http://www.clarion.com/us/e...er/XC1410/index.html

thinking about installing it with my after market unit.

http://www.crutchfield.com/...neer-MVH-X560BT.html

[This message has been edited by mmeyer86gt/gtp (edited 01-04-2016).]

I really want to try one of those out but I've been put off by bad reviews. Kenwood, Alpine, and Rockford-Fosgate all make compact Class D amps like this. In theory the problem with these amps is poor frequency response so sound reproduction is crippled. Class Ds are fine for bass, but typically not what you want for anything else... but maybe they're passable, or maybe these guys have some tricks to improve response. Not sure, but I'm a little hesitant to experiment.

Here they are:

Kenwood: http://www.crutchfield.com/...nwood-KAC-M1804.html
Rockford: http://www.crutchfield.com/...osgate-PBR300X4.html
Alpine: http://www.crutchfield.com/...445U-Power-Pack.html

I keep coming back to the Kenwood, but I'm just really hesitant.

FWIW, this technology is generally catching on - Sony now has a head unit with one of these amps built in:

http://www.crutchfield.com/...ony-MEX-XB100BT.html

This is a 40w *RMS* head unit, in theory as good as any of those amps, same tech. Most head units are 14w-20w RMS, hence the need for a small amp in the first place.

[This message has been edited by thesameguy (edited 01-04-2016).]

Oddly enough I just put this in an S10 with Infinity reference series speakers, its not super noticeable but does help. I'm not an audiophile so measuring the effect was always where I found it hard to know. It should have put the speakers much closer to their their sweet spot for RMS.
If you get it use ebay or amazon for a much better deal than Crutchfield had it.
Mine was $88 shipped.

[This message has been edited by 2.5 (edited 01-05-2016).]

D Class amps are great and are no longer "mono channel for bass" only anymore.
The tiny Xtant 1.1i mono amp I have in my Indy for the sub is an early D Class amp.
But they can create some problems with RFI because of the circuits and switching design.

I bought a beautiful Soundstream Picasso Nano PN4.320D 4-channel amplifier for my Honda Goldwing motorcycle.
4.5"x7"long x1.5"high http://soundstream.com/product/pn4-320d/



I mounted this amplifier in the fiberglass/plastic trunk which also has the mast antennas mounted to it.
Because of the near proximity between the two, the RFI produced by the amp wiped out half my FM channels.
I tried relocating grounds and installing ferrite chokes with no solution. So I had to take it out. (still have it in the box)
This would not have been a problem in a steel chassis car mounted in the trunk or under a seat away from the antenna.

I took it out and got hold of an Alpine KTP-445U (a bit less power than Nano) and about the same as the Clarion mentioned.
This is also a D class amplifier, but the design of the circuits didn't create any FM interference and works great on the motorcycle.
2.5" x7.5"long x1.5"high http://alpine-usa.com/product/view/ktp-445u


------------------
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[This message has been edited by fierosound (edited 01-05-2016).]

quote Originally posted by fierosound: D Class amps are great and are no longer "mono channel for bass" only anymore.

Not sure I'd go so far as great. Because they are switched devices and not linear gain devices they will still damage sound that a traditional A/B amp won't Maybe you can't tell but that doesn't mean others can't or that it's not happening. Some folks put amps in their cars to get away from the MOSFET amps that are in virtually every head unit on the planet - those folks would not be well-served by moving to a bigger MOSFET amp. However, if you're happy with the sound from your head unit and just want more of it, sure, a Class D amp is a great, inexpensive, compact way to go. *Personally* I can tell the difference between a quality A/B amp and a D amp - I'm just not sure of whether it bothers me or not yet... especially in an old, loud car listening to mostly MP3s anyway.

On the subject of new amp technology, I guess these new "Class T" amps are also worth a mention:

http://www.amazon.com/Lepai...keywords=class+t+amp

These are an evolution of Class D amps that *ostensibly* offer better performance. "Class T" is a trademark name ("Tripath") but other folks use similar implementations of digital amps to achieve results. Anyway, point being, if you really want to save space and money and sound quality isn't of the utmost importance, maybe give one a try.

quote Originally posted by thesameguy: Wanted to add: I posted links to Crutchfield because it was easy - I'd personally not buy this stuff from Crutchfield as their pricing is way out of whack. I typically buy from either Sonic Electronix (http://www.sonicelectronix.com/) or from Amazon, but mostly any place that *isn't* Crutchfield will have similar, lower prices.

It was Sonic Electronix ebay ad where I got mine.

quote Originally posted by thesameguy: Not sure I'd go so far as great. Because they are switched devices and not linear gain devices they will still damage sound that a traditional A/B amp won't. Maybe you can't tell but that doesn't mean others can't or that it's not happening. ... Anyway, point being, if you really want to save space and money and sound quality isn't of the utmost importance, maybe give one a try.

Agreed. The Alpine D class works perfectly fine for my motorcycle.

However, THIS is what I have in my GT and it fits fine...





More https://www.fiero.nl/forum/A...031110-1-025672.html

[This message has been edited by fierosound (edited 01-05-2016).]

Seems... adequate....

quote Originally posted by thesameguy: Seems... adequate....

Seems?

Not as commonly known and built here in the US, I'd love to get my hands on a couple of the old Audio Art amps. All the magazine comparisons I saw put them on level with the Rockfords, Orions, Linear Power, PPI and such of the era. They were made not to far from where I lived in California (made in Walnut California) and going to shows with a friend who competed I saw a few of the cars running them. I had Orion and Soundstream amps already back then so I never bought any Audio Arts. Now though? If I ever find a good deal on one I'll pick it up. Used ones still come up from time to time on eBay and such. This one which would be perfect for what I want.

http://www.ebay.com/itm/AUD...p2056016.m2516.l5255

[This message has been edited by Khw (edited 01-05-2016).]