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.