EAW BH-500-LR Specifications

The  BH-500-LR  is designed to offer the

advantages of low frequency horn loading in a  package

compact and durable enough for portable applications, at  a

price making it cost effective for even the smallest high

output systems. The dramatic  improvements  of a  true  horn

loaded system are realized in the BH-500's performance

including: high efficiency, wide dynamic range,  improved

pattern control and unsurpassed transient response.  True horn

loading reduces the excursion required by the  woofer for a

given output level, effectively reducing distortion and

increasing overall power handling. The BH-500-LR brings

these advanced performance features to smaller  systems

which have previously used quasi-horns or vented  boxes

because the size and cost of a true bass horn was prohibitive.

Description

The BH-500-LR is a  mathematically correct, bent,

exponential bass horn, using proprietary construction

techniques to offer ideal sonic performance in high output

applications. The bent horn design  eliminates the

performance compromises  that  plague  most of the  folded or

straight horn designs used by competitors. It is  extremely

difficult to build a true bass horn  out  of wood that  maintains

acoustical integrity and is also non resonant. Design integrity

is often compromised  by home  constructors  and competitors

to simplify construction, thereby creating a finished unit with

unacceptable resonances and response  problems. EAW has

solved this problem by using a proprietary tech

nique of reinforcing a thin layer of laminated birch  hardwood

with injected  high density polyurethane foam. The  result  is

our ability  to  produce  a  complex exponential horn cross

section  down to the critical throat area with complete

mechanical and acoustical integrity. This process results in a

horn structure which is vastly superior in rigidity,  complexity

and durability to those constructed  of wood, fiberglass  and

wood combinations.

The BH-500 also features a very low flare rate  of

40 Hz which is considerably  better  than  typical  theater  type

horns which have a flare rate of  100 to  150 Hz. Additionally

the mouth area is as large  as  possible,  effectively  the entire

cabinet frontal area and 30% to 50% larger than theater

horns. The resulting product  sets  new  standards  for smooth

deep response at high sound pressure levels in a portable

package. The BH500-LR offers as much as 8 dB more  output

in the 60 Hz to 120  Hz  region  than  vented  horn designs  and

will outperform folded horns in  response  linearity  and  high

frequency bandwidth.