Excel Akerselva MK2 floorstanding speakers Kit with high-end crossover

Name: Excel Akerselva MK2 floorstanding speakers Kit with high-end crossover
Brand: seas
SKU: Excel Akerselva MK2
Price: 1820 EUR
Availability: InStock

Excel Akerselva MK2 floorstanding speakers Kit with high-end crossover

Kit with high-end crossover without housing price per speaker

The high-end kit is equipped with baked enamel and foil coils to reduce the microphonic effect (the current through the coil generates a magnetic field, which in turn sets the winding in motion. This movement induces voltages in the coil, which are added to the useful signal. The tighter the winding of the coil, the less the useful signal is distorted.) All capacitors in the direct signal path are of the MKP type and the capacitors for the tweeter - where quality is particularly important - are high-quality Clarity Cap capacitors of the MR type with 630 V and the CSA type with 630 V.

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Excel Akerselva MK2 floorstanding speakers Kit with high-end crossover

Kit with high-end crossover without housing price per speaker

Akerselva MK2 is a 3-way high-end floor-standing loudspeaker with a coaxial mid-high-frequency loudspeaker and four woofers. The loudspeaker consists of a very high-quality SEAS Excel C18EN002/A coaxial loudspeaker for the mid- and high-frequency range. The bass range is handled by 4 Wavecor SW182BD03 woofers in a closed housing, which ensures particularly high bass precision. The crossover consists of a 2nd order high-pass filter (12 dB / octave) for the tweeter, a bandpass consisting of 2nd and 3rd order high- and low-pass filters with a voltage divider for the mid-range speaker and a 2nd order low-pass filter with an absorption circuit to smooth out the impedance peak for the woofer. The frequency response of the loudspeaker is very linear between 40 Hz and 18,000 Hz. The decay spectrum is almost error-free above 500 Hz. The nonlinear distortions at low volumes (85 dB, 1m) are below 0.6% above 500 Hz and do not rise above 1% in the audible range even at higher levels (95 dB, 1m).

Technical data:

Impedance: 4 Ohm
Sound pressure level (2.83V/1m): 83 dB
Dimensions (HxWxD): 1100 x 240 x 365 mm
Frequency range (-8dB): 30 - 40000 Hz
Crossover frequency(s): 220, 2500 Hz
Principle: closed box

Highlights

Seas Excel coaxial loudspeaker C18EN002/A (E0060-08/06S) 4
x Wavecor SW182BD03, 4 Ohm, subwoofer with cast basket
2x insulation fleece MT Bondum 800 (30 x 50 x 2 cm)
5x insulation material Sonofil 100 x 35 cm for 20 liters
Pole terminals PK31, one pair, gold-plated, red+black
4m speaker cable 2x1.5 mm2 black/red
3x pan screws 3.5x17 black, 8 pieces
Pan screws 4x20 black, 8 pieces
Construction plan for the kit the crossover components (right), to be assembled on a wooden board.
Audaphon MKP CAP Superior 1.8 μF / 400 Vdc
2x Audaphon MKP CAP Superior 2.7 μF / 400 Vdc
Audaphon MKT capacitor 15 μF / 160 Vdc
2x Audaphon MKT capacitor 47 μF / 160 Vdc
2x Elko rough, 220 μF/63 Vdc
Mundorf baked varnish air coil BL71, 0.015 mH
Mundorf air coil L140, 0.47 mH/0.19 Ohm
Mundorf air coil L140, 0.56 mH/0.20 Ohm
0.7 mm air coil, 0.47 mH/0.50 Ohm
0.7 mm air coil, 3.3 mH/1.75 Ohm
Mundorf BS140 core coil 6.8mH/0.3Ohm
Mundorf H-core coil H71, 3.3 mH/0.47 0hm
Mundorf H-core coil H71, 33 mH/1.93 0hm
2x ceramic resistor 10 Ohm/20 Watt
Metal oxide resistor MOX10 2.2 Ohm (red-red-gold)
2x metal oxide resistor MOX10 10 Ohm (brown-black-black)
2x metal oxide resistor MOX10 12 Ohm (brown-red-black)
Metal oxide resistor MOX10 47 Ohm (yellow-violet-black)

Reference Excel Akerselva MK2

In stock 2 Items

SEAS is a highly respected brand in the world of high-fidelity (HiFi) speakers, known for its high-quality drivers and custom speaker components. The company, based in Norway, has been in the speaker manufacturing business since 1950. They specialize in producing premium speaker drivers—everything from woofers and tweeters to midrange drivers, which are used by audiophiles and speaker manufacturers worldwide.

Here's a closer look at what makes SEAS stand out:

1. High-Quality Drivers:

SEAS is renowned for its high-performance drivers, which are often used in custom speaker builds or high-end commercial speaker systems. These drivers are crafted with precision to deliver accurate, natural sound. The range of drivers they produce includes:

Woofers: SEAS woofers are known for their deep bass response and low distortion. They use materials like polypropylene, aluminum, and paper cones to balance rigidity and lightness.
Tweeters: SEAS offers both soft dome and metal dome tweeters, with a focus on smooth high-frequency response and wide dispersion. Their aluminum, titanium, and ceramic tweeters are highly regarded for their ability to deliver crisp, detailed highs.
Midrange Drivers: SEAS midrange drivers focus on clarity and accuracy in the critical midrange frequencies. These drivers are built to produce natural-sounding vocals and instruments, and are often paired with woofers and tweeters in full-range speaker systems.

