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SVS AS-EQ1 Thoughts... - Page 8

post #211 of 6280
Quote:
Originally Posted by jonnyozero3 View Post

I'd be interested in learning what the differences are between the 8033 and the AS-EQ1

At least the AS-EQ1 marketing speech is excellent. They have managed to turn some shortcomings (like the limited impulse response of FIRs) into technological advantages. :-)
post #212 of 6280
Quote:
Originally Posted by a1bert View Post

At least the AS-EQ1 marketing speech is excellent. They have managed to turn some shortcomings (like the limited impulse response of FIRs) into technological advantages. :-)

Hi a1bert, can you point me to where I can read about the shortcomings like the limited impulse response of FIRs?

- Jeff
post #213 of 6280
Quote:
Originally Posted by pepar View Post

where I can read about the shortcomings like the limited impulse response of FIRs?

The shortcomings of course depend on the application.

FIR is by definition finite impulse response filter (for example http://en.wikipedia.org/wiki/Finite_impulse_response). The memory FIR has (the delay line) equals the number of filter order + 1, the result of the filter is a sum of the values in the delay lines times their respective filter coefficients. Any sample that is fed to FIR can only affect the result while it is in the delay line.

There are plenty of applications that FIR suits well. One good thing about FIR's is exactly that "finite", because possible calculation errors do not stay in the system for long. DSP's are also very efficient in calculating FIR's (multiply-accumulate instruction, two data fetches per cycle, loop-hardware). But if you need narrow filters, or good suppression in the stop-band, or you require good ripple characteristics on the pass-band, the filter order needs to be increased, which in other words increase the length of the impulse response. The narrower filter bandwidth or the steeper the transition bands, the longer the required impulse response. After a certain point the length of the FIR becomes a memory and calculation bottle-neck, and it also introduces delay to the signal (normally the filter order divided by two).

In these cases IIR (infinite impulse response) is usually the answer. The filter can affect the signal for a much longer time with fairly little calculation, although the calculation must be performed with better precision than with FIR.

Of course I may have interpreted something in the wrong way in the promo sheet, as it really does not say much about the technology. They use "sophisticated FIR-based methods", but FIR itself doesn't make them sophisticated. Anyway, that's marketing.
post #214 of 6280
Hi,

Any news concerning the final availability?

Thks.

Hugo
post #215 of 6280
Helloooo, Ed, que passa?
post #216 of 6280
Hi there, so far I've read it will interface with MCACC and Audyssey (duh), but I was also wondering if it could by chance interface with YPAO on Yamaha recievers, this question may have already been answered, so I apologize if it has.
post #217 of 6280
Any word on when this thing is going to be available? I'm surprised it's been since August with no other posts.
post #218 of 6280
Quote:
Originally Posted by bambam View Post

Any word on when this thing is going to be available? I'm surprised it's been since August with no other posts.

No new news. There was a flurry of activity around the CEDIA show including, I'm told, them showing one. But nothing since then. Even "insiders" aren't saying anything. I'm sure that it's still coming, but don't know when. CES is a few weeks away - maybe we'll know more then. This thing has a gestation period longer than an elephant. I can imagine the labor pains . . .
post #219 of 6280
Got this reply when i asked for info on the AS-EQ1. We are officially in production on this box, finally. It’s a stunningly effective box I’d give for free to every SVS owner if I could, they are THAT good.


Pre-orders will probably start during CES, with an exceptionally low $699 price. MSRP will probably be $799. The rub is that we’ll start pre-orders much earlier (no charge till it ships of course) than we would for most products given long lead times on finished electronics goods like this. We are hoping for a launch in Asia in March and US shipping in April.


The worse your room is, the more this box solves a long standing problem, perfect bass in tough spaces. In minutes, no spread sheets. I can hardly live without the one prototype I have, but it’s being refurbed for official showing at CES right now.

Hope that helps your planning, Stay tuned to our News page. CES updates will be coming fast and furious soon. The updated promotional sheet on this box will be something you’ll want to see I’m sure. Final styling and both front and back photo teasers will be there!

Ron

SVS
post #220 of 6280
That's a good news !
post #221 of 6280
What is the upper limit on this unit?

100HZ?
120
150
200?
post #222 of 6280
I have it on good authority that SVS will begin taking pre-orders for their Audyssey-powered AS-EQ1 sometime this month.
post #223 of 6280
Quote:
Originally Posted by spyboy View Post

What is the upper limit on this unit?

