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Passive subwoofer too loud.

Hi,

I have two front speakers rated at 4 ohms and a subwoofer made by the same designer (unknown specs) that should go well with his fronts, but... the subwoofer is laughably loud.

 

The designer recently passed away so I cannot get any support. I am using the same amps to drive the fronts and the subwoofer so it should not be an amp gain issue.

The subwoofer has two 12 inch drivers. Each driver has its own inputs for speaker cable. So I am running one channel of my stereo amp (again sub has its own amp - same kind of amp as fronts) to one woofer on the sub and the other channel to the other woofer on the sub. Is that the issue ? Or,  I am wondering if the sub was internally wired in series when it should have been wired in parallel or vice versa? - Just trying to understand why it is so damned loud when the same guy designed it and knew that the amplifier that I would be using with it is a typical amp - no volume control.

I am so aggravated... hope someone can help.

brjoon1021
mlsstl
1,436 posts
 

The gain/input sensitivity of amps can vary quite a bit. Could be the separate amp you are using for the sub simply has more gain than the amp being used for the speakers.  

As noted earlier in this thread, the Schiit SYS is a $49 passive preamp that you could use to adjust the volume of the sub. Simply put it inline in between the sub amp's input and the source output. 

Also, remember that subwoofers are extremely sensitive to their placement in a room.  Too close to corners or a wall/floor boundary can increase their loudness, particularly at certain frequencies.  You might try moving the sub further away from a corner or wall placement and see if that helps. And this particular experiment is completely free!  

bi0drainx
34 posts
 

Can always use a minidsp and measure and EQ

brjoon1021 OP
4 posts
 

Do you guys know how to connect a Receiver to an amplifier so that the Receiver can be the amplifier for the subwoofer ? That would give me volume control and a remote.

I would still have the main speakers running from my other amp and preamp.

I thought that if I ran interconnects from the line out of the preamp to the tape input of the reciver, then connect the Receiver to the subwoofer with speaker cables that I would be good.  Did not work. The Receiver is so complicated so I do not know if my idea was faulty or if the Receiver was not set up right .

mesch
3,481 posts
 

If it were me I would purchase the SChiit SYS or a Nobsound variable attenuator for ~$50 and place it between preamp and sub amp.  Save thr receiver for a better purpose.

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