SEALED ENCLOSURES
Sealed enclosures are the simplest to build.The most important part of
building a sealed enclosure is to make sure that the enclosure is airtight.
Using glue and some type of sealant on all seams will ensure solid
construction and prevent air leaks.The box volume will directly impact the
performance of the speaker. Larger enclosures will provide flatter
response and deeper bass where smaller boxes will provide a bump in the
response curve and generally higher output for greater SPL.
Advantages of sealed enclosures:
• Small enclosures
• Linear (Flat) response
• No port noise
• High power handling at all frequencies
• Excellent for sound quality
• Extended low frequency output when compared to vented enclosures
BUILDING AN ENCLOSURE
To work properly, the walls of the enclosure must be rigid and not flex
when subjected to the high pressures generated by the speaker's
operation. For optimum performance, we recommend using 3/4" MDF
(Medium Density Fiberboard) and internal bracing.The enclosure should
be glued together and secured with nails or screws.
CALCULATING VOLUME
Calculating volume is merely a matter of measuring the dimensions in
inches and using the formula: H x W x D divided by 1728 (cubic feet). See
block below.
If two facing sides are of uneven length, add them together and divide by
two to take the average. Using this number will give you the volume
without the necessity of calculating the box in sections and adding the
sections together.The thickness of the baffle material reduces the internal
volume so this must be subtracted from the outside dimensions to
determine the internal volume.The speaker itself also reduces the
internal volume.The amount of air displaced by each model is listed on
the specification sheet and should also be subtracted from the gross
volume calculation.
2
*NOTE: Vb is NET volume (internal volume needed for
woofer). Speaker, bracing and/or port displace-
ment should be added to this volume.
External
dimensions are based on 3/4" (1.90cm) MDF.
NOTE:
When using enclosures other than recommended, con-
tact RFTECH Support for correct application.
S
AFETY
C
ARTON
C
ONTENTS
CAUTION:
Before installation, disconnect the battery
negative (-) terminal to prevent damage
to the unit, fire and/or possible injury.
• (1) Prime R1 Series Subwoofer
S
EALED
E
NCLOSURES
R
ECOMMENDED
E
NCLOSURES
Box Volume
Height" x Width" x Depth"
Divided by (cubic feet)
1728
Specifications subject to change without notice
Optimum Sealed Enclosure Recommendation
Recommended Sealed Enclosure Volume Range
SEALED ENCLOSURES
10"
12"
R1S410
R1S412
Vb* Internal Volume cu.ft. (Liter)
0.75 (21.24)
1.02 (28.88)
F3
-3dB Point (Hz)
50.9
43.5
Qtc
Enclosure Damping
0.875
1.097
H
Height-inch (cm)
14 (35.56)
14 (35.56)
W
Width-inch (cm)
17 (43.18)
18 (45.72)
D
Depth-inch (cm)
8.25 (20.96)
10 (25.40)
SEALED ENCLOSURES
10"
12"
R1S410
R1S412
Vb Volume Range cu. ft.
0.50 to 0.85
0.70 to 1.80
(Liter)
(14.16 to 24.07)
(19.82 to 50.97)
H
W
D
H
W
D
P
PRIME R1-SVC
10"
12"
Nominal Impedance (ohms)
4
Ω
4
Ω
Frequency Response
24Hz - 250Hz
22Hz - 250Hz
Voice Coil Diameter
1.5” (6-Layer)
1.5” (6-Layer)
(3.8cm)
(3.8cm)
Fs - Free Air Resonance
24 Hz
22 Hz
Qts
0.4
0.49
Vas - cu. ft.
3.0
6.89
(Liters)
(85)
(195)
Xmax
0.23”
0.25”
(5.8mm)
(6.3mm)
SPL (dB @ 1w/1m)
86 dB
87 dB
Power Handling (Watts)
150 Watts RMS
150 Watts RMS
300 Watts Max
300 Watts Max
S
PECIFICATIONS
F
EATURES
•
Parabolic polypropylene cone.
•
12 AWG compression terminals.
•
18 gauge stamped steel frame.
•
Available in single 4 ohm.
•
Optimized for sealed enclosures.
PRACTICE SAFE SOUND™
Continuous exposure to sound pressure levels over 100dB may
cause permanent hearing loss. High powered auto sound systems
may produce sound pressure levels well over 130dB. Use common
sense and practice safe sound.
