J2FRESH

iTrader: (8)

Powerbass B-series 12" subwoofer, 250W (rms), Dual 4 Ohm VC


Basic Features
# Backplate: Bumped and Dip Cut Back Plate
# 12 inch woofer with black cosmetics
# 50 oz magnet
# Advanced Polyproplene Cone
# Black Top and Back Plate
# Customized Rubber Boot
# Oversized Control Surround Design (CSD)
# Rigid Black Frames
# Pole piece: Vented Pole Pieces
# Spectrum Analyzer: Progressive Flat Spiders
# Voice Coil: Dual 4ohm VC
# Voice Coil: Multi-Layered Voice Coils
Specifications
# FS= 29.8HZ
# QTS=0.78
# VAS=118.9Hz
# Frequency Response: 30 Hz - 1 KHz
# Peak Power (Maximum): 350 Watts Peak
# RMS (Continuous) Power: 250 Watts
# Sensitivity: 87dB @ 1W/1M

I have 2 subs and now need a amp to power them.
I do NOT know how to calculate the rms and peak to get the answer i need.
All i know is the guy i got these from said he used a 1000 watt 2ch amp and
since he didnt know what was the info the subs i did some research and found
the above info so i just want to make sure i dont under/over power them
What size amp is recommended to push these?

thanks

Ricksi30

What is your budget? You're going to want an amp that does 500 watts RMS at 1 ohm or 4 ohm. Do not pay attention to peak ratings as they don't matter, RMS is all that matters.

locknuts27

iTrader: (2)

Your spec 250 watts is per coil, so your single sub require 500 watts when using both coils, times that by 2 and you will need 1000 watt true rms amp to push the subs. You might also think about upgrading alternator as well unless you already done so???

Ricksi30

HaHa NO????

gtmustang89

Listen to Ricksi......you dont need a 1000w rms amp, 500w rsm will do plenty. you can always get a 4channel amp and bridge two of the channels for a little more power or just go with a nice mono block class d amp and run them together it all depends on the sound that you want.....

locknuts27

iTrader: (2)

So his speakers aren't 250 watts per coil?

Ricksi30

Unless I'm missing something there is no way in hell that those are rated at 500rms, and absolutely no need for a higher output alternator with 1000 RMS.

locknuts27

iTrader: (2)

I am running 800 watt amp for my Alpine Type R 12, dual 4 ohm vc and when I have my volume turned up my lights does dim. Am thinking about adding a Cap to see if that will help with the dimming! In theory it should?!

I guess those speakers could be 125 watts rms per coil? I was thinking that they were 250 coil thus my suggestion for 1000 watt rms amp.... If he does go 1 ohm amp I say look for old school Orion HCCA amps!

Ricksi30

Don't add a capacitor, upgrade your big 3. Also what gauge ground and power wire are you using? A choked electrical system using wires that are too small is going to dim.

locknuts27

iTrader: (2)

Using 4 guage for ground and for power!

I hear alot of peeps saying not to use a cap, why is that? From my electronics background cap is a good thing! So I thought! lol

Ricksi30

Do the big three for sure. If your alternator isn't making enough to power your amp adding another component that needs to be charged can actually strain the electrical even more, very few applications can benefit from a cap in a car. Right now I'm running ~2200 Rms on a stock alternator (Not a good idea if you like your alt) waiting on a 250 amp replacement. But even at this high wattage dimming is minimal. I have ALL 0 gauge wire. I have run 1300 Rms with no dimming at all.

locknuts27

iTrader: (2)

Holy crap 2200 rms amp? WTF? What amp?

Dimming is minimal but you can notice it. I am running Memphis amp, it is better than the JL Audio 800 watt amp I had.

Ricksi30

Cadence zrs 9 and a cadence zrs 4. http://forums.maxima.org/audio-elect...ild-3-10s.html

locknuts27

iTrader: (2)

I saw that thread! Very nicely done bro!

Ricksi30

Thanks man it slams and sounds great. Just need the new alternator another 10 and more powa!

J2FRESH

iTrader: (8)

damn sorry i almost forgot i started this thread lol thanks for the responses fellas. well budget wise i been lookin on craigslist for a used amp under $150 lol since i picked up the box and 2 12's for $100 later ill upgrade but for now this will work for me but if new i'd say $300 max. but i want the full potential i can get out of these subs thanks

i found a used kenwood kac-9103d for $80 will this work specs below

mono subwoofer amplifier
500 watts RMS x 1 at 4 ohms (900 watts x 1 at 2 ohms)
1-ohm stable (no power ratings available)
CEA-2006 compliant
variable low-pass filter (50-200 Hz at 24 dB per octave)
bass boost (0-18 dB at 40 Hz )
subsonic filter (15/25 Hz, 18 dB/octave )
top-mounted controls
Class D design
speaker- and preamp-level inputs
preamp outputs
fuse rating: 30A x 2
4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
14-7/8"W x 2-9/16"H x 11-1/2"D
warranty: 1 year

nismo2010

According to these specs, this amp should be fine.

locknuts27

iTrader: (2)

I am thinking about doing something different with my set up but just don't know what yet?!?!

