Rovaha Rovaha
Rovaha Rovaha
  • Home
  • Branding
    • Corporate branding
    • Brand integration
  • Customer satisfaction
    • Customer satisfaction models
    • Customer Satisfaction Questionnaire
  • Strategy
    • Strategy model
  • Communication
    • Rose of Leary
    • M&A: The role of Marketing
  • Multi media
    • Presentations
  • Loudspeaker design
    • SEAS Jenzen Next
      • Intro - SEAS Jenzen Next
      • Drawings
      • Image library
    • Vifa Format
      • Intro - how it all started
      • Drawings
      • Image library
  1. You are here:  
  2. Home
  3. Loudspeaker design
  4. SEAS Jenzen Next
  5. Intro - SEAS Jenzen Next
Details
Ronald van Haaften By Ronald van Haaften
Ronald van Haaften

What an exhilarating project!

Nearly 18 months after receiving two substantial cartons from Michael Dahl Jantzen, I completed my set of SEAS Jenzen Next speakers. The construction process took more than nine months.That means most Saturdays and a few Sundays as long as it didn't rain. The front yard was my workshop.

I aimed to craft something divergent from the norm, reminiscent of what I did three decades ago with my Vifa Format concept. While achieving uniqueness in the speaker domain might be elusive, I'd like to think my redesign holds a special place.

Redesign TL cabinet

rovaha 058 jenzen next troels gravesen 2024

The cabinet I designed resembles a wing shape, with a gentle 7-degree inclined top. Beyond this aesthetic tweak, the volume, front baffle dimensions, transmission line, and internal panels strictly adhere to Troels Gravesen design guidelines. Frankly quite a puzzle to get all parameters in place. It proved to be a complex endeavor to shape and fit all MDF elements. It is not a project for a novice do-it-yourselfer, there are quite a few challenges. The rounded sidewalls were particularly time-intensive. However, the rewards, once realized, were wholly gratifying. 

rovaha 175 jenzen next troels gravesen 2024

Crossover

I implemented several crossover enhancements. For instance, I replaced the tweeter capacitors C1021 from Silver Z to Alumen Z, and upgraded the coils L2041, L1031, L1041, and L1051 to 16 AWG Wax Coils. Troel Gravesen's guidance, along with Michael Dahl Jantzen's, proved invaluable. Despite the extensive crossover design modifications, everything snugly fits at the cabinet's base.

How does it sound?

Having played the Jenzen for roughly 200 hours, I'm profoundly impressed by its 'neutral' sound quality, harmonizing beautifully with my Luxman amplifier. The audio experience these 1,2 meter high and 80 kg heavy speakers offer is exemplary. The Seas Crescendo tweeter is a revelation. The synergy between the T29 Crescendo and the Nextel-coated W18NX003 exceeded my expectations, delivering astonishing clarity and detail throughout their range. From the very first note, the experience was enthralling. Both high and low frequencies are well-balanced, filling the room with sound waves which carry you through the room as gracefully as a surfer rides the waves.

rovaha 241 jenzen next troels gravesen 2024

There's a welcoming warmth in the mid and high frequencies, underpinned by an unwavering bass foundation. This bass can be strikingly direct when needed, either caressing the ears or resonating with the soul. Regardless of the genre – be it jazz, classical, organ, opera, or rock – the sound captivates, pulling listeners deep into music's enchanting realm. Each track beckons for more. Lovely, just lovely!

Image library: 200+ images from scratch to final cabinet. Follow this link  

Drawing library: download drawings to build your own version of the Rovaha SEAS Jenzen next. Follow this link  

Please note: original design and enginering by Troels Gravesen. Visit his loudspeaker design website for more information and extensive knowlegde base for DIY loudspeaker design. 

Previous article: Rovaha Vifa Format | Drawing library Prev Next article: Rovaha SEAS Jenzen-Next | Drawing library Next

About the website

The Rovaha website is here to provide information and serve as a helpful resource, but it’s not meant to replace professional advice. It's designed to be a convenient and accessible space for visitors like you.

Thank you for visiting, and we hope you find value in what we share!

Ronald van Haaften at LinkedIn

Welcome to my professional LinkedIn


Who is online

We have 73 guests and no members online

(C) Rovaha 2024 | Ronald van Haaften

The Rovaha website is here to provide information and serve as a helpful resource, but it’s not meant to replace professional advice. It's designed to be a convenient and accessible space for visitors like you.

By exploring or using this non-commercial site, you agree to the terms and conditions, copyright notices, and privacy and cookie policies outlined here. Your continued use of the site means you accept these terms and agree to follow them. If these terms don’t work for you, we kindly ask that you stop using the website.

Thank you for visiting, and we hope you find value in what we share!

  • About this website
    • Privacy and Cookie Policy
    • Copyright notice
    • Term of Use
Cookies user preferences
We use cookies to ensure you to get the best experience on our website. If you decline the use of cookies, this website may not function as expected.
Accept all
Decline all
Read more
Unknown
Unknown
Accept
Decline
Analytics
Tools used to analyze the data to measure the effectiveness of a website and to understand how it works.
Google Analytics
Accept
Decline
Google Analytics
Accept
Decline
Advertisement
If you accept, the ads on the page will be adapted to your preferences.
Google Ad
Accept
Decline
Save