2 Shredders = 2 much for 1 DD 9515

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Topic: 2 Shredders = 2 much for 1 DD 9515

I have a 9515 in a 4.0 cu. ft. box with 42 sq. inches of port tuned
to about 36 HZ. At high volumes the 9515 starts to distort (meaning it's bottoming out). My question is can I redesign my enclosure somehow to limit
this bottoming out? Would decreasing or increasing port area
control the excursion better? How about tuning higher or lower? I crave more and more BASS.

sku
Member
Member # 5671

posted

OK, I think I've found the limit on my 9515, 2 shredders.

I have a 9515 in a 4.0 cu. ft. box with 42 sq. inches of port tuned
to about 36 HZ. At high volumes the 9515 starts to distort (meaning it's bottoming out).

My question is can I redesign my enclosure somehow to limit
this bottoming out? Would decreasing or increasing port area
control the excursion better?

How about tuning higher or lower?

I crave more and more BASS.

Posts: 406 | From: Seattle, WA | Registered: Jul 2001 | IP: Logged |

www.respl.comhttp://members.sounddomain.com/clearlyre

ClearlyRE
Senior Member
Member # 7391

posted

I dont know if it would help your bottoming out problem but someone on here does, but you have way too little volume for that sub and way to little port area if you want all out SPL. I think that sub should be able to take those amps if you fix the box.

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Posts: 653 | From: Lima, OH | Registered: Oct 2001 | IP: Logged |

guitar maestro
Member
Member # 3508

posted

i would suggest downloading WinISD Pro....the excursion graph is quite accurate considering this is a freeware program.....input your parameters, box volume, tuning frequency, port dimensions, and input wattage......tons of graphs to analyze output, including excursion graph

Posts: 307 | From: laredo, tx, usa | Registered: Dec 2000 | IP: Logged |

strawberrystorm
New Member
Member # 8495

posted

YOUR USING SHREDDERS!!! They have a 5.0% distortion rating. Thats what your probably hearing.

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Robert

Posts: 33 | From: Washington | Registered: Jan 2002 | IP: Logged |

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Tundra/dbs
Senior Member
Member # 5668

posted

is this for daily driving?
That might be a little much
you might be giving it 3000 or more watts RMS which just might be on the high side.

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Posts: 501 | From: Chino,Ca | Registered: Jul 2001 | IP: Logged |

sku
Member
Member # 5671

posted

Yes, its for daily driving. Thanks for the
tips fellas!!

Posts: 406 | From: Seattle, WA | Registered: Jul 2001 | IP: Logged |

Rybaudio
Senior Member
Member # 2880

posted

You'll probably blow it pretty soon if you are driving it full tilt. I have two D2s on my 9515 for daily driving, and blew it running it full tilt with music. It's just too much power for it for continuous playing. I had a very similar enclosure as well.

Posts: 3961 | From: State College, PA | Registered: Sep 2000 | IP: Logged |

see if that helpsincrease your port length to 24" or lower your port area to 32sq inches and keep your 16" length

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---Member of Team Gates---
Don't knock it, if you know nothing about it.

Iboomalot
Senior Member
Member # 77

posted

drop the tuning to 30hz and drop the gains on the amps 1/4 turn.

see if that helps

increase your port length to 24" or lower your port area to 32sq inches and keep your 16" length

--------------------
---Member of Team Gates---
Don't knock it, if you know nothing about it.

Posts: 3074 | From: Okla USA | Registered: May 1999 | IP: Logged |

quote:

Originally posted by strawberrystorm:
YOUR USING SHREDDERS!!! They have a 5.0% distortion rating. Thats what your probably hearing.

Distortion has nothing to do with blowing drivers.MIX^^^

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nthemix2
Member
Member # 2988

posted

quote:
Originally posted by strawberrystorm:
YOUR USING SHREDDERS!!! They have a 5.0% distortion rating. Thats what your probably hearing.

Distortion has nothing to do with blowing drivers.

MIX^^^

Posts: 359 | From: Bay Area, california | Registered: Oct 2000 | IP: Logged |

quote:

Originally posted by nthemix2:

Distortion has nothing to do with blowing drivers.
MIX^^^

yeah but sku said "I have a 9515 in a 4.0 cu. ft. box with 42 sq. inches of port tuned
to about 36 HZ. At high volumes the 9515 starts to distort (meaning it's bottoming out). " and he made the comment that its prolly the Dirty ass D2's he is hearing...maybe not though?who knows..still too much power for daily driving....

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system under contstruction [Big Grin]

Lightning audio X1.800.4
Lightning Audio X1.1000.1

GOLDBERG
Senior Member
Member # 4877

posted

quote:
Originally posted by nthemix2:

Distortion has nothing to do with blowing drivers.
MIX^^^

yeah but sku said "I have a 9515 in a 4.0 cu. ft. box with 42 sq. inches of port tuned
to about 36 HZ. At high volumes the 9515 starts to distort (meaning it's bottoming out).

" and he made the comment that its prolly the Dirty ass D2's he is hearing...maybe not though?who knows..still too much power for daily driving....

--------------------

system under contstruction [Big Grin]
Lightning audio X1.800.4
Lightning Audio X1.1000.1

Posts: 2635 | From: hilo, HI | Registered: May 2001 | IP: Logged |

jmo-later

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Discount Car Stereo L.L.C.
Kent, Wa 98032 (206)824-5875

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MrFlamboyant
Senior Member
Member # 3866

posted

i think that more port area will provide more resistance to the cone..... 41 square inches is kinda small for such a large sub with that much juice going to it....

jmo

-later

--------------------
- Wes Sowers -
Discount Car Stereo L.L.C.
Kent, Wa 98032 (206)824-5875

http://members.sounddomain.com/mrflamboyant

Posts: 1679 | From: Renton | Registered: Jan 2001 | IP: Logged |

quote:

Originally posted by nthemix2:

Distortion has nothing to do with blowing drivers.
MIX^^^

Have you hit your head,Distortion will melt a coil in the form of heat faster than clean high power.

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spl1
Senior Member
Member # 2889

posted

quote:
Originally posted by nthemix2:

Distortion has nothing to do with blowing drivers.
MIX^^^
Have you hit your head,Distortion will melt a coil in the form of heat faster than clean high power.

Posts: 745 | From: montgomery, Al | Registered: Sep 2000 | IP: Logged |

jimmyo007
Senior Member
Member # 1425

posted

What ohm load are you running the D2's at.

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Posts: 1084 | From: chicago,il | Registered: Apr 2000 | IP: Logged |

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