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mahont03
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Last seen: 6 months 3 weeks ago
Joined: Feb 4 2014 - 11:00am
Need for subwoofer/s in 2ch set up??

Ok, newbie here so be kind. I have read a few different threads about the idea of augmenting mains with a sub (or 2 in stereo) and just want a more educated/experienced view on whether it would be worth it. Obviously I am using this set up for music only.

Current gear consists of a Cambridge audio 851C (CD/DAC/Digital preamp) and a Vincent Audio SP-331MK (150w per channel @ 8ohms). At some stage I will get a separate preamp but only recently purchased the other gear and havnt got around to it yet. They are driving a pair of DIY speakers (3-way) consisting of SEAS drivers:

Woofer = W26FX001 (10inch magnesium cone)

Mid = W15CH001 (5.5inch magnesium cone)

Tweeter = Seas "Millenium" (1inch soft dome)

The speakers are based on a kit design I received from SEAS (with x-overs all preassembled) and according to the specs the low end should get down to around 30Hz (-3dB) however I don't think it actually does get quite that low (probably isn't far off from listening so far - but I don't have equipment to actually measure it properly) seeing as I'm sure I havnt done as good of a job as a master cabinet maker could have! Also the room they are being used in is quite open to other rooms which probably doesn't help the bass response...

Anyway, given this information, for accurate and overall good music reproduction would it be wise to opt for stereo subs (something like SVS SB2000?) or is it just not worth it??

Bill B
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Joined: Jul 28 2012 - 1:59pm
Yes sub

In my main system I have large "full range" speakers, specified down to 32 Hz -3dB, and the best improvement I ever made to the system was adding a subwoofer. Go for it. (I use one sub, so can't speak for the relative difference that a second one makes).

mahont03
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How to integrate?

Bill B, thanks for the quick reply. Was kind of hoping someone would say it was worth it (not in terms of the bank balance of course...)

How is yours integrated/connected? Do you run the mains full range and then use a low x-over setting (like 40-50Hz) with the sub, or cut the mains off at a particular point and let the sub take care of the relatively low stuff (ie below 80Hz)?

Bill B
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Joined: Jul 28 2012 - 1:59pm
full range

since my (Vincent SA31MK) preamp has two sets of outputs, I run my main speakers full range from the power amp, and use one set of the preamp outputs to drive the subwoofer from its line level inputs.  I don't remember my crossover and phase settings, but I followed the recommendations of the subwoofer's manual in adjustments, and evaluated by ear and decibel meter also.

by using the mains full range, I figure they are running the way were made to run (and I don't feel like i'm "wasting" them by cutting them off with a crossover).  Also, I feel that with woofers from the mains plus from the sub, I am getting benefit of multiple woofer locations, which is kinda similar to the idea of using 2 subwoofers.

commsysman
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SUBWOOFERS

Whether you need one or two subwoofers is a question of room volume and how big and powerful each subwoofer is.

You should run the mains full-range and use the low-pass filter of the subwoofer to limit it to operating below 35 Hz or so.

mahont03
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Joined: Feb 4 2014 - 11:00am
Cheers

Thanks guys.

Got a demo/trial of 2 SVS subs next week. Boom

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