#16
|
|||
|
|||
Quote:
I don't think you can look at the comparison in that way (by hyperthetically adding 80% increase in power to the formula) I think you have to take it for what ir IS. Max SPL of 121 dB - Max SPL of 129 dB Also there is always a falloff in the lower frequencies with every speaker. The K8 claims it goes down to 66Hz at -6dB. Would it not be safe to say that this speaker will cover the low frequencies of an acoustic guitar? (What does the BagAmp claim?)
__________________
BoB/335 http://soundcloud.com/acousticskyline http://soundcloud.com/mile-stone http://soundcloud.com/bob-335 |
#17
|
|||
|
|||
Quote:
That said it's VERY difficult to compare output specs and MUCH more importantly compare sonic impact between Digital Class D amps and Analog A or A/B designs. Comparing specs between two like and similar products, say for instance, a Crest Class A Power Amp and an Ashley Class A Power Amp has some (albeit limited) sonic value. Comparing the specs of a new design Class D Digital switching Amp to that of Analog Amp is a road to madness. Absolutely sonically meaningless. |
#18
|
|||
|
|||
Very good points Mr. Hanna. That whole apples and bananas thing.
__________________
YUP.... Emerald: X-20, Center hole X-10 (Maple) and X-7 (redwood), Spalted Chen Chen X 10 level 3, CA: Early OX and Cargo McPherson: Early Kevin Michael Proto Some wood things by Epi, Harmony, Takamine, Good Time, PRS, Slick, Gypsy Music, keyboards, wind controllers.. etc |
#19
|
|||
|
|||
Quote:
I am NOT saying that a powered speaker with more power will sound better than a different speaker with less power. There are design and component values in the equation.
__________________
BoB/335 http://soundcloud.com/acousticskyline http://soundcloud.com/mile-stone http://soundcloud.com/bob-335 |
#20
|
|||
|
|||
The first thing that comes to mind here is I'd hate to be the poor guy standing in front of a two-way 8'' speaker system at 129dB.
I not sure what ANYONE could get out of this spec especially if they're were attempting to apply this to anything that happens in the real world of club playing. I had a boss once that could scream at me at 129dB. There were NO redeeming sonic benefits from that talent. |
#21
|
|||
|
|||
Quote:
Expecting that equation to hold up when comparing (under designed analog) or Digital Power Amps with well built Analog Power Amps is pointless. I'm willing to put my money in a 300 watt Crest Power Amp any day, all day, endlessly before I'd EVER entertain some of the cheap, light weight 1000 watt Digital Amps. |
#22
|
|||
|
|||
Quote:
FWIW, I was only comparing the QSC to the JBL amp -- precisely because they are similar (both class D digital amps, same size, and used for roughly the same purpose). In addition, Max SPL ratings are taken at 1 meter's distance and there is a volume dropoff depending upon where the speaker is placed (and no, I wouldn't want to be standing 3 feet away from 129 dB -- or 121 for that matter). geokie8
__________________
2000 Taylor 615 1982 Taylor 515 2009 Gibson SJ-200 20th Anniversary |
#23
|
|||
|
|||
Quote:
To my knowledge, there are no specs on the BagAmp; however, representatives have stated that it goes down to 60 Hz (in a personal email to me and posted on AGF elsewhere). Irrespective of the veracity of the statement, I really think the BagAmp's response for an acoustic guitar would be fine -- and buy into the statement that keyboard players and bass players probably need to add the sub.
__________________
2000 Taylor 615 1982 Taylor 515 2009 Gibson SJ-200 20th Anniversary Last edited by geokie8; 01-02-2010 at 11:12 AM. |
#24
|
|||
|
|||
Quote:
Which is why, I'd assume, that my three-year old Mackie SRM450 active Monitors, with more conventional but heavier power amps: a Class G, Parametric Servo Feedback for low frequency, and Conventional Class AB for high frequency is probably more reliable under varying operating conditions than the new Class D power-amp-Based Mackie SRM450V2. The older SRM450 is 10 lbs. heavier than the newer SRM450V2. Also, the older SRM450 speakers have a conventional magnet in their low-frequency speaker but the new SRM450V2 low-frequency speakers are neodymium-magnet equipped. Maybe some of that extra weight is worth it for the greater reliability of the SRM450 power amps? What do you think? Thanks. Regards, SpruceTop
__________________
Martin HD-28 Sunburst/Trance M-VT Phantom Martin D-18/UltraTonic Adamas I 2087GT-8 Ovation Custom Legend LX Guild F-212XL STD Huss & Dalton TD-R Taylor 717e Taylor 618e Taylor 614ce Larrivee D-50M/HiFi Larrivee D-40R Blue Grass Special/HiFi Larrivee D-40R Sunburst Larrivee C-03R TE/Trance M-VT Phantom RainSong BI-DR1000N2 Emerald X20 Yamaha FGX5 Republic Duolian/Schatten NR-2 |
#25
|
|||
|
|||
Quote:
I know many who are willing to concede to that because the ability to tote them around with relative ease outweighs the lack of sonic response in their world. I'm good with that as long as we don't start confusing what the specs mean in the real world. I'm not sure about reliability comparisons. The Digital Amps may well be very reliable. I do know that the market demands the QSC's and The Mackie's and the JBL's be light and powerful. That's what research says you and I want. That said ya just simply can not have light and powerful and concert level cleanliness and tone in one package. Somethings gotta give. You're NOT gonna see Pink Floyd tour with Digital Power Amps and neodymium loaded turbo packs and for good reason |
#26
|
|||
|
|||
What he said.
geokie8
__________________
2000 Taylor 615 1982 Taylor 515 2009 Gibson SJ-200 20th Anniversary |
#27
|
|||
|
|||
Quote:
geokie8
__________________
2000 Taylor 615 1982 Taylor 515 2009 Gibson SJ-200 20th Anniversary |
#28
|
|||
|
|||
Quote:
I still need to compare the K10 to the Bag Amp myself. I compared the BA to the SA and the BA was way better sounding to my ears but I didn't feel it had enough output. If the SQ of the K10 is somewhere in between the SA and BA, I might go for the K10 because of the additional headroom and versatility it will provide me (can use it as a PA, monitor, etc.), plus its not that much heavier than the SA. GL |
#29
|
|||
|
|||
The QSC amplifiers are, I think, analog designs. The letter designation in, Class D, does not stand for digital. I'm reasonably certain that the only true digital power amplifier is the MX-D1 made by Yamaha which costs around $5,000. (It delivers 500 watts per/ch with a distortion rating of 0.003% at 1kHz.)
Using the max SPL speaker specifications of the QSC K series and JBL EON to draw inferences is problematic. One would need to know whether limiters are being used and their characteristics and, and of course, how the max SPL is measured, etc. I have the impression that JBL is more conservative with their specifications than QSC. Last edited by Herb Hunter; 01-02-2010 at 12:22 PM. |
#30
|
|||
|
|||
Quote:
|