120db Reading True or False

[walter duque]

I have been wondering if this could be a true reading on my SBL Meter. My front towers are rated at 115db, Sub #1=115 db@50hz, Sub #2+105db@50hz. When I max my sytem out the SBL Meter goes over 120 db (closer to 130db), could that be possible? It is in a small room.

 

[Adam]

What are the conditions for the ratings on your speakers/subs? For example, what power input and what distance?

 

[allargon]

I hope you're wearing ear plugs or something else at anything 80dB and above to protect your ears.

 

[3db]

I hope you're wearing ear plugs or something else at anything 80dB and above to protect your ears.

what was that?? My ears are ringing and i can't hear you.

 

[walter duque]

I hope you're wearing ear plugs or something else at anything 80dB and above to protect your ears.

No earplugs, but I did learn how to read lips.

 

[walter duque]

What are the conditions for the ratings on your speakers/subs? For example, what power input and what distance?

This is the only information I have for now, and that's for the towers.
System Design Three way power tower with compound bass loading

Bass/Midrange (2) ea 8" high flux cast wool carbon with 1.75" VC

Dedictated power to bass sect. 400 W per side.

Tweeter (1) ea 1" silk dome

Frequency Response 25 hz - 20 khz

Crossover Electronc at 100 Hz and 3 pole/ 18 db/oct at 1.8 khz

Impedance8 ohms

Sensitivity/Max Power 92 db@ 1 W/1M; 350 WRMS

Dimensions/Wt42"h x 9.5"w x 11" d / 69 lbs ea.

 

[Adam]

Thanks for the specs, Walter. I don't see any mention of a 115dB rating, though. I'm wondering why you'd say that's what they are rated at. It's geared towards answering your question on those specific speakers, but not towards the general question about measuring/achieving higher output from a set of speakers in a room as compared to what a single speaker is capable of producing. I'll leave that up to more knowledgeable people.

 

[3db]

Thanks for the specs, Walter. I don't see any mention of a 115dB rating, though. I'm wondering why you'd say that's what they are rated at. It's geared towards answering your question on those specific speakers, but not towards the general question about measuring/achieving higher output from a set of speakers in a room as compared to what a single speaker is capable of producing. I'll leave that up to more knowledgeable people.

If the speaker manufacturers are assuming a max spl rating, is that based in an anoechi chamber? If so, I would guess that room reflections and mutilple drivers maybe able to bring the cumulative SPL louder than whats rated for a single speaker. I'm just guessing though.

 

[jamie2112]

Are you measuring A or C weighted?

 

[walter duque]

[

QUOTE=Adam;572022]Thanks for the specs, Walter. I don't see any mention of a 115dB rating, though. I'm wondering why you'd say that's what they are rated at. It's geared towards answering your question on those specific speakers, but not towards the general question about measuring/achieving higher output from a set of speakers in a room as compared to what a single speaker is capable of producing. I'll leave that up to more knowledgeable people.

[/QUOTE]
When I purchased the the dealer said it'll hit 115db. These speakers are rated conservativly. The system is in a small apartment. The 120db and above is with all 7.2 not just the towers and the subs.
The 8.3 Power Tower is our premium self powered "fast response" floor standing speaker system designed to exceed the utmost demands of high end Stereo and Home Theater. Using a dedicated sub bass amplfier for each channel has many advantages that include high current, focused power and enhanced dynamics. Dual high flux,cast 8"Quiet Cone™wool carbon woofers, independently powered by dedicated 400 W sub amplfiers, provide deep and detailed bass response down to 25Hz! Each amplifier has level and low pass controls for precise in room adjustment. A chambered 8" midbass/midrange unit is complemented by dual vent (compound) loading for unequalled mid-bass "speed" and clarity Sonic attributes include enhanced aural cues, superior note to note delineation, precise harmonic balance and effortless presentation. Technical measurements boast reference quality flat response with extremely low distortion, "easy" impedance, clean impulse, and over 110 db of dynamic headroom!

 

[Adam]

Well, if you have multiple sources hitting 115 dB (for example), then yes - your total will be over 115 dB. There's a handy calculator to illustrate this at the link here (there are others, but that one allows up to 10 source inputs).

 

[walter duque]

Well, if you have multiple sources hitting 115 dB (for example), then yes - your total will be over 115 dB. There's a handy calculator to illustrate this at the link here (there are others, but that one allows up to 10 source inputs).

Adam
Great link, so it is possible. Thanks

 

[croseiv]

So how far away from the speakers are you making those measurements? Is this at the listening position?

 

[jamie2112]

A vs C weighting

I am just going to post this for anyone who cares
http://www.noisemeters.com/help/faq/frequency-weighting.asp

 

[Warpdrv]

Everything is all dependent on the room....

If I put all my stuff in a closet, I'll hit 130db.....

I measured my subs (f112 + TC2000) in my bedroom running full out at almost 130db, my mains couldn't keep up with the output of the subs though.

In my great room I can't get those kind of specs, can't say I'm not trying though.... but its close.

 

[walter duque]

I am just going to post this for anyone who cares
http://www.noisemeters.com/help/faq/frequency-weighting.asp

Thanks for that great link, very good information. I am sure getting an education on AH.

 

[Warpdrv]

This is also the reason if you look into car audio the SPL's are ridiculous...

 

[griffinconst]

You had your stereo up to 120db in a small apt.? The neighbors should be out by the end of the month.
I SAID....THE NEIGHBORS SHOULD BE OUT BY THE END OF THE MONTH.
THE NEIGHBORS SHOU....HELLO.

 

[jamie2112]

You had your stereo up to 120db in a small apt.? The neighbors should be out by the end of the month.
I SAID....THE NEIGHBORS SHOULD BE OUT BY THE END OF THE MONTH.
THE NEIGHBORS SHOU....HELLO.

Now thats funny...........

 

[griffinconst]

Now thats funny...........

Holly crap Jamie.....I hope that's the piro part of your stage show and not your house in your picture. Everybody OK?