Home |
Search |
Today's Posts |
#1
|
|||
|
|||
input sensivity / headroom on amplifier
hi
i've a question about the input sensitivity of the amplifier electrovoice P3000 data sheet EvP3000: www.electrovoice.com/electrovoice/EVfiles.nsf/lookup/P3000/$File/p3000-eds.p df ( ..../p3000-eds.pdf ) input sensitivity=0dbu (0,775 Vrms) maximum input level=+20 dbu (7,75 Vrms) i have two meter before the amplifier input: -Rms Vu meter that display 0dbVU whit a 1 khz sine @ 0 dbu (max display=+3dbVU) -Peak led meter that display 0db whit a 1 khz sine @ 0 dbu (max display=+24db) i work in live (much peak and not much rms), so i wish to put a maximizer/compressor @ L/R, after the maximizer a RMS limiter (set@0 dbu), and after all a peak limiter (set@+19 dbu).... ..... al before the meter (Vu and Peak), so i can keep under control in every time the signal that go to the EvP3000, a signal where the rms don't go up 0dbVu and peak don't go up +19db. what did you think about this? is a correct way to take the full 1200Wrms @4ohm from the Ev3000 without distorsion, or a stupid way to crash all the system? thank's a lot, and excuse my very bad english. marco |
#2
|
|||
|
|||
input sensivity / headroom on amplifier
Marco Gaudesi wrote:
i've a question about the input sensitivity of the amplifier electrovoice P3000 input sensitivity=0dbu (0,775 Vrms) maximum input level=+20 dbu (7,75 Vrms) This appears to mean that with input level control all the way up it will produce rated power with 0.775 mV input signal and that it with the input volume control turned all the way down will require 7.75 volts input signal. i have two meter before the amplifier input: -Rms Vu meter that display 0dbVU whit a 1 khz sine @ 0 dbu (max display=+3dbVU) -Peak led meter that display 0db whit a 1 khz sine @ 0 dbu (max display=+24db) Aha. i work in live (much peak and not much rms), so i wish to put a maximizer/compressor @ L/R, after the maximizer a RMS limiter (set@0 dbu), and after all a peak limiter (set@+19 dbu).... First tell us what music this is about, if you reinforce natural sound, then why change it, why not simply reinforce it? .... al before the meter (Vu and Peak), so i can keep under control in every time the signal that go to the EvP3000, a signal where the rms don't go up 0dbVu and peak don't go up +19db. All that matters in terms of clipping is peak level. Most of what matters in terms of loudspeaker damage is average level. In terms of hearing damage protection: what works best to prevent hearing damage is to turn the volume down to sane levels. what did you think about this? is a correct way to take the full 1200Wrms @4ohm from the Ev3000 without distorsion, or a stupid way to crash all the system? *IF* I understood the specs right above - and I am not sure I did - then you turn the amp all the way down, connect a mixer that conforms to standard audio levels - most do - to the input and rely on the amps own internal limiter to prevent it from clipping and keep the sound well clear of the red range on the meters. But from the description of the constant gain mode one would generally use this amp in that "constant gain mode" and with the input signal suitably matched to prevent clipping. The very point of having so large an amplifier is to avoid running it near clip-level. thank's a lot, and excuse my very bad english. Your english is fine, but your thinking appears to be unclear and the aim, the context, of the amps use is undefined. If you need to use compression or limiting to "get it louder", then you need more sound equipment anyway, because using compression/limiting to make things louder without clipping can, not will but can, depending on circumstances, increase the risk of loudspeaker damage rather than decrease it. Perhaps you could tell us just what the intended use of the amp is? marco Kind regards Peter Larsen -- ************************************************** *********** * \\\\\\\ Quality Ascii handcrafted by Peter Larsen /////// * * \\\\\\\ My site is at: http://www.muyiovatki.dk /////// * ************************************************** *********** |
#3
|
|||
|
|||
input sensivity / headroom on amplifier
Marco Gaudesi wrote:
