Official Power Sound Audio Thread.

[Goat1]

Originally Posted by mreilly611

The forth movie in the Underworld Series has some of the best all around sound I have heard in a Blu-Ray & Kate Beckinsale does not hurt the movie one bit

I agree,Underworld Awakening.. That is one of the best movies for overall sound period!

[Tom V.]

Hi all,

I might have been a bit vague in the previous post.

1)Set all speakers to small/80hz to start(feel free to experiment with other frequencies as what works best will be equipment and room dependent).
2)Turn the crossover on the subwoofer to its maximum setting(effectively bypassing it)

The crossover on the subwoofer should only be used when the signal being sent to the subwoofer is NOT being filtered. If you have a 5.1(or 7.1 / 9.1) receiver it IS filtering the bass signal(aka "bass management) already. So barring some very unusual circumstances...keep the crossover control on the subwoofer set to its maximum position.

Tom V.
Power Sound Audio

[rpneuss]

Originally Posted by Tom V.

Hi all,

I might have been a bit vague in the previous post.

1)Set all speakers to small/80hz to start(feel free to experiment with other frequencies as what works best will be equipment and room dependent).
2)Turn the crossover on the subwoofer to its maximum setting(effectively bypassing it)

The crossover on the subwoofer should only be used when the signal being sent to the subwoofer is NOT being filtered. If you have a 5.1(or 7.1 / 9.1) receiver it IS filtering the bass signal(aka "bass management) already. So barring some very unusual circumstances...keep the crossover control on the subwoofer set to its maximum position.

Tom V.
Power Sound Audio

This is exactly how I have mine setup. Thanks Tom!

[Magicmonger]

Originally Posted by Tom V.

Hi all,

I might have been a bit vague in the previous post.

1)Set all speakers to small/80hz to start(feel free to experiment with other frequencies as what works best will be equipment and room dependent).
2)Turn the crossover on the subwoofer to its maximum setting(effectively bypassing it)

The crossover on the subwoofer should only be used when the signal being sent to the subwoofer is NOT being filtered. If you have a 5.1(or 7.1 / 9.1) receiver it IS filtering the bass signal(aka "bass management) already. So barring some very unusual circumstances...keep the crossover control on the subwoofer set to its maximum position.

Tom V.
Power Sound Audio

Awesome, thanks Tom...

[Tom V.]

Originally Posted by Goat1

Nice to see Tom keeping an eye on us.. :P Love my sub by the way Tom!
What if you put all your speakers at 80 and sub at 80?

Hi Goat, glad you like it!

Keep the subwoofer crossover set to its highest setting(effectively bypass).

Your receiver is already filtering the bass before it goes to your sub.

Tom V.
Power Sound Audio

[Goat1]

I already do that,but what should I set the crossover on the sub at in the receiver? Right now I have all speakers and sub at 80.

[Tom V.]

Originally Posted by mreilly611

Below is Toms Advice where did he say to set to 80Hz

2)The LFE channel itself. I've seen some receiver's that allow the user to select a crossover point for this channel. (they usually offer 80/100/120hz). Since the LFE channel itself is specced 3-120hz I don't see any viable reason to "filter" it so I would set this option to OFF/120hz if you have it available.

Tom V.
Power Sound Audio

Tom is saying to set filter Off and to 120Hz on sub. Dont mean to be a Blank Head. Fill in the blank.

Not sure exactly what is being said here BUT---

My comment quoted above refers ONLY to settings in the receiver/processor. (nothing to do with settings on the subwoofer itself). Remember..."LFE" is a channel encoded on to the DVD/Blu-Ray. In SOME receivers/processors you have the option to filter this channel. I would not activate those filters.

Tom V.
Power Sound Audio

[Tom V.]

Originally Posted by Goat1

I already do that,but what should I set the crossover on the sub at in the receiver? Right now I have all speakers and sub at 80.

Hi Goat,

You still running the 805?

