need an amp for 3 jensen xs12’s

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=110541
Printed Date: May 21, 2024 at 11:14 AM

Topic: need an amp for 3 jensen xs12’s

Posted By: mmibumps
Subject: need an amp for 3 jensen xs12’s
Date Posted: January 10, 2009 at 11:45 PM

ok I have an 3 jensen xs12's and need an amp! i got them at work because they where on clearance for 6 bucks a peice there 525 peak and 175 rms need the cheapest amp to run all 3. im a student and I am on a budget. so give me some ideas ppl i know it needs to be 1 ohm stable but im having a hard time finding one here are the specs on the manual for the subs well tell me what you think thanks XS12: Thiele Small Parameters

Nom. Dia. 9.02 in (229 mm)

( Fs )/( Fo ) Hz 36.1 Hz

( Vas ) 3.1 ft3 (89.1 liters)

( Qts )=(Qms x Qes)/(Qms + Qes) 0.92

( Qms ) 9.26

( Qes ) 1.02

( Xmax ) 0.187 in (4.75 mm)

( Pe ) RMS ( Max.) 175W (525 Max.)

( Re ) DC (R) 3.6 Ohm

( Sd ) 78.4 in2 (506cm2)

( Cms ) 0.248 x 10-3 M/N

( Mms ) 2.77 oz (78.43g)

( Bl ) 7.91 Tm

(SPL ) 89 dB, 1W/1M

VC dia. 2" (51mm)

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thanx4thahelpbro

Replies:

Posted By: mmibumps
Date Posted: January 10, 2009 at 11:48 PM

I know jensens are not the best but its ok igot them for 6 dollars and they still bump

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thanx4thahelpbro

Posted By: mmibumps
Date Posted: January 11, 2009 at 9:50 PM

is any1 going to help ! posted_image

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thanx4thahelpbro

Posted By: ccityroadshop
Date Posted: January 11, 2009 at 10:48 PM

not sure how much ur wanting to spend but check out sonicelctrnix.com they have good deals,

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mustang GT convertible with lots of performance mods... Alpine M500 amp with sealed enclosure, 10 inch kappa perfect, clarion cz500 head unit, kicker ks speakers all around

Posted By: aznboi3644
Date Posted: January 11, 2009 at 11:43 PM

qts is extremely high on those...most suiteable for sealed or IB.

Ported they will sound like complete donkey crap unless in a big ported enclosure tuned in the 20s

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Custom Enclosure Design

Posted By: mmibumps
Date Posted: January 13, 2009 at 12:05 AM

would this be a good amp for me good for me its a lanzar vct1200


Number of Channels	1 - Mono
RMS Power (4 ohms)	200 watts x 2 channels
RMS Power (2 ohms)	350 watts x 2 channels
RMS Power (1 ohm)	N/A
Bridged RMS Power	N/A
Total RMS Power Output	N/A
Peak Power Output	1950 watts x 1 channel
Total Peak Power Output	1950 watts
Minimum Impedance Unbridged	2 ohms
Minimum Impedance Bridged	Not Bridgeable ohms
THD at Rated RMS Power	0.01%
Speaker Level Inputs	No
Preamp Outputs	1 pair
Built-in Crossover	Low-pass (LP)
High-Pass Crossover Frequency	N/A
Low-Pass Crossover Frequency	20 - 25,000 Hz
Subsonic Filter	10 - 100 Hz
Signal-to-Noise Ratio	90 dB
Channel Separation	N/A
Bass Boost	0 - 18 dB
Bass/Gain Remote	No
Fan Cooled	No
Fuse Rating	20A x 2

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thanx4thahelpbro

Posted By: aznboi3644
Date Posted: January 13, 2009 at 2:31 AM

No...its cheap crap

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Custom Enclosure Design

Posted By: mmibumps
Date Posted: January 13, 2009 at 10:53 PM

so what can i buy that is cheap to run them all !!! im a student and have lil cash !!! give me some ideas 150 at most wouldnt like to spend more than 100 plus the speakers are cheap

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thanx4thahelpbro

Posted By: aznboi3644
Date Posted: January 14, 2009 at 1:14 AM

what is the impedance of the coils???

