The astounding new AS-EQ1 SubEQ goes on sale!

**stevefish69** · **07-19-09, 10:24 AM**

There is a nice review of the EQ1 over at AV-Forums in the UK by a well respected member that knows his stuff.

http://www.avforums.com/reviews/SVS-...EQ-Review.html

He's basicaly confirmed what i've been hearing since the EQ1 arrived in the rack

**sgbcinti** · **07-20-09, 01:33 PM**

I was wondering if there would be an advantage of re-running Audyssey on my AVR AFTER finishing all steps of the AS-EQ1 setup. Here's my thinking:

The initial run of the Receiver's (AVR) Audyssey corrects the speakers in the system while plugged into the AS-EQ1--which at this point is acting as a "perfect subwoofer simulator". This makes the AVR think it is connected to a perfectly flat (and properly in-phase with the mains, I assume) subwoofer. In the next step step of the EQ procedure, we use this info to (manually) set the proper level for the subwoofer and the center speaker and then match the rest of the speakers to this level. Then the AS-EQ1 equalizes the subwoofer (not the rest of the system), doing its best to make the actual sub match the "sub simulator". It does a great job, but naturally the actual subwoofer performance won't be perfect. At this point, the AVR Audyssey still thinks it is connected to the "sub simulator"--a flat fq response sub and one that matches the mains for phase.

If there are any interferences (phase, frequency, or intensity) between the ACTUAL subwoofer and the mains at this point we haven't addressed them. So if we re-run the AVR Audyssey routine now wouldn't it correct any remaining (or resulting) problems in the system?

I don't have REW yet and I'm still trying to get my head around how all of this works. I'd appreciate your thoughts before I try this and maybe mess everyting up. Running 8 points of Ausyssey on a 12 speaker system is quite a commitment.

The GOOD News: Yesterday I used the AS-EQ1 to set up two new subs. Phenomenal sound! I expected an improvement in bass but I'm amazed at how much this clears up the dialogue. For my theatre the EQ1 has been well worth the price.

Thanks for your help.

Denon 5308ci
KEF 107 Mains Centers and Surrounds
Seaton Submersives
10.2 system (mains, center top and bottom, surround a and b, and back)

**Jason_Nolan** · **07-21-09, 05:45 PM**

I was reading the FAQ on most asked questions and it said that two subs should be colocated for best results.

One of the reasons I purchased this was that I thought you could time align two different subwoofers in two different locations?

This isn't the case?

Thanks,

Jason

**Doug McBride** · **07-21-09, 06:11 PM**

Quote:

Jason_Nolan wrote:

I was reading the FAQ on most asked questions and it said that two subs should be co-located for best results.

One of the reasons I purchased this was that I thought you could time align two different subwoofers in two different locations?

This isn't the case?

Thanks,

Jason

Jason - the AS-EQ1 can handle multiple subs - even more than two - just fine. In the case of more than two subs (which is what the FAQ is addressing I believe you are referring to) we are just listing the placement options for you in case you are not familiar with your options. Notice there is also a qualifier in the FAQ which is multiple subs on a "single channel" which would be the case if you have more than two subs.

In any case, the AS-EQ1 treats each of its channels as a separate source of bass and adjusts accordingly, even if there is more than one sub on that channel. We just want to make sure you don't inadvertently place those multiple subs in sub-optimal (no pun intended) locations.

Cheers,

Doug

Text of FAQ:

Question 5: Can the SVS AS-EQ1 handle more than two subwoofers?

Answer: Yes it can. There are two discrete subwoofer outputs on the SVS AS-EQ1. Either or both of
those can be attached to one or more subwoofers and the resulting subwoofer “system” is treated as a
single source of bass during calibration. Of course attention should be paid to good basic setup to avoid
more correction by the AS-EQ1 than necessary. For example, the best way to group multiple subs on a
single channel is via co-location (two subs side by side or on top of each other) which often yields a
smoother in-room (pre-correction) frequency response than separated subs. Stacked subs are not
always aesthetically acceptable, so we recommend auditioning dual subs along adjacent or common
walls. Due to the flexibility of the SVS AS-EQ1’s Audyssey software (SubEQ ™) it is very easy and
quick to perform placement trials before final calibration. The SubEQ graphical user interface shows either combined
“dual” sub or individual before and after corrections to allow you to avoid inherently
poor grouping of subwoofers in your listening environment.

