Do you require class D? Stereo Integrity SIQ 125.4 meets your parameters and the 200.4 is only $40 above your listed price range. Class A/B, clean signal path and gorgeous...

 

Good question, no, I don't require class D. But I am looking for something compact (which I loosely defined as less than 12" in either direction). I think that pretty much rules out A/B, including the SI you suggested (which is 16.5" long). Thanks for the suggestion though!! Those are nice looking amps.

 

Isn't that Hertz just a nvx jad800.4?

 

Not sure but I was just reading a thread where someone was saying that an NVX and a Hertz model were very similar. I think it was in reference to the Hertz HCP4DK though, not the Mille ML Power 4. Can't find the thread now...

 

Not on your list, but I would suggest the JL HD 600/4. I've tried a lot of amps but these keep going back in. GB60/15 combo. 750/1 for sub duty.

Plenty of power if you like it loud. I also like that it's "their" design, not just another rebadged amp.

They also hold their value and sell quick if you ever want to change.

 

Thanks for the suggestion. I definitely looked at JL but they seem to get pretty mixed reviews so it didn't make the final list. Glad you like it though!!

 

 

Biketronics Titan BT-4180?

BT4180 - 180 Watts RMS X 4

Replacement audio and lighting equipment for Harley Davidson Motorcycles

www.biketronics.com

 

Thanks for the feedback and ideas everyone! Kind of interesting that more people are suggesting amps that are not on the list, than those that are.



Thanks yea I looked at that but I don't like that it doesn't have a gain setting. It seems to be specific to the line voltage for Harleys.

The arc audio x2 600.4 ticks all the boxes as well. Controls on the top and speaker plugs. I’ve had two focal 900.6/6.900s (bigger brother) and it takes a lot of line input voltage to get the output (Or high gains, but it gets noisy above like 1/4 gain). Nice looking amp though, I like the angled terminals and the two mounting options.

I had the X2 600.4 on the list but took it off because it only does 150W@2ohm.

There's a reason why the MMATS amp is more expensive than all others...
If you must have a Class D, and you are set on that list of options; then it would be the 'go to'.

I currently have a handful of Audison Class D amps (which I'm likely going to sell soon), that you may also want to consider:

Audison - Car Audio Amplifiers, Speakers, Processors

Car audio DSP amplifiers, speakers, and subwoofers. Go beyond the ordinary solutions that are where our instinct comes in.

www.audison.eu

I've owned the MMATS amps, and they are monsters. 100% recommend them.
I've also owned the Focal FPD amps. They sound great, until you really crank them... then they crap the bed.

The Audison's that I currently have, are very nice. No complaints. I'm ditching them, because I just got a pair of Brax amps.

Great Deals

Have you found a Great Deal? This forum is created to share and find discounts, sales, and other deals found online. (No Commercial, Vendor, or Private Party posting.)

www.diymobileaudio.com

I've been back on forth on the MMATS. There are lots of ppl who love it. Some things that are holding me back are the fan and the cheap RCA connections. Also there is something about their online presence that bothers me. The website is terrible, and there are inconsistencies in the info online and in manuals. That type of stuff induces skepticism.

Thanks for the SR 4.500 suggestion. That one came to attention after starting this thread. Definitely fits the bill.

Great feedback on the Focal, thank you!!

Is the Alpine X-A70F in the mix at $799 msrp? No experience with the newer X series, but I loved my PDX V9.
Small footprint, plenty of power 120 x 4 @4 or 175 x 4 @2 (thou the PDX birth sheets usually showed a higher actual test output)
Solid rep for being built well and longevity.

I hadn't considered that one...

Agree that the XM-GS4 are really great amps regardless of the lowish cost. But the OP asked for amp suggestions with 125+ watts x 4 @ 4-ohms. And I'm fairly certain that it's a Class A/B topology as well.

Class D isn't a necessity, I just thought it was inevitable given most A/B have a larger footprint at this power level. But yea that's less power.

 

The arc audio x2 600.4 ticks all the boxes as well. Controls on the top and speaker plugs. I’ve had two focal 900.6/6.900s (bigger brother) and it takes a lot of line input voltage to get the output (Or high gains, but it gets noisy above like 1/4 gain). Nice looking amp though, I like the angled terminals and the two mounting options.

 

So by "amp shpwdown". do you mean you are going to buy all these amps and test them out and let us know what they are all about? Or are you just looking to buy an amp for your system? In which case isn't this just another what amp should i buy thread?

 

Whatever happened to the people that claim all amps sound the same?
Check out the Somy xm-gs4 if you can squeeze in a couple and Sonic does the open box deal…

 

Agree that the XM-GS4 are really great amps regardless of the lowish cost. But the OP asked for amp suggestions with 125+ watts x 4 @ 4-ohms. And I'm fairly certain that it's a Class A/B topology as well.

 

There's a reason why the MMATS amp is more expensive than all others...
If you must have a Class D, and you are set on that list of options; then it would be the 'go to'.

I currently have a handful of Audison Class D amps (which I'm likely going to sell soon), that you may also want to consider:

Audison - Car Audio Amplifiers, Speakers, Processors

Car audio DSP amplifiers, speakers, and subwoofers. Go beyond the ordinary solutions that are where our instinct comes in.

www.audison.eu

I've owned the MMATS amps, and they are monsters. 100% recommend them.
I've also owned the Focal FPD amps. They sound great, until you really crank them... then they crap the bed.

The Audison's that I currently have, are very nice. No complaints. I'm ditching them, because I just got a pair of Brax amps.

