Polk sub vs klipsch sub

[everettT]

At 1w it looked abysmal. There was hope with the OPs response with diy.

As my father-in-law says, if you can't listen, you'll just have to feel. After you realize the time, effort, and money you've wasted on your epic failure, come back when you're ready to listen.

Here are a few simulations of predicted frequency response at 150 watts. The pink line is what you intend to build. It will have a Q around 0.76 -- not horrible, but still not critically damped. The purple line is your same driver in a 1ft³ box with a 4"⌀ * 11 5/8" vent, which you could flatten a bit with EQ but it's still Xmax limited and worthless below 40Hz. The yellow line is the Infinity 1260w that others suggested to you in a 2.6ft³ vented box tuned to the Fs of the driver. The 1262w models very similarly (although it requires slightly different tuning), and can be wired for 8 ohms if you want to use a less expensive amplifier.

What you're not realizing is that cabin gain in a car will boost frequencies below 40Hz, but the gains in a room where there's so many thousands more cubic feet to pressurize are much less profound. For home theater, you need a driver with a lower resonant frequency. Your bargain driver is no bargain if it doesn't do what you need it to do.

 

[JOHN FICKEL]

I have and I really couldn't tell the difference , Unless you distance each subwoofer ridiculously far away.

 

[JOHN FICKEL]

And my actual distance, compared to the AVR distance is only six Feet further away. Honestly that difference in distance is probably milliseconds of delay time to the sub.

 

[lovinthehd]

And my actual distance, compared to the AVR distance is only six Feet further away. Honestly that difference in distance is probably milliseconds of delay time to the sub.

Yes, you are dealing with ms of delay using the distance settings, think it's about 1ms per foot.

 

[Grassy]

I asked him on Facebook.. And he told me.. As a starting point, it's good to measure with a tape measure. What matters is how it blends. Verbatim!

I would have thought that audyssey(for example) would be used first, and THEN correct the measurements with a tape measure.If we manually correct Audyssey and input the correct measurements into the AVP or AVR then i cannot see a downside to that, otherwise why would distances matter in the first place.Unless other measurements that Audyssey(for example)makes(not being distances), actually help in giving us a distance reading.

 

[everettT]

Since the op hasn't been around seen since the 8th, I doubt he cares about what we have to say. Maybe he is still trying to figure out how to model a TL speaker box.

 

[lovinthehd]

I would have thought that audyssey(for example) would be used first, and THEN correct the measurements with a tape measure.If we manually correct Audyssey and input the correct measurements into the AVP or AVR then i cannot see a downside to that, otherwise why would distances matter in the first place.Unless other measurements that Audyssey(for example)makes(not being distances), actually help in giving us a distance reading.

The "distance" setting is an adjustment of delay. Audyssey and the avr calculate based on what it hears via the microphone (so placement can have an effect) but your room can also affect response in this regard. Whether you want to use that calculated by the avr or stick to physical measurement is your choice. In the case of a subwoofer the sub's amp has processing time which is accounted for by delay, not necessarily physical distance....

 

[everettT]

I'll repeat this for those who haven't read the thread, unless crossedover in the vocal range, it shouldn't matter.

 

[Grassy]

The "distance" setting is an adjustment of delay. Audyssey and the avr calculate based on what it hears via the microphone (so placement can have an effect) but your room can also affect response in this regard. Whether you want to use that calculated by the avr or stick to physical measurement is your choice. In the case of a subwoofer the sub's amp has processing time which is accounted for by delay, not necessarily physical distance....

Thanks mate,that makes a lot off sense.

 

[JOHN FICKEL]

Yeah I was just referring to what Gene, told me directly. There is nothing wrong with using YPAO or Any other automatic calibration. He said, All that matters is how it blends in with the Speakers.. Iv used YPAO and now I'm using the actual physical distance, and so far I prefer the physical distance sound better. Sounds a lot more Punchy .. Sorry I missed your guys post

 

[JOHN FICKEL]

Now there is a good video on this site. It's title is, how to set up your AV receiver. And in that video they mention it's good to start off with the auto calibration, and then do a commonsense double check. Either way I just listened to both ways and preferred the manual calibrations .