Oddball Neo driver spec; bandpass box 4th order

[Rawr-DQ 10+ year member]

I calibrated and tested this neo oddball with a WT3 woofer tester; jacob or anyone knowledgeable; do these specs look alright; and to any bandpass enthusiast, does the box have any flaws I should be careful of falling into.

Driver Properties

Name: Neo 12" driver

Type: Standard one-way driver

Company: Sundown

No. of Drivers = 1

Dual voice coils = series

Fs = 35.66 Hz

Qms = 5.591

Vas = 1.429 cu.ft

Cms = 0.11 mm/N

Mms = 177.6 g

Rms = 7.257 kg/s

P-Dia = 10 in

Sd = 0.0507 sq.m

Qes = 1.855

Re = 3.634 ohms

Le = 4.268 mH

Z = 14.59 ohms

BL = 8.829 N/A

Qts = 1.393

no = 0.0943 %

1-W SPL = 81.84 dB

2.83-V SPL = 85.32 dB

-----------------------------------------

Trying out a 4th order bandpass design

Box Properties

Name:

Type: Bandpass Single-Tuned Box

Shape: rectangle, Bandpass

with two chambers

Chamber 1 - lower-freq.

Vb = 6.368 cu.ft

Fb = 39.39 Hz

QL = 5.207

F3 = 27.99 Hz

Fill = heavy

Chamber 2 - upper-freq.

Vb = 2.176 cu.ft

Fb = 45.89 Hz

QL = 6.239

F3 = 70.23 Hz

Fill = none

No. of Vents = 2

Vent shape = round

Vent ends = no flush

Dv = 6 in

Lv = 30 in

The box, the second smaller chamber will house about 14" of the port, they're 6 diameter and 30" long

I did more testing; here are the SS wt3 program:

Test Lead Calibration

Test lead calibration with 1k ohm resistor

Series Free Air

Series Vas Cal

Parallel Free Air

Parallel Vas Cal

Click to read more...

 

[Rawr-DQ 10+ year member]

Coil a free air

Coil a vas

Coil b free air

Coil b vas

Polarity Reversed (one coil) Parallel Free Air

 

[hispls 5,000+ posts]

Very high q on that driver. Also post pics.

 

[Rawr-DQ 10+ year member]

ok i'll get some pics of the driver

 

[Rawr-DQ 10+ year member]

 

[hispls 5,000+ posts]

Bottom plate looks huge. Wish I knew more about bandpass. I haven't invested enough time and wood into that alignment to comment.

 

[Rawr-DQ 10+ year member]

yeah its ridiculous; if this isn't loud enough for the car, it's definitely wind up as my Home Audio Subwoofer