In stock and ready to ship
In Stock and Ready to Ship
Ships in 1 to 3 business days. Monday to Friday, except bank holidays. Subject to stock availability and security checks.
- 3.5mm
- 4.4mm
FATFreq x HBB Deuce (Launch Package)
Bass-Canon In-Ear Monitor
- Collaboration between FATFreq and Hawaii Bad Boy
- Custom-Designed Dynamic Chamber
- 25dB sub-bass shelf with the Custom-Designed Bass Boost Adapter
- Bass Cannon™, Sonar La Trompa™ and PhaseAlign technology
- Latest revision with reinforced shell
- Launch edition comes with the Silver 'Blood' cable + Bass impedance adapter
VAT and Duties Included for UK and Eligible EU Customers.
If you are outside the UK or EU, the price does not include any taxes. Local taxes and import duties will be extra. They will be raised by the local authorities and billed directly to the customer.
VAT and Import Taxes FAQ
FATFreq x HBB Deuce (Launch Package)
Experience deep, focused power with the 2nd generation of FATfreq's Basscannon technology: 25dB sub-bass shelf, expertly controlled under 150Hz. FATfreq's proprietary tubeless system provides a phase-accurate three-dimensional audio experience, placing instruments and vocals precisely within a spacious environment. The Deuce excels in dynamics, capturing both subtle and powerful moments with ease. Giving you the best of both worlds at unmatched value.

Dynamic Chamber
FATfreq's new acoustic system features advanced acoustic networks that manage sound wave propagation for optimal clarity and precision. Specialized bass chambers optimize airflow for enhanced tonality and deeper bass.

Bass Boost Adapter
Designed to enhance your listening experience by delivering an additional boost to the sub-bass frequencies. Carefully crafted with high-quality components, including pure silver wiring, this adapter provides a ~10dB increase in bass response under 150Hz. Perfect for those seeking deeper, more powerful bass without compromising clarity or sound quality.
Bass Cannon™
(Patent Pending) Using proprietary dynamic woofers, bass chambers and acoustic damping networks, FATfreq was able to design the deepest bass ever recorded of over 30dB, expertly controlled below 150Hz with zero mid-range bleed. A FATfreq innovation pioneered and perfected for sheer bass power.
Sonar La Trompa™
Inspired by the anatomy of the traditional french horn, FATfreq uses exponential horn curvature for gain control and to improve treble tonality via acoustics. Providing you with Smooth, natural sounding highs, grounded by a nice timbre in the mid and low frequencies.
PhaseAlign
The absence of a DSP in IEMs means that we have to match the phase of multi-way systems via Acoustic delay. Using proprietary structures, we were able to align the low, mid and high frequencies such that they reach your eardrum in a coherent manner. Giving you the sound accuracy and resolution demanded on stage and studio.
Technical specifications
Over a year, the Deuce was meticulously tuned with top reviewer HBB, also known as Bad Guy Good Audio Reviews, undergoing multiple iterations of tuning and design. Each phase focused on refining sound clarity, depth, and dynamics. HBB's extensive collection of hip-hop, rock, and classical tracks heavily influenced the Deuce's tuning direction, with significant effort spent to ensure it excels in these genres.
Our meticulous process also integrated invaluable feedback from professional musicians, including bassists, drummers, and synth keyboardists, who tested the Deuce in both production and live settings. This dedication has resulted in an IEM that offers unparalleled audio quality and an immersive experience.
- FATfreq x HBB Deuce IEM
- Pre-order special: Silver 'Blood' cable + Bass impedance adapter
Shipping and Returns
- Dispatch
- 1–3 business days In-stock items, Monday to Friday except bank holidays, subject to stock and security checks.
- Delivery
- Tracked or signed Delivery options and costs are shown at checkout. We don't profit from shipping charges.
- Returns
- 14 days For electronics such as DACs, amps and players, in like-new condition with all original packaging and accessories.
Good to know
- In-ear monitors can only be refunded if returned sealed and unused, for hygiene reasons. If you're not happy with yours, get in touch and we'll look at credit or a buy-back.
- Return shipping is paid by the customer.
- Open box, B-stock, refurbished and clearance items can't be returned.
- Please add a valid phone number at checkout in case we need to verify your identity.
Warranty
- New products
- 1-year manufacturer warranty Most products. The exact warranty is set by the manufacturer.
- Pre-owned & open box
- 3 months B-grade, open box, refurbished, ex-demo and second-hand items.
- Covered
- Defects in materials, parts and workmanship
- Not covered
- Accidents, misuse and unauthorised repairs Including abnormal conditions, deliberate abuse and operator error.
- Making a claim
- Send it to us, we ship it back free You cover shipping to Elise Audio; we pay to send the repaired or replacement product back.
Experience deep, focused power with the 2nd generation of FATfreq's Basscannon technology: 25dB sub-bass shelf, expertly controlled under 150Hz. FATfreq's proprietary tubeless system provides a phase-accurate three-dimensional audio experience, placing instruments and vocals precisely within a spacious environment. The Deuce excels in dynamics, capturing both subtle and powerful moments with ease. Giving you the best of both worlds at unmatched value.

