Monster Factory offers manufacturing and testing facilities for Monster Pineland Tube Amplifiers and Visual Clone Guitars. The job description also includes maintenance, repair and modification of tube amplifiers and guitars / basses, as well as accessory sales and Outlet Corner.

Design and manufacturing

Monster Pineland Tube Amplifier production follows in many ways with the ones used by the more famous vintage HiFi-tube amps. Carefully hand wounded Monster Transformers, extensive knowledge of construction techniques and large reservoir of tone secrets provide a strong foundation for extremely wide dynamic range and superior audio response. Monster Pineland amplifier production philosophy includes evident over-engineering and innovative design with highest respect for the classic concepts. Each Monster Pineland amplifier model’s circuit and component layout is designed with the most delicate touch and individual importance.

Design and manufacturing is CE and RoHS compliant. Every Monster Pineland Tube Amplifier is played and carefully burned-in during the 24h testing and quality control period before the amp leaves the Monster Factory. Monster Pineland amps and cabinets may come with custom made Monster flight case.

Warranty and product support

The Monster Pineland product has a 10-year warranty from the date of purchase to the first buyer. Limited warranty on tubes and speakers (3 months). We serve by phone or email for all repair and maintenance issues.


The Monster Tube Amplifiers was first found in Finland during 1969 by Taito Mäntymaa with an idea to design and hand build durable tube amps with superior tone qualities for the professional musicians in Finland. To establish these objectives involved a wide range of ear-to-ear practical studies together with the best musicians in the country.

The Monster amps became the preferred choice for most of the best-known Finnish professional musicians and artists in early 70’s.

Year 2003 we introduced the second generation of Monster amplifiers into the market – Monster Mexican Tube Amplifier product family where all are built by hand and base on 1969 started design development.

Now we have time to introduce totally new 2016 Monster Pineland Tube Amplifier product family, Visual Clone Guitar / The Black & White Series and Tribute Series product family’s.

Monster Team

Taito Mäntymaa, (Radio / TV-mechanic), long histories in music, sound and electronic design. The founder of Monster Tube Amplifier family. Currently acting as technical support and consultant.

Juha Mäntymaa, (Electric-engineer, AMK), has been playing guitar for 45 years, passionate for music, guitars and tube amplifiers. The designer and maker of the second-generation Monster Mexican & Pineland Amplifier family’s, Visual Clone Guitars and Tribute Series. Domestic and export sales manager.


Juha ja Taito Mäntymaa