我衰咗我隻十仔終於拍邊

chhanthony

回復  chhanthony


    I think...IF use Onkyo Amp ..Set the Vol to 85db.(sub set 0)
..All subwoofer ...
toysonline 發表於 2010-12-14 13:30

ic...咁要睇下佢個sound level係唔係加得太多而令個AMP輸出嘅能量太強而令sub-woofer拍邊。
我覺得反而同係唔係85dB無乜關係

鐵心心

你隻輕D,不抬你果隻比我試 .
HP2210 發表於 2010-12-14 13:42

你黎拎

chhanthony

我覺得我而加感受到你以前感受嘢 !!!
HP2210 發表於 2010-12-14 13:31

乜嘢?

chhanthony

其它CHANNEL 全SET 80db , 大5個db唔係好多.
唔係段段拍,係依兩段先拍
HP2210 發表於 2010-12-14 13:36

see this
http://chhanthony.pixnet.net/blog/post/34817130

source from http://www.svsound.com/questions-faqs-rscomp.cfm

other discussion in AVS


Maybe you already know how powerful a tool a simple Radio Shack Sound Pressure Meter is. If you use some of the popular test disks out there to check your room response there are some things you need to know about the meter. Some of these disks, like the popular "Autosound 2000 Bass CD #101", have sweeps or even chapter stops that show how even (or not) the response of your system is down low, below 20Hz even.

The problem? The Radio Shack sound meter is not totally "linear" in its accuracy down there. All such meters are off by the same amount depending on the frequency however, which is good news! So that while its sensitivity below 20Hz is not what it is at 50Hz, there is a simple way to compensate for this deficiency. It's called a compensation chart. Using one is very simple, and a pencil and paper is all you need.

Simply look to the below frequencies and add the required decibels (dBs) at the frequency in question. So if your system seems to be measuring 70dBs with a 20Hz tone, then really it's putting out 77.5dBs. This is a VERY substantial difference, roughly TWICE the acoustical energy, requiring many times the amplifier to achieve. You can see then how critical the below chart is if you are using an equalizer to even out room response of your bass. Maybe you are not bothered by any such variances, but if you are desirous of getting the most from your system it's something well worth investigating. Adding a simple equalizer like the ART 351 or the more complex and powerful Rane PE17 allow you the flexibility to affect your system response in the low bass regions easily.

NOTE: Using sine waves at high SPLs can easily damage any subwoofer given their extreme stress on woofer voice coils.  Use only a few seconds for any given tone during measurements, allow a minute or so in between frequencies, and keep actual SPL's low, in the 75-85dB range.  Contact SVS if you have questions about room response measurements or proper use of sine waves in this process.

So find out what your subwoofer(s) are REALLY doing, and add the following numbers as appropriate to your SPL meter readings:

At 10Hz add 20dBs to the meter's readings and at ...

12Hz add 16.5dB
16Hz add 11.5dB
20Hz add 7.5dB
25Hz add 5dB
31.5Hz add 3dB
40Hz add 2.5dB
50Hz add 1.5dB
63Hz add 1.5dB
80Hz add 1.5dB
100Hz add 2dB
125Hz add .5dB

http://www.audioxpress.com/magsdirx/ax/addenda/media/koya2811.pdf



Subwoofer One" MS Excel worksheet

http://www.audioc.com/library1/testcd/freqnewwith.xls
   

josephlok

直上MK250 不過相信作用不大都解決唔到十仔終於拍邊

狐滴hp2210

乜嘢?
chhanthony 發表於 2010-12-14 13:44

隻1250,我想問你記唔記得你以前係部906 SET 幾多db ?

thank

chhanthony

隻1250,我想問你記唔記得你以前係部906 SET 幾多db ?

thank
HP2210 發表於 2010-12-14 13:53

80dB同其他channel一樣

狐滴hp2210

直上MK250 不過相信作用不大都解決唔到十仔終於拍邊
josephlok 發表於 2010-12-14 13:51

師兄點解咁講 ?

狐滴hp2210

see this
chhanthony 發表於 2010-12-14 13:50

Thank you , but 好深.
研究,研究

benny888

我onkyo 608 + kx12 沒拍邊

(衰比一D突然好急速潛得好深同大聲既低頻) buy sunfire 玩dual sub