Seas 403 Revisited Kit - Assembled Crossover PAIR

Seas 403 Revisited Kit Assembled Crossovers - PAIR

Crossovers Only- does not include Speaker Drivers or Cabinets

Seas 403 PDF

This is for a pair of assembled crossovers for the Seas designed 403 Revisited kit, a speaker first introduced in the 70's.

Here is a link to the entire kit design on the Seas website: Seas 403 Revisited

This project brings together decades of audio craftsmanship, modern engineering, and a passion for timeless sound. Developed in collaboration with cultural entrepreneur and music lover Martin Revheim, the 403 Revisited pays tribute to SEAS’ 75-year legacy of innovation while making the joy of true high-fidelity audio more accessible than ever.

The kit is a classic wide-baffle, 3-way design housed in a beautiful stand mount enclosure. It delivers a smooth and balanced sound with impressive sensitivity and a rich, controlled bass response from its 10-inch woofer. The speaker’s natural tonality and musicality make it equally at home in casual listening spaces and dedicated hi-fi setups – a timeless design reimagined for modern music lovers.

Here are links to the loudspeakers used in the 403 Revisited:

• 3/4" textile dome tweeter: 22TFF
• 4.5" paper cone midrange: MCA12RC
• 10" paper cone 4-layer VC woofer: CA26RE4X

You can upgrade this crossover further to Mundorf Flat Foil inductor and Clarity CSA capacitor via the dropdown menu.

CSA configuration

Tweeter:

CSA-6.8

CSA-15

0.27mH air core

MOX 1 ohm

MOX 27 ohm

Midrange:

CSA-47

3.9mH air core

0.82mH air core 16awg

XPP-15-400V

Woofer:

Steel Laminate 2.7mH 15awg

MDL-150

25R2.7

The parts will be assembled on several circuit boards. Internal wiring will need to be soldered to the boards and a hookup sheet will be provided.

This crossover is specifically designed for the speakers in the kit. It is not recommended to use this crossover with any other speakers. This custom made product is not returnable.

CSA & CFC Crossover Configuration:

CSA capacitors on the tweeter and midrange

CFC16 copper foil on the midrange series inductor and the woofer

XPP-150-400V on the woofer