1850s cutting off below 50hz |
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chips
Registered User Joined: 26 September 2005 Location: United Kingdom Status: Offline Points: 2 |
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Posted: 26 September 2005 at 9:14pm |
I have noticed the 1850 design does not do much below 50hz, would it
be recomended for me to 'cut off' all lower frequencies? Someone told me playing 20hz would damage the speakers, is this true? |
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Mircea Bartic
Old Croc Joined: 18 February 2005 Location: Romania Status: Offline Points: 2581 |
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yes it is, running 20 Hz in the 1850 will send the speaker straight to speaker heaven
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chips
Registered User Joined: 26 September 2005 Location: United Kingdom Status: Offline Points: 2 |
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So the setting of 50hz is correct too, or is it safe to go any lower? Even though I will be cutting off at 50hz, is it possible to get lower with the 1850 by stacking up 6 or however many? To rephase: What I dont understand is, I was told that you can go lower than 50hz with the 1850 when you stack them, but if I have cut them off at 50hz how the hell can it do that? |
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tendril
Registered User Joined: 22 July 2004 Status: Offline Points: 334 |
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As far as I understand it, the lower end can be extended to 42hz with
stacks of 4 or more. The 50hz cut off is for single cabs only.
Maybe someone more knowlegeable than me will come and explain it better. |
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Tendril
A mistake is a mistake only if one learns nothing from it. |
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minaximal
Old Croc Joined: 26 September 2004 Location: United Kingdom Status: Offline Points: 1780 |
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you can lower the hp filter cutof to match the increased acoustic horn cutoff.. by increasing the stack numbers, the horn sees what looks to be a larger mouth for length ratio and more of a true horn, also minimally increases the theoretical pathlength to assist in loading larger wavelength frequencys.. but there is only so much you can push a 54hz horn and after something like 6-8 you will not got any extra loading lower down the freq range only higher "efficiency" so yes a stack of four may well be pushed to 42hz.. but i'd rather have six to eight unless you dont push them too hard down low |
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roborg
Registered User Joined: 05 July 2004 Location: United Kingdom Status: Offline Points: 1026 |
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you can produce quite alot of low output with only a few 1850's, 40hz can be pretty noticable but don't try to put the hi-pass at 40hz (unless you have a 1000dB/oct filter handy!) & feed it 1.5K per bin! Its far better to put the hi-pass much higher, around 55hz+, 24dB & then you can really crank up the juice without overexcursion, whilst still getting low-extention,
If you're not going to power them with much then a lower hi-pass is fine, do a quick hornresp plot (160cm single exponential, 40l rear chamber to see how the excursion goes up below the horns cut-off)
I've been alot happier with my 1850's since i switched to pretty high x-overs. Not so good for dnb with less than 4 bins i've found. I've tried 4 double 18's x'ed over into 4 1850's at 70hz & that really did what i dreamed the 1850's would do low-down.
cheers,
Rob
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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if you wanna go lower have u considered using subs below???
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