AS-EQ1 FAQs:

http://svsound.com/as-eq1/as-eq1_subeq_faq.pdf

**Jason_Nolan** · **07-21-09, 07:22 PM**

Sorry, I didn't read slow enough to see that it was saying on one channel.

Thank you for the reply.

Now I'm still glad I ordered one for August.

I filled out SVS's questionare afterward. There was one thing I missed in my recommendations. I would like if SVS were to throw in one free 1 meter sub cable that way you can run this thing and not need to go out and buy another sub cable for the connect from the AVR to the AS-EQ1.

Any hopes on making this standard for my August purchase? Not a bad request for a 700 dollar bass processor...

Thanks

Jason

**cavchameleon** · **07-21-09, 10:14 PM**

Jason,

As far as I know, it does come with the cable you mention. See this review here:

http://www.avforums.com/forums/subwo...er-review.html

From that thread:

What's in the box?

The AS-EQ1 arrived well packed with the main white cardboard packaging fitting snugly inside a standard brown cardboard shipping box. Opening up the box reveals the various components, while the AS-EQ1 itself is bagged and well protected at either end by dense packing foam, some of the other components such as the cables and DVD case are left to 'rattle' around in the box. I can't see this leading to any damage to the components during transit but it would have been nice if the entire contents were more secure.

The image above shows the full contents: Manual/Software DVD, Measurement Microphone, 3 metre USB cable, power supply, pass-through cable, including rubber feet for shelf mounting and 'ears' for rack mounting, plus the optional SVS branded RCA interconnect. Below you can see a closer view of the interconnects on a pre-production model without the relevant warning and certification labels.

Ray

OOPS just read it more carefully: "optional SVS branded cable, so maybe not...

**Jason_Nolan** · **07-21-09, 10:46 PM**

Just a wish...

**bpape** · **07-21-09, 11:13 PM**

For sheer output and ease of EQ, co-locating is great. For smoothest non-eq'd response and to deal with room mode issues, try one dead center front and back or side and side.

Bryan

**Jason_Nolan** · **07-23-09, 05:02 PM**

I guess I better order some cables...

Bryan,

It will be a while yet, but I'll definitely be consulting you in the next few months. Well, maybe anyway if this house deal goes through. I'm going to be very interested in some acoustic treatment and placement and it sounds like you're the man.

Jason

**bpape** · **07-23-09, 05:28 PM**

Whenever you're ready, give me a shout Jason. I'll be happy to help.

Bryan

**sub_crazy** · **07-24-09, 06:53 PM**

I don't know if this question has been answered already but I did not come across it.

I am on the pre-order list for a AS-EQ1. I am using DIY sealed subs in my system which I EQ down low for extended response with a SMS-1. I know that the AS-EQ1 will not give me the boost down low that I need but what else can I use to add that boost before the AS-EQ1 does it's thing?

I know that a LT Circuit could do this but I have no idea of how to implement or put together one of those. I also read about a Third-Order sealed system using capacitors to lower the response which is explained by ACI here: http://www.madisound.com/catalog/PDF/SV12Specs.pdf

I don't want to use the SMS-1 to add boost down low then the AS-EQ1 to EQ everything as that would be one of an expensive option.

Right now I get extension right about the high 20's and add about a 6db boost at 22hz and it works really well.

I really don't have the room for a new ported enclosure as space is an issue so that is out.

I don't really need response down to 10hz but around 18hz would be nice and I have the drivers (Mal-X) and power QSC PLX 2502, 3002 and 3402 to get there......and no, I don't use all those amps at once.

