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PostPosted: 18 Jun 2019, 21:51 
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Joined: 18 Jun 2019, 20:57
Posts: 4
Hi, I ordered a Dayton Audio PA385S-8 15" Pro Subwoofer 8 Ohm from Parts Express to replace my 30 Year Old passive DAK DBX DB-SW15 down firing subwoofer speaker. Here is where I find I don't know very much about speakers. When I opened the new speaker, to my horror, I saw it is a Single Voice Coil speaker and my old speaker is a Dual Voice Coil speaker.

I have a Pioneer VSX-D811S Receiver that is rated for 100W per channel and it says "Use speakers with a nominal impedance of 8 Ω to 16 Ω". I can hook up the surround back speakers right + and left - to a subwoofer speaker +/- input so it looks like it would work with a SVC speaker and I can set the crossover at the receiver (100, 150, 200HZ). My receiver also has a subwoofer preout for a powered subwoofer.

I Googled, which is how I came across this site, but could not find any info on this. Does anyone know how I can make this SVC Subwoofer speaker work here? Since the receiver has a crossover for the Sub, can I just connect the +/- directly to the speaker or do I need something else to make it work? Maybe this speaker won't do well in this box. I measured inside 16.5x16.5x19.75 for 3.11 ft/3 not counting the speaker displacement.

I am trying to avoid sending it back as shipping is expensive.
Thanks
John


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PostPosted: 19 Jun 2019, 17:58 
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Joined: 23 Feb 2017, 02:02
Posts: 555
the orignal one has sensitvity of average 90.5db you need speaker with same spec 90-91dB otherwise may sound weird, volume is not flat response your one is 93db
https://www.usaudiomart.com/details/649 ... s/1797701/

Replacement one with duall coils may have 4 ohm per coil, put the one in series then you get 8ohms and then you just plug in as you would place the old speaker


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PostPosted: 19 Jun 2019, 20:32 
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Joined: 18 Jun 2019, 20:57
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Thanks for the reply. I did measure each side on the old speaker and they were giving me 5.6 ohms each. What I am asking is if I can bypass the subwoofer's crossover and using the crossover in the receiver, connect the new speaker directly or do I need a new crossover to put in the box for the new speaker. Basically I want to use the subwoofer box with the new speaker which has a single voice coil and I am not concern with the old crossover and terminals. The extent of my building speaker knowledge is putting a TV speaker in a cigar box some 40 years ago and when I Googled, I got a lot of info but not what I need for this.


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PostPosted: 20 Jun 2019, 14:27 
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Joined: 04 Jun 2008, 20:59
Posts: 4033
Location: Arizona, USA
Hi, Often you can do what you want as many receivers already sum the two channels and provide the necessary crossover. I would give it a try. You should not need to use the craoosover that is internal to the sub. The amp should do the job for you. The one case that won't work is if the amp has a "line" level output to the sub and is expecting to see what is called a powered sub. That is one with a built in amplifier.

Good listening
Bruce

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PostPosted: 21 Jun 2019, 23:51 
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Joined: 18 Jun 2019, 20:57
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Great. I ordered some banana binding posts so I can hook it up and hope to test it by end of weekend.
Thanks
John


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PostPosted: 28 Jun 2019, 19:36 
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Joined: 18 Jun 2019, 20:57
Posts: 4
The subwoofer is working just fine. I got my bass back and it is better than before. Maybe I'll get an external subwoofer amp in the near future.
Thanks for the input.
John


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