Hey
I would like to add a subwoofer to my system. I have 300b monoblocks and a 6sn7 based preamp with full range speakers (MarkAudio 12p). The preamp does have a sub output. Just looking to supplement the lower end a touch. Thinking perhaps a powered sub but not sure. Suggestions are welcome.
Thanks
I would like to add a subwoofer to my system. I have 300b monoblocks and a 6sn7 based preamp with full range speakers (MarkAudio 12p). The preamp does have a sub output. Just looking to supplement the lower end a touch. Thinking perhaps a powered sub but not sure. Suggestions are welcome.
Thanks
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You're just going to have to try it. When I was using smaller full range drivers, I bought a small 10" Paradigm sub, which worked ok. When I got the 12p Super Pensils, I realized that I didn't need it.
If you buy a powered sub, make sure it's got phase correction, at least 0-180°.
jeff
If you buy a powered sub, make sure it's got phase correction, at least 0-180°.
jeff
Thanks Jeff,
I’m really not sold on a sub. Truth is I just recently got my tube amps up and running. The 12p’s do handle the bass pretty well. Just need to listen for awhile. Good thought on phase correction
Have a good holiday
I’m really not sold on a sub. Truth is I just recently got my tube amps up and running. The 12p’s do handle the bass pretty well. Just need to listen for awhile. Good thought on phase correction
Have a good holiday
Assuming a high output impedance, you'll need to factor in the driver's Qt, which will be too high in a typical consumer sub, so typically need to DIY a low Qt subwoofer.
The Sub-1200 at Parts Express (Dayton) is an awfully easy and affordable way to try a sub. Watch for sales this time of year. (I didn't check).
DIY options can provide higher performance (deeper extension and more SPL) all depending on how big you want to go and how much you want to spend, but it will be hard to do anything for less than a cheap prefab.
First, check the output impedance of your preamp. Having a sub output doesn't mean it will be comfortable driving a solid state load in addition to your amplifiers. Some of the newer sub amps--and especially DSPs--have very low input impedance. Off the top of my head, a 6sn7 preamp will suffer with many sub amplifiers or processers if it isn't a transformer coupled output, followed by a tube buffer stage, or a "hybrid" with a SS output. If the match isn't ideal, a very basic op amp buffer can bridge the gap (starting with a CMOY type kit would be easy).
Paul
DIY options can provide higher performance (deeper extension and more SPL) all depending on how big you want to go and how much you want to spend, but it will be hard to do anything for less than a cheap prefab.
First, check the output impedance of your preamp. Having a sub output doesn't mean it will be comfortable driving a solid state load in addition to your amplifiers. Some of the newer sub amps--and especially DSPs--have very low input impedance. Off the top of my head, a 6sn7 preamp will suffer with many sub amplifiers or processers if it isn't a transformer coupled output, followed by a tube buffer stage, or a "hybrid" with a SS output. If the match isn't ideal, a very basic op amp buffer can bridge the gap (starting with a CMOY type kit would be easy).
Paul
Thanks Paul,
I’m really just trying to get up to speed on this. Your help is much appreciated