DESCRIPTION
The DTH
®
215b is a perfect match
as an additional low-frequency
enclosure for any of the DTH
®
enclosures. This enclosure is
loaded with two 1505-8DT Black
Widow
®
drivers. One of these
woofers has been mounted back-
wards (its electrical polarity has also
been reversed so that its acoustical
polarity is identical to
the other woofer). The anti-axial
arrangement of the drivers
eliminates virtually all even-order
harmonic distortion. Maximum
versatility was our main goal
when considering the input to
this loudspeaker. Both drivers are
connected to a Neutrik
®
four-
conductor Speakon
®
connector.
The drivers are also connected to
one half of a Neutrik
®
eight-
conductor Speakon
®
connector.
The other half of this connector is
hooked up to a second Neutrik
®
four-conductor connector. This
connector serves as an output to
another loudspeaker such as a
DTH
®
215b. By using this output,
you will have only one “home run”
of a cable going to your amps
instead of two four-conductor
cables. A black polyurethane
coating covers the DTH 215b. A
heavy-duty, 16-gauge metal grille
with polyester foam overlay dresses
off the enclosure and provides
superior protection for the drivers.
All this combines to give you a
great-looking and great-sounding
subwoofer perfectly suited to any
low-frequency sound reinforcement
application.
FREQUENCY RESPONSE
This measurement is useful in
determining how accurately a given
enclosure reproduces an input
signal. The frequency response of
the DTH 215b is measured at 1
meter using a 2.0-volt swept sine
input. As shown in Figure 1, the
drivers in the DTH 215b combine to
give a smooth frequency response
from 45 Hz to 250 Hz.
POWER HANDLING
There are many different
approaches to power handling
ratings. Peavey rates this speaker
system's power handling using a
modified form of the AES Standard
2-1984. Utilizing audio band
(20 Hz to 20 kHz) pink noise with
peaks over four times the RMS
level, this strenuous test signal
assures the user that every portion
of this system can withstand today’s
high-technology music. The test
signal contains large amounts of
very low frequency energy,
effectively simulating the frequency
content of live music situations. The
full measure of high frequencies in
the test signal allow for exposure of
the speaker system to synthesized
tones that may extend beyond
audibility. This rating is contingent
on having a minimum 3 dB of
amplifier headroom available.
ARCHITECTURAL
AND ENGINEERING
SPECIFICATIONS
The loudspeaker system shall have
an operating bandwidth of 45 Hz to
250 Hz. The output level shall be
100 dB when measured at a
distance of one meter with an input
of one watt. The nominal imped-
ance shall be 4-ohms with speakers
paralleled, 8-ohms with speakers
independently powered. The
continuous power handling shall
be 700 watts, with maximum
program power of 1400 watts and
minimum amplifier headroom of
3 dB with speakers paralleled. The
continuous power handling shall
be 350 watts x 2, with maximum
program power of 700 watts x 2,
and minimum amplifier head-
room of 3 dB with speakers
independently powered. The
outside dimensions shall be
18-3/4 inches wide by 39-3/4 inches
high by 30-3/4 inches deep. The
weight shall be 123 lbs. The
loudspeaker system shall be a
Peavey model DTH 215b.
