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Filling in the gaps with my Sierra-1 bookshelf speakers - Page 2

post #31 of 36
Thread Starter 
I want to make the little 5.25" woofer to cover from 200hz up to where it crosses over to the tweeter, and then have the new woofer cover from 200hz down to say 70hz or 80hz. I will make my own judgement as to whether or not it improves the sound. With that being said, what I am asking you guys for help on is how to implement this setup.

Does anyone know what the frequency responce is for the little 5.25" woofer in the Sierra-1? What do you guys think would be the optimal crossover to hand off the 5.25" woofer to the JBL 2226j that I will be using? Keep in mind that this will be an active setup. The tweeter will be an RAAL ribbon tweeter, so I will also need to decide on a crossover idea for crossing that over as well.

I realize that there is a possibility that this will wont workout well, but that does not matter. What matters is that I enjoy this and gain some experience and hopefully things will turn out great, but if they do not, then I will use the JBL's in another build sometime down the road, and then go back to the stock Sierra-1's. Its just as simple as that.


Oh and MKtheater, these are the Sierra-1 bookshelf monitors, not the towers.
post #32 of 36
Quote:
Originally Posted by Martycool007 View Post

I will most certainly listen to logic, but I am not of the opinion that 2-ways are better than 3-ways, or vice versa. Everyone has their own opinion and what sounds good to me might not sound good to you.

Sounding good is nonsense, they are to be accurate in reproduction.

SIERRA-1 SPECIFICATIONS... -> Typical In-Room Frequency Response 39Hz - 22kHz ± 3dB
post #33 of 36
Just sell your Sierra and get the the proven towers since you're going to spend the same on amps, dsp, custom boxes, new raal tweets, beta crossover, and then fiddle into the unknown without any guarantee. May as well start from scratch or try one of Eric's kits. Amazingly good with all the midbass you'll ever need.
post #34 of 36
Thread Starter 
Quote:
Originally Posted by datranz View Post

Just sell your Sierra and get the the proven towers since you're going to spend the same on amps, dsp, custom boxes, new raal tweets, beta crossover, and then fiddle into the unknown without any guarantee. May as well start from scratch or try one of Eric's kits. Amazingly good with all the midbass you'll ever need.


That would be the overall better idea, but, that would not be any fun now would it!
post #35 of 36
So you are mating a $20-50 woofer (just a guess based on price of speakers) with a $400 tweeter? Then you want to add a pro bass driver below that?

Datranz is right. This is silly. If you are going to go through the trouble of adding that tweeter and adding a pro woofer, just get a midrange that is of similar quality. You might as well sell the retail speakers as they still have value. Once you modify them they won't be worth more than the parts.

If you were keeping the Ascends stock, adding a pro woofer midbass is not a bad idea. Keep in mind the pro midbass module will have capability well beyond the Ascend (stock or with Raal). The pro driver MBM will be far less compressed and show lower distortion at high levels so it might sound a little odd when you crank it up.

You can basically pick from any good 12" or 15" pro driver. For something like the 2226J I would put it in about 3-5 cu ft tuned to 35-40hz. Give it a bunch of power and use your choice of DSP (MiniDSP or DCX2496 most likely). You will need to take measurements. The 2226J will play nicely up to ~1200hz. Given that your 5" mid will be omnidirectional around there, I would cross where the 2226 is pretty much omni too which would be around 500-700hz.
post #36 of 36
+1 to everything mr. c. just said including the ~500hz crossover point if you really want to give it a try.

your thinking is not unreasonable as a first thought, but the more that you consider it all, the less it will make sense.
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