This one is for the experts. I have purchased the Rockford Fosgate 501x 2-channel amp that is 2 ohm stable. I have one DVC Kicker CompVR subwoofer (4ohm a coil i believe). It is in a 1.5 cubic foot box in the backseat of my 2 door sunbird. I assume i should bridge the amp and get all the power i can, but do i run the voice coils parallel or series. Is the sound quality the same, and/or does one allow more power.
Also, does it make a big difference if i was to make a bigger enclosed box, or is the small airspace in the Subird going to limit my bass capability. I have the JVC KD-LH3100 head unit. It ran me 349 bucks so its nice. And the amp says 1500 watt, so its got power. The sub is very nice. So how do I get MOOOREEE BBBAASSSSS.
Replies (1)
Swez on 06/30/2003 06:11:05
Not the best combination here Rob... same problem you had with that 4 channel RF amp you took back already.
The RF Punch 501 X is a 2 channel amp and is only 2 ohms stable in stereo mode. You can expect 125 watts RMS per channel at 4 ohms or 250 watts at 2 ohms. This amp when bridged, will deliver 500 watts RMS (1500 peak ...yeah right) into a 4 ohm load.
The best you can do with this sub/amp combo is to wire one voice coil to each amp channel for 250 watts RMS to the sub period !!!
As for the sub box, if you went with a vented enclosure of 3.0 cf, this would add 4-6 more dB of bass from that same Comp VR sub. Sub Zone makes a nice box and here are the specs and part number"
HV-151VR 15" Vented 3/4" MDF Box for Kicker Comp VR w/ 1.5" Baffle - 3cf
18"h x 19 1/2"d x 29"w
http://www.thezeb.com/caraudio/subzone_kicker_sub_boxes.html
FYI: Can you return the amp and get a MONO amp that can deliver a full 500 watts RMS at 2 ohm loads? If you wish to stay with RF line of amps, the RF 500 BD series will do the job!
Look here: http://www.thezeb.com/caraudio/rockfordfosgateamps.html
Great price too! $279.99 + S&H
FYI: Rob, we seem to be having a communication gap here. The last group of postings you made, we asked for some specific information on your sub ohms configuration and what would be a good amp to power that Comp VR sub. I checked back to those responses and there were no replies to the questions we asked. Is it because you are new to the game and do not understand the questions/answers we gave? If so, let us know and we can rephrase the information in a way that will give you what you need at your speed and level of understanding.
We are here to help you and all that come for advice, but if the reader does not follow that advice nor reply to our questions, we cannot effectively help them out. FROWN
Finally, it is generally best to stay in the original posted thread as all the prior information is right there and easy to review what was said and done thoughout the process. If one posts a new topic each time in a related subject, all the history data and responses are scattered and the techs have to go and find them, read them and them then come back to answer the new posts. NOT A VERY EFFICIENT USE OF TIME .... use good board etiquette please...
Swez
PS When reading specs on amps and subs, disregard the PEAK WATTS information given. The real world specs are stated in RMS watts values. (Root/Mean/Squared) That is the number to focus on.
Also, does it make a big difference if i was to make a bigger enclosed box, or is the small airspace in the Subird going to limit my bass capability. I have the JVC KD-LH3100 head unit. It ran me 349 bucks so its nice. And the amp says 1500 watt, so its got power. The sub is very nice. So how do I get MOOOREEE BBBAASSSSS.
Replies (1)
Swez on 06/30/2003 06:11:05
Not the best combination here Rob... same problem you had with that 4 channel RF amp you took back already.
The RF Punch 501 X is a 2 channel amp and is only 2 ohms stable in stereo mode. You can expect 125 watts RMS per channel at 4 ohms or 250 watts at 2 ohms. This amp when bridged, will deliver 500 watts RMS (1500 peak ...yeah right) into a 4 ohm load.
The best you can do with this sub/amp combo is to wire one voice coil to each amp channel for 250 watts RMS to the sub period !!!
As for the sub box, if you went with a vented enclosure of 3.0 cf, this would add 4-6 more dB of bass from that same Comp VR sub. Sub Zone makes a nice box and here are the specs and part number"
HV-151VR 15" Vented 3/4" MDF Box for Kicker Comp VR w/ 1.5" Baffle - 3cf
18"h x 19 1/2"d x 29"w
http://www.thezeb.com/caraudio/subzone_kicker_sub_boxes.html
FYI: Can you return the amp and get a MONO amp that can deliver a full 500 watts RMS at 2 ohm loads? If you wish to stay with RF line of amps, the RF 500 BD series will do the job!
Look here: http://www.thezeb.com/caraudio/rockfordfosgateamps.html
Great price too! $279.99 + S&H
FYI: Rob, we seem to be having a communication gap here. The last group of postings you made, we asked for some specific information on your sub ohms configuration and what would be a good amp to power that Comp VR sub. I checked back to those responses and there were no replies to the questions we asked. Is it because you are new to the game and do not understand the questions/answers we gave? If so, let us know and we can rephrase the information in a way that will give you what you need at your speed and level of understanding.
We are here to help you and all that come for advice, but if the reader does not follow that advice nor reply to our questions, we cannot effectively help them out. FROWN
Finally, it is generally best to stay in the original posted thread as all the prior information is right there and easy to review what was said and done thoughout the process. If one posts a new topic each time in a related subject, all the history data and responses are scattered and the techs have to go and find them, read them and them then come back to answer the new posts. NOT A VERY EFFICIENT USE OF TIME .... use good board etiquette please...
Swez
PS When reading specs on amps and subs, disregard the PEAK WATTS information given. The real world specs are stated in RMS watts values. (Root/Mean/Squared) That is the number to focus on.
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