Soundigital tests continued
09-04-2008, 12:33 AM
#61
Guest
Posts: n/a
That will be one of the first tests. The reason is we already know the difrence between 1000.1 and the 500.1 so why not test against another strong amp that people are having good results with so thats why the first test will be against a z1a. p.s the 1000.1 is a true 12v amp.
09-04-2008, 03:16 AM
#62
50 Watt CAFz'r
Join Date: Mar 2008
Posts: 57
Ok, after reading this whole post I got to say that some of your guys are brutal. It's hard enough to get people to share their test results so just appreciate it for what it is. The 16v test was a good test and these SD amps put out some good power and with a couple improvements could potentially be a very competitive amp.
As for the 12v test it was good but one factor that could come into play is the two 12's weren't meant to handle that much power. And if to many burps where done on them at 3k+ that could have very much effected the comparison score from the first amp to the second amp. Woofers like that won't have the suspension to handle a lot of burps at that much power and they will loosen up quite a bit and that will greatly effect the score. But if it was one burp for one amp then swap the one burp on other amp it would be pretty fair. But that is unlikely since you'd need to do test burps to find the right volume and frequency for each amp. All I'm saying is the 12v test needs to be re-looked at with subs that can handle the power. Because based on power test the spl number should have been same if not a couple tenths louder.
Another thing about testing power at 12v on single battery with big power amps is look at what the meters hold at peak volt/amps then burp again and watch in real time to see if the amp holds the peak volt/amps or just spike and fall off quickly to a lower number. Peak number can be deceiving on some amps and not relate to the spl score. That may be a possibility as to why you where not seeing the spl reflected in the extra power. If the 7kd held it's power vs the SD spiked and fell off to lower power that would also explain the lower spl. And this could be a possibility of same spl but more power in your 16v test too. We learned this the hard way about a year ago.
None the less nice job guys and thanks for sharing.
As for the 12v test it was good but one factor that could come into play is the two 12's weren't meant to handle that much power. And if to many burps where done on them at 3k+ that could have very much effected the comparison score from the first amp to the second amp. Woofers like that won't have the suspension to handle a lot of burps at that much power and they will loosen up quite a bit and that will greatly effect the score. But if it was one burp for one amp then swap the one burp on other amp it would be pretty fair. But that is unlikely since you'd need to do test burps to find the right volume and frequency for each amp. All I'm saying is the 12v test needs to be re-looked at with subs that can handle the power. Because based on power test the spl number should have been same if not a couple tenths louder.
Another thing about testing power at 12v on single battery with big power amps is look at what the meters hold at peak volt/amps then burp again and watch in real time to see if the amp holds the peak volt/amps or just spike and fall off quickly to a lower number. Peak number can be deceiving on some amps and not relate to the spl score. That may be a possibility as to why you where not seeing the spl reflected in the extra power. If the 7kd held it's power vs the SD spiked and fell off to lower power that would also explain the lower spl. And this could be a possibility of same spl but more power in your 16v test too. We learned this the hard way about a year ago.
None the less nice job guys and thanks for sharing.
Last edited by dtbrown; 09-04-2008 at 03:19 AM.
09-04-2008, 08:21 AM
#63
im having a hard time understanding why a amp would have such a feature, please explain for me? especially a spl amp? so if the amp is in economy mode it makes less power correct? from what i seen the light was always strong except for after the amp protected. but back to the economy mode is its relation directly to power aka wattage, or is it how loud the amp is? i dont know how like you said with clean power you dont get the spl. but this new economy feature sounds pretty new to me and i think we all need a better understanding of it and how it works. and as of when i posted my previous post i have yet to see anyone explain how these tests were bunk.
This is an amplifier, not just a SPL amplifier. It has this feature to provide energy saving from the battery bank. After 60 seconds it enters in Economy Mode, and it automatically shutdowns the EM after you rise the volume.
09-04-2008, 08:25 AM
#64
well after using this thing for daily driving for over aweek straight and at 0.5 ohm I'm very impressed. My class AB amps get hotter than this thing does. And with each day it gets louder I really don't why but it does... usually it gets less. But Need to get my 16 volt batts installed and retest. I think this amp is gonna hard to beat once the bugs are worked out of it. Who else makes an amp that can make power and more power with higher source voltage with out internal changes?? It seems to love the 0.5 ohm may have to go lower. But will defenatly need to do something with power input... And doesn't smell anymore maybe the crx took the smell out of it hehe..
A thing that seems to be released to a second plane here is the size.
I would dare any company to do a smaller amp with the power that SD8000 delivers.
09-04-2008, 08:30 AM
#65
Ok, after reading this whole post I got to say that some of your guys are brutal. It's hard enough to get people to share their test results so just appreciate it for what it is. The 16v test was a good test and these SD amps put out some good power and with a couple improvements could potentially be a very competitive amp.
As for the 12v test it was good but one factor that could come into play is the two 12's weren't meant to handle that much power. And if to many burps where done on them at 3k+ that could have very much effected the comparison score from the first amp to the second amp. Woofers like that won't have the suspension to handle a lot of burps at that much power and they will loosen up quite a bit and that will greatly effect the score. But if it was one burp for one amp then swap the one burp on other amp it would be pretty fair. But that is unlikely since you'd need to do test burps to find the right volume and frequency for each amp. All I'm saying is the 12v test needs to be re-looked at with subs that can handle the power. Because based on power test the spl number should have been same if not a couple tenths louder.
