Marine Electronics Forum - JL Audio M600/6 amp....

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View Full Version : JL Audio M600/6 amp....


ScarabChris
06-07-2011, 09:00 AM
Anyone using this amp? I just got my entire system from Jim at BOE which consists of two 10" JL woofers and two pairs of the JL M770-CCS.

I also got the Fusion IP600 and the JL M600/6 amp.

This is the same system I had in my last boat with exception of the amp. Before I had an automotive Rockford Fosgate 400/4 (400 watt) amp which was massive compared to this amp.

The system sounded fantastic.

But looking at this JL amp it is tiny in size. Anyone have any experience with this particular amp installed in a similar system? I would hate to install it and be disappointed in the output. On the box they do say "amazing power in a compact unit"

Maybe I'm just used to 600 watt amps looking like surf boards. I guess the technology has improved?


cdmckenzie
06-07-2011, 09:14 AM
Chris - I have this amp installed in my 22 center console and it sounds amazing. Here's my setup:

- 1 JL audio 600/6
- 1 10" JL subwoofer
- 2 6.5" JL coaxals
- 2 7" JL coaxals
- Currently using a Pioneer car stereo with only 1 pair of RCA outputs which i had to use Y splitters on for the coaxals

I'm very impressed with the amp but I have additional plans of using this for 3 pairs of coaxals and then aquiring another JL amp to power 2 subwoofers.

My vote is to go for it!

GatorContender
06-07-2011, 11:17 AM
Its is a banging amp...The Alpine PDX's are also very compact compared to competing amps. I just upgraded to one from my pioneer and I can fit 2 amps where 1 was before...


bradv
06-07-2011, 01:58 PM
Great amp but y didn't u go with the 700/5 left a lot of potential power on the table

ScarabChris
06-07-2011, 02:53 PM
On my last system with the same speakers and radio it really sounded great with a 400 watt amp.

I figured jumping up another 200 watts was more than enough power. Plus having 6 channels works perfect with the amount of speakers I have.

DirtBusters
06-07-2011, 03:04 PM
6 channel amp can safely run up to 12 4 ohm speakers. the JL amps are damn near bulletproof and sound great. JL speakers are awesome as well. I think the pricing is a bit high, but you really get what you're paying for...

bradv
06-07-2011, 03:57 PM
U have 4 speakers and 2 subs. The subs should be on a mono block amp or channel. If each sub is only getting 75 watts or whatever that amp is rms they will suck and be way underpowered. If anything it should be bridged on channel 5 and 6 but u can't bridge and run at 2 ohms....so get the 700/5. 4 main speaker channels and 1 mono block channel that will run at 2 ohms.

t500hps
06-07-2011, 06:06 PM
It's a class D amp and a kicker. I have a 500/1 powering a pair of 10 inch subs and it makes your eye jiggle.

You'll be pushing the same amount of power to the subs as you will be to the 7.7's. IMO they need twice as much power pushing them....but it will sound good either way.

vc
06-07-2011, 07:47 PM
Chris,
I got the same speaker set up you did from Jim/BOE but I got the 900/5 amp and it's awesome sounding. I can't comment on the amp you got since I have not run it, but I don't think I would be happy with less than I get from the JL 900/5.

ScarabChris
06-08-2011, 05:50 AM
I'll give the amp a try and see what happens. Worst case scenario is I will need to change it out.

But I can always run the left 7.7's on channel one and right 7.7's on channel two then use channel 3&4 bridged and channel 5&6 bridged for the two subs. This way the subs will get twice the power.

We will see.....

t500hps
06-08-2011, 07:53 AM
..............or,

Buy another set of 7.7's for channels 5+6. Then buy something like the 500/1 to power the 2 subs!!! :)

ScarabChris
06-08-2011, 09:36 AM
Hmmm....trying to keep the system simple with just one amp.

t500hps
06-08-2011, 09:58 AM
Hmmm....trying to keep the system simple with just one amp.

Just a thought.
A throughly pumping stereo helps the girls forget anyone else is around watching what they are doing. Mix that with a couple drinks and well....you know!!!! :o

bradv
06-08-2011, 10:01 AM
Then go 700/5 or 900/5

Glen E
06-08-2011, 10:31 AM
Chris - I have watched you for years get stuff that does not work out because you wanted to make a decision on your own.Remember the jensen? :grin::grin::grin::grin:

Just get the 900/5 and be done with it. Based on the way you boat, it is the clear choice that is correct here...

ScarabChris
06-08-2011, 03:00 PM
The 900/5 is also a class D amp. Can someone tell me what this means?

t500hps
06-08-2011, 03:28 PM
class D amps run cooler and produce more power than their A/B counter parts, basically they are more efficient. While they loose little to no power when the voltage drops, class A/B amps loose alot of their power as voltage drops (EX: from 14.4v running to 12.5v sitting to 11.0v after sitting awhile)

t500hps
06-08-2011, 03:32 PM
Note the specs from the 2 amps......the 600/6 lists power ratings at 14.4 vs 12.5 volts with a 15 watt drop whereas the 900/5 has one power rating regardless of voltage (showing the same power at 11v-14.4v)


M600/6 600W 3/4/5/6 Channel Amplifier Specifications:
M600/6
Rated Power 14.4 V Stereo: 75W RMS x 6 @ 4 ohms
100W RMS x 6 @ 2 ohms
Rated Power 14.4 V Bridged : 150W RMS x 3 @ 8 ohms
200W RMS x 3 @ 4 ohms
Rated Power 12.5 V Stereo: 60W RMS x 6 @ 4 ohms
90W RMS x 6 @ 2 ohms
Rated Power 12.5 V Bridged: 120W RMS x 3 @ 8 ohms
180W RMS x 3 @ 4 ohms
THD at Rated Power: <1% THD, 20 Hz - 20 kHz