2. Technology and Materials:

SEAS uses cutting-edge materials and engineering techniques to optimize the performance of their drivers. Some of the advanced technologies they employ include:

Aluminum and Magnesium Cones: Used for their light weight, rigidity, and damping properties, which help reduce distortion while maintaining excellent sound accuracy.
Silk and Paper Domes: Their soft dome tweeters, particularly those with silk or paper materials, are designed for smooth high frequencies and a more natural sound profile.
Ferrofluid Cooling: Many of SEAS’ high-end tweeters and midrange drivers feature ferrofluid cooling to help improve power handling and reduce distortion.
Improved Suspension Systems: SEAS uses advanced suspension designs to control the movement of the speaker cone, helping to improve both efficiency and linear motion for more accurate sound reproduction.

3. Custom Speaker Components:

SEAS doesn’t just make standalone drivers; they are also known for creating complete speaker kits and custom solutions for speaker manufacturers. Many high-end speaker brands use SEAS drivers in their systems because of their precision and reliability.

4. Famous Series from SEAS:

SEAS Excel Series: The Excel line is SEAS’ flagship range and is designed for audiophiles and serious enthusiasts. These drivers use advanced materials like magnesium alloy cones and diamond-coated surfaces, ensuring top-tier performance with ultra-low distortion and a highly accurate sound profile. All Excel drivers feature gold-plated connectors for low contact resistance and exceptional reliability. In the SEAS Excel T25CF002 Millennium tweeter, for example, the patented hexadymium magnet system further reduces reflections and back pressure by completely venting the voice coil gap and the space behind the cone suspension. The SEAS Excel T25CF001 features an optimally shaped cone and a large SONOMEX suspension, both produced by SEAS, to ensure excellent performance and consistency.
SEAS Prestige Series: This line offers a more affordable option without sacrificing quality. The Prestige drivers are commonly used in high-end DIY speaker projects. The SEAS Prestige MCA15RCY, for example, is a 15 cm diaphragm driver designed for use as a high-quality midrange. The classic coated paper cone offers a smooth and extended frequency response with controlled roll-off. The large magnet system, together with the lightweight cone, provides high sensitivity with low distortion and good transient response. The SEAS Prestige 27TBCD/GB-DXT is a high-resolution aluminum/magnesium alloy tweeter with a DXT® lens. An optimally shaped dome and a large SONOMEX surround, both produced by SEAS, ensure excellent power and coherence. The SEAS Prestige CA22RNY, an 8-inch woofer, features a classic hand-coated paper cone. A matching natural rubber surround creates a well-deflected roll-off characteristic and reduces potential resonance problems.
SEAS Extreme Line:SEAS Extreme woofers are designed and crafted to perfection to enhance the low-frequency experience in any audio system. The drivers can be used in all types of applications, such as closed cabinets, passive radiator systems and open diaphragms. The SEAS L26ROY - XM001-04 , a 10-inch woofer, for example, features an extremely rigid aluminum cone that delivers incredible bass accuracy. The cone and low-loss rubber surround do not exhibit the typical resonance and edge distortion signals typical of soft cones. The cables, sewn symmetrically to the spider, are embedded to prevent resonance. The overall suspension ensures stability during extreme excursions

5. Applications:

SEAS drivers are used in:

DIY speaker projects: Many audiophiles build their own custom speakers using SEAS components due to their reputation for high performance and excellent build quality.
HiFi loudspeakers: SEAS components are commonly found in high-end speaker systems, both from well-known speaker brands and boutique manufacturers.
Professional audio: SEAS drivers are sometimes used in studio monitors or professional sound systems due to their accuracy and clarity.

Why Choose SEAS?

Accuracy and Natural Sound: SEAS drivers are known for producing very accurate, natural sound. If you’re looking for a speaker that can reproduce music as close to the original performance as possible, SEAS is a top choice.
Durability and Longevity: SEAS has a long history in the speaker industry, and their drivers are built to last. The materials they use are chosen for their robustness, meaning their products can handle high power while maintaining their sonic integrity.
Reputation for Quality: As a brand, SEAS is highly respected in the audio industry, particularly for producing precision-engineered drivers that are trusted by both DIYers and professional speaker manufacturers.
Innovation: With their focus on new materials and technologies, SEAS is constantly pushing the boundaries of what’s possible in speaker design.

Are SEAS Drivers Right for You?

If you’re an audiophile or someone who wants to build or upgrade a high-end sound system, SEAS components could be a great option. Their high-fidelity drivers provide exceptional clarity and accuracy, making them ideal for critical listening environments, such as in a home theater or music listening room.

Are you thinking about building a custom speaker setup, or are you more interested in purchasing a pre-built speaker that uses SEAS drivers? Let me know what you're aiming for, and I can help guide you through your options!