Another thing about testing power at 12v on single battery with big power amps is look at what the meters hold at peak volt/amps then burp again and watch in real time to see if the amp holds the peak volt/amps or just spike and fall off quickly to a lower number. Peak number can be deceiving on some amps and not relate to the spl score. That may be a possibility as to why you where not seeing the spl reflected in the extra power. If the 7kd held it's power vs the SD spiked and fell off to lower power that would also explain the lower spl. And this could be a possibility of same spl but more power in your 16v test too. We learned this the hard way about a year ago.
None the less nice job guys and thanks for sharing.
As for the 12v test it was good but one factor that could come into play is the two 12's weren't meant to handle that much power. And if to many burps where done on them at 3k+ that could have very much effected the comparison score from the first amp to the second amp. Woofers like that won't have the suspension to handle a lot of burps at that much power and they will loosen up quite a bit and that will greatly effect the score. But if it was one burp for one amp then swap the one burp on other amp it would be pretty fair. But that is unlikely since you'd need to do test burps to find the right volume and frequency for each amp. All I'm saying is the 12v test needs to be re-looked at with subs that can handle the power. Because based on power test the spl number should have been same if not a couple tenths louder.
Another thing about testing power at 12v on single battery with big power amps is look at what the meters hold at peak volt/amps then burp again and watch in real time to see if the amp holds the peak volt/amps or just spike and fall off quickly to a lower number. Peak number can be deceiving on some amps and not relate to the spl score. That may be a possibility as to why you where not seeing the spl reflected in the extra power. If the 7kd held it's power vs the SD spiked and fell off to lower power that would also explain the lower spl. And this could be a possibility of same spl but more power in your 16v test too. We learned this the hard way about a year ago.
None the less nice job guys and thanks for sharing.
09-04-2008, 08:54 AM
#66
1000 Watt CAFz'r
Join Date: Aug 2000
Posts: 1,113
Ok, after reading this whole post I got to say that some of your guys are brutal. It's hard enough to get people to share their test results so just appreciate it for what it is. The 16v test was a good test and these SD amps put out some good power and with a couple improvements could potentially be a very competitive amp.
As for the 12v test it was good but one factor that could come into play is the two 12's weren't meant to handle that much power. And if to many burps where done on them at 3k+ that could have very much effected the comparison score from the first amp to the second amp. Woofers like that won't have the suspension to handle a lot of burps at that much power and they will loosen up quite a bit and that will greatly effect the score. But if it was one burp for one amp then swap the one burp on other amp it would be pretty fair. But that is unlikely since you'd need to do test burps to find the right volume and frequency for each amp. All I'm saying is the 12v test needs to be re-looked at with subs that can handle the power. Because based on power test the spl number should have been same if not a couple tenths louder.
Another thing about testing power at 12v on single battery with big power amps is look at what the meters hold at peak volt/amps then burp again and watch in real time to see if the amp holds the peak volt/amps or just spike and fall off quickly to a lower number. Peak number can be deceiving on some amps and not relate to the spl score. That may be a possibility as to why you where not seeing the spl reflected in the extra power. If the 7kd held it's power vs the SD spiked and fell off to lower power that would also explain the lower spl. And this could be a possibility of same spl but more power in your 16v test too. We learned this the hard way about a year ago.
None the less nice job guys and thanks for sharing.
As for the 12v test it was good but one factor that could come into play is the two 12's weren't meant to handle that much power. And if to many burps where done on them at 3k+ that could have very much effected the comparison score from the first amp to the second amp. Woofers like that won't have the suspension to handle a lot of burps at that much power and they will loosen up quite a bit and that will greatly effect the score. But if it was one burp for one amp then swap the one burp on other amp it would be pretty fair. But that is unlikely since you'd need to do test burps to find the right volume and frequency for each amp. All I'm saying is the 12v test needs to be re-looked at with subs that can handle the power. Because based on power test the spl number should have been same if not a couple tenths louder.
Another thing about testing power at 12v on single battery with big power amps is look at what the meters hold at peak volt/amps then burp again and watch in real time to see if the amp holds the peak volt/amps or just spike and fall off quickly to a lower number. Peak number can be deceiving on some amps and not relate to the spl score. That may be a possibility as to why you where not seeing the spl reflected in the extra power. If the 7kd held it's power vs the SD spiked and fell off to lower power that would also explain the lower spl. And this could be a possibility of same spl but more power in your 16v test too. We learned this the hard way about a year ago.
None the less nice job guys and thanks for sharing.
Yes thank you dtbrown, I would post my 12 volt results but I didn't have enough time to test it. I did however do testing at 18 volt which was quite easy. The results speak for themselves.
muriloalvares, you are correct in saying this amp has the most power for the size. I for one will be following the development of the future amps. Get those things listed done to the amp and lets test it again when you get to Canada.
09-04-2008, 09:11 AM
#67
Nice don.
I fact we have in development 2 new amplifiers.
The WEAKER delivers a litle more power than 2x SD8000 and is about 70cm long.
EDIT: 70cm means 27,55 inches, sorry.
I fact we have in development 2 new amplifiers.
The WEAKER delivers a litle more power than 2x SD8000 and is about 70cm long.
EDIT: 70cm means 27,55 inches, sorry.
Last edited by Soundigital; 09-04-2008 at 09:15 AM.