**Jack Gilvey** · **07-25-09, 10:55 AM**

Check out the Marchand Bassis. It's basically a Linkwitz Transform but with the ability to easily vary the parameters. Wonderful thing for anyone into DIY sealed subs.

**sub_crazy** · **07-25-09, 01:55 PM**

Quote:

Jack Gilvey wrote:

Check out the Marchand Bassis. It's basically a Linkwitz Transform but with the ability to easily vary the parameters. Wonderful thing for anyone into DIY sealed subs.

I thought about the Bassis but was wondering how hard it was to use. Also with the $700 for the AS-EQ1 + $400 for the Bassis I would be looking at $1,100 just to EQ my subs which is not desirable to say the least.

I was hoping for a more cost effective approach and may have to just read up about making my own LT. I did go to http://www.linkwitzlab.com/ and they have some info there but electronic circuits are like French to me.

Is there anyplace were you could send your subs response and pay to have them make a LT for you?

I really doubt I will spend the $400 for the Bassis, I would probably only consider buying a used one if the price is right but there are none available.

The more I think about it I may be better off just keeping my SMS-1 even though I really want the AS-EQ1

Thanks for the reply.

**clausdk** · **07-26-09, 08:13 AM**

Considering the AS-EQ1 heavily. Just finished building a beast of a DIY sub which delivers in spades. However using the Behringer 1124 DSP I still have this problem:

Three measurements, one in the sweet spot and then one on either side of that in the same sofa!

Will the AS EQ1 help this problem?

**bpape** · **07-26-09, 09:06 AM**

Hate to say but EQ isn't going to fix that problem. That's purely positional based on the width dimension of the room.

Bryan

**brucek** · **07-26-09, 09:08 AM**

Quote:

clausdk wrote:

However using the Behringer 1124 DSP I still have this problem:

Three measurements, one in the sweet spot and then one on either side of that in the same sofa!

You have that problem because you didn't take three measurements with REW and then press the Average button to get a new averaged response that you apply your filters to. That set of BFD filters wouldn't result in a 'sweet spot', but rather offer the best response available over the couch area. With REW you can take up to eight measurements and then create a new average response from those eight. REW will then recommend its filters based on the average response.

Often, people use a set of 'sweet spot' filters and a set of 'average' filters, depending on the audience present.

brucek

**bpape** · **07-26-09, 09:20 AM**

True, but it's still not going to fix that problem. One seat has a peak, one has a dip, one is essentially flat. You CAN'T EQ that. Best you can do is leave it alone. Now, at places other than 40Hz, some look like you could get decent improvement.

At 40, you're stuck unless you can treat the room with something that will deal with something that low

OR

You can potentially play with sub positioning and you get lucky enough to introduce complimentary responses at those 3 seats that will help to cancel all of the issues. Sometimes you can do this via introduction of tangential and/or oblique modes.

Bryan

**clausdk** · **07-26-09, 10:18 AM**

Thanks for all the input. Will try using REW with the avg response as mentioned and see what it recommends.

The response measured in the three spots is within 2 meters...pretty amazing peak and dip so close to eachother. Although I have the dip/peak problem the bass on the entire couch is still very good.

Was originally set on building 2 maelstrom x 18" subs, but finishing one now and seeing it in action only reason for building the 2nd would be smoother response, as output right now is outstanding and absolutely beyond what I imagined.

I'm still tempted on the EQ1 as alot of people seem to praise it.

**jpk** · **07-27-09, 05:08 PM**

Quote:

Doug McBride wrote:

Joe - I have not seen this particular error, but I have seen errors indicating the background noise was too great for it to get a good reading (and it was pretty sensitive - lawn mower about 100 feet away through closed windows).

