Bass reflex Quasi-6th order bp port length "all in one"
box calculator
Reflex wall calc

 Number of ports 

Diameter cm

Tuning Hz

length cm

volume in litres

   K

=cm
=Hz
----
=cm²
----
=% / l
=% / l

 Number of vents 


Vent area cm²

Tuning Hz

Length cm

Volume in litres

   K

=cm
=Hz
----
=cm²
----
=% / l
=% / l
  


FRONT

Number of vents

Vent area cm²

Tuning Hz

Volume in litres

=15.833cm
REAR

Number of vents

Vent area cm²

Tuning Hz

Volume in litres

=49.199cm
  

Sub diameter "

Number of subs

Tuning Hz

% of Wavelength

Volume in litres
=282.74l
Port length
=68.6cm
Port area
=514.4cm²
Port volume
=35.3l
Port air mass
=42.36g



Port length relative
to wavelength

Tuning Hz

% of wavelength


Volume in litres

Portlength
=68.6cm
Port area
=444.7cm²
Port volume
=30,5l
  

 Number of vents 


Vent area cm²

Tuning Hz

Vent length cm

Volume in litres

Cabin volume l

Cabin factor

   K

=19.9cm
=31.4Hz
----
=2,6%
=7,3%
  


Area

Width cm

Height cm

Amount

=1200cm²
diameter cm

Amount

=277.591cm²

Sealed fc & f3

Reciprocal of the
sum of reciprocals

Box volume calculator

"Simple wiring calculator"

Qts

VAS in litres

Box volume in litres

FS Hz

Qtc=0.841
fc=38.297Hz
f3=33.144Hz
Value 1

Value 2

=521,739




Coil Ω

Coils per sub

Subs

Coils in series
subs in parallel
=1Ω
Coils in parallel
subs in parallel
=0,25Ω

Some electrical calcs


 Propper droppers 
score


40Hz
33Hz
25Hz
20Hz

score=

U=sqrt(P*R)

Power

Ω

=24.495V

Voltage or power
difference in dB



Value 1

Value 2

=3dB

dB -- >

V or W

Start value

change in dBs

=6000

 EMMA 
max fuse size
  i.e. 2% loss max

Cable size mm^2

Cable length
(+ & gnd total, metres)

Voltage

Cable material


Maximum fuse
=857.1A

 EMMA 
minimum cable size
  i.e. 2% loss max


Current A

Cable length
(+ & gnd total, metres)

Voltage

Cable material


Minimum cable size
=43.8mm^2


 Speakerwirelosses 

Power W

Impedance Ω

Cable length m

Cable size mm2

Cable material
Voltage=V
Cable=Ω
Current=A
Vloss=V
Ploss=W
Loss=%
Loss=dB

Amplifier output
power scaling
by input voltage

Voltage 1

Voltage 2

Power @ V1


=5459.06W
Difference:
=2259.00W
=2.320dB

 12V Losses 

Current A

Cable size mm^2

Cable length m

Battery voltage V

Cable material

Power=W
Cable=Ω
Vloss=V
Amp input=V
Ploss=W
Ploss/m=W/m
Amp input=W
Loss=%
Loss=dB















  Batterystuff 

internal res mΩ

Batteries pcs

Current A

"No-load" V

V drop=V
Battery V=V

Resistance calc

"No-load" V

Current A

V under load

Resistance=10,00


 dB/W 

Power

SPL dB

=121.218dB/W

Sine tone generator

      (((PD))) Tones      



  -3dBFS test tones  



0dBFS
    hz
 

40Hz


33Hz


25Hz


20Hz



10Hz

100-20Hz sweep 1:20


100-1Hz sweep 35s


120-10Hz sweep log 35s


Pink noise 5min


1Hz-100Hz burst sweep






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