I got jbl 4645c subwoofer for free. 18" driver pro audio. Well actually got paid 400$ to clean out a storage room which had 2000$ worth of quickly sellable merchandise(this story should top those stupid stories " found 2000$ McIntosh at thrift shop for 10$")
Not sure I want to keep the sub but will there be any issue powering it with spa 500dsp.
Jbl recommends 1200 watt pro audio amp. I don't plan on blasting music loud. Just want to try the thing.
I attached spec sheets. Don't like to blow and damage things.
I appreciate feedbacks
Dayton 500dsp seems to be around 230-260watts at 8ohms. I called Dayton once to find out power rating at 8ohm as they don't provide it. Only 500w at 4ohm
Not sure I want to keep the sub but will there be any issue powering it with spa 500dsp.
Jbl recommends 1200 watt pro audio amp. I don't plan on blasting music loud. Just want to try the thing.
I attached spec sheets. Don't like to blow and damage things.
I appreciate feedbacks
Dayton 500dsp seems to be around 230-260watts at 8ohms. I called Dayton once to find out power rating at 8ohm as they don't provide it. Only 500w at 4ohm
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there's no knowing if you will have enough headroom before clipping for your preferred listening level,bass transients require lots of watts for short duration,but if you don't intend to drive the snot out of it it may work, before committing to purchasing an amp see if you can find an equivalent wattage amp for rent (from a sound contractor or music store) to give yourself a better idea whether a 250 watt amp will fit the bill.
at least getting to hear what it will do and sound like may help you decide to take the plunge on the purchase...
at least getting to hear what it will do and sound like may help you decide to take the plunge on the purchase...
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I already have Dayton 500dsp. So basically trying to avoid to buy more stuff
It's 500w when used with 4ohm drivers with 8ohm it will be less. Around 250
Jbl is 8ohm driver.
I am using Dayton audio 500dsp with an 8ohm velodyne 15" driver now. .
I've heard some pro audio speakers playing at around 800w. Definitely not looking for that sound level
How to tell if there is clipping happening without oscilloscope
Some people powered this jbl subwoofer with vintage 20w per channel marantz units.
It's 500w when used with 4ohm drivers with 8ohm it will be less. Around 250
Jbl is 8ohm driver.
I am using Dayton audio 500dsp with an 8ohm velodyne 15" driver now. .
I've heard some pro audio speakers playing at around 800w. Definitely not looking for that sound level
How to tell if there is clipping happening without oscilloscope
Some people powered this jbl subwoofer with vintage 20w per channel marantz units.
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If you got the amp try it out, you won't hurt the driver even if you were to clip the amp... which probably isn't possible given it has a limiter built-in. Be sure to check the DSP settings to see if the limiter is enabled.
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Spoke with parts express they said there is a limiter circuit that prevents the amp to be over driven. Not exactly a clipping indicator but a circuit that prevents the amp from damaging itself. That's all they said..
I'll give it a shot in few days
I'll give it a shot in few days
Conventionally, an amp driven to square wave levels of clipping produces 2x its unclipped, rated power, assuming no interference from limiters etc and no collapse of the power supply.
That would be 500(ish) Watts in your case.
The 2242 driver in that cabinet can take 650W average for 100 hours continuously, 800W average for 2 hours or an implied 3200W for very short term peaks, though that would assume that power were being applied at frequencies where excursion was well under control.
Basically, your amp isn't big enough to do real damage to the driver.
If you do manage to find a frequency where excursion is not well controlled and dump the entire output of that amp onto it at that frequency, you'll almost certainly hear excessive distortion before being near to damaging it.
Do use the recommended HPF though, as otherwise you might damage the driver with less than full power if you fed it high power content below its tuning frequency.
HTH,
David.
That would be 500(ish) Watts in your case.
The 2242 driver in that cabinet can take 650W average for 100 hours continuously, 800W average for 2 hours or an implied 3200W for very short term peaks, though that would assume that power were being applied at frequencies where excursion was well under control.
Basically, your amp isn't big enough to do real damage to the driver.
If you do manage to find a frequency where excursion is not well controlled and dump the entire output of that amp onto it at that frequency, you'll almost certainly hear excessive distortion before being near to damaging it.
Do use the recommended HPF though, as otherwise you might damage the driver with less than full power if you fed it high power content below its tuning frequency.
HTH,
David.
Thanks for all advices. I generally run 15-18" subwoofer with hpf less than 40-45hz
With sharpest Cross over slope available in settings. I think the numbers available usually are 12 or 24. Sorry not very literate in terminology
But basically I think if the setting is set to 12 the bass reproduced by woofer is like 20-65hz
If set to 24 bass is 20-100hz or so
I powered the sub with spa500 dsp
Spa500 needs higher line lever voltage than what vintage 80 receivers output from pre-out. I usually use headphone output when feeding signal to spa500
Forgot to grab 1/4” to 3.5mm adapter and used preouts.
Volume was set to max on spa500. Hpf was 44hz and using the sharpest Cross over slope
Limiter light came on when playing loud(1130oclock on 40wpc denon receiver ). 2-3 min till I noticed. U think everything ok with the amp? No damage. It plays fine . Was cold to touch even when red limiter light came on
Need to try feeding higher voltage from headphones jack tomorrow
I tested the sub in big warehouse. I don't think I will ever come to these volume levels at home. It's amazing how small plate amp can power this huge subwoofer
With sharpest Cross over slope available in settings. I think the numbers available usually are 12 or 24. Sorry not very literate in terminology
But basically I think if the setting is set to 12 the bass reproduced by woofer is like 20-65hz
If set to 24 bass is 20-100hz or so
I powered the sub with spa500 dsp
Spa500 needs higher line lever voltage than what vintage 80 receivers output from pre-out. I usually use headphone output when feeding signal to spa500
Forgot to grab 1/4” to 3.5mm adapter and used preouts.
Volume was set to max on spa500. Hpf was 44hz and using the sharpest Cross over slope
Limiter light came on when playing loud(1130oclock on 40wpc denon receiver ). 2-3 min till I noticed. U think everything ok with the amp? No damage. It plays fine . Was cold to touch even when red limiter light came on
Need to try feeding higher voltage from headphones jack tomorrow
I tested the sub in big warehouse. I don't think I will ever come to these volume levels at home. It's amazing how small plate amp can power this huge subwoofer
No you didn't hurt anything. The beauty of integrated DSP processing like this is it makes the plate amp virtually bulletproof.. no amount of abuse will cause damage. I do pro sound for a living and in that application I see systems pushed into the limiters for hours on end.. with no damage to anything, amps and speakers get warm or even hot in some cases but everything lives to play another day.
Thanks again. Really appreciate. I can sleep without nightmares about damaged amplifier. Perfect timing