Speakerplans.com Homepage
Forum Home Forum Home > General > Electro Frying Forum
  New Posts New Posts RSS Feed - 18 Sound 18LW2600
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

18 Sound 18LW2600

 Post Reply Post Reply
Author
Message
AndyWave View Drop Down
Registered User
Registered User
Avatar

Joined: 30 March 2008
Location: Finland
Status: Offline
Points: 380
Post Options Post Options   Thanks (0) Thanks(0)   Quote AndyWave Quote  Post ReplyReply Direct Link To This Post Topic: 18 Sound 18LW2600
    Posted: 25 August 2021 at 5:18pm
Have any of You had any experience of said drivers?

These seem to have good funds/fun ratio, with almost 15mm Xmax, Fs 31Hz, Qts 0,3 etc

I'm about to build 4pcs of BR singles to go for smaller gigs instead of my huge tapped horns. Intended usage 30-130Hz with huge venturi vent of 1/2Sd....

Asks Andy, the impatient little builder
torturing electrons since ......
Back to Top
levyte357- View Drop Down
Old Croc
Old Croc
Avatar

Joined: 27 July 2012
Location: UK, South East
Status: Offline
Points: 8128
Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2021 at 1:14pm
This is an updated version of the 18lw2500, pretty much designed for Scoops.

I would suggest 18lw2420 if need driver for reflex, and must be 18sound.

But you need box optimised for driver.

B&C 18TBX100 or Fane Prime XS, maybe less fussy, in dropping in existing boxes.

Original PD186MK1, drops in Gsub or B&C bcsub18 design, no problem and rocks.
Global Depopulation - Alive and Killing.
Back to Top
AndyWave View Drop Down
Registered User
Registered User
Avatar

Joined: 30 March 2008
Location: Finland
Status: Offline
Points: 380
Post Options Post Options   Thanks (0) Thanks(0)   Quote AndyWave Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2021 at 2:32pm
Not to walk over Your huge experince, but 18sound datasheet suggests them as bass reflex only.

I even sent them an e-mail and asked about other types of suitable enclosures, but no response yet.... 
torturing electrons since ......
Back to Top
levyte357- View Drop Down
Old Croc
Old Croc
Avatar

Joined: 27 July 2012
Location: UK, South East
Status: Offline
Points: 8128
Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2021 at 3:17pm
Try comparing the T/S Parms between the 18LW2500/18LW2600.

BL 》 30, definitely does not say vented cab to me.

Maybe use Winisd to model/Compare above drivers against 18TBX100, PD186MK1, FANE PRIME  XS in  200L enclosure.

Was an 18sound distributor who told me18LW2500 was optimised for Scoops, and 18LW2600 is newer version.

And people I know, said 18LW2500 Had weak cone. 
Global Depopulation - Alive and Killing.
Back to Top
toastyghost View Drop Down
The 10,000 Points Club
The 10,000 Points Club
Avatar

Joined: 09 January 2007
Location: Manchester
Status: Offline
Points: 10920
Post Options Post Options   Thanks (0) Thanks(0)   Quote toastyghost Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2021 at 3:41pm
Counterpoint: almost every recent high Bl driver in manufacturer inventories was developed for high output reflex cabinet purposes. The kind with a large, simulated and flared port.

Check out Don Keele’s (public) papers on true efficiency as to why that may be.

The 18sound page for the 18LW2600 even states explicitly that it’s optimised for reflex cabinets.
Back to Top
levyte357- View Drop Down
Old Croc
Old Croc
Avatar

Joined: 27 July 2012
Location: UK, South East
Status: Offline
Points: 8128
Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2021 at 4:08pm
Originally posted by toastyghost toastyghost wrote:

Counterpoint: almost every recent high Bl driver in manufacturer inventories was developed for high output reflex cabinet purposes. The kind with a large, simulated and flared port.

Check out Don Keele’s (public) papers on true efficiency as to why that may be.