i've a question about the input sensitivity of the amplifier electrovoice P3000 input sensitivity=0dbu (0,775 Vrms) maximum input level=+20 dbu (7,75 Vrms) This appears to mean that with input level control all the way up it will produce rated power with 0.775 mV input signal and that it with the input volume control turned all the way down will require 7.75 volts input signal. i have two meter before the amplifier input: -Rms Vu meter that display 0dbVU whit a 1 khz sine @ 0 dbu (max display=+3dbVU) -Peak led meter that display 0db whit a 1 khz sine @ 0 dbu (max display=+24db) Aha. i work in live (much peak and not much rms), so i wish to put a maximizer/compressor @ L/R, after the maximizer a RMS limiter (set@0 dbu), and after all a peak limiter (set@+19 dbu).... First tell us what music this is about, if you reinforce natural sound, then why change it, why not simply reinforce it? .... al before the meter (Vu and Peak), so i can keep under control in every time the signal that go to the EvP3000, a signal where the rms don't go up 0dbVu and peak don't go up +19db. All that matters in terms of clipping is peak level. Most of what matters in terms of loudspeaker damage is average level. In terms of hearing damage protection: what works best to prevent hearing damage is to turn the volume down to sane levels. what did you think about this? is a correct way to take the full 1200Wrms @4ohm from the Ev3000 without distorsion, or a stupid way to crash all the system? *IF* I understood the specs right above - and I am not sure I did - then you turn the amp all the way down, connect a mixer that conforms to standard audio levels - most do - to the input and rely on the amps own internal limiter to prevent it from clipping and keep the sound well clear of the red range on the meters. But from the description of the constant gain mode one would generally use this amp in that "constant gain mode" and with the input signal suitably matched to prevent clipping. The very point of having so large an amplifier is to avoid running it near clip-level. thank's a lot, and excuse my very bad english. Your english is fine, but your thinking appears to be unclear and the aim, the context, of the amps use is undefined. If you need to use compression or limiting to "get it louder", then you need more sound equipment anyway, because using compression/limiting to make things louder without clipping can, not will but can, depending on circumstances, increase the risk of loudspeaker damage rather than decrease it. Perhaps you could tell us just what the intended use of the amp is? marco Kind regards Peter Larsen -- ************************************************** *********** * \\\\\\\ Quality Ascii handcrafted by Peter Larsen /////// * * \\\\\\\ My site is at: http://www.muyiovatki.dk /////// * ************************************************** *********** |
#4
|
|||
|
|||
input sensivity / headroom on amplifier
Marco Gaudesi wrote:
i've a question about the input sensitivity of the amplifier electrovoice P3000 input sensitivity=0dbu (0,775 Vrms) maximum input level=+20 dbu (7,75 Vrms) This appears to mean that with input level control all the way up it will produce rated power with 0.775 mV input signal and that it with the input volume control turned all the way down will require 7.75 volts input signal. i have two meter before the amplifier input: -Rms Vu meter that display 0dbVU whit a 1 khz sine @ 0 dbu (max display=+3dbVU) -Peak led meter that display 0db whit a 1 khz sine @ 0 dbu (max display=+24db) Aha. i work in live (much peak and not much rms), so i wish to put a maximizer/compressor @ L/R, after the maximizer a RMS limiter (set@0 dbu), and after all a peak limiter (set@+19 dbu).... First tell us what music this is about, if you reinforce natural sound, then why change it, why not simply reinforce it? .... al before the meter (Vu and Peak), so i can keep under control in every time the signal that go to the EvP3000, a signal where the rms don't go up 0dbVu and peak don't go up +19db. All that matters in terms of clipping is peak level. Most of what matters in terms of loudspeaker damage is average level. In terms of hearing damage protection: what works best to prevent hearing damage is to turn the volume down to sane levels. what did you think about this? is a correct way to take the full 1200Wrms @4ohm from the Ev3000 without distorsion, or a stupid way to crash all the system? *IF* I understood the specs right above - and I am not sure