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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.
- New
MASS-Kobo Model 433
Hand-made Full Balanced Headphone Amplifier
- Model 433: A delivering high-quality sound from input to output.
- Combines the best features of models MASS-Kobo 406 and MASS-Kobo 394.
- Versatile inputs, including XLR Balance Input and RCA Unbalance Input, with internal signal conversion.
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
MASS-Kobo Model 433
Model 433 is a full balanced amplifier that ensures high-quality sound from input to output.
By combining the sound characteristics inherited from the esteemed models 406 and 394 with the output circuit of the model 402 used by the Japanese broadcasting station NHK, it delivers a pleasant and satisfying audio experience.
It offers a range of inputs, including XLR Balance Input or RCA Unbalance Input, with the capability to internally convert unbalanced signals to balanced signals.
The power supply supports worldwide use with AC 100V-240V and 50/60Hz compatibility.
With ample power, model 433 is capable of driving standard dynamic headphones effectively.
Technical specifications
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
- 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.
Model 433 is a full balanced amplifier that ensures high-quality sound from input to output.
By combining the sound characteristics inherited from the esteemed models 406 and 394 with the output circuit of the model 402 used by the Japanese broadcasting station NHK, it delivers a pleasant and satisfying audio experience.
It offers a range of inputs, including XLR Balance Input or RCA Unbalance Input, with the capability to internally convert unbalanced signals to balanced signals.
The power supply supports worldwide use with AC 100V-240V and 50/60Hz compatibility.
With ample power, model 433 is capable of driving standard dynamic headphones effectively.
- 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
- 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.
Customer reviews
Customer Reviews
This is one of my more satisfiying blind purchasing ever. If you are looking for the absolute pinnacle of Japanese engineering in a compact size headphone amplifier, the Mass-Kobo 433 is it. This amp provides a level of transparency and black background that is rare even in high-end desktop setups. It offers a completely uncolored, neutral signature that reveals every micro-detail in your recordings without ever sounding clinical or harsh. Despite its compact size, it drives demanding full-sized headphones with incredible grip and dynamic headroom. It feels like a precision instrument. Whether using IEMs or power-hungry planars, the noise floor is non-existent. This is a "buy it once, keep it forever" piece of gear, unless this masterpiece awakes your cravings for taste the next level (485)
