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<blockquote data-quote="blazergt" data-source="post: 4708047" data-attributes="member: 595772">I am fairley new to all this and have a few questions.&nbsp; First off this is whats in my car right now.Head unit - Alpine CDA-9847Built-In Power Amplifier&nbsp; &nbsp; &nbsp; &nbsp; YesBuilt-In Amplifier RMS Power&nbsp; &nbsp;&nbsp; 4 x 18 Watts RMSBuilt-In Amplifier Power&nbsp; &nbsp;&nbsp; 4 x 50 WattSpeakers -**Front - Alpine SPR-17CInterface Connection:&nbsp; &nbsp;&nbsp; Male Quick Disconnect TerminalOverall Max Frequency Response:&nbsp; &nbsp;&nbsp; 27 kHzSensitivity:&nbsp; &nbsp;&nbsp; 87 dBSpeaker Configuration:&nbsp; &nbsp;&nbsp; Midwoofer and Tweeter ComboMaximum Input Power Rating:&nbsp; &nbsp;&nbsp; 300 W/channelOverall Min Frequency Response:&nbsp; &nbsp;&nbsp; 67 HzType of Speaker:&nbsp; &nbsp;&nbsp; Multi-Element-- 2-WayNominal Input Power Rating:&nbsp; &nbsp;&nbsp; 100 W/channelNominal Impedance:&nbsp; &nbsp;&nbsp; 4 ohm(s)**Rear - Alpine sps-500Sensitivity-87dB /W(1m)Impedence-3.6 OhmsFrequency Response-80Hz - 22kHzPower Handling Capacity (Peak)-170 WattsPower Handling Capacity (RMS)-55 WattsCEA-2031 Power Rating-55 WattsSubwoofer (2)-2 - 10w3v2-d4Dual Voice Coil YesImpedance 4 ohmsPeak Power Handling 600 watts approx.RMS Power Handling 300 watts* I took an ohm reading and for each sub (Wired into the box) reads about 7.2, dont know what that means lolAmp for sub-Rockford Fosgate - p6001Amplifier Class:&nbsp; &nbsp;&nbsp; ABNumber of Channels:&nbsp; &nbsp;&nbsp; 2Min Frequency Response: 20 HzMax Frequency Response: 20 KHzBridgeable: BridgeableSignal To Noise Ratio: 80 dbFuse Rating:2x40 AMPSWire Gauge:&nbsp; &nbsp;&nbsp; 4Output PowerPreamp Outputs: 1 PairPeak Power Output (Watts X Channels):&nbsp; &nbsp;&nbsp; 900 x 2Bridged Power (Watts X Channels):600 x 1Power At 2 Ohms (Watts X Channels): 300 x 2RMS Power Output (Watts X Channels): 150 x 2Minimum Impedance Bridged:4 OhmsMinimum Impedance Unbridged:2 OhmsTri-Mode Capable:Tri-Mode CapableI feel like i should be getting more bass than i have....1.&nbsp; I was talking to a car audio place and they said that when i had everything installed the guys who put it in used the wrong ohm rating for my 2 subs and that its cutting down on the power.&nbsp; He also said the amp is a little underpowered for those subs.&nbsp; Is this true?2.&nbsp; I was thinking about getting a new JL 500-1 amp to hook up now, then upgrade my subs to either a 12w6 or 10w7 in the future.My questions-1.&nbsp; If i get the JL 500-1 will i be able to run my 2 10w3s off this, then switch to either the 12w6 or 10 w7 later?2.&nbsp; Are there different versions of this amp?&nbsp; If so which one will i need?3.&nbsp; What ohm rating would i need for the 12w6?4.&nbsp; What ohm rating would i need for the 10w7?5.&nbsp; I dont know much about all this yet, anything i should know before buying all this?Thanks for the help!</blockquote>

[QUOTE="blazergt, post: 4708047, member: 595772"] I am fairley new to all this and have a few questions. First off this is whats in my car right now. Head unit - Alpine CDA-9847 Built-In Power Amplifier Yes Built-In Amplifier RMS Power 4 x 18 Watts RMS Built-In Amplifier Power 4 x 50 Watt Speakers - **Front - Alpine SPR-17C Interface Connection: Male Quick Disconnect Terminal Overall Max Frequency Response: 27 kHz Sensitivity: 87 dB Speaker Configuration: Midwoofer and Tweeter Combo Maximum Input Power Rating: 300 W/channel Overall Min Frequency Response: 67 Hz Type of Speaker: Multi-Element-- 2-Way Nominal Input Power Rating: 100 W/channel Nominal Impedance: 4 ohm(s) **Rear - Alpine sps-500 Sensitivity-87dB /W(1m) Impedence-3.6 Ohms Frequency Response-80Hz - 22kHz Power Handling Capacity (Peak)-170 Watts Power Handling Capacity (RMS)-55 Watts CEA-2031 Power Rating-55 Watts Subwoofer (2)- 2 - 10w3v2-d4 Dual Voice Coil Yes Impedance 4 ohms Peak Power Handling 600 watts approx. RMS Power Handling 300 watts * I took an ohm reading and for each sub (Wired into the box) reads about 7.2, dont know what that means lol Amp for sub- Rockford Fosgate - p6001 Amplifier Class: AB Number of Channels: 2 Min Frequency Response: 20 Hz Max Frequency Response: 20 KHz Bridgeable: Bridgeable Signal To Noise Ratio: 80 db Fuse Rating:2x40 AMPS Wire Gauge: 4 Output Power Preamp Outputs: 1 Pair Peak Power Output (Watts X Channels): 900 x 2 Bridged Power (Watts X Channels):600 x 1 Power At 2 Ohms (Watts X Channels): 300 x 2 RMS Power Output (Watts X Channels): 150 x 2 Minimum Impedance Bridged:4 Ohms Minimum Impedance Unbridged:2 Ohms Tri-Mode Capable:Tri-Mode Capable I feel like i should be getting more bass than i have.... 1. I was talking to a car audio place and they said that when i had everything installed the guys who put it in used the wrong ohm rating for my 2 subs and that its cutting down on the power. He also said the amp is a little underpowered for those subs. Is this true? 2. I was thinking about getting a new JL 500-1 amp to hook up now, then upgrade my subs to either a 12w6 or 10w7 in the future. My questions- 1. If i get the JL 500-1 will i be able to run my 2 10w3s off this, then switch to either the 12w6 or 10 w7 later? 2. Are there different versions of this amp? If so which one will i need? 3. What ohm rating would i need for the 12w6? 4. What ohm rating would i need for the 10w7? 5. I dont know much about all this yet, anything i should know before buying all this? Thanks for the help! [/QUOTE]

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