HD900/5 Five-Channel Class D Marine System Amplifier Specifications:
MHD900/5
Rated Power: 750 W RMS @ 1.5 ohm - 4 ohm (11V-14.5V)
Rated Power Front Channels: 100W RMS x 2 @ 4Ω (11V - 14.5V)
75W RMS x 2 @ 1.5-3Ω (11V - 14.5V)
Rated Power Rear Channels: 100W RMS x 2 @ 4Ω (11V - 14.5V)
75W RMS x 2 @ 1.5-3Ω (11V - 14.5V)
Rated Power Subwoofer Channel: 500W RMS x 1 @ 1.5-4Ω (11V - 14.5V)

t500hps
06-08-2011, 03:37 PM
BTW: My 500/1 is a class D amp and although that suggests its a 1 channel amp it does provide outputs for 2 subs...putting a true 250w to each sub. I suspect the sub channel of the 900/5 works the same way.

ScarabChris
06-08-2011, 03:47 PM
Well you guys convinced me. Jim from BOE is going to exchange the 600 for the 900 for me.

GatorContender
06-08-2011, 03:55 PM
Great choice!

ScarabChris
06-08-2011, 04:11 PM
So now should I run both 10" subs in parallel to that 5th channel? This will drop the ohms down to 2. Will the amp take it?

Or should the 2 subs be wired in series to the 5th channel?

t500hps
06-08-2011, 04:31 PM
So now should I run both 10" subs in parallel to that 5th channel? This will drop the ohms down to 2. Will the amp take it?

Or should the 2 subs be wired in series to the 5th channel?

I'm not sure how it works on your amp cause my 500/1 had outputs for 2 subs. (see image) I will only advise what I've experience or know and have no problem saying so when I'm not sure of the answer......my belief is that you can run them off this amp like that but get expert advice.

http://mobile.jlaudio.com/images/13358.jpg

There is also a bass adjust knob that can be mounted near anywhere that plugs into the amp like a phone jack. It lets you adjust the bass from one song to another....it's not a must have but it sure was nice if your using songs DL off the internet (that the bass level changes from song to song). I simply can't find a link to the thing!!!!!
here it is on ebay, verify it works with whichever amp your buying.
http://cgi.ebay.com/JL-AUDIO-RBC1-REMOTE-BASS-KNOB-CONTROL-1000-1v2-500-1v2-/290574705824?pt=LH_DefaultDomain_0&hash=item43a79a24a0#ht_1478wt_1141

edit:
found more info.
http://marine.jlaudio.com/products_amps_pages.php?page_id=96

bradv
06-08-2011, 04:41 PM
Run both subs off channel 5. Its 500 watts no matter what and is good down to 1.5 ohms. Which with 2 will only be 2 ohms. Get the cd and adjust the gain correctly it will fry ur subs voice coils....twice if ur not careful

yachtjim
06-09-2011, 07:08 AM
Here is the base knob - http://www.boemarine.com/products/RBC-1/jl-audio-rbc-1-bass-knob

We used to use them on every install but got away from it and I honestly can't put my finger on exactly why. Perhaps because the stereos we use now have such easy bass control.

Glen E
06-09-2011, 07:16 AM
Here is the base knob - http://www.boemarine.com/products/RBC-1/jl-audio-rbc-1-bass-knob

We used to use them on every install but got away from it and I honestly can't put my finger on exactly why. Perhaps because the stereos we use now have such easy bass control.

if you listen to your music sand bar loud or when cruising, get the knob. No natter how you set music, when you using this much wattage, there will be a song come along that will blow you out of the boat. The knob is the quickest way to moderate that. Also, when at cruise - you can quickly turn down the bass which is not needed anyway. My fader and bass knob:
http://i67.photobucket.com/albums/h307/gersly123/audio/rlc.jpg

ScarabChris
06-09-2011, 02:58 PM
Agreed! I hate that when you're listening to the tunes and one song comes on with way too much bass.

Hey Jim, can you charge my card for the knob and send it to me?

DirtBusters
06-09-2011, 03:40 PM
If you were to take your 500/1 apart, both positive outputs and both negative outputs would be summed, therefor making it a ONE channel amp. Companies add a "dual" output to make connecting multiple speakers easy.


ScarabChris, you should parallel both subs, effecting a 2 ohm load which will obtain maximum output from the amp. wiring the subs in series would allow the amplifer to see an 8 ohm load...and get very little power...
edit:
found more info.
http://marine.jlaudio.com/products_amps_pages.php?page_id=96[/QUOTE]

t500hps
06-09-2011, 03:43 PM
If you were to take your 500/1 apart, both positive outputs and both negative outputs would be summed, therefor making it a ONE channel amp. Companies add a "dual" output to make connecting multiple speakers easy.


ScarabChris, you should parallel both subs, effecting a 2 ohm load which will obtain maximum output from the amp. wiring the subs in series would allow the amplifer to see an 8 ohm load...and get very little power...
edit:
found more info.
http://marine.jlaudio.com/products_amps_pages.php?page_id=96[/QUOTE]

That's what I assumed about my 500/1 but didn't want to offer it as gospel unless I was positive.



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