Dynamic Chamber
FATfreq's new acoustic system features advanced acoustic networks that manage sound wave propagation for optimal clarity and precision. Specialized bass chambers optimize airflow for enhanced tonality and deeper bass.

Bass Boost Adapter
Designed to enhance your listening experience by delivering an additional boost to the sub-bass frequencies. Carefully crafted with high-quality components, including pure silver wiring, this adapter provides a ~10dB increase in bass response under 150Hz. Perfect for those seeking deeper, more powerful bass without compromising clarity or sound quality.
Bass Cannon™
(Patent Pending) Using proprietary dynamic woofers, bass chambers and acoustic damping networks, FATfreq was able to design the deepest bass ever recorded of over 30dB, expertly controlled below 150Hz with zero mid-range bleed. A FATfreq innovation pioneered and perfected for sheer bass power.
Sonar La Trompa™
Inspired by the anatomy of the traditional french horn, FATfreq uses exponential horn curvature for gain control and to improve treble tonality via acoustics. Providing you with Smooth, natural sounding highs, grounded by a nice timbre in the mid and low frequencies.
PhaseAlign
The absence of a DSP in IEMs means that we have to match the phase of multi-way systems via Acoustic delay. Using proprietary structures, we were able to align the low, mid and high frequencies such that they reach your eardrum in a coherent manner. Giving you the sound accuracy and resolution demanded on stage and studio.
Over a year, the Deuce was meticulously tuned with top reviewer HBB, also known as Bad Guy Good Audio Reviews, undergoing multiple iterations of tuning and design. Each phase focused on refining sound clarity, depth, and dynamics. HBB's extensive collection of hip-hop, rock, and classical tracks heavily influenced the Deuce's tuning direction, with significant effort spent to ensure it excels in these genres.
Our meticulous process also integrated invaluable feedback from professional musicians, including bassists, drummers, and synth keyboardists, who tested the Deuce in both production and live settings. This dedication has resulted in an IEM that offers unparalleled audio quality and an immersive experience.
- FATfreq x HBB Deuce IEM
- Pre-order special: Silver 'Blood' cable + Bass impedance adapter
- Dispatch
- 1–3 business days In-stock items, Monday to Friday except bank holidays, subject to stock and security checks.
- Delivery
- Tracked or signed Delivery options and costs are shown at checkout. We don't profit from shipping charges.
- Returns
- 14 days For electronics such as DACs, amps and players, in like-new condition with all original packaging and accessories.
Good to know
- In-ear monitors can only be refunded if returned sealed and unused, for hygiene reasons. If you're not happy with yours, get in touch and we'll look at credit or a buy-back.
- Return shipping is paid by the customer.
- Open box, B-stock, refurbished and clearance items can't be returned.
- Please add a valid phone number at checkout in case we need to verify your identity.
- New products
- 1-year manufacturer warranty Most products. The exact warranty is set by the manufacturer.
- Pre-owned & open box
- 3 months B-grade, open box, refurbished, ex-demo and second-hand items.
- Covered
- Defects in materials, parts and workmanship
- Not covered
- Accidents, misuse and unauthorised repairs Including abnormal conditions, deliberate abuse and operator error.
- Making a claim
- Send it to us, we ship it back free You cover shipping to Elise Audio; we pay to send the repaired or replacement product back.