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more power for sub

Old 05-25-2008, 03:07 AM
Thread Starter
Join Date: Dec 2007
Posts: 72
Default more power for sub

hey guys....
i'm thinking of adding more power for my audio. sub in more particular...
any idea what is best done?
and some people say put another sub, other people say put another amplifier...
what would be best?[/align]

my current set up:

my amp is alpine mrp-m200

Alpine MRP-M200 Specifications

1 Channel Operation
Adjustable Crossover (LP)
Bass EQ Circuit
Bass Engine®
Both sides Terminal Layout
Continuously Adjustable Gain Control
Darlington Bi-Polar Outputs
Discrete Pre-Amp Stage
Gold Plated Insert Power Terminals
Gold Plated Power Screw Terminals
Gold Plated RCA Input Connectors
Gold Plated Speaker Screw Terminals
MOSFET Power Supply
No Current Limiting
Noise Elimination Coil
Phase Selector
STAR Circuitry
Solid Copper Bus Bars
Speaker Level Inputs
Subsonic Filter
Top Mounted LED Power Indicator
Tuned Bass EQ

Dividing Network : 50Hz-200Hz LP (18dB/oct)
Dividing Network : Variable 50Hz - 200Hz LP (18dB/oct)
Foot Print (WxHxD)in : 9” x 2-9/32” x 9”
Foot Print (WxHxD)mm : 250mm x 58mm x 230mm
Foot Sink (WxHxD) : 250mm x 58mm x 230mm
Frequency Reponse : 20Hz-200Hz (+0,-3dB)
Heat Sink (WxHxD) : 230mm x 58mm x 230mm
Heat Sink (WxHxD)in : 9” x 2-9/32” x 9”
Heat Sink (WxHxD)mm : 230mm x 58mm x 230mm
Input Impedance : 10k ohm
Input Sensitivity (for rated power) : 0.2 V to 4.0V
Input Sensitivity (for rated power) : 200mV ~ 4.0V
Power Requirements : 14.4V DC (11V to 16V)
Signal to Noise (S/N) : 100dBA (referenced to rated power)
Slew Factor : greater than 5
Speaker Impedance : 4 or 2 ohms (Mono)
Speaker Impedance : 4 or 2 ohms(stereo), 4 ohms(bridged)
Weight : 2.6kg(5lbs. 12oz.)
Weight : 2.8kg(6lbs. 3oz.)
MAX Power (at 14.4V,EIAJ)

Per channel into 2 ohms : 300W x 1
RMS Power (at 12V,20Hz-200Hz)

Per channel into 2 ohms : 150W x 1 (0.3% THD)
Per channel into 4 ohms : 100W x 1 (0.08% THD)
RMS Power (at 14.4V,20Hz-200Hz)

Per channel into 2 ohms : 200W x 1 (0.3% THD)
Per channel into 4 ohms : 150W x 1 (0.08% THD)
RMS Power (at 14.4V,20Hz-20kHz)

Into 2 ohms : 200W x 1 (0.3%)
Per channel into 4 ohms : 150W x 1 (0.08% THD)

my sub is 2X alpine 12 inch sws-1241D

Bumped Backplate
Compound Radius Curve Pole Geometry
Custom High-Strength Basket
Designed and Engineered in the USA
Dual Progressive Nomex® Spiders with Integrated Tinsel Leads with Edge Control
Dual Stacked Magnets
Dual Voice Coil Design
Extra Length Extended Pole
Heat Transfer Plate
Heavy Duty 8ga. Push Terminals
High Excursion 3/4" Santoprene Surround
High Strength Brass Voice Coil Bobbin
Kevlar Reinforced Pulp Cone
Magnetically Optimized Motor Structure (Pat. Pend.)
Oversized Parabolic Dustcap

Diaphragm Material : Kevlar Reinforced Pulp
Magnetic Weight : 64oz.
Mounting Depth (top mount) : 164mm (6-1/2")
Mounting Diameter (top mount) : 274mm (10-3/4")
Recommended Box Types : Sealed/Bandpass
Recommended Sealed Box Volume : 0.8 – 1.5 cu. ft.
Spider Material : Nomex
Voice Coil Diameter : 38mm
Power Handling

Power Handling Capacity (Peak) : 600W
Power Handling Capacity (RMS) : 200W
Thiel Small Parameters

Coil Height (Hvc) : 32.6mm
Cone Area (Sd) : 490.87 sq. cm
D.C.Coil Resistance (Re) : 3.6ohm + 3.6ohm
Electrical Q (Qes) : 0.72
Equivalent Suspension Stiffness (Vas) : 65 liters(2.3cu.ft.)
Free Air Resonance (Fs) : 31Hz
Frequency Response : 26Hz - 1kHz
Gap Height (Hag) : 10mm
Impedance (Nominal) : 4 ohm + 4ohm
Inductance (Le) : 2.89mH at 1kHz (1.09mH at 20kHz)
Linear Excursion (X linear) : 13.5mm
Maximum Excursion (X peak) : 27mm
Mechanical Excursion (Peak-to-Peak) : 42mm
Mechanical Q (Qms) : 8.98
Sensitivity : 89 dB/W/M
Total Loudspeaker Q (Qts) : 0.67

head unit is kenwood dpx-5500m
i cant find anything on this thing.
i got it with the car and i think it's imported from japan as i can't get a local radio station anywhere in oz.

plus another thing... how venerable are subwoovers to shocks?
i recently had a crash and i think the sub took quite a bit of shock from the impact but the casing is not damaged or scratched. i keep it in my trunk. wil the sub and the amp be damaged?
Old 05-25-2008, 03:56 PM
Join Date: Apr 2008
Posts: 95
Default RE: more power for sub

you DEFINITELY need more power, your feeding subs that want 200-600 watts way less than they can handle.... you should buy the amp i have for sale, it's an Alpine MRDM1005 1000 watts rms, with the gain down a little you'll get much better results giving them some nice clean power.
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