Marcus
2.5-way speakers were always treated as the “poor relative” of 3-way speakers. They did also not gain any respect as some 2-way constructions.
In the Marcus we tried to combine typical assets of 3-way speakers (powerful bass) with characteristics of 2-way speakers (quick bass, openness and precision in the midrange).
This is our idea of a 2.5-way speaker:
1. Differentiation of speakers (18cm and 22cm). This allows for reaching low bass (the 22cm speaker) and high quality, non-colored midrange from the 18cm one.
2. Pulling the bass driver to front, what allowed to get rid of a “hole” in the frequency characteristics in the few hundred Hertz range, that exists in most 2.5-way speakers.
3. Application of separate chambers for the speakers: a small chamber for the 18cm driver – to limit the cone movements, and a large chamber for the 22cm speaker allowing it to expand the low frequencies.
4. A speaker set-up allowing for time-coherent co-working.
In conclusion: The Marcus combine the assets of 2 and 3-way speakers, eliminating most of their shortcomings. A question rises then: Why were not all models designed as 2.5-way? The answer is simple: The Marcus is the biggest speaker that can be properly designed as such. Larger models must be 3-way with all their assets and flaws.
Speaker setup:
Recommended listening room size: 15 - 90m2
Distance from the walls (recommended minimum distance counted from the front baffle):
From the back wall – 100cm, from the side walls – 70cm.
Recommended listening height: Tweeter axis +- 20cm.
2.5-way speakers were always treated as the “poor relative” of 3-way speakers. They did also not gain any respect as some 2-way constructions.In the Marcus we tried to combine typical assets of 3-way speakers (powerful bass) with characteristics of 2-way speakers (quick bass, openness and precision in the midrange).
This is our idea of a 2.5-way speaker:
1. Differentiation of speakers (18cm and 22cm). This allows for reaching low bass (the 22cm speaker) and high quality, non-colored midrange from the 18cm one.
2. Pulling the bass driver to front, what allowed to get rid of a “hole” in the frequency characteristics in the few hundred Hertz range, that exists in most 2.5-way speakers.
3. Application of separate chambers for the speakers: a small chamber for the 18cm driver – to limit the cone movements, and a large chamber for the 22cm speaker allowing it to expand the low frequencies.
4. A speaker set-up allowing for time-coherent co-working.
In conclusion: The Marcus combine the assets of 2 and 3-way speakers, eliminating most of their shortcomings. A question rises then: Why were not all models designed as 2.5-way? The answer is simple: The Marcus is the biggest speaker that can be properly designed as such. Larger models must be 3-way with all their assets and flaws.
Speaker setup:
Recommended listening room size: 15 - 90m2
Distance from the walls (recommended minimum distance counted from the front baffle):
From the back wall – 100cm, from the side walls – 70cm.
Recommended listening height: Tweeter axis +- 20cm.
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Technical specifications:
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| System description: Drivers: |
2,5-way bass reflex tweeter: 25 mm mid driver: 18 cm bass driver: 22 cm |
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| Freq. Response: | 32-25000 (+/- 3 db) | |
| Power Handling: | 200 W | |
| Sensitivity: | 92 db | |
| Impedance: | 4 ohm | |
| Net Weight: | 39,5 kg / single | |
| Dimensions (Height x Width x Depth) | 104,5 x 23,7 x 45 cm | |
© Harpia Acoustics 2007 :: design: igor herzyk