
© 1995-2003 Wayne Harris
Pink Text indicates New for 2003
Blue Text applies only to the Street Division
Green Text applies only to the Super Street Division
Red Text applies only to the Extreme Division
dB Drag Racing Competition
dB Drag Racing is an auto sound competition format where
competitors compete against one another to see who has the loudest car stereo
system. This is the fundamental basis for a dB Drag Racing event.
The dB Drag Racing Association (dBDRA) has gone to great
lengths to ensure that the rules for competing in dB Drag Racing are as
comprehensive and unambiguous as possible. Even so, there will invariably be
times when a particular application or installation will fall outside the scope
of this rulebook. When those occasions arise, it is the responsibility of
the head judge to make a determination as to whether the incident in question
abides by the “spirit” of dB Drag Racing competition. As a competitor, it is
your responsibility to understand the rules contained in this book and to abide
by any decisions rendered by the head judge.
dB Drag Racing Creed
Safety Guidelines
The safety of the competitors, judges, and bystanders at a
dB Drag Racing event are of paramount importance. As the operator of the
competition vehicle and its sound system, the competitor has a tremendous
responsibility both to himself and to those around him with regards to safety.
Competitors should clearly understand the following issues prior to
participating in a dB Drag Racing event.
The dB Drag Racing Association and it’s affiliates are not
qualified to determine the safety and/or legality of a given competition
vehicle. This responsibility lies with the competitor. As such, the dB Drag
Racing Association and its affiliates cannot be responsible for any accidents,
damages, or injuries that occur at a dB Drag Racing event. By participating in a
dB Drag Racing event, the competitor agrees to take full responsibility for his
or her actions and any accidents, damages, or injuries that may occur. The dBDRA
strongly encourages competitors to operate their vehicles and sound systems in a
manner that is consistent with local laws. Flagrant disregard for safety will
result in disqualification and subsequent ejection from the event.
1-1
Competitors may use the program material of their choice
while competing.
·
The program material being played must originate from a
source unit that is specifically designed for installation and operation in a
12-Volt auto sound environment. This includes cassette decks, CD players and
changers, DVD players and changers, VCR’s and VCP’s, MP3 units, AM / FM /
Satellite radio tuners, and any other playback device that is specifically
designed for installation and operation in a 12-Volt auto sound environment.
·
The program material may consist of music, test tones, or
any other type of recorded audio signal.
·
The program media may be from a commercial source (such as a
CD you purchase) or a custom, homemade recording.
·
Tone generators, frequency multipliers, harmonizers, etc.
are prohibited.
Exceptions:
·
Competitors must use the official dB Drag Racing competition
CD (dB Jams Volume 6) at all multi-point events.
·
Competitors are limited to playing frequencies between 20 and 80 Hz and below at all multi-point events. If a competitor's highest SPL is
achieved at a frequency below 20 Hz or above 80 Hz, then that competitor’s score will be disallowed. If the
violation occurs during the qualifying rounds, the competitor may be granted a
retry at the sole discretion of the head judge. If the violation occurs during
the elimination rounds, the competitor will be eliminated from the competition,
regardless of the competitor’s score.
1-2
Adjustments to the sound system may be made while the
vehicle is being metered as long as no other applicable rules are violated
during the adjustment process. (Metering is the process where the Sound Pressure
Level or SPL of your vehicle is measured.)
1-3
The contestant’s vehicle may be running while in the judging
lanes as long as the following conditions apply:
·
The contestant is competing in the Super Street or Extreme
Divisions of competition. Contestants competing in the Street Division are
prohibited from running their vehicles while in the judging lanes. (Please see
Section 2 for a complete description of the Competitor Classification
System.)
·
Operation of the vehicle or sound system must not endanger
the judge, competitor, spectators, or any real or personal property on the
premises.
·
The vehicle’s parking brake must be set.
·
The wheels must be chocked.
·
The hood must be closed.
·
The maximum engine idle speed must not exceed 2000 RPM.
·
A remote “engine kill switch” must be easily accessible from
outside of the vehicle for those competitors that are bolting (clamping,
strapping, etc.) the doors of the vehicle closed while in the judging lanes.
It is the competitor’s responsibility to comply with the
conditions listed above. Competitors found to be in violation of one or more of
these conditions shall be disqualified from the competition.
1-4
The contestant must be outside of the vehicle while the
vehicle is being metered and all doors, windows, and other openings to the
vehicle must remain closed during this time.
Exception - Competitors may remain inside of the vehicle during
metering provided:
·
They wear adequate hearing protection at all times. Removal
of the hearing protection while inside of the vehicle will result in immediate
disqualification.
·
The competitor’s maximum SPL never exceeds 140 dB. A
measured SPL in excess of 140 dB will be recorded as 140 dB.
·
The competitor signs a dB Drag Racing entry form that
includes a waiver stating that the competitor understands that “exposure to high
sound pressure levels may result in temporary or permanent hearing loss”.
1-5
When the SPL metering process begins, contestants will have
30 seconds to achieve their highest Sound Pressure Level (SPL). The SPL metering
equipment will record and save each competitor’s high score during this 30
second judging interval.
Special Provision:
·
Show promoters may elect to use the Enduro judging format at
single point events. In an Enduro format, a contestant’s score will be averaged over the entire judging interval (typically 30
seconds).
1-6
Contestants may not open their vehicle during the metering
process. If a contestant opens his or her vehicle while being metered, the
competitor may be disqualified. If the violation occurs during the qualification
rounds, the competitor may be granted a retry at the discretion of the head
judge. If the violation occurs during the elimination rounds, the competitor
shall be disqualified from the competition.
Competitors are classified by the number of woofers in their
system and the extent to which their vehicle has been modified. For specific
limitations regarding vehicle modifications for each division, refer to Sections
3-5 later in this rulebook.
2-1
The dBDRA
considers speakers with maximum diameters of 8 inches or larger to be
woofers.
2-2
All of
the woofers in a vehicle (8 inches and larger) will be counted when determining
what class a competitor should compete in.
Additional
Guidelines:
·
Every
woofer in an Isobaric or Compound configuration shall be counted.
·
Hidden
woofers (such as those found in Bandpass enclosures) shall be counted.
·
Passive
radiators, ports, and vents are not considered to be woofers, and therefore will
not be counted as such.
2-3
“Token”
woofers are strictly prohibited. If a competitor has installed woofers in such a
manner as to circumvent the competitor classification system, the competitor may
be re-classified or disqualified at the sole discretion of the head judge.
Example:
·
A
competitor who normally competes in the Super Street 1-2 class shows up at an
event and decides that his normal class is too competitive for his taste. In an
effort to circumvent the competitor classification system and move up into the
Super Street 3-4 class, the competitor borrows 2 woofers and then lays them in
the back of his vehicle. Now, there are a total of 4 woofers in the vehicle,
even though the 2 woofers he just “installed” are not a legitimate part of the
sound system. Activities such as this are strictly prohibited.
2-4
Each competitor may compete in one, and only one class at
each dB Drag Racing event.