Miguel Castro Rios wrote on Sun, 08 August 2010 06:43 |
Thanks for your time...
Yes I will stick to Eighteen Sound...
Just a few more questions...
First. As far as sound, how does the 18" super scooper compare to the 21" inch Super scooper...
Second. We normally use the LW1400 and we put about 2400 Watts for every two boxes. About 1200 Watts per speaker.
If I use 18Sound and either build a 21 inch super Scooper or still use the 18 inch super scoopers that we have, but instead, use the 18NLW9600. Wich can take 3600 Watts Program rating... Will the output (spl and frequency) be increased to the amount of cash being invested? (I mean from one driver to the other) ...
Eighteen Sound will be. Thank you...
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Nice.
You are the first person I have ever heard ask a serious question in regards to scoops.
The 21-inch Scoop will offer a lower frequency response at a higher dB rating than the 18-inch Scoop. Bear in mind, there are a few things you need to take into consideration upon building this design.
The 21-inch Scoop is not popular based on its weight. Using the Precision Devices PD 2150, it weighed around 100 – 150 kg pending on how much bracing was involved. The weight will be lighter using the Eighteen Sound due to not offering a ceramic magnet.
Since maximum output will not be attained due to not having the required amplifier power, you can use 1200 watts as the guideline. It is a more realistic view on what to expect instead of calculating the maximum output the driver will offer at the manufactures rating despite, not having enough amplification to reach there.
You have a +0.52 dB in favour of the 21 NLW 9600 over the 18 LW 1400 from a 2.83-volt perspective using no enclosure.
Comparing the 18 LW 1400 to the 18 NLW 9600 yields a 1 dB gain in favour of the 18 LW 1400 over the 18 NLW 9600.
At 1200 watts long-term, the 18 LW 1400 will more than likely be in power compression so, there will be a 3 dB (or higher) loss in SPL.
At 1200 watts long-term, the 21 NLW 9600 will more than likely not face any power compression due to receiving less power than the advertised wattage figure.
At 1200 watts long-term, the 18 NLW 9600 will more than likely not face any power compression due to receiving less power than the advertised wattage figure.
Of course, with the amount of cabinets being used, the chances of any of the drivers facing power compression will be lower than someone trying to squeeze ever bit of SPL using 2 – 4 bass bins.
What you should expect is more output from 50 Hertz downwards from the 21-inch Scoop oppose the 18-inch version and, no compression (hence more output) using the 18 NLW 9600. The difference will be noticeable conducting a test using four 18-inch Scoops versus four 21-inch Scoops. If the comparison is lopsided, the cabinets with the most bins will offer a lower response or in the case of the 18 NLW 9600, more output with the same frequency response.
No one will be able to tell you if such an investment is beneficial. Only you can answer that question.
Best Regards,