Cubo 18

Hello I am new here and I am interested in rebuilding the Cub18. I have a question: Does it matter whether the magnet is in the chamber or facing outwards?
Many thanks Josef.

For best low end mount the magnet in the horn, for a warmer tone to the sound and a bit less low frequency, mount the magnet in the chamber.

Hello!

Just built this box and about to buy a speaker to it. would the B&C 18TBX100 be a good option?

Another question would RCF L18P400 be a better option than the B&C 18TBX100

Hi,

If you're going for a new driver, I'd consider the 18NW100. My personal preference is:

1. 18NW100
2. RCF L18P400
3. 18TBX100

The 18TBX100 is a good choice but I strife to get the lowest Qts, highest EBP driver possible.

Good morning
I have 4 Cubo 18 extended in South Florida. I no longer need them, going with self-amplified

Hi !
I could have RCF L18P540, seems like it is a suitable option, would you confirm me ?
Thanks !!!

Specifications
Nominal Basket Diameter
18"
Impedance
8 ohms
RMS Power Rating
350 Watts

Program Power 700 Watts
Peak Power 1500 Watts
Frequency Response
30Hz - 2.0kHz
Sensitivity (1W/1m)
99.5dB
Voice Coil Diameter
3" / 76mm
Max. crossover Frequency
1.0kHz
Voice Coil Material Copper
Diaphragm Materia Kevlar Paper Pulp
Surround Material Clth
Mounting Information
Overall Diameter
18.5" / 470mm
Bolt Circle Diameter
17.24" / 438mm
Baffle Cutout Diameter
16.38" / 416mm
No. Of Mounting Holes
8
Mounting Hole Diameter
0.315" / 8mm
Flange Thickess .51" / 16mm
Overall Depth
7.6" / 193mm
Net Weight
10.8 kg. / 23.76 lbs.
Thiele-Small Parameters
Resonant Frequency (fs)
34 Hz
Impedance (Re)
5.5 ohms
Coil Inductance (Le 1.23mH
Mechanical Q (Qms)
8.0
Total Q (Qts)
.34
Compliance Equivalent Vol. (Vas)
228 Liters/8.05cu. ft.
Voice Coil Overhang (Xmax)
4.5mm
Reference Efficiency 3.34%

The main problem is the low Xmax, meaning it's suitable for Cubo 18 Extended with a 300 - 600 W amplifier. Preferably with a high pass around 35 - 45 Hz.