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post #1 of 4 Old Yesterday, 07:33 PM - Thread Starter
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How would I connect a sub ?

Bottom line is:
Hi.. and thanks in advance

I have a vintage audio 2 channel stereo system. I have preamp/amplifier separates.
I have a nice Boston Acoustics "passive subwoofer" that once belonged to my upstairs Home theater.
How could I use this passive sub on the vintage stereo system?
I realize an amplifier would be necessary. But on the sub, there is no crossover only one red/black input jacks.

What type crossover arrangement would i need to tap on stereo to a mono sub?

Am I making sense??
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post #2 of 4 Old Today, 05:22 AM
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You need one of these between the preamp and the sub amp/mains amp:
http://www.sweetwater.com/c445--PA_Crossovers

Bill Fitzmaurice Loudspeaker Design

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post #3 of 4 Old Today, 05:31 AM
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The Passive sub works like a regular speaker, so those red and black jacks are on the + and - inputs. You connect your subwoofers amplifiers outputs to those inouts, Post photos/model just to be sure

You would need a standalone subwoofer amplifier or a subwoofer plate amplifier (check partsexpress.com)

Crossover and sub volume functions would be found on the subwoofer amplifier.

Connecting the subwoofer plate amp to your pre-power amp

You can split the pre-amp (using a Y-jack) and send one set to power amp and second set to the subwoofer amplifier.

Or

If the subwoofer plate amp has speaker level inputs, you can connect the subwoofer plate amp via SPEAKER level inputs, connect one pair of speaker wires from power amp to the sub amp's speaker level inputs.
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post #4 of 4 Old Today, 07:18 AM - Thread Starter
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Quote:
Originally Posted by qguy View Post
The Passive sub works like a regular speaker, so those red and black jacks are on the + and - inputs. You connect your subwoofers amplifiers outputs to those inouts, Post photos/model just to be sure

You would need a standalone subwoofer amplifier or a subwoofer plate amplifier (check partsexpress.com)

Crossover and sub volume functions would be found on the subwoofer amplifier.

Connecting the subwoofer plate amp to your pre-power amp

You can split the pre-amp (using a Y-jack) and send one set to power amp and second set to the subwoofer amplifier.

Or

If the subwoofer plate amp has speaker level inputs, you can connect the subwoofer plate amp via SPEAKER level inputs, connect one pair of speaker wires from power amp to the sub amp's speaker level inputs.
That's the ticket ..


THANKS
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