The astounding new AS-EQ1 SubEQ goes on sale!

[Lordoftherings]

CharlieU wrote:

I was pretty amazed when I looked at the graph considering that I put the 20-39 in a pretty terrible location. The biggest difference is how it cleaned up the overall sound of my system. Everything is clearer now, much more detail in the mid frequencies.

Thanks Charlie for the feedback.

I am following this with great interest, and I'm almost ready to pull the trigger.
At this price and performance, the AS-EQ1 seems to be a no-brainer.
And it is perfect for my two 15" subs.

Regards,

Bob

[Patrick Nevin]

Ed Mullen wrote:

In my experience, the AS-EQ1 runs quite cool - I've had one idling in my office for days and it's cool to the touch. It is designed to be left on for extended periods of time without harm.

The phase control on the subwoofer should be left at 0 when setting up the AS-EQ1. It will provide you with the correct subwoofer distance to input in the AVR, which is a combination of the acoustic distance and the latency of the AS-EQ1 (about 8.5 ms). Your AVR should provide you with the correct loudspeaker distances during the auto-set-up routine.

The time alignment of the speakers and the subwoofer should then be fairly close. Dialing in more phase at the subwoofer plate amp without independently verifying the effect on the FR is not advised.

The speaker/sub crossover formed by your AVR at the selected crossover frequency is comprised of a 2nd order high pass and 4th order low pass. Whether or not this crossover is actually perfectly phase correct for any selected crossover frequency is dependent on the in-room FR of the speaker and subwoofer, but my guess would be not.

This type of AVR crossover network stems from the THX days, where a sealed speaker with an 80 Hz roll-off was specified. The idea was that cascading a 2nd order high pass over the acoustical 2nd order roll-off resulted in a 4th order high pass, which would then match the 4th order low pass of the subwoofer, resulting in a phase-correct crossover. The use of anything but a sealed speaker with an 80 Hz roll-off pretty much upsets the apple cart, and if your speakers are vented with varying F3 points, then your chances of obtaining a perfectly phase-correct crossover with the subwoofer at any given crossover frequency are pretty slim.

So my advice from a practical real-world standpoint is to set all your speaker and subwoofer distances correctly in the AVR, set all your speakers to Small, and then select a crossover frequency (or frequencies if your AVR has the capability to provide individual crossover frequencies for each channel) which protects each speaker from being overdriven in the bass regions.

Ed,

The ASEQ1 is running much cooler now. Also I said that I am running the sub at 16 feet away and that is because the software said to set it at 16.3 feet. Should I set the sub at 16 and a half feet away. Thanks for the crossover information.

Thanks
Patrick

[Lordoftherings]

Patrick Nevin wrote:

Ed,

The ASEQ1 is running much cooler now. Also I said that I am running the sub at 16 feet away and that is because the software said to set it at 16.3 feet. Should I set the sub at 16 and a half feet away. Thanks for the crossover information.

Thanks
Patrick

This is very impressive Patrick. The distance is dead on, because you have to take into consideration that the actual distance from your sub, start from the voice coil of the driver.
When you measure the distance from a big driver like a sub, you always add about 4 inches more to take account of the distance from the baffle of the driver to the dust cap and even the voice coil. If you can set it at 16.3 feet, it is right on target. If not, 16.5 feet should be fine too, when you take into consideration the distance from your two ears to the center of your head. And a sub with a 15" or 18" driver, you can add and additional inch or so.
I think that Ed will be able to confirm this.

So, it is exactly accurate! Quite amazing indeed.

Bob

[Patrick Nevin]

Lordoftherings wrote:

This is very impressive Patrick. The distance is dead on, because you have to take in consideration that the actual distance from your sub start from the voice coil of the driver.
When you measure the distance from a big driver like a sub, you always add about 4 inches more to take account of the distance from the baffle of the driver to the dust cap and even the voice coil.

So, it is exactly accurate! Quite amazing indeed.

Bob

Yes Bob it is really amazing. I just have to figure out how to post my results on here. Any ideas?

Thanks
Patrick

[Patrick Nevin]

Results

Before


After

[Lordoftherings]

Patrick Nevin wrote:

Yes Bob it is really amazing. I just have to figure out how to post my results on here. Any ideas?

Thanks
Patrick

Sorry Patrick, I'm not good with these things myself.
But I'm sure someone else will be able to help you out.

Ed or Kal perhaps.

Cheers,

Bob

[Patrick Nevin]

Bob I did get it figured out. Look at the bottom of page 11

[JimP]

Patrick Nevin wrote:

Ed,

The ASEQ1 is running much cooler now. Also I said that I am running the sub at 16 feet away and that is because the software said to set it at 16.3 feet. Should I set the sub at 16 and a half feet away. Thanks for the crossover information.

Thanks
Patrick

I'm not sure that I'm reading your post correctly, but if you're saying that you should physically move your subwoofer box to a position 16 feet away, then you're misreading the instructions. What it is telling you to do is to change the subwoofer distance in your receiver's setup menu to read 16.3 feet.

[Patrick Nevin]

JimP wrote:

I'm not sure that I'm reading your post correctly, but if you're saying that you should physically move your subwoofer box to a position 16 feet away, then you're misreading the instructions. What it is telling you to do is to change the subwoofer distance in your receiver's setup menu to read 16.3 feet.

Hi Jim,

I have the distance in the receiver at 16 feet. I am just wondering if I should just make the distance in the receiver at 16 or 16 and a half feet away in the receiver with the reading at 16.3 feet.

Thanks
Patrick

[JimP]

Patrick,

If your receiver allows it, while playing content change the sub distance from 16 to 16.5 and pick the one that sounds the best.