The Effectrode Blue Bottle is a limited-edition tube boost pedal from UK maker Effectrode, a company that specializes in valve-based pedals1. It is a signature pedal custom designed for blues/rock guitarist John Verity of Argent, built to let him pull fatter, more bluesy B.B. King "335" tones out of his Strat-type guitars21. RockBoard's PedalPedia describes it as the perfect vintage mid-boost, never too aggressive or over-the-top, for low-output single-coil pickups2.
The circuit draws its inspiration from the valve-based Pultec equalizers found in high-end recording studios31, and it houses a real inductor alongside an NOS Sylvania 6021 sub-miniature triode valve3.
A tube mid-boost for single-coil pickups
The Blue Bottle is a mid booster, not a clean volume boost or an overdrive. Its job is to add thickness and warmth in the midrange, which is exactly what thin, low-output single-coil pickups often need. MusicRadar's review team found that the mid boost, applied to the clean spank of a single-coil pickup, produced impressive results: warmth on tap, thickness, and natural articulation and clarity in the single-coil response3.
Guitar World's reviewer, Trevor Curwen, summed up the effect in his verdict:
"Offering midrange boost alongside an increase in clarity, the Blue Bottle is one of those pedals that simply improves your tone and would perfectly suit the 'always on' role."1
That "always on" character is worth noting: this is a pedal designed to sit in your chain permanently, shaping your core tone, rather than something you stomp for a solo1.
Controls
| Control | What it does |
|---|---|
| Mid Boost | Flat response at its lowest position; adds up to 12dB of midrange boost centerd around 500Hz at its extremes31 |
| Volume | Delivers up to 18dB of gain; hits unity gain around the 11 o'clock position without the Mid Boost knob in play1 |
| Hi-Cut switch | Rear-panel switch with a -6dB/octave low-pass filter that rolls off top end above 6kHz or 3kHz31 |
| Bypass footswitch | Engages and disengages the pedal31 |
Two controls, Mid Boost and Volume, are all you need according to the original announcement, and the Hi-Cut switch gives you a way to tame harsh top end, useful with bright single coils or a loud amp43.
Built for John Verity, based on Pultec equalizers
The Blue Bottle was custom designed for John Verity, the blues/rock guitarist who played with Argent2. The goal, according to the maker, was to enable him to achieve a fatter, more bluesy B.B. King "335" tone from his Strat-type guitars2. In other words, it is a pedal built to make a Fender-style single-coil guitar sound closer to a big hollowbody with humbuckers, at least in the midrange.
For the circuit, Effectrode looked to valve-based Pultec equalizers, the high-end units you would find in a recording studio31. The pedal was announced in January 2019 as the JV-1A Blue Bottle, an all-tube inductorized mid booster based on a Pultec tube EQ, developed with input from Verity himself4.
The Blue Bottle is a limited edition. Guitar World describes it as such1, and the 2019 announcement stated that production is limited and will cease once Effectrode runs out of viable hardware for the circuit4. The NOS Sylvania 6021 sub-miniature triode at the heart of the design is old stock, so supply is finite by nature.
The pedal is also fitted with audiophile-grade components, including precision low-noise metal-film resistors and polyester coupling capacitors4.
Power and bypass
The Blue Bottle needs the supplied 12V DC adaptor rated at 600mA3. The maker's product page lists the voltage as 12V DC center negative2, while the 2019 announcement of the JV-1A described the supplied supply as center positive4; check the markings on the adaptor that ships with your unit before powering it from anything other than that supply.
At 600mA, this pedal cannot run on a battery and is a poor candidate for a daisy chain. Use the supplied adaptor or an isolated power supply with a 12V output3.
The pedal is true bypass31, and the JV-1A announcement described anti-pop or thump foot-switching circuitry to keep the bypass switch quiet4.
What reviewers said
Both major reviews came away positive. MusicRadar found the mid boost impressive on single-coil pickups, with warmth, thickness, and clarity3. Guitar World's Trevor Curwen went further, calling it a pedal that simply improves your tone and would suit an always-on role1.
Related pages
- Effectrode Blue Bottle Inductorized Booster
- Effectrode JV-1A Blue Bottle
- Effectrode Fire Bottle
- Boost Pedals
Videos
Effectrode
Joe Perkins
Questions
Is the Effectrode Blue Bottle true bypass?
Yes. Both MusicRadar and Guitar World list the Blue Bottle as true bypass in their reviews, and the earlier JV-1A announcement described true-bypass switching with anti-pop or thump foot-switching circuitry to keep the switch quiet in use.
What power supply does the Effectrode Blue Bottle need?
It runs on a supplied 12V DC adaptor rated at 600mA. The maker's product page lists 12V DC center negative, while the earlier JV-1A announcement described the supplied supply as center positive. Either way, the 600mA draw rules out a battery and most daisy chains, so use the supplied adaptor or an isolated 12V supply.
Is the Effectrode Blue Bottle a limited edition?
Yes. Guitar World describes it as a limited-edition booster, and the 2019 announcement of the JV-1A version stated that production is limited and will cease once Effectrode runs out of viable hardware for the circuit.
Where is the Effectrode Blue Bottle made?
In the UK. Effectrode is a UK-based pedal company that specializes in valve-based pedals, and both Guitar World and the 2019 gearnews announcement identify the Blue Bottle as UK made.
Does the Blue Bottle use a real tube?
Yes. MusicRadar's review notes the pedal houses a real inductor in its circuitry alongside an NOS Sylvania 6021 sub-miniature triode valve, so the boost stage is genuinely tube-based rather than a solid-state emulation.
Sources (4)
- Effectrode Blue Bottle Inductorized Booster review, Guitar World, 2020-08-20
- Blue Bottle by Effectrode, RockBoard PedalPedia, 2026
- Effectrode Blue Bottle Inductorized Booster review, MusicRadar, 2020-08-18
- Effectrode JV-1A Blue Bottle Tube Booster, gearnews.com, 2019-01-23
