@cindyment They are Series 80s.
Do I need a subwoofer?
Hopefully I’ve framed this in a way to help people answer. Up until recently I have had a combo 2-channel/home theater system (Krell preamp with home theater bypass, Bryston 5 channel amp, PSB Synchrony 1s bi-amped speakers, Marantz home theater receiver, Power Sound Audio XV15 subwoofer, Oppo CD player). I wanted extra oomph for surround sound movie watching and occasionally some rock music, hence the sub. I was never really impressed with the XV15 sub (have it for sale now). It is insanely large and I wasn’t sure it was adding the oomph I expected, even after having a local hifi shop owner come out for a listen and tune.
What’s changed: A few weeks ago I inherited my late father’s B&W 801 speakers circa 1980, which I have put in place of my PSBs and am enjoying thoroughly despite the age difference.
My questions: (1) would a sub still be of value in my setup (I still like a lot of bass) and (2) what might folks recommend?
Thank you.
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@jerryg123 , the QLN Prestige 5s are down 3dB at 26 Hz at 1 meter which means in a normal sized room at 3 meters they are down somewhere around 10 dB. You still need subwoofers if you want to try duplicating a live performance. @olfac87 , two subwoofers is the minimal requirement for decent bass. Cindyment made a very important point. Most people do the cheap and dirty method of integrating subs by using only low pass filters on the subwoofers. Using a full two way active crossover and putting a high pass filter on the main speakers will decrease distortion in the main speakers and add a significant amount of head room to the system. The ultimate way of integrating subwoofers is with a digital bass management system such as you find in MiniDSP units and digital preamps such as the DEQX Premate, Anthem STR and Trinnov Amethyst. These allow you to adjust your speakers in time so that the sound of the subwoofers gets to your ears at exactly the same time and phase as the main speaker. Using a high pass filter and time correction allow you to put the subs where they work best, in corners or right up against a wall, and allow a higher crossover points further lowering distortion and increasing head room. With the 801s I would not want to cross over any lower than 80 Hz. The only commercial subs I like are the Magico Q series units. If you are decent with tools you can build a fine pair of subs from Dayton Kits (partsexpress.com) and save enough money to get a proper crossover, measurement microphone system and a vacation in Tuscany. |
@jerryg123 — I’d rethink that sub decision. Huge fan of ur speaks and ur hawks logo BTW. Lived in Chicago for a bit and sadly didn’t get to see them play in the old arena — one of my biggest sports regrets. Anyhoo, I was listening to an ultra mega system with “full-range” speaks that went down to the low 20s with stereo subs, and when he turned off the subs the whole soundstage collapsed and the dynamics and imaging of the whole thing took a huge step backwards. I was gobsmacked and didn’t wanna listen to his otherwise awesome system without the subs anymore — it was that huge of a difference and truly one of my top 3 AHA moments in audio (even surpassing the incredible impact of the oft-neglected preamp that is likewise HUGE IMHO). I only say this to say that even with your incredibly awesome speakers I can only aspire to, you might wanna give those subs another crack crossed over suitably low that they don’t eff up all the goodness those QLNs produce. I mean, even Wilson uses subs with their Alexandras, so... |
@mijostyn Thanks for the clear and logical explanation. I learn something new every time. |
That is not how it works. Every frequency is "down" at 3 meters, but depending on cancellation, room response, it could be up at 26. |
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