Mine can't. I have a Velodyne and it bottoms out and sounds like it will tear in half. My sub only goes to 24hz so how deep IS that scene? I'm just curious here. It seems to me that if your sub can pull that off you have a good one.
I'm sub shopping so I'm open to advice. Though I am leaning toward SVS as of now I don't know which model I want now.

My sub can definitely do it (Martin Logan Descent), but my walls sound like they are tearing in half!

No problems here, dual 18s and 4000 watts. ;)

Neighbors don't like it though.:eek:

My Velodyne DPS-10 doesnt like it at all :( I need to hurry up and get me an SVS PB-13 Ultra!

BTW, I think that scene extends down into at least the low teens.:eek:

I actually just bought the DVD. Plan to check it out with my Epik Tower in the next week or so and I will report back!

Any sub can "do it". It's just a matter of at what levels it can do it.

For sure, although if your sub has a HPF or some other protection built in it would depend on your definition of "doing it". It might NOT be able to play all the content regardless of volume/spl.

My A7-350 plays it without chuffing no problem, wife hates it:p

too much stuff rattles in the room especially walls and doors

i even tried leaning against one of the doors that was rattling and it still rattled

Is there a youtube video somewhere with full bandwidth sound of this scene?

I heard its a crappy movie..

The movie is OK at best, but great demo scenes for HT.

Notice the waterfall plot (http://img.photobucket.com/albums/v24/weezR/Waterfall%20SPL/Pulse_ch15_1-1.jpg), very strong 15-20Hz content.:eek:

You guys should feel that scene at over 126 db's, pretty awesome.

You guys should feel that scene at over 126 db's, pretty awesome.

:eek:

too much stuff rattles in the room especially walls and doors

i even tried leaning against one of the doors that was rattling and it still rattled

For door rattles, buy some tape Velcro in a color that matches your trim and cut a couple small strips of the fluffy side and lay it inside the jamb so the door is tight and has a cushion. Keeps my svs from rattling the door to my family room.

suprisingly, my 3.3 does it well...everythng shakes and rattles, even the whole house...wife ran upstairs and said "what the hell!"

You guys should feel that scene at over 126 db's, pretty awesome.

It is intense!

I looped that scene and went outside to hear my neighbor's gutters and downspouts rattling violently.

Nahh, i'd rather use the bus jump scene jumper or my favorite the auto body shop fight scene in minority report., I don't own pulse horror movies arent my thing unless the are over the top and silly.

Quad Tumults and 6Kwatts......pretty low stuff

Kg

I actually thought that scene was kind of underwhelming after the way it was talked up and some of the other really low stuff in the movie. :p I liked the descending bass at the end of the credits and the other random 10hz stuff splattered throughout the movie.

Ricci, you are correct, there are other scenes that are louder and lower but that lab scene is like a sine wave and will make some lesser systems(room dependent) beg for mercy. Also, that scene lasts pretty long as well.

Ya, I think that is what makes that scene so appealing for testing. It is long and the "pulsing" gives a unique effect that we don't often get from the typical explosions or imacts or....

Ricci, you are correct, there are other scenes that are louder and lower but that lab scene is like a sine wave and will make some lesser systems(room dependent) beg for mercy. Also, that scene lasts pretty long as well.

The sine wave thing is what I read was the real problem with this scene rather than what the subs in question are technically capable of.

I think it was the SVS Ultra thread that was talking of how that scene was actually being interpreted as a sine wave by the sub and shutting down as a result (if i recall correctly).

Personally I'd avoid the scene and use other, similarly dramatic scenes in other, better movies.

Does the movies "pulse" come in blu-ray...never heard of the title before today. May have to give it a go with the sv pb13 ultra I just purchased.

The sine wave thing is what I read was the real problem with this scene. Moreso than what the sub should technically be able to handle.

Sine waves are much harder on subs than program material and that scene was recorded similar to a sine wave sweep of 15-20 hz. If your sub can handle sine waves then that scene will be no problem(at those frequencies).

Nahh, i'd rather use the bus jump scene jumper or my favorite the auto body shop fight scene in minority report., I don't own pulse horror movies arent my thing unless the are over the top and silly.


Hmm what scene exactly is that, do you mean the assembly line scene #9?

They fire off the pulse guns a few times while cruise jumps over barrels and stuff?

Just queued it up and scene was kinda meh at low levels...(wife on the phone...heh).....

