About Us

• We develop and sell audio kits for home assembly

Our products

• Our speciality is switched mode amplifiers with audiophile sound quality!
• Our kits have excellent quality and price/performance ratio.
• The amplifiers have high energy efficiency; heat sink / cooling requirements are minimal.

New customer

•  Create an Account It's very simple. An account is needed to
  • Change currency and tax settings
  • Contact Us
  • Shop
  • Have access to all documentation
• If you are new to DIY audio and want a simple to build kit:
  • Take a look at our BASIC kits
• We ship world wide and shipping costs are decent.
• Use PayPal or bank to pay for orders placed in The Shop

Search for info

• Find products (At the top of this page under the logo)
• Find in the FAQ (At the top of this page under the logo
• Sitemap (coming)
• Do a Google search for our site (coming). It covers all our sites but is updated at the grace of Google.

On the web

• The Main Site with The Shop and sales support at www.41hz.com
• The Tec Doc wiki with Technical Documentation.
• The 41Hz Audio Forum for customers discussions. Lots of experienced builders hang out and post on a daily basis. Ask them!
  • View customer projects in the Forum Photo Gallery
• The Tec Doc and Forum have their own search system.

We are

• ... located in Stockholm, Sweden.
• ... basically a one man company with help. We depend and rely on help from friends in the DIY audio community world wide.