The 18sound page for the 18LW2600 even states explicitly that it’s optimised for reflex cabinets.


There is a further back story to this, about why the 18LW2500, in terms of T/S Parms, bears more than slight resemblance to PD1851/PD1852/Turbomax Redeye 18, all top of the line Scoop drivers, but I will not mention it here..LOL

The 18LW2600 is the successor to the 18LW2500, and I guess a driver would sell more, if it is marketed as a reflex/vented driver.


Global Depopulation - Alive and Killing.
Back to Top
Contour View Drop Down
Young Croc
Young Croc


Joined: 03 March 2004
Status: Offline
Points: 620
Post Options Post Options   Thanks (0) Thanks(0)   Quote Contour Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2021 at 6:57pm
Ik always like those double magnet woofers, they seem to offer more true x-max. 
Back to Top
AndyWave View Drop Down
Registered User
Registered User
Avatar

Joined: 30 March 2008
Location: Finland
Status: Offline
Points: 380
Post Options Post Options   Thanks (0) Thanks(0)   Quote AndyWave Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2021 at 7:50pm
Thanks Toasty and Levyte.

This Keele paper was quite interestind read.

https://www.xlrtechs.com/dbkeele.com/PDF/Keele%20(2003-10%20AES%20Preprint)%20-%20Nom%20vs%20True%20Eff%20High%20BL.pdf

The flared port part is another matter, but with such large air quantities moved, which is possible by modern high xmax drivers, a neccessity to keep the box tuning stabile, and box efficiency on the high side at high SPL. Was it some JBL white paper about this?

This all is what this forum should be all about, dispersing knoledge.Clap

Last night I sketched a 215Lnet BR cab with venturi port with start and end area of 1200cm2 and the middle constricted section of 600cm2, with paper and pencil of course. Ended up quite big box for single 18"

There was next problem, how to model the thing? After all I modeled it in hornresponse as backloaded horn with 215L throat chamber and converging-straight-diverging horn section as reflex tube. Maybe Akabak is next in line. The Keele paper gave answer to my wonderings about lowish and bumpy low end sensitivity. Probably I sholdn't be afraid to eq the hell out of it.LOL



There may be need to add a resonator to the reflex tube to kill the 176Hz peak.....and the straight section after the rear volume is in fact a 90degree turn inside the cabinet....

Seems to be sawdust time after my vacation is over. Sadly one cab eats more than two sheets of 4'by8' 18mm ply.

-Andy
torturing electrons since ......
Back to Top
MarjanM View Drop Down
Old Croc
Old Croc
Avatar

Joined: 10 February 2005
Location: Macedonia
Status: Offline
Points: 7810
Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2021 at 10:23pm
2500 had issues. So it was discontinued only few years after release.
Not sure what was fixed at the 2600 but it sure models very very good in a reflex box.
2500 was also positioned very badly in the price point. It was more expensive then the TLW3000.
Now that is fixed too.
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
AndyWave View Drop Down
Registered User
Registered User
Avatar

Joined: 30 March 2008
Location: Finland
Status: Offline
Points: 380
Post Options Post Options   Thanks (0) Thanks(0)   Quote AndyWave Quote  Post ReplyReply Direct Link To This Post Posted: 14 April 2023 at 6:18am


Got some suitable empty cabinets (ex jbl 2245) to try my 18LW2600's, instead of building them with insane ply prices.

Vb 420L for two, tuned to 31Hz, tubes 4x 160mm. Quick 'n dirty processing needed +4dB shelf from 43Hz downwards and one notch at 140Hz, 24dB HP 24Hz & LP 110Hz

Got them to first gig also, unfortunately at civilized volume corporate rock 'n roll event.... I'm very pleased with the results. I can only imagine 'em at war volume in apropriate venturi port cabinet, bangin proper techno and ambient

Cheers, Andy


Edited by AndyWave - 14 April 2023 at 6:55am
torturing electrons since ......
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.172 seconds.