Does the movies "pulse" come in blu-ray...never heard of the title before today.

That movie was released during the format war when they only released the better titles. It was not exactly a block buster. So, it may not be released on Blu-ray unlike most movies now.

Remind me, that if I ever produce/direct a crappy movie, to have my sound mixer put in crazy high levels of bass that will give all commercial subs trouble. That way, I could assure myself getting press on a movie that is undeserved. :D

Remind me, that if I ever produce/direct a crappy movie, to have my sound mixer put in crazy high levels of bass that will give all commercial subs trouble. That way, I could assure myself getting press on a movie that is undeserved. :D

It is very amusing how forums like this one with bass heads have given some of the more pathetic titles somewhat of a cult status for nothing other than there LFE content.:D

Yes, it is amusing since that film has little other redeeming value. Ironically, there is also a Pulse II and a Pulse III. They have 0 redeeming value since they don't even have the bitchin' bass track like the first one.

Ricci, you are correct, there are other scenes that are louder and lower but that lab scene is like a sine wave and will make some lesser systems(room dependent) beg for mercy. Also, that scene lasts pretty long as well.

Yeah I guess you are right. I must've burnt myself out with all of those sine wave THD and compression tests I did last year.:)

I've never seen the movie. Other than the bass, I haven't heard anything at all good about it. Has anyone tested it with a single MFW-15, and if so, can it handle the scene?

I've never seen the movie. Other than the bass, I haven't heard anything at all good about it. Has anyone tested it with a single MFW-15, and if so, can it handle the scene?

Of course, it can handle it. It depends on your environment and desired SPL.

Of course, it can handle it. It depends on your environment and desired SPL.

Gotcha. Thanks. I might have to check it out just for that scene.

Yes, it is amusing since that film has little other redeeming value. Ironically, there is also a Pulse II and a Pulse III. They have 0 redeeming value since they don't even have the bitchin' bass track like the first one.


So sad. Some people have more subwoofage than anyone needs, yet they "watch" content that is so poor that is not worth playing except to demo loud and deep bass. May as well play test tones.

I just watched El Cid. Good movie, nice audio track yet no deep bass exists in the movie.

Nahh, i'd rather use the bus jump scene jumper or my favorite the auto body shop fight scene in minority report., I don't own pulse horror movies arent my thing unless the are over the top and silly.

I know I should have gone to the famous Empire Leicester Square to see (Jumper 2008) for the 56KW JBL THX experience!

http://i282.photobucket.com/albums/kk279/SpectrumsubbassLFE13417/JumperfrequcywaterfallsubbassLCRSDV.jpg

Pulse was load of rubbish. Strange only played that silly moment only last week along with Cloverfield silly moments I really dislike that film for its cinemaphotography worst film of the decade. Yeah my sub can handle it YES I’M SURE!

Sine waves are much harder on subs than program material and that scene was recorded similar to a sine wave sweep of 15-20 hz. If your sub can handle sine waves then that scene will be no problem(at those frequencies).

Agree but don’t get too overconfident you might end up busting it in and its safer to add more subs of the same make and model and stack them up front for (mutual coupling) will give you twice the cone area twice the SPL and extend the low end down further as well.

Gotcha. Thanks. I might have to check it out just for that scene.

It just might not handle it at reference levels in your room....

Agree but don’t get too overconfident you might end up busting it in and its safer to add more subs of the same make and model and stack them up front for (mutual coupling) will give you twice the cone area twice the SPL and extend the low end down further as well.

Actually SPL doesn't double when you add a second subwoofer. Yes there is double the cone area, but the addition of more speakers is a logarithmic function, and not a simple addition and subtraction issue. If that was the case then it would be easy to get to 130db and in a home it's definitely not :D

Hate to disagree but the SPL does go up around a 3db increase the this also helps for smoothing out little nasty buggers like room nodes by carefully staking them up front to radiate a uniform frequency response with less gaps in the frequency response.

The level will go up and the less power is needed to produce a comfortable lightening level where it can please everyone not bust there ears in with too much over long periods.

Also independent EQ for each sub as each sub will be in different space and would require independent EQ to tailor the dips and peaks or rather use cuts for the peaks.