I did - then you turn the amp all the way down, connect a mixer that conforms to standard audio levels - most do - to the input and rely on the amps own internal limiter to prevent it from clipping and keep the sound well clear of the red range on the meters. But from the description of the constant gain mode one would generally use this amp in that "constant gain mode" and with the input signal suitably matched to prevent clipping. The very point of having so large an amplifier is to avoid running it near clip-level. thank's a lot, and excuse my very bad english. Your english is fine, but your thinking appears to be unclear and the aim, the context, of the amps use is undefined. If you need to use compression or limiting to "get it louder", then you need more sound equipment anyway, because using compression/limiting to make things louder without clipping can, not will but can, depending on circumstances, increase the risk of loudspeaker damage rather than decrease it. Perhaps you could tell us just what the intended use of the amp is? marco Kind regards Peter Larsen -- ************************************************** *********** * \\\\\\\ Quality Ascii handcrafted by Peter Larsen /////// * * \\\\\\\ My site is at: http://www.muyiovatki.dk /////// * ************************************************** *********** |
#5
|
|||
|
|||
input sensivity / headroom on amplifier
hi i've a question about the input sensitivity of the amplifier electrovoice P3000 data sheet EvP3000: www.electrovoice.com/electrovoice/EVfiles.nsf/lookup/P3000/$File/p3000-eds.p df ( ..../p3000-eds.pdf ) input sensitivity=0dbu (0,775 Vrms) maximum input level=+20 dbu (7,75 Vrms) i have two meter before the amplifier input: -Rms Vu meter that display 0dbVU whit a 1 khz sine @ 0 dbu (max display=+3dbVU) -Peak led meter that display 0db whit a 1 khz sine @ 0 dbu (max display=+24db) i work in live (much peak and not much rms), so i wish to put a maximizer/compressor @ L/R, after the maximizer a RMS limiter (set@0 dbu), and after all a peak limiter (set@+19 dbu).... .... al before the meter (Vu and Peak), so i can keep under control in every time the signal that go to the EvP3000, a signal where the rms don't go up 0dbVu and peak don't go up +19db. what did you think about this? is a correct way to take the full 1200Wrms @4ohm from the Ev3000 without distorsion, or a stupid way to crash all the system? thank's a lot, and excuse my very bad english. marco I was unable to access the page, but this is what your specifications mean. The amplifier is capable of putting out its rated power with a 0.775 volt signal (0dBu) You will need to turn down the input attenuation on the of the power amp if the rest of your system is capable of putting out +19dBu Very Important!!! This does not adjust the power of the amplifier, only the amount of voltage necessary to drive the amplifier to full output The amplifier should be set so that every component in your system clips at the same time. In other words, when your preamp input clips, the channel should clip, the output from your board should clip and the power amp should hit clipping. Now put in your limiter just before the power amp and set it so that it kicks in just before the power amp clips, preventing the power amp from clipping. Turn down input gain on the board just a little bit the board a little bit and you will be just fine. If you are looking for more RMS output, set the RMS compressor closer to the value of the peak limiter. Try +6dbu instead of 0dBu. and make up the gain reduction from the compresssor with the output level of the compressor. Richard H. Kuschel "I canna change the law of physics."-----Scotty |
#6
|
|||
|
|||
input sensivity / headroom on amplifier
