Diy Sub REW Graph

**c3ham** · **09-13-06, 12:59 PM**

hi guys i was just wondering if i would benifit much from buying a BFD here is my in room response from listening position

**brucek** · **09-13-06, 02:06 PM**

It's a bit difficult to interpret because we don't know the crossover you have chosen to use with REW. Is it 90Hz and is this your desired target?

Can you re-post the graph with a vertical axis of 45dB to 105dB and since it drops off so rapidly at 20hz you may as well make your horizontal axis from 20Hz to 200Hz.....

brucek

**c3ham** · **09-13-06, 02:29 PM**

hi brucek my target crossover is 100hz and that is what i have set it to in REW here is a new graph the way you wanted it

**brucek** · **09-13-06, 02:46 PM**

It is quite a good response, but you could help it a lot with a BFD.

If you raised the wholesale level of your sub such that the entire graphed response shifted up about 6dB, then you could cut approximately as I've shown below and have a better response. It's that area between 70-100Hz that would benefit the most.. There's a lot of signal in that area.

Name: diy_sub.jpg
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Name: diy_sub.jpg
Views: 90
Size: 32.4 KB

brucek

**c3ham** · **09-13-06, 02:55 PM**

thanks for the help im a newbie just thought i would build a sub as a wee project

**c3ham** · **09-16-06, 12:15 PM**

hi

Will this http://www.andertons.co.uk/acatalog/...FBQ3102%2ehtml do the same job as the DSP1124P cause no one in the UK seems to have the DSP1124P in stock

thanks

**JohnM** · **09-16-06, 03:09 PM**

That isn't suitable, if you can't find the 1124P go for the FBQ2496 http://www.dolphinmusic.co.uk/page/s...roduct_id/6360

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