Peavey DTH 218b User Manual
SPECIFICATIONS
DTH® 218b
Low-Frequency
Loudspeaker
SPECIFICATIONS
Frequency Response, 1 Meter
On-Axis, Swept Sine in Anechoic
Environment:
45 Hz to 250 Hz
Low-Frequency Cut-Off (-3 dB point):
45 Hz
Usable Low-Frequency Limit
(-10 dB point):
35 Hz
Power Handling:
Speakers Parallel:
1,000 W continuous (63.2 V RMS)
2,000 W program
4,000 W peak
Speakers Independent:
500 W continuous (63.2 V RMS)
2 x 1,000 W program
2000 W peak
Sound Pressure Level, 2.0 V (1 watt)
• 1 meter in anechoic environment:
100 dB
Maximum Sound Pressure Level:
128 dB continuous
134 dB peak
Transducer Complement:
Two BW X 1888 HP Black Widow® X
Woofers
Box Tuning Frequency:
47 Hz
Recommended Crossover
Frequency:
150 Hz to 250 Hz range
Impedance (Z):
Speakers Parallel:
4 ohms nominal
3.2 ohms minimum
Speakers Independent:
8 ohms nominal
2 x 6.4 ohms minimum
Input Connections:
One Neutrik® four-conductor Speakon
(NL4MP)
One Neutrik® eight-conductor Speakon
(NL8MP with four-conductor NL4MP
output)
Enclosure Materials and Finish:
3/4" plywood with black polyurethane
coating, black powder coat, metal grill
and polyester foam overlay grille
Dimensions (H x W x D):
47 1/4" x 22 3/4" x 29 3/4"
(120 cm x 57.8 cm x 75.6 cm)
Net Weight:
145 lbs. (64 kg)
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FEATURES
• Dual BW X 1888 HP Black
Widow® X woofers
• Anti-axial driver arrangement
• 16-gauge powder coated metal
grill with foam overlay
• Four-and eight-conductor input
with four-conductor output
• Black polyurethane coating
• Rear casters
DESCRIPTION
The DTH® 218b is a perfect match
as an additional low-frequency
enclosure for any of the DTH
enclosures. This enclosure is
loaded with two BW X 1888 HP
Black Widow® X Woofers.
One of these woofers has been
mounted backwards (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 evenorder 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® 4210. By using this output,
you will have only one “home run”
of a cable going to your amps
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instead of two four-conductor
cables. A black polyurethane
coating covers the DTH 218b.
This is a low-wear, high abrasionresistant material, similar to those
used in the automotive industry. 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® 218b is measured at 1
meter using a 2.0-volt swept sine
input. As shown in Figure 1, the
drivers in the DTH 218b 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 hightechnology music. The test signal
contains large amounts of very lowfrequency 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 impedance shall be 4 ohms with speakers
paralleled, 8 ohms with speakers
independently powered. The
continuous power handling shall
be 1,000 watts, with maximum
program power of 2,000 watts and
minimum amplifier head-room of
3 dB with speakers paralleled. The
continuous power handling shall
be 500 watts x 2, with maximum
program power of 1,000 watts x 2,
and minimum amplifier headroom
of 3 dB with speakers independently powered. The outside
dimensions shall be 22 3/4 inches
wide by 47 1/4 inches high by
29 3/4 inches deep. The
weight shall be 145 lbs. The
loudspeaker system shall be a
Peavey model DTH® 218b.
DTH® 218b
110
100
90
80
SPL (dB re 20 Pa)
70
60
25
Figure 1
1W 1m On-Axis Response
2
10
1W 1m On-Axis Response
3
25
Frequency (Hz)
10
4
25
10
2
70
65
60
55
50
45
40
35
Z( )
30
25
20
15
10
5
0
25
Figure 2
Impedance
Impedance
2
10
25
3
10
Frequency (Hz)
25
10
4
2
75.6 cm
29.75"
DTH® 218b Dimensions
57.8 cm
22.75"
120 cm
47.25"
75.6 cm
29.75"
120 cm
47.25"
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