First Aftermarket Car Audio Project

mrweebelwahbel · 29th January 2010, 03:59 AM

Hey everyone!

I have a APVB-120B loaded enclosure and i am about to buy an amp for it...

Here's the details on the enclosure: 2 2ohm subs, SVC, 750 watts rms(total), 1500 peak, 102 db sensitivity, 28-150 Hz range,

Could someone please tell me which of these two amps will do the job?

Power Acoustik LFA2-1800 (lfa21800) 2-Channel Amps Car Amplifiers Car Audio Car Audio, Video, & GPS Navigation - Sonic Electronix

Or

Power Acoustik LFA2-2200 (lfa22200) 2-Channel Amps Car Amplifiers Car Audio Car Audio, Video, & GPS Navigation - Sonic Electronix

I dont want to spend a lot (As you can see from the brand of subs and amp i chose lol) but i'm afraid the first amp i listed wont cut it.

Thanks in advance

~Skylar

raresvintea · 29th January 2010, 09:41 AM

it is recomanded to buy a class d amp, because what you chosed is in AB class, with less distorsions but it consume more. And another aspect is that those amps can't have those powers on the output. in the descriptions they say that it has 3x25A=75A, at 14.4V 1080W, but the fuses are 20% over rated from the real cosume, and i don't know that in this world somebody release an amp with 100% efficiency...

think twice before buy an amp!

succes

sorry for my english

I Am An Idiot · 29th January 2010, 12:00 PM

Your English is better than a LOT of the people that live here.

mrmondaynight · 29th January 2010, 06:13 PM

Those amps won't do anywhere near rated power

what is your budget?

this would work
DSC1500.1D - MB Quart Monoblock 1500 Watt Discus Series Class D Amplifier

mrweebelwahbel · 2nd February 2010, 05:08 AM

That was the most i can spend... maybe 15 bucks more at the most.

so the second amp wont work?

I seriously cant wait any longer, gotta have some bass!

powerflux · 2nd February 2010, 05:41 AM

"PWM (Pulse Width Modulated) MOSFET power supply and transistor outputs" (first amp)

actually is class D. unless they mean that only the power supply is PWM. but then you could still get some power because the voltage can be stepped up.

mrweebelwahbel · 23rd February 2010, 03:23 AM

well i bought the 2 ch 2200 watt amp along with a sony cdx gt340.

Class D amps are ok but why would i want a 1 ohm setup, that makes the subs sound like poop

Perry Babin · 23rd February 2010, 03:42 AM

There shouldn't be any audible difference at any given impedance that's within the amplifier's rated impedance range (assuming that the amplifier is in good working order).

BP1Fanatic · 24th February 2010, 04:01 AM

Quote:

Originally Posted by raresvintea

it is recomanded to buy a class d amp, because what you chosed is in AB class, with less distorsions but it consume more. And another aspect is that those amps can't have those powers on the output. in the descriptions they say that it has 3x25A=75A, at 14.4V 1080W, but the fuses are 20% over rated from the real cosume, and i don't know that in this world somebody release an amp with 100% efficiency...

think twice before buy an amp!

succes

sorry for my english

Power Acoustik LFA2-2200
RMS Power (4 ohms) 370 watts x 2 channels
RMS Power (2 ohms) 450 watts x 2 channels
RMS Power (1 ohm) N/A
Bridged RMS Power 900 watts x 1 channel
Fuse Rating 25A x 3

Power Acoustik LFA2-1800
RMS Power (4 ohms) 300 watts x 2 channels
RMS Power (2 ohms) 380 watts x 2 channels
RMS Power (1 ohm) N/A
Bridged RMS Power 760 watts x 1 channel
Fuse Rating 30A x 2

mrweebelwahbel · 4th March 2010, 04:14 AM

My installation turned out great!

I will post a bunch of pics in the next few days!

I cant believe how well this setup turned out, these were cheap subs and amp!
$245 for both on ebay

29th January 2010, 03:59 AM	#1
mrweebelwahbel diyAudio Member Join Date: Jan 2010	First Aftermarket Car Audio Project Hey everyone! I have a APVB-120B loaded enclosure and i am about to buy an amp for it... Here's the details on the enclosure: 2 2ohm subs, SVC, 750 watts rms(total), 1500 peak, 102 db sensitivity, 28-150 Hz range, Could someone please tell me which of these two amps will do the job? Power Acoustik LFA2-1800 (lfa21800) 2-Channel Amps Car Amplifiers Car Audio Car Audio, Video, & GPS Navigation - Sonic Electronix Or Power Acoustik LFA2-2200 (lfa22200) 2-Channel Amps Car Amplifiers Car Audio Car Audio, Video, & GPS Navigation - Sonic Electronix I dont want to spend a lot (As you can see from the brand of subs and amp i chose lol) but i'm afraid the first amp i listed wont cut it. Thanks in advance ~Skylar

29th January 2010, 12:00 PM	#3
I Am An Idiot diyAudio Member Join Date: Mar 2007	Your English is better than a LOT of the people that live here. __________________ If it ain't broke Don't fix it

23rd February 2010, 03:42 AM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	There shouldn't be any audible difference at any given impedance that's within the amplifier's rated impedance range (assuming that the amplifier is in good working order). __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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29th January 2010, 09:41 AM	#2
raresvintea diyAudio Member Join Date: Jan 2010	it is recomanded to buy a class d amp, because what you chosed is in AB class, with less distorsions but it consume more. And another aspect is that those amps can't have those powers on the output. in the descriptions they say that it has 3x25A=75A, at 14.4V 1080W, but the fuses are 20% over rated from the real cosume, and i don't know that in this world somebody release an amp with 100% efficiency... think twice before buy an amp! succes sorry for my english

29th January 2010, 06:13 PM	#4
mrmondaynight diyAudio Member Join Date: Jan 2010	Those amps won't do anywhere near rated power what is your budget? this would work DSC1500.1D - MB Quart Monoblock 1500 Watt Discus Series Class D Amplifier

2nd February 2010, 05:08 AM	#5
mrweebelwahbel diyAudio Member Join Date: Jan 2010	That was the most i can spend... maybe 15 bucks more at the most. so the second amp wont work? I seriously cant wait any longer, gotta have some bass!

2nd February 2010, 05:41 AM	#6
powerflux diyAudio Member Join Date: Apr 2008	"PWM (Pulse Width Modulated) MOSFET power supply and transistor outputs" (first amp) actually is class D. unless they mean that only the power supply is PWM. but then you could still get some power because the voltage can be stepped up.

23rd February 2010, 03:23 AM	#7
mrweebelwahbel diyAudio Member Join Date: Jan 2010	well i bought the 2 ch 2200 watt amp along with a sony cdx gt340. Class D amps are ok but why would i want a 1 ohm setup, that makes the subs sound like poop

4th March 2010, 04:14 AM	#10
mrweebelwahbel diyAudio Member Join Date: Jan 2010	My installation turned out great! I will post a bunch of pics in the next few days! I cant believe how well this setup turned out, these were cheap subs and amp! $245 for both on ebay

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