we used a berry ultracurve instead of controller work very well , the amps sound good any chance of giving us the brand

regards

How much was the USB amp ??

Hi

can you get them anytime?

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i have the data sheets now, many thanks to all. 

very well - seemless integration between the ls and si bins - only a very small room, and totally over the top, but i did sound really sweet - pissed off the club as it sounded 10 times better than their main room!

Ive yet to use the ls subs in a big room - in my experience low subs need a bit pf space to breath to work properly and can sound a bit strangled in small rooms, so if they sound good in a small room, im keen to hear what they can do in a more open enviroment

its a deal HBL, im interested to see if we can do a kind of infrahorn for these. im back from hols soon, so we can finally have a look at these subs

Mike - when using with the si2000, the ls2000 only run 28 - 55hz, and when used with the smaller msi system, they run from 28 - 75Hz. i think that both sides of the bandpass have been tuned quite close together to help overall sensitivity and output.

perhaps the power handling - using the td controller i safely put 1600w rms into each 15" driver ( modified rcf l15 p200ak 4 ohm), so am using 3.2k per bin. they are efficient as well - most people assume they are 4th order bandpass horns but they are longer horns with compression plates infront of the drivers, and a reflexed rear chamber which adds significant output to the lower area of frequency output. they are a very musical and articulate bin which when used in pairs go supprisingly low and are very punchy - excellent transient attack.

the only problem i have with this rig is it phisically looks too small for a lot of people - i frequently get comments asking where the rest of the rig is.......untill i turn it on!

sorry to keep you all waiting for plans - im just too busy with work at the mo. i keep thinking that the next week will be quieter, but its not panning out.

I have decided that i want to build another 4 ls2000's so plans will definately have to be made.

im away with work at the mo - should be back in 10 days, so hows about i run one over when i get back ? high time i got on with this....

picking up some lab 4000's tomorrow to run these, should be interesting!

really for pc line cabs you need a 99 card, but this was designed for the ls1500 only.

nice cabs the pc115's. ive got some pc115w floor monitors and there lovely. would love some more...

i have 2 ls td controllers, one with a 55 card for use with si2000 or ts2400, and one with a 75 card for use with msi. I think you chose which card you requred when ordering.

as i have both si2000 and msi-v cabs i use both controllers.

you might like to contact Melpomen in Nantes who may just have come cards lurking around. Ask for Tierry Tranchant.

if you ever decide to sell your ls2000 or pc line cabs please let me know - i love the older Nexo kit, and enjoy traveling over to france as often as possible!

it might be worth a go - i purchased quite a lot of nexo kit from Melpomen a couple of months ago, including some ls2000 units. good luck!

ps - how do you find the ls2000 - i find it a very unusual subwoofer. very accurate, sounds strange when you are used to other units which are warm and fuzzy in comparison to the ls2000.

ive only owned mine a short while so am keen to hear other users opinions.

thanks for that Marcello, the bottom diagram is how i stack mine.

the drivers in the ls2000 look like rcf l18p 200 units, 4 ohm coil. do you know if that is correct - this will be usefull if roecones are required in the future.

ive now got enough Lab gruppens to power the rig properly - im going to be using : 

Lab 2000c for si2000 mid / high ( 1 channel per 2 bins, 2 0hms load)

Lab 2000c for si2000 bass ( 1 channel per bin, 2 ohms load)

Lab 4000 for ls2000 sub ( 1 channel per bin, 2 ohms load)

i think this will work well, all the power being delivered to the cabs will be in like with what nexo recommend.

i already use Lab 1600 amps to drive my msi-v cabs and they sound great, and are just reaching 0dB when the nexo td controller limiters are comming in on excursion, so i think they are a good match.

I agree on the sound quality Marcello, i was tempted to buy a newer Alpha system last year, but after comparison with the si2000, i stuck with the si2000 - maybe the 2x1 inch top section is sweeter then the 3 inch of the alpha.

that is interesting regarding the 15 inch woofer in the si2000. mine are all original, but one has been reconed with a l15-200ak kit, which looks the same other than the lack of doping on the cone.

reconing depends on the kit - most single suspention drivers ( single spider) are easy enough providing that you are paitent and gentle, and have lots of acetone available for removing the old kit, and the correct range of glues ( i use evostik impact glue and slow set 2 part epoxy)

twin spider kits and certain others come with either the coil seperate, or the cone seperate to the coil / spider assembly. these are naturally more tricky, and take a bit more time and skill.

ive been talking to HBL and am hoping to get a ls2000 and si2000 bin down to him this week and plans shall flow shortly !

so, some internal pics of the ls2000. the first pic is a si2000 bin with the side off. work has started on making some plans for these with the aim of getting some additional cabs made by cnc.

Marcello - on one note that may interest you, i have had some concern that the drivers in my subs have seen better days - all the coils and cones are fine, no scrapes / rips etc, but the suspention feels too loose.

this afternoon i reconed one of the drivers with an rcf l18 p200-4 recone kit and the new cone feels much better and stiffer as you would expect from a pa driver.

it might be worth checking your drivers to see if they are gettong loose. mine were last reconed 9 years ago, with original parts. i should imagine the re-coned drivers will sound much better.

Good session Chris... really learnt alot!  thanks for your time.

the drivers on the ls2000 do face different directions, but one is wired out of phase so both cones go in the same direction at the same time. i would imagine this is done to reduce distortion.

im going to order the rest of the recone kits on monday ( another 7) - expensive, but the difference is remarkable. even though the td controller prevents over excursion and temperature damage to the drivers i think this enclosure is quite demanding on the drivers, so 9 or 10 years is goung to make them fairly tired.

HBL - its going to be interesting to try these with 1850's, but im still not convinced. we will also need to check that the driver which sits with its magnet into the rear chamber fits here as there is not a lot of available depth and the rcf is quite a shallow driver.

2 weeks to go, and ive got the whole system going out together - 4 si2000 mid high packs, 4 si2000 bass bins, 4 ls2000 subs amd 4 nexo msi-v full range infills, all powered from lab gruppen. im looking forward to hearing that!

on the wood thickness - i think it will be very difficult to build exact replicas of these if we start altering pannel thickness. we will end up with the choice of having different external dims or different internal volumes

the change of internal volumes may not be of much consequence if you are not planning to use rcf l18-p200's, but im definately sticking to the rcfs

by the way, ive got a si2000 rig going out on hire in luton this afternoon - probably approx 4.30 - fancy hearing it properly this afternoon ? ill have soundweb and a pc there as well, so you can have a play with that. i think you will be very supprised what you can do with this rig without the subs... 

thanks for those plots Marcello, any info on this system is interesting.

The si2000 does run well without subs- the subs are nice to have, but as you say for techno etc it is fine without. after all, the si system was designed to run on its own, the ls2000 was introduced later to suppliment the si2000 but mostly the ts2400 system.

have you ever seen or heard a ts2400 system - i have seen some internal photos and to me it looks like the very last evolution of the si system, using a similar bass horn, the same mid horn and the same treble horn but with a 2 inch rather than 2 off 1 inch drivers, all in the same cab. i would be interested to hear this someday, but i think i prefer the format of having 2 cabs.

it was good to have a couple of forum members come over yesterday to hear the system when it was being set up. I think it supprised them what such a small system was capable off. even with just 1 stack a side ( 1 bass, 1 mid high) the bass was remarkably deep.