S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

2011 mercedes s550 4matic 722.9 amplifier

Old Nov 25, 2021 | 01:22 PM
  #1  
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W221 S class 550
2011 mercedes s550 4matic 722.9 amplifier

How many amplifiers supposed to be in this vehicle..? Does this amp originally come

This is installed in my vehicle. wanting to know does this come with the vehicle
in this vehicle?
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Old Nov 25, 2021 | 01:32 PM
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S500
that's a proper amp - after-market - these are by grown ups and it puts out real quality power, not random rot

intrigued how he wired it up.... is it JUST powering a sub

Had one in my BM but for these you can get plug and play looms

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Old Nov 25, 2021 | 01:37 PM
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W221 S class 550
Ok..just got my amp out the shop and it works good..but noticed my sub in the back isn't loud that's powered by this amp...I checked the wiring and the previous owner cut the wires from the original amp and ran it to this amp..gonna put the wires back as original to see if my sub bumps like the front does...even when I put the fader to the rear u barely hear the sub...I'm thinking maybe the rca Jack's on this amp has gone bad..but wondering if the Harmon amp would bump harder..
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Old Nov 25, 2021 | 01:42 PM
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under the aluminium cover is all manner of tuning and vol adjutsments

this amp is 1000% better than the one merc used - more power - better sound as it can drive the unit not just waft in the breeze pretending to help the way Merc does it
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Old Nov 25, 2021 | 01:44 PM
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S500
ripping out any of the three BMW amps (including the HK one - which is the higher cost but worst amp you can have in a BMW) for one of these it the first improvement step most BMW owners install
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Old Nov 25, 2021 | 01:45 PM
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W221 S class 550
Wonder could I turn the amplifier up..don't see any knobs at all...
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Old Nov 25, 2021 | 01:48 PM
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S500
Originally Posted by Cuzzo
Wonder could I turn the amplifier up..don't see any knobs at all...
check the bold bit of post above

under the aluminium cover is all manner of tuning and vol adjustments
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Old Nov 25, 2021 | 01:50 PM
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W221 S class 550
So I should be able to purchase another amp in place of this job audio..a better amp..?
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Old Nov 25, 2021 | 01:55 PM
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S500
I think u just have a 2 channel one - is likely wiring and set up - check the model and how to set it up

https://www.jlaudio.com/collections/...mplifiers-xdv2

manual https://embed.widencdn.net/pdf/plus/...N.pdf?u=ndijqi



.

Last edited by BOTUS; Nov 25, 2021 at 04:43 PM.
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Old Nov 25, 2021 | 01:58 PM
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W221 S class 550
Omg..my woofer sounds 1000% better the original way....so the other amp has something wrong I believe it may be the Male to female plug..gonna order another plug and see how it does..if it does work..I'll just find another quality amplifier with gain control at least...
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Old Nov 25, 2021 | 02:06 PM
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W221 S class 550
You're quick..I was trying to find that...thanks alot... here's what I have..

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Old Nov 25, 2021 | 04:40 PM
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S500
well just imagine when u get it running on an amp worth switching on then....

Monoblock Class D Subwoofer Amplifier, 300 W x 1 @ 2 Ω / 200 W x 1 @ 4 Ω - 14.4VThis ultra-compact monoblock amplifier employs our high-speed NexD™ switching design to achieve unprecedented efficiency and amazing power output for its size.

Targeted specifically for subwoofer applications, the XD300/1v2 includes a variable slope low-pass filter with continuously variable cutoff frequency selection from 50-500 Hz.

The XD300/1v2 also features the v2 Spec feature set, which consists of automatic turn-on capability (via signal sensing or DC-offset sensing), and a dual-range differential-balanced input section able to handle a wide range of input voltage levels. With the addition of an HD-RLC remote level control (sold separately), the amplifier's level can be directly controlled from the driver's seat.

This amplifier features a black powder-coat finish and a gasketed, brushed aluminium cover for the controls.
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Old Nov 26, 2021 | 11:05 AM
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W221 S class 550
Great amp I see

I'm hoping it's just a wiring issue with the JL audio amp...rca Jack's will be here Saturday...want to get 2 12's in a small box for this amp...there's something else added back there too.. not sure if it's stock or not..seems it's how the previous owner had it all wired up..will post it soon, they have a bracket holding it in place sideways and hard to get a good pic of the front..
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Old Nov 26, 2021 | 11:21 AM
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S500
I'd put a link to the user manual in the link above...


manual https://embed.widencdn.net/pdf/plus/...N.pdf?u=ndijqi

with a real amp driving the stock sub u will be shocked at the positive change - lets hope its working correctly - they are good quality amps used by lots - yes there are bigger better ones - but bang for your buck, we are talking good higher end hifi, not budget rot

middle of the amp, between the aluminium and the black face a small LED
2) Constant Green: The amplifier is on and functioning normally, audio output is active.



.

Last edited by BOTUS; Nov 26, 2021 at 11:30 AM.
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Old Nov 26, 2021 | 05:28 PM
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W221 S class 550
Amp

Going to see if I can add or replace the current JL audio...just got this amp for two

12's
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