Onyx NX12FD - Car speaker BOSS - Free user manual and instructions
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USER MANUAL Onyx NX12FD BOSS
Recommended Enclosures
Please note : Our recommended box volumes are given for internal air requirements.
NX12FD Amplitude Response(dB/Hz)
Frequency
Box Volume: 0.63 Cu Ft
These woofers are recommended to be used with sealed enclosures Box is given as internal air volume including driver displacement
NX12FD Amplitude Response(dB/Hz)
Frequency
Ported Enclosure
Box Volume: 0.92 Cu Ft
Box is given as internal air volume including driver displacement
Port Frequency : 39 Hz
Port Diameter : 3 Inches
Port Length : 9 Inches
Product Specifications
Speaker Impedance
| Free Air Resonance | (Fs) | 39.5Hz | 39.5Hz | 39.5Hz |
| Total Q Driver @ FS including all resistance's | (Qts) | 0.534 | 1.087 | 0.548 |
| Q of the Driver @ FS including non electrical resistance only | (Qms) | 7.213 | 7.242 | 7.254 |
| Q of the Driver @ FS including electrical resistance only | (Qes) | 0.642 | 1.279 | 0.635 |
| The Driver's compliance expressed as an equivalent | (Vas) | 1.426 | 1.507 | 1.562 |
| Volume of all (cubic Ft.) | ||||
| The Driver's linear displacement (inches) | (Xmax) | 0.32 | 0.32 | 0.32 |
| The DC resistance of the driver's twin voice coils(ohms) | (Re) | 1.8Ω | 3.6Ω | 7.2Ω |
| Thermal Power rating of Driver (R.M.S./Peak) | (Pe) | 900w/1800w | 900w/1800w | 900w/1800w |
| The Driver's sensitivity (dB) | (Sens) | 95dB | 95dB | 95dB |
Calculating Enclosures
It is difficult to give exact box dimensions that are universal for all cars and trucks. It is for this reason that you must be able to calculate the space in which you have available in order to achieve the proper air volume required.
It is recommended to build your enclosure from 3/4" thick MDF (medium density fiberboard).
Make sure the enclosure is sealed air tight.
Calculating External Volume
1) To calculate box volume, measure the outside Width x Height x Depth of the enclosure. Example 12'' × 14'' × 9'' = 1512''
2) Next you must convert cubic inches into cubic feet. To do this, You must divide the cubic inch total by 1728". Example 1512 ÷ 1728 = .875 Cubic feet
Calculating Internal Volume
1) To calculate the internal (net) volume of the above box you must first multiply the thickness of the wood you are using by Two (2) Example; 3/4'' × 2'' = 1.5''
2) Next Subtract 1.5 from each of the outside measurements of the box. Width 12 - 1.5 = 10.5 Height 14 - 1.5 = 12.5 Depth 9 - 1.5 = 7.5
3) Multiply the new totals (H x W x D) Example : 10.5 x 12.5 x 7.5=984.375
4) Next you must convert cubic inches into cubic feet. To do this, you must divide the cubic inch total by 1728" Example 984.375 ÷ 1728 = .5696 Cubic feet
Wiring
for the correct impedance
12”(305mm) Marine Woofer
(900 Watts RMS Sealed Enclosure)
12"(305mm) CUSTOM TOOLED HIGH EFFICIENCY
Polypropylene Cone
BUTYL RUBBER SURROUND
■ DUAL 2"(51mm) High Temperature Black Aluminum Voice Coil
1800 watts peak/900 watts RMS
FREQUENCY RESPONSE:28Hz-2KHz
■ SENSITIVITY:95dB(1WATT/1METER)
■ IMPEDANCE:DUAL 4 OHMS
■ MOUNTING DEPTH:3"(76mm)
MOUNTING DIAMETER:12.874"(327mm)