hi i've a question about the input sensitivity of the amplifier electrovoice P3000 data sheet EvP3000: www.electrovoice.com/electrovoice/EVfiles.nsf/lookup/P3000/$File/p3000-eds.p df ( ..../p3000-eds.pdf ) input sensitivity=0dbu (0,775 Vrms) maximum input level=+20 dbu (7,75 Vrms) i have two meter before the amplifier input: -Rms Vu meter that display 0dbVU whit a 1 khz sine @ 0 dbu (max display=+3dbVU) -Peak led meter that display 0db whit a 1 khz sine @ 0 dbu (max display=+24db) i work in live (much peak and not much rms), so i wish to put a maximizer/compressor @ L/R, after the maximizer a RMS limiter (set@0 dbu), and after all a peak limiter (set@+19 dbu).... .... al before the meter (Vu and Peak), so i can keep under control in every time the signal that go to the EvP3000, a signal where the rms don't go up 0dbVu and peak don't go up +19db. what did you think about this? is a correct way to take the full 1200Wrms @4ohm from the Ev3000 without distorsion, or a stupid way to crash all the system? thank's a lot, and excuse my very bad english. marco I was unable to access the page, but this is what your specifications mean. The amplifier is capable of putting out its rated power with a 0.775 volt signal (0dBu) You will need to turn down the input attenuation on the of the power amp if the rest of your system is capable of putting out +19dBu Very Important!!! This does not adjust the power of the amplifier, only the amount of voltage necessary to drive the amplifier to full output The amplifier should be set so that every component in your system clips at the same time. In other words, when your preamp input clips, the channel should clip, the output from your board should clip and the power amp should hit clipping. Now put in your limiter just before the power amp and set it so that it kicks in just before the power amp clips, preventing the power amp from clipping. Turn down input gain on the board just a little bit the board a little bit and you will be just fine. If you are looking for more RMS output, set the RMS compressor closer to the value of the peak limiter. Try +6dbu instead of 0dBu. and make up the gain reduction from the compresssor with the output level of the compressor. Richard H. Kuschel "I canna change the law of physics."-----Scotty |
#7
|
|||
|
|||
input sensivity / headroom on amplifier
hi i've a question about the input sensitivity of the amplifier electrovoice P3000 data sheet EvP3000: www.electrovoice.com/electrovoice/EVfiles.nsf/lookup/P3000/$File/p3000-eds.p df ( ..../p3000-eds.pdf ) input sensitivity=0dbu (0,775 Vrms) maximum input level=+20 dbu (7,75 Vrms) i have two meter before the amplifier input: -Rms Vu meter that display 0dbVU whit a 1 khz sine @ 0 dbu (max display=+3dbVU) -Peak led meter that display 0db whit a 1 khz sine @ 0 dbu (max display=+24db) i work in live (much peak and not much rms), so i wish to put a maximizer/compressor @ L/R, after the maximizer a RMS limiter (set@0 dbu), and after all a peak limiter (set@+19 dbu).... .... al before the meter (Vu and Peak), so i can keep under control in every time the signal that go to the EvP3000, a signal where the rms don't go up 0dbVu and peak don't go up +19db. what did you think about this? is a correct way to take the full 1200Wrms @4ohm from the Ev3000 without distorsion, or a stupid way to crash all the system? thank's a lot, and excuse my very bad english. marco I was unable to access the page, but this is what your specifications mean. The amplifier is capable of putting out its rated power with a 0.775 volt signal (0dBu) You will need to turn down the input attenuation on the of the power amp if the rest of your system is capable of putting out +19dBu Very Important!!! This does not adjust the power of the amplifier, only the amount of voltage necessary to drive the amplifier to full output The amplifier should be set so that every component in your system clips at the same time. In other words, when your preamp input clips, the channel should clip, the output from your board should clip and the power amp should hit clipping. Now put in your limiter just before the power amp and set it so that it kicks in just before the power amp clips, preventing the power amp from clipping. Turn down input gain on the board just a little bit the board a little bit and you will be just fine. If you are looking for more RMS output, set the RMS compressor closer to the value of the peak limiter. Try +6dbu instead of 0dBu. and make up the gain reduction from the compresssor with the output level of the compressor. Richard H. Kuschel "I canna change the law of physics."-----Scotty |
Reply |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
rec.audio.car FAQ (Part 2/5) | Car Audio | |||
rec.audio.car FAQ (Part 1/5) | Car Audio | |||
FS: SOUNDSTREAM CLOSEOUTS AND MORE!! | Car Audio | |||
What is a Distressor ? | Pro Audio | |||
Passive Volume Control (Passive Preamp) Info | High End Audio |