100HZ?
120
150
200?

It has a brick-wall low-pass at about 1.4 kHz. Most subwoofer plate amps have an internal (i.e., non-user-adjustable) low-pass somewhere in the 350-500 Hz range anyway. Regardless, the low pass filter being imposed on the incoming subwoofer signal will always be the controlling variable, and not the AS-EQ1, which will always EQ the subwoofer out to its internal low-pass.
post #224 of 6280
Quote:
Originally Posted by pepar View Post



Over on the "Audyssey" thread -

http://www.avsforum.com/avs-vb/showt...7#post15474647

And I've posted there for members to post their SVS AS-EQ1 questions here.

Thanks Pepar.

There was some talk that before that the EQ1 would be able to integrate with existing MultEQ XT receivers. I have an Onkyo 705 that I'm not planning to upgrade for a couple years. Will the EQ1 integrate well with my Onkyo?

Also, how much benefit will I get over the MultEQ XT if I only have one sub (SVS Ultra/2)?

Thanks.
post #225 of 6280
Quote:
Originally Posted by dewd View Post

Thanks Pepar.

There was some talk that before that the EQ1 would be able to integrate with existing MultEQ XT receivers. I have an Onkyo 705 that I'm not planning to upgrade for a couple years. Will the EQ1 integrate well with my Onkyo?

Also, how much benefit will I get over the MultEQ XT if I only have one sub (SVS Ultra/2)?

Thanks.

Yes, the AS-EQ1 will work with any auto-EQ AVR. When placed in calibration mode, it essentially loops the AVR subwoofer test ping back to the AVR mic input. The AVR thinks the subwoofer FR is perfect, so it doesn't build a correction file. After the AVR EQs all the speaker channels, you can run the AS-EQ1 and calibrate the subwoofer.

With one subwoofer, the benefit of the AS-EQ1 over a consumer AVR is a more accurate and powerful correction algorithm. It has the processing power of the MultEQ XT Pro version, which is not found in consumer AVRs.
post #226 of 6280
Quote:
Originally Posted by Ed Mullen View Post


With one subwoofer, the benefit of the AS-EQ1 over a consumer AVR is a more accurate and powerful correction algorithm. It has the processing power of the MultEQ XT Pro version, which is not found in consumer AVRs.

Ed what can someone with two subs expect? Does it take their interaction into account and treat each sub differently?

Thanks
post #227 of 6280
Hi Ed,

How would someone use the AS-EQ1 to help place their subwoofer in the room? Is there a way to compare the output of one placement to another. I am talking about a single subwoofer for my application, but other subscribers will want to know about dual subwoofer placement.

I realize the the AS-EQ1 will do the best it can with the subwoofer and placement it is given, but the same subwoofers corrected response in the listening may be better or worse with different room placements.
post #228 of 6280
Quote:
Originally Posted by LeRoyK View Post

Hi Ed,

How would someone use the AS-EQ1 to help place their subwoofer in the room? Is there a way to compare the output of one placement to another. I am talking about a single subwoofer for my application, but other subscribers will want to know about dual subwoofer placement.

I realize the the AS-EQ1 will do the best it can with the subwoofer and placement it is given, but the same subwoofers corrected response in the listening may be better or worse with different room placements.

Are you asking if the unit has the ability to save and display the before/after results of multiple calibration runs, so the user can compare and choose the most optimal solution?
post #229 of 6280
Quote:
Originally Posted by t6902wf View Post

Ed what can someone with two subs expect? Does it take their interaction into account and treat each sub differently?

Thanks

Yes, it will handle dual subs independently, correcting for both FR and distance and it will also then ping both subs together and take into account their interaction and then build the final correction algorithm.
post #230 of 6280
Quote:
Originally Posted by LeRoyK View Post

Hi Ed,

How would someone use the AS-EQ1 to help place their subwoofer in the room? Is there a way to compare the output of one placement to another. I am talking about a single subwoofer for my application, but other subscribers will want to know about dual subwoofer placement.

I realize the the AS-EQ1 will do the best it can with the subwoofer and placement it is given, but the same subwoofers corrected response in the listening may be better or worse with different room placements.