I ask because the receiver should give you ONE option for a frequency for each channel. For example, if you select "80hz" that will add an electronic HIGHPASS filter for the speaker AND a 80hz LOWPASS filter simultaneously.

The highpass filter literally means...."highs pass". So at 80hz, everything HIGHER than 80hz will PASS to the speaker in question...let's say center channel. AND, the lowpass filter means the same...."everything LOWER than 80hz(in the center channel signal encoded on the disc) will be rerouted electronically inside the receiver to the subwoofer RCA output jack.

Tom V.
Power Sound Audio

[Goat1]

Yes,I am running the 805. If I have all my speakers at 80 won't everything below 80 go to the sub? I can set the speakers crossovers individually. Fronts go from full band to 60 and up.

[mreilly611]

Originally Posted by Tom V.

Not sure exactly what is being said here BUT---

My comment quoted above refers ONLY to settings in the receiver/processor. (nothing to do with settings on the subwoofer itself). Remember..."LFE" is a channel encoded on to the DVD/Blu-Ray. In SOME receivers/processors you have the option to filter this channel. I would not activate those filters.

Tom V.
Power Sound Audio

On most subs you have a filter switch. If using bass management in receiver it should be set to off on Sub. Also sub knob should be set to 120hz or its highest setting. That is all I am saying.

On receiver you could put to 80hz but I use 120hz. Most people run room correction on receiver (audyssey, arc, ect..) when I run Audyssey it alway sets my sub crossover to 120hz. On my understanding if you lower what room correction sets you are actually turning room correction off for that speaker. So coming down to 80hz from 120hz to me does not make sence. That is the same for all speakers if you run room correction on receiver. You can set higher on crossover but you should not come down in crossover.

[Tom V.]

Originally Posted by Goat1

Yes,I am running the 805. If I have all my speakers at 80 won't everything below 80 go to the sub?

Yes.

BTW, page 88 of your manual discusses the LFE filter I mentioned in previous posts.

Tom V.
Power Sound Audio

[rpneuss]

Originally Posted by mreilly611

On most subs you have a filter switch. If using bass management in receiver it should be set to off on Sub. Also sub knob should be set to 120hz or its highest setting. That is all I am saying.

On receiver you could put to 80hz but I use 120hz. Most people run room correction on receiver (audyssey, arc, ect..) when I run Audyssey it alway sets my sub crossover to 120hz. On my understanding if you lower what room correction sets you are actually turning room correction off for that speaker. So coming down to 80hz from 120hz to me does not make sence. That is the same for all speakers if you run room correction on receiver. You can set higher on crossover but you should not come down in crossover.

In my experience room correction wasn't perfect at all. It set the fronts to large which they are decent size speakers but that made my subwoofer weak. When I made all of my speakers small my system came to life! I guess my point is don't totally trust your room correction. Try things and go with what you like. The audessy calibration is a good starting point though but I fine tuned it a bit.

[Goat1]

Its common knowledge that audyssey puts your fronts to large. Sometimes puts your sub 12ft out when its only 2. But using it for movies it sounds awesome! I wouldn't go without it.

[mreilly611]

Originally Posted by rpneuss

In my experience room correction wasn't perfect at all. It set the fronts to large which they are decent size speakers but that made my subwoofer weak. When I made all of my speakers small my system came to life! I guess my point is don't totally trust your room correction. Try things and go with what you like. The audessy calibration is a good starting point though but I fine tuned it a bit.

That is good room correction is not perfect. Same with mine on Audyssey it set my front and center to full band. Now with my Onkyo 818 it has Audyssey XT 32 and sets my fronts to 40hz and center to 40hz. So it is the right thing to do in experimenting. And going to a higher crossover for fronts is the correct thing to do as long as you are going higher so full band to 80hz is good you are still using room correction and sending the bass to your sub.

But there are things you should and should not do. These 3 stickies are all you need to setting up a great system.

A Guide to Audyssey and room correction

https://forum.blu-ray.com/showthread.php?t=159948

A Guide to Bass Management

https://forum.blu-ray.com/showthread.php?t=95817

And Using A SPL Meter To Calibrate Your System (Sound Level Meter)

https://forum.blu-ray.com/showthread.php?t=38765

These 3 Threads answer all question.