Ricksi30

Haha yeah I hear ya. This is my fourth set up in this car, I see this one being the last one for the I30. I am very impressed with these subs for what they cost.

locknuts27

iTrader: (2)

Are you running the subs in parallel?

I would like to run two 10s in a sealed enclosure...

J2FRESH

iTrader: (8)

ok found some more amps according to the specs of the subs im using which amp below is best for it a 2-channel or mono the SONY & KICKER are mono and KENWOOD& LANZAR are 2 channel?

SEE SPECS BELOW

SONY XPLOD
1600W max power
500W x 1 into 4 ohm, 20Hz - 300Hz, @ 0.2% THD
900W x 1 into 2 ohm, 20Hz - 300Hz, @ 0.6 THD
Class D
Variable 50 - 300Hz 12dB/oct Low Pass Filter
40Hz EQ Boost
RCA and Speaker Level Inputs

Kenwood mono subwoofer amplifier
300 watts RMS x 1 at 4 ohms (500 watts x 1 at 2 ohms)
CEA-2006 compliant
variable low-pass filter (50-200 Hz at 24 dB per octave)
bass boost (0-18 dB at 40 Hz )
subsonic filter (15/25 Hz, 18 dB/octave )
Class D design
speaker- and preamp-level inputs
preamp outputs
fuse rating: 40A x 1
8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
12-7/16"W x 2-1/2"H x 11-11/16"D
warranty: 1 year

Kicker KX600.1
Power Specifications - Full Range Channels
RMS Power @ 4 ohms 300 watts x 1 channel
RMS Power @ 2 ohms 600 watts x 1 channel
RMS Power @ 1 ohm Not Stable
Bridged RMS Power Not Bridgeable
Peak Power Output N/A
Amplifier Specifications
Number of Channels 1 - Mono
Total RMS Power Output 600 watts
Minimum Impedance Unbridged 2 ohms
Minimum Impedance Bridged Not Bridgeable ohms
THD at Rated RMS Power 0.5%
Speaker Level Inputs Yes
Preamp Outputs 1 pair
Built-in Crossover N/A
High-Pass Crossover Frequency N/A
Low-Pass Crossover Frequency 50 - 200 Hz
Subsonic Filter N/A
Signal-to-Noise Ratio 95 dB
Channel Separation N/A
Bass Boost 0 - 18 dB (40 Hz)
Bass/Gain Remote Yes
Fan Cooled Yes
Fuse Rating 30A x 2

Lanzar VCT2110
Number Of Channels: 2
Maximum Power: 1000 Watts
Low Frequency response: 15 Hz
High Frequency Response: 30000 Hz
Built In Crossovers: Yes
Channel Separation: Yes

500W x 2 Output @ 2 Ohms
1000W x 1 Bridged Output @ 4 Ohms
General Features
2 Ohm Stable
MOSFET Power Supply
Variable Hi-Pass :40 Hz-250 Hz
Variable Low-Pass : 40 Hz-250 Hz
Variable Input Level (Gain) Control : 6V-200mV
Bass Boost Selector : 0/+18dB
Thermal / Overload / Short Circuit Protection
Soft Turn On/Off
Power & Protection LED Indicator
Low Level RCA Input: 10K Ohms
Line Level RCA Output
Frequency Response : 15 Hz-30K Hz
Signal to Noise Ratio: >95dB
THD:0.1 %
2x30 Amp Maxi Type Fuse
Slim Size Amplifier Design For Easy Installation
Dimensions: 10.63''W x1.75''H x 9

Ricksi30

Voice coils wired in series, speakers wired in parallel for a load of 1.34.


J2FRESH: Take a look at this cadence. http://www.woofersetc.com/p-6027-zrs...amplifier.aspx Wire your subs to 4ohm and bridge the amp to get 500 rms.

J2FRESH

iTrader: (8)

thanks

1st or 2nd pic

so wire them like this

or this

locknuts27

iTrader: (2)

I would have to say second pic for maximum amp out put! Too bad you don't have one ohm stable amp....

locknuts27

iTrader: (2)

3 Ohm subs?

Ricksi30

No dual 2.

J2FRESH

iTrader: (8)

i didnt buy a amp yet

locknuts27

iTrader: (2)

That's awesome man!

locknuts27

iTrader: (2)

1 ohm amp would be ideal but 2 ohm amps works pretty great!
I like the specs on Kicker and Lanzar amps but I am sure they all will push your subs pretty well!

J2FRESH

iTrader: (8)

oh ok cool thanks man i appreciate it, i was leaning towards the lanzar since it was cheaper than the rest and new thanks again

Robert_J

Audiopipe APSM-1300 - $120 new, shipped to your door from a dozen different places. Google it and read what everyone is saying. It does the rated 1,000w RMS into 1 ohm.