I’d be looking for smooth possible response with less gaps and uniform coverage over the seating area and then with master sub volume fader I can reduce or increase for different films. Pulse requires less because that type of low end will damage most subs if used carelessly. Less is more, you don’t want to overwhelm the rest of the soundtrack by masking softer tones with silly heavy amounts of 20Hz content!

Hate to disagree but the SPL does go up around a 3db increase the this also helps for smoothing out little nasty buggers like room nodes by carefully staking them up front to radiate a uniform frequency response with less gaps in the frequency response.

The level will go up and the less power is needed to produce a comfortable lightening level where it can please everyone not bust there ears in with too much over long periods.

Also independent EQ for each sub as each sub will be in different space and would require independent EQ to tailor the dips and peaks or rather use cuts for the peaks.

I’d be looking for smooth possible response with less gaps and uniform coverage over the seating area and then with master sub volume fader I can reduce or increase for different films. Pulse requires less because that type of low end will damage most subs if used carelessly. Less is more, you don’t want to overwhelm the rest of the soundtrack by masking softer tones with silly heavy amounts of 20Hz content!

What happened to Sooty?

What happened to Sooty?

The little curious cat got too overconfident and took clumsy leap off the TV onto the hard floor and broke his right leg and slight minor injury to his pelvis. He’s had surgical operation two days ago and he’ll be spending another night in at the pet hospital. Poor kitten.:(

The little curious cat got too overconfident and took clumsy leap off the TV onto the hard floor and broke his right leg and slight minor injury to his pelvis. He’s had surgical operation two days ago and he’ll be spending another night in at the pet hospital. Poor kitten.:(

Bummer! I hope he makes a full recovery.

Bummer! I hope he makes a full recovery.

He’ll have to be placed in cage for at least 5 weeks at best or until he has made a full recovery that the vet is satisfied. I’m going to feel rather down seeing him liming around. So I guess second x-ray would be done to see how the leg as improved before the pins are taken out I guess?

Thanks for your concern and wellbeing for my cat, the nights have been chilly and lonely without his warm affection.:(

He’ll have to be placed in cage for at least 5 weeks at best or until he has made a full recovery that the vet is satisfied. I’m going to feel rather down seeing him liming around. So I guess second x-ray would be done to see how the leg as improved before the pins are taken out I guess?

Thanks for your concern and wellbeing for my cat, the nights have been chilly and lonely without his warm affection.:(

Holy cow! 5 weeks! Man, that will be a tough road for a kitty.:o

Hate to disagree but the SPL does go up around a 3db increase

What do you mean disagree? You're agreeing with me that SPL doesn't double. If it doubled then if one subwoofer put out 115 db, 2 would put out 230 db and that simply isn't the case :D

Also your "3db increase" depends upon location. If you colocate 2 subwoofers you will get closer to a 6db increase, whereas if the speakers are on opposite sides of the room the increase will be closer to 3db. This increase will start to decrease the more subwoofers you add, but those would be realistic numbers if you went from 1 subwoofer to 2.

For example, if you went from 1 to 10 you would not increase 30db total. You would probably increase 3db for subwoofer number 2, and then maybe another 2 db with subwoofer number 3, and that number will gradually shrink the more you add.

-Chad

Because the scale is logarithmic, volume doubling is cosidered to be +10db. In other words, +10 db "sounds" like twice as loud. Going to a second sub obviously does not not do that. It's +6 db at best with co-location.

What do you mean disagree? You're agreeing with me that SPL doesn't double. If it doubled then if one subwoofer put out 115 db, 2 would put out 230 db and that simply isn't the case :D

Also your "3db increase" depends upon location. If you colocate 2 subwoofers you will get closer to a 6db increase, whereas if the speakers are on opposite sides of the room the increase will be closer to 3db. This increase will start to decrease the more subwoofers you add, but those would be realistic numbers if you went from 1 subwoofer to 2.

For example, if you went from 1 to 10 you would not increase 30db total. You would probably increase 3db for subwoofer number 2, and then maybe another 2 db with subwoofer number 3, and that number will gradually shrink the more you add.

-Chad


Are you taking the piss? LOL Two subs or speakers doesn’t double by 89db + 89db = 178db I’d end up going stone deaf!:D

It’s doubled by +3db each time. I have two subs an diy JBL 4645 18” and Eltax A12-R 12” if I played sine wave of 50Hz for argument sakes from each and adjusted the SPL for each then added the two the level increases by +3db.