[mreilly611]

Originally Posted by Tom V.

Yes.

BTW, page 88 of your manual discusses the LFE filter I mentioned in previous posts.

Tom V.
Power Sound Audio

Went to page 88 of the Onkyo 875/805 manual this is what it says.

Low-Pass Filter for the LFE Channel

With this setting, you can specify the cutoff frequency of
the LFE channel’s low-pass filter (LPF), which can be
used to filter out unwanted hum. The LPF only applies to
sources that use the LFE channel.
*If you’re using THX-certified speakers, select
80 Hz (THX).

(Thats it, It really clears it up)


Now we can get back to what this thread is about the PSA Sub. Which I hope to get when I free up some money.

[Tom V.]

Originally Posted by mreilly611

Went to page 88 of the Onkyo 875/805 manual this is what it says.

Low-Pass Filter for the LFE Channel

With this setting, you can specify the cutoff frequency of
the LFE channel’s low-pass filter (LPF), which can be
used to filter out unwanted hum. The LPF only applies to
sources that use the LFE channel.
*If you’re using THX-certified speakers, select
80 Hz (THX).

(Thats it, It really clears it up)

Yup, I'm not even sure what they are referring to here..."hum"? when is there going to be "hum" specific to the LFE channel and only in the 80-120hz range? Honestly, this sounds like someone looking at this feature (being able to apply a LFE channel specific filter)....and thinking...."what the HECK would anyone want this for......well, I better make something up for the manual..."

Tom V.
Power Sound Audio

[Goat1]

You mean our Mirage speakers and the PSA sub isn't THX certified? I'm assuming its the amount of power a speaker is rated at?

[mreilly611]

Originally Posted by Goat1

You mean our Mirage speakers and the PSA sub isn't THX certified? I'm assuming its the amount of power a speaker is rated at?

Dont assume. Because you will always be wrong. I can swing it to fit my needs, Everytime.

Copied from THX Website Re: Receivers

How THX Certification Works

From early design concepts to product rollout, THX works with its manufacturing partners at each step of product development. Every detail is meticulously mapped to the THX performance standards. And THX engineers spend countless hours testing and analyzing each product for sound quality, usability and interoperability.

The result of this collaborative process is a THX Certified receiver, amplifier or pre-amplifier designed from the ground-up to present your favorite movies, music and other games in 2.1, 5.1 and 7.1 surround sound loud and clear at studio reference volumes.

[Goat1]

Regardless ,Setting everything at 80 hz sounds great.. I think my ipod touch is THX certified

[mreilly611]

Originally Posted by Goat1

Regardless ,Setting everything at 80 hz sounds great.. I think my ipod touch is THX certified

You push audyssey about how great it is. Then you change speakers to 80hz. So any speaker set above 80hz by audyssey and by you coming down to 80hz you are turning off room correction for that speaker. So you are not using room correction on those speakers. So how is Audyssey so great again?

WHAT YOU SHOULD DO AND WHAT YOU SHOULD NOT DO

1. It is ok to increase the crossover frequencies of the speakers as set by Audyssey. It is generally not recommended to lower the crossover frequencies below the numbers set by Audyssey. If you do that, Audyssey will not apply correction filters to the frequencies below the numbers that are set by the auto calibration program.

Many people are hung up on the 80Hz crossover frequency that is suggested by most experts. Although 80Hz crossover frequency works for many speakers, it is not a number that is etched in stone. That number was originally recommended by THX and applies to THX certified speakers that have certain frequency characteristics.

Audyssey does not measure the frequency response of a speaker as it was reported by the manufacturer and supposedly measured in an anechoic chamber. Audyssey measures the performance of the speakers in the room and based on that, it recommends some crossover numbers. Depending on their location, proximity to room boundaries, furniture, wall coverings, position of the microphone, etc., even identical speakers may have different performances in the room.