BM mkIII black edition (not available)

[Electrodynamic]

I built up a BM mkIII with a few tweaks.

First up is the flat black basket. There are also no vent screens on the back. Instead of a single Nomex 10" spider there are two polycotton 10" spiders. The terminals also accept 8 gauge instead of the regular 10 gauge terminals. Motor mounts are silver instead of black as well.

This driver is not going to be a production driver. It will handle more power than the standard mkIII and hopefully be significantly louder as well. It won't have as flat of a frequency response, or sound as good, but it's more "SPL" focused. I'll post up tomorrow how it performs once it's ready to be put in a box and thrashed on.

Here is one teaser pic of it drying:



You can see the neo motor inside the basket in this pic:


Here are T/S parameters:
Re = 6.4283 ohms
Fs = 22.5498 Hz
Qes = 0.5942
Qms = 10.1638
Qts = 0.5614
Le = 3.8236 mH (at 1 kHz)
Diam = 234.9500 mm ( 9.2500 in )
Sd =43355.1595 mm^2( 67.2006 in^2)
Vas = 45.6967 L ( 1.6138 ft^3)
BL = 21.1231 N/A
Mms = 291.0825 g
Cms = 171.1350 uM/N
Sensitivity= 81.2015 dB @1W/1m
Sensitivity= 82.1515 dB @2.83Vrms/1m

[cjj2d]

now that is freakin sweet!!!!!

sure would like my hands on that sucker.

[pinktaco]

Originally Posted by Electrodynamic

I built up a BM mkIII with a few tweaks.

First up is the flat black basket. There are also no vent screens on the back. Instead of a single Nomex 10" spider there are two polycotton 10" spiders. The terminals also accept 8 gauge instead of the regular 10 gauge terminals. Motor mounts are silver instead of black as well.

This driver is not going to be a production driver. It will handle more power than the standard mkIII and hopefully be significantly louder as well. It won't have as flat of a frequency response, or sound as good, but it's more "SPL" focused. I'll post up tomorrow how it performs once it's ready to be put in a box and thrashed on.

Here is one teaser pic of it drying:



You can see the neo motor inside the basket in this pic:


Here are T/S parameters:
Re = 6.4283 ohms
Fs = 22.5498 Hz
Qes = 0.5942
Qms = 10.1638
Qts = 0.5614
Le = 3.8236 mH (at 1 kHz)
Diam = 234.9500 mm ( 9.2500 in )
Sd =43355.1595 mm^2( 67.2006 in^2)
Vas = 45.6967 L ( 1.6138 ft^3)
BL = 21.1231 N/A
Mms = 291.0825 g
Cms = 171.1350 uM/N
Sensitivity= 81.2015 dB @1W/1m
Sensitivity= 82.1515 dB @2.83Vrms/1m

explain the T/S parameters to me and what good/bad