DB Drive G7 15.2 Руководство пользователя - Страница 4
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A
Frame
Diameter
B
Mounting
Depth
C
Cutout
Diameter
RECOMMENDED ENCLOSURES
The purpose of the information below is to help you select the most appropriate type of enclosure for your
application. We have selected the two most popular enclosure types and their performance benefits.
Sealed Enclosure (Air-Suspension design): Characteristically simpler to make, sealed enclosures usually are
better at controlling the woofer's excursion and performance at lower frequencies. The added control allows
for higher power handling or use of a bigger amplifier. The secret is to maintain a perfect seal. Using glues and
sealants at all seams is recommended to prevent leaks and integrity of the enclosure. The size or volume of
the enclosure will directly affect the performance of the woofer. Smaller enclosures generally provide the
desired bump to the frequency response curb and greater SPL. Larger enclosures will provide a lower but
flatter response for deeper bass. In general, the benefit to the sealed enclosure versus a ported enclosure is a
smaller foot print, simpler build with higher power handling, a more linear flat response, superior sound quality
and extended low frequency output.
Ported Enclosure (Bass-Reflex or Vented): A ported enclosure is simply a sealed enclosure with a port or vent
added to the sealed design for the purpose of tuning the enclosure to higher output at the desired tuned
frequency, typically 3db or higher. Another advantage of a ported enclosure is the reduction of cone motion for
the speaker, thus distortion at higher power levels within the tuned frequency response of the port. A
drawback is that building a ported enclosure is more complex than sealed. Having the wrong port or vent could
result in poor sound, and the potential of damaging a woofer when played too loud or out of the tuning
frequency. Thus we recommend not guessing, please follow the guidelines listed in this manual or go to a
professional. In general, the benefit of a ported enclosure versus a sealed is higher volume output at the tuned
frequency, stronger bass output with lower power input.
Construction: We recommend using ¾" MDF (Medium Density Fiberboard) for the construction of an enclosure.
It is critical for the side walls of the enclosure not to flex due to the pressure generated by the woofer, bracing
might be required. The enclosure sides should be secured together with nails/screwed. We also recommend
the use of glues and sealants to maintain the integrity of the enclosure and eliminate leaks.
PRODUCT DIMENSIONS
A
Frame Diameter
B
Mounting Depth
C
Cutout Diameter
G7 8.2 /
G7 8.4
9.17 in.
(233 mm)
7.38 in.
(187.45 mm)
7.48 in.
(190 mm)
A
C
G7 12.1 /
G7 12.2
12.91 in.
(328 mm)
9.6 in.
(244 mm)
11.14in.
(283 mm)
4
B
G7 15.1 /
G7 15.2
15.82 in.
(402 mm)
11.75 in.
(298 mm)
13.85 in.
(352 mm)