Spiral Electric FX White Spiral Boost
The White Spiral Boost is a dirty boost and the result of my exploration of various JFET circuits initially inspired by Jimmy Page’s use of the Barcus Berry Preamp. While Page is only known to have used it on acoustic, I found that the BB 1330-1, and the simpler BB 1330S, work great with electric guitars that have low-output pickups and as a general boost circuit. The White Spiral circuit has evolved over time to become a hybrid circuit with bits of the BB 1330S, National Semiconductor Mu-Amp, and the Yellow Spiral. The White Spiral uses a dual JFET for amplification, the Grit is a combination of JFET and Silicon clipping, the Girth control comes from the Yellow Spiral but with a twist, the White also has 18v internal operation to provide increased headroom.
The location of the Girth Control in the circuit is user-definable by the Alpha/Omega two-way toggle. In the Alpha (A - Left) position the Girth control is placed before the Grit clipping section of the White Spiral. This position allows more, or less, bass to be sent to the Grit, and changes the character and compression of the Grit. The Omega (Ω - Right) position places the Girth Control after the Grit Control and this position changes how much bass content is passed through the circuit. This position is still dirty but it is more open, glassy, and Hi-Fi sounding than the Alpha setting. Bassists will LOVE the Omega selection!
The Grit Control does double duty, it both changes the performance of the JFET’s to create distortion, and also brings in Silicon clipping. These two types of clipping together are slightly asymmetrical and the result is a natural-sounding low-gain grit/grind that mates well with already dirty amp channels.
Warranty & Returns
All New products are covered by the manufacturers new warranty. Please check their website for the length of warranty and warranty conditions. If an item you receive is faulty get in touch with us ASAP. Second Hand products come with a 4 week warranty from us. If there is an issue let us know ASAP! This covers normal use and does not cover accidental damage, misuse, wrong power plugged into it, modding, water damage or any other damage caused by mistreatment. Just treat it nice and all will be good!
Shipping
We send A LOT of packages every week so don't worry about the shipping side of things!
We've never lost a thing and your awesome new gear will be packed up really well to avoid any damage in transit.
If your order comes in before 2pm we will ship it same day. Most of the time we pack things up all the way to 4pm so just call if you need it to leave same day after 2pm.
We ship mainly with Australia Post but may use a courier depending on location and size of the package.
Free Post ships with Australia Post standard and expected shipping times are between 4-6 business days depending on location. It will be longer to outside of metro and rural areas.
Express Post will usually be with you next business day in metro areas of QLD, NSW, SA, VIC and TAS. WA will take 2 days to metro and extra days after that to out side metro and rural areas.
Everything we ship has a tracking number with the exception of some power cables and smaller envelope packages. You will be emailed tracking once your order has been shipped!
Videos
The White Spiral Boost is a dirty boost and the result of my exploration of various JFET circuits initially inspired by Jimmy Page’s use of the Barcus Berry Preamp. While Page is only known to have used it on acoustic, I found that the BB 1330-1, and the simpler BB 1330S, work great with electric guitars that have low-output pickups and as a general boost circuit. The White Spiral circuit has evolved over time to become a hybrid circuit with bits of the BB 1330S, National Semiconductor Mu-Amp, and the Yellow Spiral. The White Spiral uses a dual JFET for amplification, the Grit is a combination of JFET and Silicon clipping, the Girth control comes from the Yellow Spiral but with a twist, the White also has 18v internal operation to provide increased headroom.
The location of the Girth Control in the circuit is user-definable by the Alpha/Omega two-way toggle. In the Alpha (A - Left) position the Girth control is placed before the Grit clipping section of the White Spiral. This position allows more, or less, bass to be sent to the Grit, and changes the character and compression of the Grit. The Omega (Ω - Right) position places the Girth Control after the Grit Control and this position changes how much bass content is passed through the circuit. This position is still dirty but it is more open, glassy, and Hi-Fi sounding than the Alpha setting. Bassists will LOVE the Omega selection!
The Grit Control does double duty, it both changes the performance of the JFET’s to create distortion, and also brings in Silicon clipping. These two types of clipping together are slightly asymmetrical and the result is a natural-sounding low-gain grit/grind that mates well with already dirty amp channels.
Warranty & Returns
All New products are covered by the manufacturers new warranty. Please check their website for the length of warranty and warranty conditions. If an item you receive is faulty get in touch with us ASAP. Second Hand products come with a 4 week warranty from us. If there is an issue let us know ASAP! This covers normal use and does not cover accidental damage, misuse, wrong power plugged into it, modding, water damage or any other damage caused by mistreatment. Just treat it nice and all will be good!
Shipping
We send A LOT of packages every week so don't worry about the shipping side of things!
We've never lost a thing and your awesome new gear will be packed up really well to avoid any damage in transit.
If your order comes in before 2pm we will ship it same day. Most of the time we pack things up all the way to 4pm so just call if you need it to leave same day after 2pm.
We ship mainly with Australia Post but may use a courier depending on location and size of the package.
Free Post ships with Australia Post standard and expected shipping times are between 4-6 business days depending on location. It will be longer to outside of metro and rural areas.
Express Post will usually be with you next business day in metro areas of QLD, NSW, SA, VIC and TAS. WA will take 2 days to metro and extra days after that to out side metro and rural areas.
Everything we ship has a tracking number with the exception of some power cables and smaller envelope packages. You will be emailed tracking once your order has been shipped!
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