It will generate before/after FR graphs (with better scale/resolution than you see on the AVR GUIs), so you can assess which locations in the room have the best before/after responses. When you find the location you like the best, then permanently save that correction file to the AS-EQ1.
post #231 of 6280
This sounds excellent. I like the Audyssey on my receiver. Assuming a "normal" system I think Audyssey can do a better job EQ-ing then a manual EQ.

BUT, I do want a tool to help with placement. I don't want to get into EQ-ing the system myself. I'd like something I can use to find the best placement and then let the automated system EQ it and forget it.

I guess I am the demographic.

Ed I have two more questions. When will a revised cut sheet be available? Is the FR display shown on the unit or the HT systems display?
post #232 of 6280
Quote:
Originally Posted by t6902wf View Post

This sounds excellent. I like the Audyssey on my receiver. Assuming a "normal" system I think Audyssey can do a better job EQ-ing then a manual EQ.

BUT, I do want a tool to help with placement. I don't want to get into EQ-ing the system myself. I'd like something I can use to find the best placement and then let the automated system EQ it and forget it.

I guess I am the demographic.

Right - the AS-EQ1 is not for the tweaker crowd. If you are a tweaker, or if you want to build a non-flat response (like a "house curve") then use REW, your SPL meter, and a Behringer PEQ.

The AS-EQ1 is for the enthusiast who wants the best possible EQ solution for the subwoofers(s) from a given location with a minimum amount of time/set-up/learning curve. It's literally a set-it and forget it system.

In addition, the adaptive algorithm for measuring in multiple locations at the listening positions is very powerful, and will result in the best possible FR at all listening positions within the "listening bubble". That is something difficult to achieve with manual EQ methods.
post #233 of 6280
Quote:
Originally Posted by Ed Mullen View Post

It will generate before/after FR graphs (with better scale/resolution than you see on the AVR GUIs), so you can assess which locations in the room have the best before/after responses. When you find the location you like the best, then permanently save that correction file to the AS-EQ1.

Thanks Ed, that was a very good answer.

Following up, if the before FR graph is really bad at a location, can we view it and abort doing the calculations?
post #234 of 6280
Hi Ed,

Can you shed a bit of light on how the AS-EQ1 will work in conjunction with Audyssey Pro? Also, how many points should be measured when setting up the AS-EQ1?

TIA!

Jeff
post #235 of 6280
Quote:
Originally Posted by Ed Mullen View Post

The AS-EQ1 is for the enthusiast who wants the best possible EQ solution for the subwoofers(s) from a given location with a minimum amount of time/set-up/learning curve. It's literally a set-it and forget it system.

Ed - can you tell us what makes the AS-EQ1 better or different than the Anti-Mode 8033? It looks like it would cost substantially less and does the same thing. Surely SVS will have better support which is worth something but the AS-EQ1 is double the cost.
post #236 of 6280
Quote:
Originally Posted by MUCHO View Post

Ed - can you tell us what makes the AS-EQ1 better or different than the Anti-Mode 8033? It looks like it would cost substantially less and does the same thing. Surely SVS will have better support which is worth something but the AS-EQ1 is double the cost.

I was wondering the same thing.

Bill
post #237 of 6280
I don't think the Anti-Mode supports multiple subs.

Even if two AMs are used there is no independent delay/phase adjustment like that in the AS-EQ1....not to mention that the AM will not have near the processing power needed for all environments.
post #238 of 6280
Heh, now that I've heard of Anti-Mode 8033 and googled it, that would be good to know.
post #239 of 6280
Quote:
Originally Posted by jpmst3 View Post

I don't think the Anti-Mode supports multiple subs.

Even if two AMs are used there is no independent delay/phase adjustment like that in the AS-EQ1....not to mention that the AM will not have near the processing power needed for all environments.

I have two HSU 3.3's and two HSU MBM-12's that the Anti Mode handled just fine. You can have all the subs you want on the LFE output and the Anti Mode looks at them as one big unit for calibrating.

Bill
post #240 of 6280
Quote:
Originally Posted by bsoko2 View Post

I have two HSU 3.3's and two HSU MBM-12's that the Anti Mode handled just fine. You can have all the subs you want on the LFE output and the Anti Mode looks at them as one big unit for calibrating.

Bill

I see it's not just a straight EQ and that it, like Audyssey, also operates in the time domain. I think I will cross post this in the Audyssey thread for Chris' insight.
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