After some extreme research....and weeding through each companies pdf files that I found on the net....this is what I found for my 2011 RGU CVO with stock HK Head Unit and stock amp(under TP).
J & M Rokker 500w(4chan) amp
# JAMP-500HR11-UL...................... $769
Stereo @ 4ohms 4 x 75 watts ----Efficiency 71%
Stereo @ 2ohms 4 x 125 watts---- Efficiency 66%
Signal to noise ratio---------- >90dB
Frequency Response -3dB---- 1Hz - 69kHz
Total Harmonic distortion----- <1%
Dimensions---10 5/8” L X 5” W X 1 5/8” H.
J & M Rokker 7.25" speakers
# HRRK-7252GTM-T ..................$349pr
Impedance 2ohm 170watt max power
J & M Rokker 5.25" speakers
# HURK-5252GTM-T ................$199pr
Impedance 2ohm 140watt max power
J & M Rokker Isolated RCA Input Amp Harness for REAR-OUTPUT Harley HK Radio
# JAMP-RCA-ADHK...............$119
So for around $1,500, you will have a very good sounding, "plug and play" stereo.
But....now lets compare to Polk Audio
Polk 800w(4 chan) amp
PA D4000.4......................$260 online
Stereo @ 4 ohms 4 x 125 watts----Efficiency 77.8%
Stereo @ 2 ohms 4 x 200 watts----Efficiency 71.3%
Bridged @ 4 ohms 2 x 400 watts
Signal to Noise Ratio-----105dB
Frequency Response -3dB----<10Hz – 35.1kHz
Total Harmonic distortion ----0.74%
Dimensions: 10-13/16" L X 6-3/4" W X 1-13/16" H
Polk 6.5" speakers
# MM6501UM............$165pr online
Impedance 4 ohms (continuous) 125watt, Max(peak) 250watt
Polk 5.25" speakers
#MM521.............$125 online
Impedance 2.7 ohms (continuous) 90watt, Max(peak) 200 watt
OK...wait....did I just do 6 hours of research, only to find that Polk is more efficient,
has less distortion, has more power handling capabilities, ...at 1/3 the price?
I understand J & M is plug and play......and I understand that J & M Rokker speakers are a little larger(though the mount you have to use funnels the sound back down to a 6.5")...I understand all that.....
...but I'll take my $1,000 that I saved ....and figure out the wiring and mounting myself...or have TIF2 help me....LOL
If I'm wrong...someone please correct me.
.