Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Helge A Bentsen]

I bought a bunch of old RCF subs at an auction loaded with L18-P200N drivers.
Boxes are decent enough, but the drivers needs replacement.
Some of them are ok, some of them are blown, there is a mixture of 4/8 ohms and so on.

The box is roughly 200L per driver, two round ports in each chamber with a diameter of 175mm, 300mm long.

Any ideas for a suitable replacement driver?
I have easy access to RCF/B&C, can get my hands on other brands, just a little more shipping costs.

[Ivan Beaver]

I bought a bunch of old RCF subs at an auction loaded with L18-P200N drivers.
Boxes are decent enough, but the drivers needs replacement.
Some of them are ok, some of them are blown, there is a mixture of 4/8 ohms and so on.

The box is roughly 200L per driver, two round ports in each chamber with a diameter of 175mm, 300mm long.

Any ideas for a suitable replacement driver?
I have easy access to RCF/B&C, can get my hands on other brands, just a little more shipping costs.

Have you checked into simply reconing the drivers you have?

[Helge A Bentsen]

Have you checked into simply reconing the drivers you have?

Yes, talked to the distributor without luck, I got the impression these were discontinued from RCF.
I see some advertised online, some look after-market but a couple look like the real deal.
If anyone know of a good kit, I'll consider it. But not to keen on using time & money on reconing without knowing that the kit is good.

[Chris Grimshaw]

Think I'd fire up WinISD or Hornresp and see what's what. The ports are a decent size, so you can probably put something pretty powerful in there without serious port losses. A B&C 18SW115 would be the first thing through my simulator.

Chris

[Helge A Bentsen]

Think I'd fire up WinISD or Hornresp and see what's what. The ports are a decent size, so you can probably put something pretty powerful in there without serious port losses. A B&C 18SW115 would be the first thing through my simulator.

Chris

I did that with B&C and a couple of other manufacturers. 18TBX100 and TBW100 came out pretty good and about similar performance. 18TBW100 has a slight edge. 18SW115 only has a 1 dB advantage, so I'm thinking it might not be worth the extra $$$.
Then again, I could be wrong.

[Helge A Bentsen]

I did that with B&C and a couple of other manufacturers. 18TBX100 and TBW100 came out pretty good and about similar performance. 18TBW100 has a slight edge. 18SW115 only has a 1 dB advantage, so I'm thinking it might not be worth the extra $$$.
Then again, I could be wrong.

Ok, let me modify this slightly.
If i put in the 1500W available (intended amplifier) per driver, 18TBX100 is out of excursion. 18TBW100 is close to the limit, 18SW115 isn't even close.
So, given a bigger amplifier I should be able to extract more performance from 18TBW100 and a lot more form 18SW115?

[Chris Grimshaw]

Ok, let me modify this slightly.
If i put in the 1500W available (intended amplifier) per driver, 18TBX100 is out of excursion. 18TBW100 is close to the limit, 18SW115 isn't even close.
So, given a bigger amplifier I should be able to extract more performance from 18TBW100 and a lot more form 18SW115?

Correct. The 18SW115 is rated for more power, and IIRC also has more excursion. ie, greater output potential. It all amounts to getting more sound out of the same amount of cabinets, but as you've noted, more power input will also be required.
IMO, increasing output density (dB/L) is a Big Deal. Most of my cabinets are optimised in that direction, and I use high-end drivers and plenty of power to get the job done. It means I can pull off some impressive stuff, like a stadium setup with 2x 15" subs and 1x 2x10"+HF per side hitting 85dBC-slow (103dB peak) at 85m.

I don't know how important weight is to you, but going for neodymium drivers will save you a few kg.

Chris

[Helge A Bentsen]

Correct. The 18SW115 is rated for more power, and IIRC also has more excursion. ie, greater output potential. It all amounts to getting more sound out of the same amount of cabinets, but as you've noted, more power input will also be required.
IMO, increasing output density (dB/L) is a Big Deal. Most of my cabinets are optimised in that direction, and I use high-end drivers and plenty of power to get the job done. It means I can pull off some impressive stuff, like a stadium setup with 2x 15" subs and 1x 2x10"+HF per side hitting 85dBC-slow (103dB peak) at 85m.

I don't know how important weight is to you, but going for neodymium drivers will save you a few kg.

Chris

Weigh saving is an issue, not so much on this project. Lost 12kgs per box switching to neo in my KF750.
I'm going to check a few neo drivers and look at what's possible in terms of SPL/$$$ and amp/$$$.

[Helge A Bentsen]

I have 18TLW3000 in some subs already, simulates pretty good in this box. I'd say it matches the 18SW115 pretty good (in this box).
Going to pull out a pair and test it, I didn't think it would fit so I didn't consider it initially.
Having more drivers of the same kind = extra backup.

[Chris Grimshaw]

Sounds like a plan. Keep us updated please.

Chris

[ProSoundWeb Community]