The Beetronics Swarm Jasmin Custom Series is an analog fuzz harmonizer pedal. Beetronics describes it as sounding "like a thousand killer bees coming to get you," and it works by turning your input signal into a square wave, then multiplying and dividing the frequency of that wave. That process gives you nine possible harmonies in two different octaves, with modulation applied to the harmonies so they move rather than holding a fixed interval1. It belongs to the same family as the Beetronics Swarm and other Beetronics fuzz designs like the OctaHive and Royal Jelly.
Beetronics lists the Jasmin Custom Series as sold out on its product page as of 25 October 20261.
How the Swarm makes its harmonies
The circuit is analog. It takes your guitar or bass signal, converts it to a square wave, and then multiplies and divides that wave's frequency to generate harmony notes. Because the harmonies come from frequency multiplication and division, they cover two octaves, and Beetronics applies modulation to them so they shift as you play1. The WORKER control sets the level of your input signal, now fuzzy and buzzy1. For more on where this design sits, see the fuzz pedal and octave and pitch pedal type pages.
Power, size and specifications
| Specification | Value |
|---|---|
| Power | 9VDC supply, center negative1 |
| Current draw | 7mA1 |
| Bypass | True Bypass1 |
| Pedal size | 5.5" x 4" x 2.75" including knobs and switches1 |
| Enclosure size | 5.5" x 3.25" x 2"1 |
| Pedal weight | 1 lbs / 0.5 kilos1 |
| Package size | 6.75" x 5.25" x 3.25"1 |
| Package weight | 1 lbs 8 oz / 0.75 kilos1 |
The pedal requires a 9VDC center-negative power supply and draws 7mA1. Beetronics lists a regular price of £230.00 GBP1.
Buying and returns
Beetronics offers a 30-Day Hive Happiness Guarantee, shipping not included. You can return the pedal within 30 business days of receiving your order by requesting an RMA form, and you get a full refund if it comes back in new condition in its original packaging. A possible 15% restocking fee or store credit applies for wear or missing accessories, return shipping is at the customer's cost, the item must be back within 7 days of the RMA, and the refund is processed within 5 business days1.
Questions
How does the Beetronics Swarm make its harmonies?
The Swarm is an analog fuzz harmonizer. It converts your input signal into a square wave, then multiplies and divides the frequency of that wave to produce nine possible harmonies in two different octaves. Modulation is applied to the harmonies, so they move rather than sitting at a fixed interval.
Is the Beetronics Swarm true bypass?
Yes. Beetronics lists the Swarm as true bypass, so when the pedal is off, your guitar signal passes through without the fuzz harmonizer circuit in the path.
How much current does the Beetronics Swarm draw?
Beetronics specifies a current draw of 7mA. The pedal requires a 9VDC center-negative power supply, and its low current draw means it sits easily alongside other pedals on a standard supply.
What is the Jasmin Custom Series?
The Jasmin Custom Series is a custom-series version of the Beetronics Swarm, the company's analog fuzz harmonizer. Beetronics builds its pedals by hand in California, and the Jasmin edition carries the same Swarm circuit in a custom-series finish.
Is the Beetronics Swarm Jasmin Custom Series sold out?
Yes. Beetronics lists the Swarm Jasmin Custom Series as sold out on its product page as of late October 2026.
Sources (1)
- Swarm - Jasmin Custom Series - Beetronics, Beetronics