Great Deals

Have you found a Great Deal? This forum is created to share and find discounts, sales, and other deals found online. (No Commercial, Vendor, or Private Party posting.)

www.diymobileaudio.com

 

Is the Alpine X-A70F in the mix at $799 msrp? No experience with the newer X series, but I loved my PDX V9.
Small footprint, plenty of power 120 x 4 @4 or 175 x 4 @2 (thou the PDX birth sheets usually showed a higher actual test output)
Solid rep for being built well and longevity.

 

I don't think you could go wrong with the MMATS.
Have you looked at Biketronics? I think they can make those with gain controls, you'd have to call to find out.

 

I don't think you could go wrong with the MMATS.
Have you looked at Biketronics?

Yea someone recommended them earlier in the thread. The only model with gain control is $1000, and at that point I'd just go with the MMATS.

Do you have experience with Biketronics? How does that work without gain control? What are your thoughts on the gain rollback feature (when not used with a Harley)?

 

Really appreciate that feedback @JimmyDee !! It's valuable coming from someone who has used more than one model on the list. Have you used anything else on the list besides the MMATS 6150 and Audison SR 4.500?

Maybe I'll reach out to David to see if there are dealers in my area. That portion of their site will not load for me.

 

Really appreciate that feedback @JimmyDee !! It's valuable coming from someone who has used more than one model on the list. Have you used anything else on the list besides the MMATS 6150 and Audison SR 4.500?

Ya... like I mentioned in my previous post:
I've also owned the Focal FPD amps. They sound great, until you really crank them... then they crap the bed.

 

Wow awesome post @bbfoto thank you for taking the time!

I have to admit I'm in the camp you are describing. I doubt a bike amp would sound great, the shoddy website is not confidence-inspiring, etc. But posts like your do help me get over those hesitations. That said I don't really care what the amp looks like.

Option to add gain control is cool. And even cooler that he will mod it for new scenarios.

 

I've reached out to biketronics 3 times since November for basic info and still haven't received it. Good luck. Gave up, going with Mmats 6150s.

 

DOWN4SOUND JP234 - BLACK | 2000W RMS 4CH AMPLIFIER

Buy Car Audio Online the real #1 Source, Fast Free Shipping, EZ Financing, Price Match Guarantee, freebies in every order, Shop Now!

www.down4soundshop.com

This one had great results on the dyno with Big D Wiz. I have yet to install it so I can’t say how well the sound quality is. But the footprint is within what you are looking for, about 12” by 8” and the price is reasonable.

 

That is a LOT of power!!

 

SounDigital 1200.4 EVOX 4OHMS at Onlinecarstereo.com

Shop Lowest Price on: SounDigital 1200.4 EVOX 4OHMS 4 Channel Amplifiers. EVOX 1200 Series 4 Channel 4-ohm Amplifier

www.onlinecarstereo.com

These are even smaller, 7” by 5.5” and put out plenty of power as well. They’re just more expensive.

 

I've been using an Alpine PDX-F6 and have been pleasantly surprised by it. Unfortunately they were discontinued a couple years ago. It's rated 150/4 @ 2 or 4 Ohms, 12 or 14V. Regulated power supply.
The verification paper says mines at 168wpc.

 

If you're looking for a competitor to the mmats, maybe check out the arc series 1000.6 (can be had with or without built in dsp)

ARC SERIES AMPLIFIERS | ARC AUDIO

The ARC Series amplifiers are the most technically advanced amplifiers we have produced to date. They produce roughly 1000 watts of power and offer an optional built-in DSP making them one of the most versatile amplifiers on the market.

www.arcaudio.com

 

Thanks yea I looked at Arc but that's 15.5". I'd have to get creative to make that fit, if it would.

Voting based off the list, I would be for the ESX or the Mmats, both are going to be the best quality. You cannot go wrong with either, well built, great sound quality for class D, good thermal handling, and always underrated.

I do like the ESX but saw that it's only 50-70% efficient, which is pretty poor for class D

ESX QE 900.4 - AMP Performance

provided by IchAS from the Hififorum Rated power measured according to DIN 45500 up to 1% distortion factor in 13,5V ESX ...

amp-performance.de

I did hit up David at MMATS and he confirmed that the fans have been swapped out for quieter models but there isn't a dealer in my area.

In other news, we started demo in our bathroom for a DIY remodel over the weekend and found black mold. So that's been fun to deal with. Also I parked my car on the street last night (garage space occupied with new vanity and tub on pallets for the bathroom project). Someone hit my car overnight and didn't leave a note.

 

Voting based off the list, I would be for the ESX or the Mmats, both are going to be the best quality. You cannot go wrong with either, well built, great sound quality for class D, good thermal handling, and always underrated.

 

ESX - Quantum QE900.4 Amplifier

www.esxaudio.de

84% efficient

 

Oh snap! Yes I saw the manufacturer's spec for 84% but tend to believe independent reviews. Thanks for pointing out that info is old. Ok, ESX back in the game.

 

I have a Mmats 6150 that David did what he calls a 2k upgrade last March, including the new 9 blade fan. I upgraded the set screws to allen head type. I ended up with 3 and only used 2. I would sell it for $850 shipped.

 

I have a Mmats 6150 that David did what he calls a 2k upgrade last March, including the new 9 blade fan.

Can you elaborate on that? Just curious.

 

@SNCTMPL Thanks for putting that out there. I looked at several 6150 sales in the classifieds here and over the last 5 years it looks like it's not uncommon for them to go for $750 BNIB. Shoot me a PM if you'd like. Like ckiroc said, I'd be interested to know what that upgrade entailed.

 

Keep in mind they recently increased prices to, if you can find bnib at $750 jump on it and SNCTMPL is an excellent seller and all around great guy. I vote work out a deal with him and end the search and get ready to smile every time you start your vehicle.

 

$850 is a VERY reasonable price for that MMATS 6150, provided it's not all banged up.