Adding subwoofer to desktop ACS340

Take a signal from them, filter out the higher frequencies, and amplify it to suitable for the subW.

Well, the line input is in the subW, from which it normally goes to the L&R speakers. The amp is really in the subW, only the controls are normally in the L&R speakers (well one of them).

With a schematic, I might be able to do some surgery :-)

RichK

Hmm.. you probably mean that signal is normally fed there from L&R spkrs?

Then, I think that u just need to feed line signal to the input :-) I don't think that you really need any other controls than volume in the subw, since it plays only sub-low-range.

The master volume control is on the right speaker, along with the power switch (on the back), a LED power indicator and the bass and treble controls. The left speaker is just that, a speaker.

I have the two small ACS340 speakers, but not the subwoofer if the OP needs them.

I have two other Altec Lansing subwoofer models, but I don't know if the small ACS340 speakers can be used with the ACS 295 or ACS 250 sub woofers.

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I'd guess these are similar to my ASC 45's and my ACS 45.1's with the input on the sub and the volume control on the sattelite speakers, but yours having an analog control instead of digital (knob instead of push buttons)... I'm not sure how the handled that but the 45's and the 45.1's have a simple pinout only using 5 wires. It is a type of din connector that looks simiar to a ps-2 mouse or keyboard connector.

If your connector is a 5 pin connector I believe this should be the proper wiring for it. ~~| |~~

2 / * _ * \ 3 1 \ * |_| * / 4 \ * / 5 ~~~~~ GND pin 1 speaker R pin 2 speaker L pin 3 speaker DOWN volume bottom pin 4 speaker UP volume bottom pin 5 LED Green

- Mike

Hi Mike,

Thanks for posting the pinouts for the 45's. The ACS340 has a 9-pin connector. Functions include on-off, vol, base, trbl, LED.

I was able to find the schematic of the power amp chip, but not for the whole system. Altec Lansing does not provide it.

Having a pintout for ACS340, such as you have given would allow me to "hardwire" the bas/trbl to a fixed value add a switch for power (maybe pot for vol)

Regards,

RichK

----- Original Message ----- From: "Michael Kennedy" Newsgroups: sci.electronics.repair Sent: Monday, June 12, 2006 10:07 PM Subject: Re: Adding subwoofer to desktop ACS340

input

that

E-mailed you direct, but no answer so far. You have a block on your Earthlink address.

RichK

I allowed it through, but I can't read it on this computer. I check the suspect folder every day, but i have a different account set up on this computer. I'll reply tommorow morning.

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