Instrument qualities can be enhanced in conjunction with tone-shaping to match playing styles. Internal edge wheels allow individual custom voicing for both the bass and treble control spectrums. The Active EQ is simplicity itself, incorporating highly responsive bass and treble controls, taken from the John East high end UNI-PRE system. It’s easy to fit at home using basic tools, no soldering, no physical changes to the instrument. It’s designed as a direct drop-in replacement, including a place for the battery. The J-TONE pre amp was created to replicate the authentic original passive wiring of the J style bass with a high spec Active EQ. In passive mode, the original jazz style bass is fully maintained since the signal path is a replica of those in the original Jazz. It is designed to fit directly into any jazz style bass without the need for invasive modification to the instrument. We include all necessary mounting hardware: high-quality potentiometers on pre-wired harness battery clip and black anodized, knurled, dome-style knobs.The J-Tone is a new on board preamp with a fully passive signal path and a high spec professional active preamp. Two 9v batteries can be wired together in series for added headroom. The STC-2A Tone Control is voiced to work in any bass that is equipped with two active pickups and has space for 3 control knobs (volume/slap switch, blend, concentric bass and treble controls) and a single 9v battery in the control cavity. The two small trim pots on the circuit board can be tweaked to preset the slap contour EQ just the way you want. Pulling up on the volume knob will engage the special EQ contour voiced specifically for slap playing. The Slap Switch is a pushpull located on the volume control. The bass can be reduced to tighten up a boomy instrument, or it can be increased to add warmth and punch. The treble control can produce a wide ranging, extremely usable response that is brilliant, yet smooth without being brittle. The STC-2A, designed for active pickups, feature concentric bass and treble controls, a master volume, a blend control, and our proprietary Slap Switch. Our design enables players to boost or cut specifically focused frequencies in order to achieve signature tones and to dial in a great sound no matter what the situation. Seymour Duncan Tone Circuits will add a tremendous amount of on-board tonal versatility to any dual pickup bass. Output – The overall output of a passive pickup is influenced by several design factors: number of turns of wire on the coil(s), strength of the magnet, coil geometry and magnetic circuit geometry.The output of an active pickup is influenced by the same factors but is predominantly determined by the design of the onboard preamp. Looking at this from another point of view, ceramic magnets can be said to produce increased clarity, better note definition and faster response to picking. It is for this reason that many consider ceramic magnets to have a brittle sound, not their gauss strength. This has the effect of decreasing the inductance of the pickup and significantly raising the resonant frequency. The magnets at the lower end of the scale tend to produce a softer attack and a degree of “bloom” to the envelope of the note.Ĭeramic magnets should be considered as an individual case because they do not contain any nickel or iron. As the gauss strength goes up, so does the output. Control Configuration Volume/Blend Stack Treble/Bass Stack Mid/Mid Stack Blend & Pickups Switch Active/Passive Switch Available in Black, Chrome, or Gold Finish Description. From there in order of ascending strength you have A2, A4, A5, A6, Ceramic and A8. The J Retro 01 Bass Preamp is designed to fit directly into standard 'Jazz' style basses without modification, including a 9v battery. Of the magnets we use, Alnico 3 has the lowest gauss strength. In the case of pickups, the most significant characteristic is the gauss strength, which is a measure of the density of the magnetic field. Magnet – We use several different magnet formulations: Alnico 2, Alnico 3, Alnico 4, Alnico 5, Alnico 6, Alnico 8 and Ceramic 5/8. DCR is often used as a gauge of output because as the turns increase, so does the output, though magnet type and the coil geometry also influence output. Quality BJB Preamp/Tone Control with Gain for JB Bass (With Jazz Bass Control Plate and Control Knobs) with free worldwide shipping on AliExpress Mobile. The length of the coil form, the number of turns and the gauge of wire all affect the DCR reading. DCR – Short for DC Resistance, is measured in Ohms and is the total resistance of the copper wire wound around a coil form.
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