I'd suggest trying a few things to see if the issue won't go away:

1. Remove power from the unit (unplug) for a minute then re-power.
2. Do a quick 3 measurement cal and permanently save the results to the AS-EQ1.
3. Make sure your microphone connection is clean and tight into the AS-EQ1, as well as checking the physical integrity of the mic itself.
4. Make sure you are using known and verified good interconnects between the AS-EQ1 and your receiver.
5. De-install, then re-install SubEQ.

Steps 1, 2 and 5 are intended to reset and get to a known good state with the device and software. Step 3 and 4 are making sure connections and hardware are sound.

Sorry if these seems a little "shotgun-y", but we've not seen this before. Let us know how it turns out and if these steps do not rectify, we'll take it to Audyssey.

Edit: I just assumed you went through the Level Match process OK, but you know what happens when you assume... Did you, and how did that work out? Are you using the Multi-Channel analog inputs for the Sat? Any digital processing on that input disabled (usually isn't any but I had to ask)?

Thanks,

Doug

Hi Doug,
I went through your directions and re-did everything. The only exception being I uninstalled the software with MS uninstall, to later see a SVS/Audyssey uninstall routine on the setup CD? I don’t think this will cause any problems.
Level Match went OK w/ LF, the same speaker/satellite error as before?
Level match went OK w/Center, did 3 position cal. SVS/Audyssey recommended a 140 Hz crossover? (Center Specs: Frequency response: 46-20kHz ± 3db anechoic, 60-20kHz ± 1.75db) I’m keeping it at 80 unless I hear otherwise? I did save this cal.
I then tried the RF speaker, level check OK and started a 6 position cal, and cancelled, (phone rang), went to listen and WOW! Bass circuit volume is wide open, nothing but bass! I redid and saved and all is fine.
Strange the bass got ramped up to full volume with cancelled calibration?
Since only the left is causing sub/sat error problems, I must have something weird going on here?
Otherwise all seems well again!

Thanks Doug,
Joe

**jpk** · **07-29-09, 03:17 PM**

Phase Question(s)
I went to play a Chesky DVD-A sampler/setup disk and for some reason I let it go through the setup part. All seemed well until I got to the sub phase test. Lo and behold the subs were out of phase? I reversed the phase via a front panel switch on the amps and the volume maximized. I redid a 9 position cal and things are sounding even better.

I'm a bit surprised there's a phase inversion somewhere in the system? How could this get missed in the setup?

Joe

**GregBe** · **07-31-09, 04:21 PM**

I love the fact that this thing eq's multiple subs for multiple seats seperately. I am bulding my dedicated home theater, and will be adding multple PB10 to my one lonely one sitting in the corner right now.

**Roger Dressler** · **08-03-09, 10:35 PM**

Quote:

GregBe wrote:

I love the fact that this thing eq's multiple subs for multiple seats seperately.

I think you're overstating the case a bit. It first sets the level and delay for each subwoofer and then creates a room correction solution for both subwoofers combined (not individually).

The room correction is indeed determined by looking at the responses in several seats. But that is not the same as applying individual EQ to each seat separately. It's one EQ curve that is a best compromise for all the seats.

**Kal Rubinson** · **08-03-09, 10:39 PM**

Quote:

Roger Dressler wrote:

The room correction is indeed determined by looking at the responses in several seats. But that is not the same as applying individual EQ to each seat separately.

How would you apply EQ to a seat?! More seriously, how would you apply EQ to a speaker that is individual for each seat?

Quote:

It's one EQ curve that is a best compromise for all the seats.

Yup.

**Roger Dressler** · **08-04-09, 12:37 AM**

Quote:

Kal Rubinson wrote:

How would you apply EQ to a seat?! More seriously, how would you apply EQ to a speaker that is individual for each seat?

Exactly. Hence the problem with the original statement.

**BigPines** · **08-04-09, 08:58 AM**

Quote:

Roger Dressler wrote:

It's one EQ curve that is a best compromise for all the seats.

Actually, if you are EQing two discrete subs with this unit, it is *two* EQ curves best compromised for all seats.

Mike

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