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Custom Enclosure Design

Posted By: mmibumps
Date Posted: January 14, 2009 at 11:28 PM

Wiring Option #1 this is how im planing on setting them up if this is what your looking for
posted_image

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thanx4thahelpbro

Posted By: mmibumps
Date Posted: January 15, 2009 at 12:09 AM

power acuostic ps12000d **POWER CLASS D SERIES COMMON FEATURES **Hi Speed Digital Circuitry **Fully Regulated PWM Power Supply **Four Way Protection Circuit **1 Ohm Stable **Bridging Synchronization **Variable Low Pass 50Hz-150Hz **Variable Subsonic Filter 15Hz-40hz **Variable Subwoofer EQ @ 45Hz **Phase Switch 0-180 **Remote Dash Mount Low Level Gain Control With Cable **Frequency Response: 15Hz to 150hz **S/N Ratio: 100 db **THD: 0.5% **System Distress Indicator **Inputs Sensitivity: 200mv-8v **Dual Mono Speaker Output Connectors **Platinum Plated Heavy Duty Power & Speaker Terminals what about this amp?

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thanx4thahelpbro

Posted By: aznboi3644
Date Posted: January 18, 2009 at 11:11 PM

I would find a single channel amp that puts out around 600 watts at 1 ohm

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Custom Enclosure Design

Posted By: mmibumps
Date Posted: January 19, 2009 at 2:02 PM

well i found this for 124.00 what else do you know of or would this be perfect and also do i just hook it up like a nomal amp to get 1 ohm or whats the trick ppl

HIFONICS BRUTUS BXi608 600W Mono Car Amplifier/Amp

BRAND NEW 2008 AMP! 600 WATT! FAST SHIPPING! WARRANTY!

Features:

Type: Mono Block
1-Ohm Power Rating 1x600
2-Ohm Power Rating 1x300
Turn-On Delay/ Mute
Frequency Response @-3dB: 20-250Hz
Damping Factor: >250
Signal To Noise Ratio: > 95 dB
THD + Noise: < 0.1%
Power and Specific Diagnostics LEDs
Protection DC, Short Circuit, Overload
Power Supply - All MOSFET: Full PWM
Power Output Circuit Type: Ultra-Fi MOSFET
Variable Phase Shift
Phase Change in Degrees: 0-+180
Variable Low-Pass 24 dB Octave: 35Hz - 250Hz
Variable Subsonic Filter: 15Hz - 35Hz
Bass EQ: 0-+10 dB
Balanced Inputs
RCA Inputs
RCA Line Outputs
Remote Bass Module Included (Via RJ11 Jack)
Dimensions: 9.84"L x 9.45"W x 2.52"H
1 Year Manufacturer Warranty

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thanx4thahelpbro

Posted By: aznboi3644
Date Posted: January 19, 2009 at 5:30 PM

that amp would work...if you have enough room a 4th order bandpass may work

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Custom Enclosure Design

Posted By: mmibumps
Date Posted: January 19, 2009 at 11:02 PM

ok sounds good would you be interested in helping me with the design i can do the wood work but dont understand the calculaters for a 4th order bp all the infor should be there for it by the way i have an explorer so i probably have the room other wise what esle could i build and how do i get the amp to run at 1 ohm i thought i knew car audio lol guess i dont know doodie lol i can do all the work but just dont understand the math

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thanx4thahelpbro

Posted By: aznboi3644
Date Posted: January 20, 2009 at 1:36 AM

Wiring the subs together would be all of them in parallel if I understand that they are single 4 ohm coils on each

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Custom Enclosure Design

Posted By: mmibumps
Date Posted: January 20, 2009 at 11:05 PM

ya i got all the wiring down for the subs but is there any way i have to wire the amp up or just fuse it to the bat with a 60 amp fuse what I was really wanting you to help me with is the 4th order box im not sure how to use the calculater for it but i can build it i just need the HxWxD demensions . or if you can teach me how to use the box calculaters ,or should i put a new post up in a diff room

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thanx4thahelpbro

Posted By: aznboi3644
Date Posted: January 21, 2009 at 1:44 AM

its your thread...you can say whatever you want.

I doubt you can design a 4th order bandpass...I tried but the specs to this subwoofer lends to to Infinite baffle. Anything else and it will sound like complete crap.

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Custom Enclosure Design