Hi.
Does anyone have a project for a 2.5KW RMS amplifier. It's for a dual 18 bass bin project, Loaded with Eminence KiloMax 18A.The load inderpedance will be 4Ohms. The speakers will be 2.5KW RMS and 5KW Max. Trying to match the amp & speakers. Don't really have the money to buy a amp of this size.
Thanks
Jake
Does anyone have a project for a 2.5KW RMS amplifier. It's for a dual 18 bass bin project, Loaded with Eminence KiloMax 18A.The load inderpedance will be 4Ohms. The speakers will be 2.5KW RMS and 5KW Max. Trying to match the amp & speakers. Don't really have the money to buy a amp of this size.
Thanks
Jake
hi again
a 2.5 kw amplifier is seriouse . high voltages and high current most definatley not a toy. it would be worth concidering using a seperate amplifier for each driver. I recentley bought an Ecler pam 1000 When bridges it will provide 1000Watts rms into 8 Ohms. i payed £150.00 for it so it is nearly possible to do it on your budget.
regards Ian
a 2.5 kw amplifier is seriouse . high voltages and high current most definatley not a toy. it would be worth concidering using a seperate amplifier for each driver. I recentley bought an Ecler pam 1000 When bridges it will provide 1000Watts rms into 8 Ohms. i payed £150.00 for it so it is nearly possible to do it on your budget.
regards Ian
You'd be lucky to get a new transformer suited to the project for your budget. I'd suggest shopping the market for a decent commercial amp for your needs. An amplifier capable of +/- 140V swing and 35A peak (into a resistive load no less) is not for a beginner. Getting a deal is definately possible, I recently scored an old Yamaha PD2500 bridgable to 1000W RMS into 4Ω for free (right place right time I suppose - these and similar are cheap on eBay) and it only needed to be cleaned up and fully resoldered.
all the ecler required was a new cooling fan as the old one was very very noisey.The ironic thing is i proberbly use no more than 10 watts a channel as my loudspeakers have a sensitivity of 91 db. As for ebay unless you find somthing very local the postage o n a powerfull proffesionall amplifier will be huge . NIce find jason now lets see if you can get a second one for free . now that would be lucky lol.
Regards Ian
Regards Ian
HI,
Thanks for the various inputs. I like the Bi-Amping idea If i was to go with that it would probley be a powered system. Having four of these amps flight cased would take a lot of space up! + The mids amps. There not bad figures. They will probley be tuned down to 35-30Hz. The reason for a 2.5K amp was the match the speaker power, and not try to over load the amp. Will have a look for a 1K amp.
Thanks for the various inputs. I like the Bi-Amping idea If i was to go with that it would probley be a powered system. Having four of these amps flight cased would take a lot of space up! + The mids amps. There not bad figures. They will probley be tuned down to 35-30Hz. The reason for a 2.5K amp was the match the speaker power, and not try to over load the amp. Will have a look for a 1K amp.
If your speakers are rated at 2.5 kW and max of 5 kW then your amp needs to be higher still.
In most applications you don't rate the amps to that of the speakers, the amps need to be higher in capacity.
Reason being is that most speakers are killed by amps which are underpowered, not by amps that have too much power.
This is due to the DC which is created when the amp reaches clipping (saturation) and speakers don't like DC.
I agree with the previous responses - amps of this size are not for the faint-hearted or those with little or no experience.
I have worked in pro-audio and sound engineering for 35 years and I still wouldn't attempt to build an amp of this calibre.
The only project I am aware of is one by Elektor some years ago. I have a copy of it tucked away in my audio files. I'll see if I can locate it, simply for the specs.
In most applications you don't rate the amps to that of the speakers, the amps need to be higher in capacity.
Reason being is that most speakers are killed by amps which are underpowered, not by amps that have too much power.
This is due to the DC which is created when the amp reaches clipping (saturation) and speakers don't like DC.
I agree with the previous responses - amps of this size are not for the faint-hearted or those with little or no experience.
I have worked in pro-audio and sound engineering for 35 years and I still wouldn't attempt to build an amp of this calibre.
The only project I am aware of is one by Elektor some years ago. I have a copy of it tucked away in my audio files. I'll see if I can locate it, simply for the specs.
Hey,
Had a bit of a driver change. The KiloMaxs seemed nice but they eat to much power.......So i think i will go for Presision Devices PD.186 @ 700W RMS it needs half the power. Are there any amp projects for this?? It's become an idea to make them Powerd speakers. Money Saving. Any comments?
Jake
Had a bit of a driver change. The KiloMaxs seemed nice but they eat to much power.......So i think i will go for Presision Devices PD.186 @ 700W RMS it needs half the power. Are there any amp projects for this?? It's become an idea to make them Powerd speakers. Money Saving. Any comments?
Jake
"If your speakers are rated at 2.5 kW and max of 5 kW then your amp needs to be higher still. "
Did you even bother to look at the cone excursion for the driver he wants to use?
It will exceed x-max tuned to 40hz with only 800W, and he wants to tune it to 30hz (which will just make the cone move farther).
"The KiloMaxs seemed nice but they eat to much power."
Look again at the curves I posted, the Eminence is the least efficient at 1.433%, but manages to play louder with the same input power as the driver rated at 3.127%!
The Eminence will hit x-max with only 2/3 of it's rated power, the more efficient driver actually requires more than twice as much power to hit the same excursion!!!!
The Qts of the driver is the issue here, and is why people blindly suggest using 2x the rated power on the driver. In the case of the more efficient driver, it needs it. In the case of the less efficient driver, it does not need it.
You must examine the driver cabinet design before you try and decide how much power to hook up to the driver.
Did you even bother to look at the cone excursion for the driver he wants to use?
It will exceed x-max tuned to 40hz with only 800W, and he wants to tune it to 30hz (which will just make the cone move farther).
"The KiloMaxs seemed nice but they eat to much power."
Look again at the curves I posted, the Eminence is the least efficient at 1.433%, but manages to play louder with the same input power as the driver rated at 3.127%!
The Eminence will hit x-max with only 2/3 of it's rated power, the more efficient driver actually requires more than twice as much power to hit the same excursion!!!!
The Qts of the driver is the issue here, and is why people blindly suggest using 2x the rated power on the driver. In the case of the more efficient driver, it needs it. In the case of the less efficient driver, it does not need it.
You must examine the driver cabinet design before you try and decide how much power to hook up to the driver.
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