Then I’ll reduce the level of both back down to comfortable level. I don’t have much room for stacks of subs up front at best I could get away with two or three more JBL 4645C types since the 4645 is discontinued and place them in an upright position.

Of course its going to look damn ugly unless the front was covered off with some black material to hang around the CRT SONY so only the screen would be visible. Or video LCD projector is the next best step forwards.

Yes I know about the boundary effect of three corners I wasn’t born yesterday. 9db at best in the corner and that may do fine for a few frequencies to fill in those nasty gaps in the frequency response but will require a few bands to be reduced.

The second smallest sub is only used for LCRS sub bass extension not the LFE.1 the LFE.1 is sent off to the JBL. The smaller one is presently placed at 59” off the floor stacked onto disused tower speaker.

This helps to give better response from the few frequency sweeps I ran. Also its not too far off from the left-hand corner about 35”.

Anyway Pulse doesn’t give me any issues and should one occur I’d turn down the level and practice common sense rather than pushing it to the breaking point. So I’m confident it can handle most of the old films from yesterday today’s films suck without decent enough story just for sakes LFE.1.

I’ve got this figured out and the way I’d tackle it is with multiple parametric EQ for each sub to achieve the smoothest possible frequency coverage but as of now its like most here they think they have great low end wow factor? The few that have multiple subs I wonder if they are using multiple parametric EQ because one of few of the stacks maybe producing more or less, oh, this can drive you bonkers do this.

Because the scale is logarithmic, volume doubling is cosidered to be +10db. In other words, +10 db "sounds" like twice as loud. Going to a second sub obviously does not not do that. It's +6 db at best with co-location.

I don’t see this when adding another signal or sine wave and looking at it on the RTA inside rather than sound travelling around the room airborne. The signal or the Pulse of the sine wave goes up by +3db.

They should make a film called Sine Wave or Pulse meets Sine Wave the Final Conclusion.:D

It has nothing to do with adding another signal. It has to do with adding a second driver for twice the displacement and a second amp for doubling the power and the way the two subs acoustically couple together. The net result is +6db.

Because the scale is logarithmic, volume doubling is cosidered to be +10db. In other words, +10 db "sounds" like twice as loud. Going to a second sub obviously does not not do that. It's +6 db at best with co-location.

While adding a second subwoofer doesn't create the "perception" of twice as loud, the 6dB increase of a second co-located subwoofer does technically result in a doubling of acoustic output, doesn't it? Not sure what the original question of "doubling" was asking - a perceived "twice as loud" or what.

Because the scale is logarithmic, volume doubling is cosidered to be +10db. In other words, +10 db "sounds" like twice as loud. Going to a second sub obviously does not not do that. It's +6 db at best with co-location.


You are correct. 10 dB is double the volume. You need to double the power sent to the speaker to gain 3 dB in volume.

I have measured my subwoofers, and I do gain 6 dB when I double the number of drivers connected to a single amplifier when speakers are co-located in a corner.

Separate the drivers, and the gain varies from 3 to 6 dB depending on distance between the drivers.

Right, +6db takes double the power and drivers. Either or is a +3 increase, all other things being equal, colocation.

It has nothing to do with adding another signal. It has to do with adding a second driver for twice the displacement and a second amp for doubling the power and the way the two subs acoustically couple together. The net result is +6db.

That is stated in the JBL cinema manual that I have placed in front of me.

I think I’d settle for academy award winner for best sound effects (Master and Commander 2003) cannon recoil thunders with blast! Oh the Oscars® are not far off now are they I wonder what the nominees for best sound and sound effects editing categories is going to be for last years blockbusters?;)

Are you taking the piss? LOL Two subs or speakers doesn’t double by 89db + 89db = 178db I’d end up going stone deaf!:D

It’s doubled by +3db each time. I have two subs an diy JBL 4645 18” and Eltax A12-R 12” if I played sine wave of 50Hz for argument sakes from each and adjusted the SPL for each then added the two the level increases by +3db.

Then I’ll reduce the level of both back down to comfortable level. I don’t have much room for stacks of subs up front at best I could get away with two or three more JBL 4645C types since the 4645 is discontinued and place them in an upright position.

Of course its going to look damn ugly unless the front was covered off with some black material to hang around the CRT SONY so only the screen would be visible. Or video LCD projector is the next best step forwards.

