Need help with setup

[Racinglife12]

Hello

Recently I have bought a pair of JBL T125 speakers. They came with a SoundTech PL602 amp which is really nice!! I am going to buy a mixer for it in a while. But I have seen that the speakers only go from 50hz-16Khz. So I wanted to add my 2 old subs to my old amp. They dont have low pass filters and 1 of the woofers is 4 ohms. Is it possible to mount a 8ohm low pass filter to the 4ohm sub???? And where could I find a low pass filter for around 100hz. I have a budget of 40 euros per filter. Or does anyone have seen 2 8 ohm subs for under 100 euros with filters?

Thanks

 

[americanaudiophile]

If you add a passive crossover to your sub you will probably get excessive bass below 100hz and no way to adjust the relative level of the sub to your speakers. If you had small speakers with little or no bass under 100z you might get away with it but with more full range speakers like your JBLs you would want a separate subwoofer amp with adjustable crossover and level control.
http/www.parts-express.com/dayton-audio-sa100-100w-subwoofer-plate-amplifier--300-802
If you have to go passive I would suggest a crossover frequency of about 50 to 60 hz. If you use a crossover rated for an 8 ohm speaker it will change the level of the sub and the load placed on your amp.

 

[gondo]

You should get a good stereo sound form that setup. Especially if plugged to your computer audio compared to cheap computer speakers. I assume it will be used for computer since it's posted here.

I can see the desire for a mixer just to get the volume control and to add multiple inputs (guitar, computer, mp3, tv, etc....) I never saw a mixer with a low frequency output. One way to do this would be to have dual outputs on the mixer. 1 for the Soundtech amp for the JBLs. The other going to the subs. I assume the amps are not powered since they don't have built in filters. My guess would be your using some automotive audio there. I'd open the subs and add a filter direct. It will be expensive since it will have to be a power filter capable of handling the load of the amp. Putting a filter before the external sub amp would mean line level and a cheaper filter. However it would have to an external filter.

So how do we solve this. Maybe there is a mixer available with a low frequency output. You can do eq setting on an output or aux output. I think the easiest solution is to buy a powered sub with built in amp and line level input/low pass filter built in. Looks like you're on a tight budget. Trade your 2 subs for it. And why do you need 2 subs?