Lbetts818
CarAudio.com Elite
Lbetts818
CarAudio.com Elite
ManufactureObsidian Audio
Motor TypeOverhung
Driver Size18 "
Driver Weight30 lbs
Coil Diameter2.5 "
Coil MaterialCU
Coil Length1.575 "
Gap Height0.3937 "
Manufacture's Xmax20 mm
Geometric Xmax15 mm
Aprox. Price$190 USD
Year2012
TS Parameters (Measured by Data-Bass.com)
Qts0.532
Qes0.67
Qms2.58
Fs28.9 Hz
Res4.1 Ω
Le 1khz5.04 mH
Sd0.1195 m2
Vas151.3 liters
Mms399 grams
Cms76 μm/N
BL21.06 Tm
BL2/Res108.2 N2/W
L/R Time Constant1.23 milliseconds
SplSens89.21 dB
Notes
This driver was provided by Obsidian Audio and is a new model of low cost bang for the buck 18" driver that will be available for the car-audio or home theater market. The driver itself looks to be well built with the familiar black painted 6 spoke cast aluminum frame providing the skeleton and sporting the ubiquitous rubber mounting gasket. The motor is a modest sized ferrite double stack of 1" thick and 7.2" diameter slugs with a modest top plate and a backplate having a small diameter pole vent. There is a vented aluminum spacer ring between the frame and motor which provides venting under the spiders and extra clearance. The voice coil is a 2.5" diameter copper wind of 40mm length on a black anodized aluminum former and is available in either a dual 2 ohm or dual 4 ohm configuration. The cone is a thick paper pulp that is coated. The spider is a stiff, low compliance 7" diameter unit with stitched in leads, while the surround is a rubber material that is double stitched to the cone with the high roll profile. The xmax rating for this driver is 20mm one way with an xmech near 43mm. All of this sounds like the makings of a decent woofer but when the cost of $190 is considered it seems like a great bargain.rnrnTesting of the parameters in free air after some break in resulted in TSP specs that are reasonably close to those provided by Obsidian. Motor force is decent as is sensitivity which should allow this driver to give good performance in reasonable enclosure sizes. This is always a concern with lower cost drivers where the motor is often the first place skimped on and a weak motor is the result which impacts sensitivity and box requirements. That doesn't appear to be the case here.rnrnBreaking in the driver in free-air with a sine wave near resonance to keep input power down, 25Hz in this case, shows that the Obsidian driver is reasonably noise free through the first 25mm peak to peak with some mechanical chatter starting to creep in from 25-40mm peak to peak. At this point there is significant air movement through the motor. The driver was driven a little past 50mm peak to peak at which point it was making a good amount of clatter but otherwise seemed in no danger of bottoming. The driver is rated at 20mm xmax so it should not be surprising that there is increased noise and distortion when driven past this point. The motor did seem to be running out of steam a little, the suspension is rather tight and the driver did not seem to be responding linearly to further increases in power past about 2" peak to peak so it will probably take quite a bit of power to physically bottom the unit which gives it a good rating for ruggedness and safety margin.rn
Copy and pasted in case link is not working. That's for the d2 18 but all I could find.
Motor TypeOverhung
Driver Size18 "
Driver Weight30 lbs
Coil Diameter2.5 "
Coil MaterialCU
Coil Length1.575 "
Gap Height0.3937 "
Manufacture's Xmax20 mm
Geometric Xmax15 mm
Aprox. Price$190 USD
Year2012
TS Parameters (Measured by Data-Bass.com)
Qts0.532
Qes0.67
Qms2.58
Fs28.9 Hz
Res4.1 Ω
Le 1khz5.04 mH
Sd0.1195 m2
Vas151.3 liters
Mms399 grams
Cms76 μm/N
BL21.06 Tm
BL2/Res108.2 N2/W
L/R Time Constant1.23 milliseconds
SplSens89.21 dB
Notes
This driver was provided by Obsidian Audio and is a new model of low cost bang for the buck 18" driver that will be available for the car-audio or home theater market. The driver itself looks to be well built with the familiar black painted 6 spoke cast aluminum frame providing the skeleton and sporting the ubiquitous rubber mounting gasket. The motor is a modest sized ferrite double stack of 1" thick and 7.2" diameter slugs with a modest top plate and a backplate having a small diameter pole vent. There is a vented aluminum spacer ring between the frame and motor which provides venting under the spiders and extra clearance. The voice coil is a 2.5" diameter copper wind of 40mm length on a black anodized aluminum former and is available in either a dual 2 ohm or dual 4 ohm configuration. The cone is a thick paper pulp that is coated. The spider is a stiff, low compliance 7" diameter unit with stitched in leads, while the surround is a rubber material that is double stitched to the cone with the high roll profile. The xmax rating for this driver is 20mm one way with an xmech near 43mm. All of this sounds like the makings of a decent woofer but when the cost of $190 is considered it seems like a great bargain.rnrnTesting of the parameters in free air after some break in resulted in TSP specs that are reasonably close to those provided by Obsidian. Motor force is decent as is sensitivity which should allow this driver to give good performance in reasonable enclosure sizes. This is always a concern with lower cost drivers where the motor is often the first place skimped on and a weak motor is the result which impacts sensitivity and box requirements. That doesn't appear to be the case here.rnrnBreaking in the driver in free-air with a sine wave near resonance to keep input power down, 25Hz in this case, shows that the Obsidian driver is reasonably noise free through the first 25mm peak to peak with some mechanical chatter starting to creep in from 25-40mm peak to peak. At this point there is significant air movement through the motor. The driver was driven a little past 50mm peak to peak at which point it was making a good amount of clatter but otherwise seemed in no danger of bottoming. The driver is rated at 20mm xmax so it should not be surprising that there is increased noise and distortion when driven past this point. The motor did seem to be running out of steam a little, the suspension is rather tight and the driver did not seem to be responding linearly to further increases in power past about 2" peak to peak so it will probably take quite a bit of power to physically bottom the unit which gives it a good rating for ruggedness and safety margin.rn
Copy and pasted in case link is not working. That's for the d2 18 but all I could find.
youdoofus
Skibidi
how in the hell was the username Gir not already taken when you registered?? Invader Zim was super popular around the time that many of the forum members here were kids!! Now im gonna have the doom song stuck in my head for the rest of the day
I had 2 15s in 5.5 cubes tuned to 32 hertz on 2200 watts and they were amazing.
Sent from my SM-N920V using Tapatalk
Sent from my SM-N920V using Tapatalk
THATpurpleKUSH
5,000+ posts
Fuckyou
Obsidian was an online only brand of subwoofers that came to be in 2010 and was started by 2 guys who were big players in the car audio industry. I forget what companies they came from, want to say one was from TC sounds or similar. I vaguely remember one of the founders having experience with the xbl^2 motor structure. Being an online only company there was no middleman so costs were low and the subs sold for about $150-$200. They were rated for about 600-800 watts rms. They were built to be musical and have a stout low end- a well built daily unit. Similar to an early SA-12 but with better sq from low end extension and transient response. Sadly they went out of business in 2015 according to their Facebook page.
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