Those who want a lot of bass with relatively little amplification should
use rather a bass horn. A much higher sound pressure level and better
bass response is ensured by a more efficient impedance adaptation to
the ambient air.
At these high outputs a passive crossover becomes quite expensive.
Therefore, we recommend to use an active one. The advantages are that
there are no further costs for additional crossovers and frequency adjustments
is more accurate, resulting in a better sound. If you still prefer to
use a passive crossover, we have a crossover kit available for 800 Watt
continuous (same as EM-152Sub).
Price per kit without wood, per unit: EUR 409,00
Price for crossover to be mounted on wood, per unit: EUR 228,00
Here is a building instruction for simple folded bass horn. The method: the
sound is compressed in a pressure chamber, then released through the side
openings and adapted to the air by the horn. A great and affordable driver
for a horn is the Eminence Kappa 15LF with a power handling of 600 Watts.
A simulation achieved a maximum sound pressure level of more than 130 dB (1
metre) at 2 x 600 Watts.
To achieve the same sound pressure level with conventional bass speakers approx.
8 bass reflex speakers with the same drivers are needed.
Picture right: The speaker seen from behind without rear wall.
The driver here is, however, an Eminence Pro 15, also an excellent
Price of the kit: see above
Picture left: unpainted horn without bracing rear wall
Picture right: matching rear wall with terminal cut-out
Please note: For easy maintenance the rear wall should only be screwed
Attention should be paid to tight screwing down of the rear wall. Additional
struts for fitting the rear wall are recommended.