Yes I know about the boundary effect of three corners I wasn’t born yesterday. 9db at best in the corner and that may do fine for a few frequencies to fill in those nasty gaps in the frequency response but will require a few bands to be reduced.

The second smallest sub is only used for LCRS sub bass extension not the LFE.1 the LFE.1 is sent off to the JBL. The smaller one is presently placed at 59” off the floor stacked onto disused tower speaker.

This helps to give better response from the few frequency sweeps I ran. Also its not too far off from the left-hand corner about 35”.

Anyway Pulse doesn’t give me any issues and should one occur I’d turn down the level and practice common sense rather than pushing it to the breaking point. So I’m confident it can handle most of the old films from yesterday today’s films suck without decent enough story just for sakes LFE.1.

I’ve got this figured out and the way I’d tackle it is with multiple parametric EQ for each sub to achieve the smoothest possible frequency coverage but as of now its like most here they think they have great low end wow factor? The few that have multiple subs I wonder if they are using multiple parametric EQ because one of few of the stacks maybe producing more or less, oh, this can drive you bonkers do this.

hey JBL, sorry about Sooty :(

about a year ago i had 4 of my sealed subs all stacked in the same corner (2 on top of 2)

i turned 1 sub on and played a 40hz sine wave and got out the radio shack digital SPL meter, turned on the 2nd sub and got +6db increase, turned on the 3rd sub and got +3db, turned on the 4th sub and got another +3db

so 1 sub added +6db and it took 2 more subs to get another +6db

It just might not handle it at reference levels in your room....

Understood. I may or may not check it out. I hate to tie up a Netflix rental with a movie I know is otherwise trash just to check out one bass scene. There are plenty of other good movies out there for bass.

hey JBL, sorry about Sooty :(

about a year ago i had 4 of my sealed subs all stacked in the same corner (2 on top of 2)

i turned 1 sub on and played a 40hz sine wave and got out the radio shack digital SPL meter, turned on the 2nd sub and got +6db increase, turned on the 3rd sub and got +3db, turned on the 4th sub and got another +3db

so 1 sub added +6db and it took 2 more subs to get another +6db

Thank you mate, I truly appreciate it, I’ll let Sooty, know you said hi, when I hopefully pick up tomorrow.:)

Subs! Yeah but what about the other tones in the low end resistor they might well be producing greater levels. I take it you’ve got no parametric EQ like BFQ2496 and its cheap as they come if you Google Product Search for your region for possible lowest price.

Studiospares here in the UK is doing it at nutty low price £86.0 and for parametric EQ wow I’d buy a second a third a fourth a sixth and so on.

But I need more of the same I can’t really get away with mix-n-matching different subs.

Anyway got to finish the cooking!


Oh, did you remember to reduce the level back down afterwards for 75db.

I bet you notice the difference while turn each off the impact getting less and less. Oh, no let’s just have them all turned ON bugger the power station.:D

Play 60Hz sine wave to replicate the power station buzz!:D
Or in our county we would replicate with the 50Hz sine wave!:D

Understood. I may or may not check it out. I hate to tie up a Netflix rental with a movie I know is otherwise trash just to check out one bass scene. There are plenty of other good movies out there for bass.

Ya, I know what you mean. Although, it is a watchable movie, unlike some horror flicks or even movies in general. It is just far from being considered an instant classic. Who know's you may even like, some people do.

I ran a battery of frequency sweeps last Sunday testing out the back part of the room to at various spots or tiles that are placed on the floor at 9” square?

I placed masking tape on the floor to mark out how many tiles across the width haven’t done the rest of the room as of yet it would take hours literally!

Here are the frequency sweeps of the main sub JBL.

From left to right rear of the room facing forwards tile 1, 2, 3, 4 and 5.

1
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130424&stc=1&d=1232477651

2
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130425&stc=1&d=1232477651

3
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130426&stc=1&d=1232477651

4
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130427&stc=1&d=1232477651

5
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130428&stc=1&d=1232477651

From left to right rear of the room facing forwards tile 6, 7, 8, 9 and 10.

6
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130429&stc=1&d=1232478131

7
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130430&stc=1&d=1232478131

8
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130431&stc=1&d=1232478131

9
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130433&stc=1&d=1232478131

And finally the last few with the ECM8000 placed not too far of from the right-hand corner.

From left to right rear of the room facing forwards tile 10, 11 and 12.

