Designed by legendary bass player and founding member of Jefferson Airplane, this instrument features a Casady-designed JCB-1 Low-Impedance Humbucker and a three-position rotary impedance control for versatile tones.
As a founding member of Jefferson Airplane and Hot Tuna, legendary bass player and Rock and Roll Hall of Fame Inductee Jack Casady’s full driving tone and innovative melodic bass work have defined the role of bass guitar in rock and roll for decades. Liberating the bass from its traditional role as part of the rhythm section, Jack’s pioneering approach to bass brought the instrument to the forefront. The new Epiphone Jack Casady Fretless Bass was and is the culmination of years of experimentation by Casady to find an instrument with superior electric tone and the response of an acoustic bass. It features the Casady-designed JCB-1 Low-Impedance Humbucker, and a three-position rotary impedance control for a wide range of tonal versatility.
Jefferson Airplane’s debut, Jefferson Airplane Takes Off, was recorded in February of ’66 and released in August of that year. “It had somewhat of a local success,” explains Jack. “It was the material that we had been playing as a group around the Bay area for a while. We recorded it on 3-track, all pretty much live performances.” When the original singer, Signe Anderson, left the band to have a baby, it was Jack who convinced Grace Slick, then performing with her own band the Great Society, to join the group. The roster complete, Jefferson Airplane rocketed to superstardom in 1967 on the initial strength of their hits “Somebody to Love” and “White Rabbit,” making them a cornerstone of San Francisco’s burgeoning rock scene. Jack’s ground-breaking bass work was a highlight of Surrealistic Pillow, the Airplane’s 1967 breakthrough album. “That album was really a unique statement,” says Casady in retrospect. “There were a lot of different styles of songs contributed by everybody, including an instrumental acoustic fingerpicking original tune by Jorma called ‘Embryonic Journey.’ It was quite an eclectic album and I think it still holds up today.” Jefferson Airplane subsequently released a string of acclaimed recordings–After Bathing At Baxter’s (late ’67), Crown of Creation (’68), the live Bless Its Pointed Little Head (’69), Volunteers (’70), Bark (’71), Long John Silver (’72), and the live Thirty Seconds Over Winterland (1973). The band was inducted into the Rock and Roll Hall of Fame in 1995.
With the release of his solo album, Dream Factor, Casady opened a new chapter in his ever-evolving career. Featuring 11 songs and an impressive cast of collaborators including Paul Barrere, Ivan Neville, Jorma Kaukonen, Warren Haynes, Box Set, Fee Waybill, and Doyle Bramhall II among others, Casady showcases his signature sound in a variety of settings, traveling through blues, rock, country, folk, funk, R&B and soul influences.
One of the most innovative rock and roll bands in American music, Hot Tuna recorded their latest album, Steady As She Goes, at Levon Helm’s studio with GRAMMY®--winning producer Larry Campbell and captures the energy of Hot Tuna’s live performances. Jack, along with longtime band mate Jorma Kaukonen, teamed up with Barry Mitterhoff on mandolin, Skoota Warner on drums, as well as Larry Campbell on guitar, fiddle, organ, and vocals to deliver an absolute masterpiece.
With sweeping chords and stormy melodic lines Jack’s bass distinguished not only Jefferson Airplane and Hot Tuna but also a variety of solo and side projects and recordings with artists including Jimi Hendrix, David Crosby, Warren Zevon, Country Joe and The Fish, SVT, Rusted Root, and Gov’t Mule.
For more information, please visit epiphone.com.
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This month’s mod Dan’s uses a 500k linear pot, a 1.5H inductor (L) with a 0.039 µF (39nF) cap (C), and a 220k resistor (R) in parallel.
Don’t let the name fool you, this is a purely passive device—nothing is going to be boosted. In general, you can’t increase anything with passive electronics that isn’t already there. Period. But you can reshape the tone by deemphasizing certain frequencies and making others more prominent (so … “boost” in guitar marketing language). Removing highs makes lows more apparent, and vice versa. In addition, the use of inductors (which create the magnetic field in a guitar circuit) and capacitors will create resonant peaks and valleys (bandpasses and notches), further coloring the overall tone. This type of bandpass filter only allows certain frequencies to pass through, while others are blocked, and it all works at unity gain.
“You can’t increase anything with passive electronics that isn’t already there … but you can reshape the tone by deemphasizing certain frequencies and making others more prominent.”
All the systems I mentioned above are doing more or less the same thing, using different approaches and slightly different component values. They are all meant to be updated tone controls. Our common tone circuit is usually a variable low-pass filter (aka treble-cut filter), which only allows the low frequencies to pass through, while the high frequencies get sent to ground via the tone cap. Most of these systems are LCR networks, which means that there is not only a capacitor (C), like on our standard tone controls, but also an inductor (L) and a resistor (R).
In general, all these systems are meant to control the midrange in order to scoop the mids, creating a mid-cut. This can be a cool sounding option, e.g. on a Strat for that mid-scooped neck and middle tone.
Dan Torres offered his “midrange kit” via an internet shop that is no longer online, same with his business website. The Torres design is a typical LCR network and looks like the illustration at the top of this column.
Dan’s design uses a 500k linear pot, a 1.5H inductor (L) with a 0.039 µF (39nF) cap (C), and a 220k resistor (R) in parallel. Let’s break down the parts piece by piece:
Any 500k linear pot will do the trick, in one of the rare scenarios where a linear pot works better in a passive guitar system than an audio pot.
(C) 0.039µF cap: This is kind of an odd value. Keeping production tolerances of up to 20 percent in mind, any value that is close will do, so you can use any small cap you want for this. I would prefer a small metallized film cap, and any voltage rating will do. If you want to stay as close as possible to the original design, use any 0.039 µF low-tolerance film cap.
(L) 1.5H inductor: The original design uses a Xicon 42TL021 inductor, which is easy to find and fairly priced. This one is also used in the Bill Lawrence Q-Filter design, the Gibson standard Varitone, and many other systems like this. It’s very small, so it will fit in virtually every electronic compartment of a guitar. It has a frequency range of 300 Hz up to 3.4 kHz, with a primary impedance of 4k ohms (that’s the one we want to use) and a secondary impedance of 600 ohms. Snip off the three secondary leads and the center tap of the primary side and use the two remaining outer primary leads; the primary side is marked with a “P.” On the pic, you can see the two leads you need marked in red, all other leads can be snipped off. You can connect the two remaining leads to the pot either way; it doesn’t matter which of them is going to ground when using it this way.
Drawing courtesy of singlecoil.com
(R) 220k: use a small axial metal film resistor (0.25 W), which is easy to find and is the quasi-standard.
Other designs use slightly different part values—the Bill Lawrence Q-filter has a 1.8H L, 0.02 µF C and 8k R, while the old RA Gresco Tone Qube from the ’80s has a 1.5H L, 0.0033 µF C, and a 180k R, so this is a wide field for experimentation to tweak it for your personal tone.
This mid-cut system can be put into any electric guitar not only as a master tone, but also together with a regular tone control or something like the Fender Greasebucket, or it can be assigned only to a certain pickup. It can be a great way to enhance your sonic palette, so give it a try.
That’s it! Next month, we’ll take a deeper look into how to fight feedback on a Telecaster. It’s a common issue, so stay tuned!
Until then ... keep on modding!