrically powered sources like an acoustic guitar with a battery-powered preamp and EQ. Also, electric pianos, synthesizers, or Bluetooth speakers with mini-jack outputs are dangerous, too, since they can easily blow the loudspeakers due to a wrong volume or EQ setting. Electric pianos can sound very good through a vintage Fender amp. I’ve seen Fender Rhodes keyboards played through Twin Reverbs, and we’ve all heard organs through Leslie/Vibratone speakers, which can be run by Fender guitar amps.
Acoustic guitars with active pickups can be difficult. With typical default amp settings for electric guitar, the tone is narrow and focused around certain mid frequencies. It lacks fullness, top-end clarity, and overall balance. So, I have some tricks you should try if you’re experimenting with this option. First, set all the EQ knobs to 10. This allows the guitar signal to travel through the preamp section with minimum change of tone. Be very careful with volume and start low—at around 1.5—and increase from there. I find big, powerful Fender amps are best for this, since they have plenty of clean headroom and wide EQ possibilities with a full set of bass, mid, treble, and bright-switch controls. And that makes them less prone to howling feedback.
A big speaker cabinet will enhance the low end, allowing the preamp and power amp to relax more without maxing out clean headroom. Remember that the power and energy lie in the bass. I suggest the silver-panel 40-watt Bandmaster Reverb and 85-watt Showman Reverb as practical amp heads for acoustic purposes. I use my Bandmaster Reverb with a 1x12 extension cabinet loaded with an Eminence Maverick. For acoustic guitars, I prefer modern American-style speakers that can handle high power and both a firm bass response and a crisp top end. Speakers are very important for your tone. The guitar’s pickups are also important, together with a correct setup, so the action permits the optimum proximity of the pickups.
Acoustic pickups don’t have to be expensive. They just need to be balanced and clear. A good guitar amp and some careful adjustments of the controls will do the rest.
- Acoustic Amplification: The Newbie's Guide - Premier Guitar ›
- Tone Tips: Thicken It Up! - Premier Guitar ›
- The Recording Guitarist: Stick That Mic Where the Sun Don't Shine ... ›
- Vintage-style Fender Twin Reverb Amps - Premier Guitar ›
Looking for more great gear for the guitar player in your life (yourself included!)? Check out this year's Holiday Gear Finds!
D'Addario XPND Pedalboard
DR-05X Stereo Handheld Recorder
Wampler Pedals Ratsbane
Flare is a dual-function pedal with a tube-like booster and a 1970s-style ring modulator effect that can be played separately or together.
Flare’s ring modulator is based on the iconic tone of the original Dan Armstrong Green Ringer. This vintage classic was made famous by Frank Zappa who loved the unusual modulations created by generating a harmonic octave over notes. Messiah’s version offers two control knobs: a “Sparkle” tone attenuator and output Level control. Its taupe-gold body, purple and green knobs and stick-figure rock ’n’ roller holding up a flame convey an appropriately rockin’70s vibe.
In a unique twist, Messiah’s Flare pairs the ringer with a warm tube-style boost instead of a fuzz. Flare feeds the booster into the ringer for an extra punch, while preserving the Green Ringerspirit. The ringer side also turns any fuzz into an octafuzz, and it has the ability to quiet signal background noise fed through it.
The booster side features a single Boost knob to control the MOSFET circuit, making it very tube-amp-friendly with a warm, organic boost and gain of up to 32dB.
The pedal is a distinct improvement over the 1970s pedal that inspired it. “Most ringer pedals don’t track well,” Tom Hejda, owner of Messiah Guitars. “The player can’t rely on repeating the same effect even with the most consistently played notes. We carefully matched the components, so our ringer follows your every move, producing that slightly dirty octave you expect on demand.”
Messiah developed this vintage octave pedal with flexible features so that people who love that messy, dirty Zappa-esque sound can get there with ease but there’s also something for those who have not fallen in love with fuzz or the Green Ringer alone. Flare offers an array of sonic options while retaining simplicity in the controls.
Each Flair Pedal Includes:
- 3 control knobs: Boost, Sparkle, and Level
- Two effects – Ring Modulator and Boost – can be used together or separately
- Space-saving top side jacks
- Durable, cast aluminum alloy 125B enclosure with fun artwork
- Easy to see, illuminated True-bypass foot switch
- Standard 9V pedal power input
Flare Pedal Demo
Messiah Guitars pedals are designed with an explorative player in mind. Like their custom guitars and amplifiers, Messiah’s pedals are hand-crafted in Los Angeles for a long life with guaranteed quality.
Flare retails for $199.00 and can be purchased directly at Messiah Guitars or you can hear it in person at Impulse Music Co. in Canyon Country, CA.
For more information, please visit messiahguitars.com.
This feathery little guy is a joy to play because of its incredibly quick response to your right hand - much faster and more expressive than your typical auto-wah pedal.
If it looks like a duck, acts like a duck, and QUACKS like a duck, then it must be a duck. That's how we came up with the name for our new envelope filter. This feathery little guy is a joy to play because of its incredibly quick response to your right hand - much faster and more expressive than your typical auto-wah pedal. Trevor explains how this is possible in the launch video, as well as gives a demo on Le Canard’s operation.
The attack control determines how quickly the filter responds to the envelope, and the decay sets how quickly the filter releases afterward. The range controls which frequency spectrum the filter does its magic on. Add to this relay-based full-bypass switching with failsafe, and you've got one crazy little quacky beast. It is so expressive that you'll want to give up on your rocker-wah forever.
The MayFly Le Canard envelope filter features:
- Super fast responding envelope follower. Touch it and it jumps!
- Range control to dial in the character of the filter
- Attack control to control how fast the filter moves on that first touch
- Release control to control how slowly the filter slides back to baseline
- Full bypass using relays with Fail SafeTM (automatically switches to bypass if the pedal loses power)
- Cast aluminum enclosure with groovy artwork
- MSRP $149 USD ($199 CAD)
Introducing the MayFly Le Canard Envelope Filter
All MayFly pedals are hand-made in Canada.
For more information, please visit mayflyaudio.com.
Outlaw Effects introduces their next generation of NOMAD rechargeable battery-powered pedal boards.
Available in two sizes, NOMAD ISO is a compact, versatile tool that offers the convenience of a fully powered board plus the additional freedom of not having to plug into an outlet. NOMAD ISO is ideal for stages with limited outlet availability, quick changeovers, busking outdoors, temporary rehearsal locations, and more.
NOMAD ISO builds upon the legacy of the ultra-convenient and reliable NOMAD rechargeable pedalboard line originally launched in 2018. The brand new NOMAD ISO editions feature eight isolated outputs (1 x 9V DC, and 1 switchable 9V/12V DC) for even more versatility and clean, quiet power. With an integrated lithium-ion battery pack boasting 12800mAh capacity, NOMAD ISO can fuel a wide array of pedals, and will last over 10 hours* on a single charge.
Each NOMAD ISO pedal board includes adhesive hook & loop pedal-mounting tape, eight (8) standard DC connector cables, and one (1) reverse polarity DC cable, giving you everything you need to build your ultimate "off-the-grid" rig. A rugged, road-ready padded gig bag with shoulder strap is also included, to safely protect your gear while you're on the move.
NOMAD ISO S
NOMAD ISO S: MSRP $309 / MAP: $249
Dimensions: 19 ¼" x 5 ¼"
NOMAD ISO M
NOMAD ISO M: MSRP $349 / MAP $279
Dimensions: 19 ¼" x 11"
More info: https://www.outlawguitareffects.com.