10
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130434&stc=1&d=1232478613

11
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130435&stc=1&d=1232478613

12
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=130436&stc=1&d=1232478613

Now if had to gone and repeat that with the sub in different position and its damn heavy to move around this whole thing could take days doing it alone, now then.

What I’d like to do also is multiplex microphone with several ECM8000 placed around the room patched into microphone mixing consul. This will reduce time by great factor of hours. ECM8000 is cheap as biscuits.

Explain this one, I wanted to see how much gain I was getting with each addition of a sub. The first sub registered 61 db's(-17 on sub out trim)(range is -20 to +20), second sub was 67 db's. These were 2 front subs on opposite sides(bottom subs). Then I connected another sub in front and reached 70 db's. The next and last front sub went to 73 db's. Then I started to add my rear subs and the first one raised it to 75 db's, then the next to 77 db's, the next one was 80 db's, and then the last one made it 82 db's. So I gained 21 db's from adding 8 subs. I think it has to do with room gain, so don't count that out when adding subs.

JBL, I am not over confident at all. I do know this, my ears will fail before any of my equipment. I do not recommend using sine waves for anyone at high levels.

Explain this one, I wanted to see how much gain I was getting with each addition of a sub. The first sub registered 61 db's(-17 on sub out trim)(range is -20 to +20), second sub was 67 db's. These were 2 front subs on opposite sides(bottom subs). Then I connected another sub in front and reached 70 db's. The next and last front sub went to 73 db's. Then I started to add my rear subs and the first one raised it to 75 db's, then the next to 77 db's, the next one was 80 db's, and then the last one made it 82 db's. So I gained 21 db's from adding 8 subs. I think it has to do with room gain, so don't count that out when adding subs.

JBL, I am not over confident at all. I do know this, my ears will fail before any of my equipment. I do not recommend using sine waves for anyone at high levels.

I would high recommend ear plugs when mucking around with sine waves at high levels, your ears will buzz and you feel rather down afterwards it’s not cool at all.

Maybe one of the subs is aiming for the furthest distance in the room.
What is the shortest distance directly front to back!
What is the longest distance corner to corner diagonally!

Also I haven’t seen a full image of the room? Take some fresh pictures please of from the back of the room get as much in the frame and snap it! Then move over to the other side and snap it.

Look at those snappers! :D
Romancing the Stone

Then snap the front of the and then the sides get as much snaps as possible even if you have laundry hanging up on the door get that as well.

My room isn't perfect these buildings where built in the 1950’s and acoustically design wasn’t implemented into the design because they never figured that in 50 years time Dolby six-track digital would be household name making the TV in the corner obsolete overnight, with large speakers taking over from 2” TV speakers.

I have sodden chimney beast in the room that thing makes for new challenges to work around and I’ve got 90% of it figured out as and when I get the time to buy the building materials and knock up false wall alongside part of the wall to make the far left side even, I don’t know when?

The little curious cat got too overconfident and took clumsy leap off the TV onto the hard floor and broke his right leg and slight minor injury to his pelvis. He’s had surgical operation two days ago and he’ll be spending another night in at the pet hospital. Poor kitten.:(

My cat (when he was younger) fell 11 feet from a walkway in our house TWICE and walked (actually limped a little) away unharmed. Not the sharpest pencil that cat.

My cat (when he was younger) fell 11 feet from a walkway in our house TWICE and walked (actually limped a little) away unharmed. Not the sharpest pencil that cat.

Bugger :eek: I guess he’s knocked a few lives off his 9. :D Whew close call. How old is the cat?

One thing I’ve noticed is that I’ve doing other things with the microphone preamplifier, so therefore I can’t remember the settings I had it set at last Sunday?

Things. :D
Enemy Mine

hey JBL, sorry about Sooty :(

about a year ago i had 4 of my sealed subs all stacked in the same corner (2 on top of 2)

i turned 1 sub on and played a 40hz sine wave and got out the radio shack digital SPL meter, turned on the 2nd sub and got +6db increase, turned on the 3rd sub and got +3db, turned on the 4th sub and got another +3db

so 1 sub added +6db and it took 2 more subs to get another +6db


Yup, each time you double the number of speakers you gain 6 dB. I stopped at 4 drivers myself.

2 X 1 driver = 2 drivers for 6 dB of gain

2 x 2 drivers = 4 drivers for 12 dB of gain

2 x 4 drivers = 8 drivers for 18 dB of gain