I have 2 TH-18's with 18SW115-4ohm:
HP: 28hz 24db/BW, LP: 80hz 24db/BW
Mains delayed 5.8ms and HP 90hz 24db/BW
As mentioned above having the LP at 80hz smooths the rising response of the TH-18 above 90hz.
What delay do you guys use on your mains, particularly if you LP the TH-18 higher than 80hz?
HP: 28hz 24db/BW, LP: 80hz 24db/BW
Mains delayed 5.8ms and HP 90hz 24db/BW
As mentioned above having the LP at 80hz smooths the rising response of the TH-18 above 90hz.
What delay do you guys use on your mains, particularly if you LP the TH-18 higher than 80hz?
No Its not a Danley TH118 - Similar but DIY construction - add your own flavour to the mix, or blindly build the original plans, as many have.
I did not know how a Danley TH118 was constructed, when I designed the TH-18 and I have still never seen or heard a Danley system. Living as I do in a small town in South Devon England.
Maybe you should read the first few pages of the thread!
Regards Xoc1
I did not know how a Danley TH118 was constructed, when I designed the TH-18 and I have still never seen or heard a Danley system. Living as I do in a small town in South Devon England.
Maybe you should read the first few pages of the thread!
Regards Xoc1
RMS65 this is an English language forum, please post in English or use Google Translate. Your posts have been deleted.Would this driver work in a TH18 Thanks
Phil
LF18N451
Phil
LF18N451
- 4,5 - inch Inside/Outside copper voice coil
- 3000 Watt continuous program power handling
- 97.5 dB Sensitivity
- 30 Hz - 1 kHz Frequency range
- Dual-forced air ventilation for minimum power compression
- Dual spider designed with silicon based damping control
- BL of 30.2 Txm to provide a faster and accurate low frequency
- Nominal Diameter: 460/18 mm/inch
- Rated Impedance: 8 Ω
- Program Power: 3000 W AES
- Power handling capacity: 1500 W AES
- Sensitivity: 97.5 dB
- Frequency Range: 30 Hz ÷ 1000 Hz
- Effective Piston Diameter: 395 / 15.6 mm/inch
- Max Excursion Before Damage (peak to peak): 60/2.36 mm/inch
- Minimum Impedance: 6.3 Ω
- Voice Coil Diameter: 115 / 4.5 mm/inch
- Voice Coil Material: Copper
- Voice Coil Winding Depth: 26 / 1.02 mm/inch
- Number of layers: 2
- Kind of layer: inside / outside
- Top Plate Thickness: 15 / 0.6 mm/inch
- Cone Material: No presed pulp
- Cone Design: Curved
- Surround Material: Polycotton
- Surround Design: Triple roll
- DC resistance: 5.0Ω
- Mechanical factor: 6.0
- Electrical factor: 0.25
- Total factor: 0.24
- BL Factor: 30.2 T · m
- Effective Moving Mass: 235 g
- Equivalent Cas air load: 245 liters
- Effettive piston area: 0.122 m²
- Max. linear excursion (mathematical): 8.8 mm
- Voice - coil inductance @ 1kHz: 2.6 mH
- Half-space efficiency: 2.54%
- Overall Diameter: 465 / 18.3 mm/inch
- Bolt Circle Diameter: 442-447 / 17.4-17.6 mm/inch
- Bolt Hole Diameter: 6.5 / 0.25 mm/inch
- Front Mount Baffle Cut-out: 424/16.7 mm/inch
- Rear Mount Baffle Cut-out: 424 / 16.7 mm/inch
- Depth: 205 / 8.1 mm/inch
- Volume occupied by the driver: 5.5/0.19 liters/ft³
- Net Weight: 10.6 / 23.3 kg/lbs
Looks OK in the Sim Lordsansui has provided.
X max would ideally be bigger but xmech looks generous.
If Hornresp is reporting 520 w into 8 ohm - power will be more into Re and also add in 2db for compression and you are probably looking at 1000w to reach x max.
Some of the RCF drivers seem to sim well in a TH.
I was looking at the RCF LF15X401 15" yesterday looks like a killer driver in the SS15 with a 11.5mm xmax
X max would ideally be bigger but xmech looks generous.
If Hornresp is reporting 520 w into 8 ohm - power will be more into Re and also add in 2db for compression and you are probably looking at 1000w to reach x max.
Some of the RCF drivers seem to sim well in a TH.
I was looking at the RCF LF15X401 15" yesterday looks like a killer driver in the SS15 with a 11.5mm xmax
Guys, I can assure you that the RCF driver you suggested is miles away from what the SW115 drivers are capable of. The xmax at 70% variation of the KMS is about 8 mm and of the BL is at 10 mm. The peak displacement that driver can have without being horrible is 12 mm. The protection value for displacement on the 18sw115 driver is 16.4 mm. Also , the thermal power handling is much lower, even though they specify it almost the same.
Looking at the comparitive prices on Blue Aran (Jam Club) The RCF LF18N451 is available at £259 while the B & C 18SW115 is £400
I would imagine that the RCF might have its place dependent on budget and amplifier power.
That is what interested me with the RCF LF15X401 available at £156 while the 18 inch RCF LF18X401 is £177 and has a 11.5 xmax.
I would imagine that the RCF might have its place dependent on budget and amplifier power.
That is what interested me with the RCF LF15X401 available at £156 while the 18 inch RCF LF18X401 is £177 and has a 11.5 xmax.
