x911gt2

Anyone heard anything about the new Infinity Reference 5760a 6-channel amp? It retails for about 400 bills...but i found it at wholesale for ~$270 shipped. I was thinking it would be a good amp to give everything a little extra juice...with new speakers of course

ortiz

Haven't heard of it but I will check it out right now and get back to you.

ortiz

It looks like a good amp. $474.95 is what it says is retail. If you can get a never used one for $270 I think that is a good buy.

ortiz

That would be perfect in my car. I would use the first two channels for my infinity components. The second two channels for my alpine 6 1/2s. Then the Last two channels with more power would be hooked up to my Alpine type-R 6x9s.


Where did you say you could get it for $270 shipped?

x911gt2

Yeah, I thought it looked like a great amp. Anyways, the lowest price I had found it for was $339 from cardomain.com. Then I did some looking and happened to stumble upon this...

http://www.smilephotovideo.com/detai...itemno=IN5760A

I looked up the company name and it seems legit. I even called the place to make sure the price was correct. I ordered mine yesterday on my credit card, so if it happened to turn out to be a scam...atleast I can dispute it.

I just got kappa perfects all around so I'm hoping the deal comes through. GOod luck.

ortiz

When you get it let me know. I might go through the same dealer.

x911gt2

I forgot to tell you that I did get the amp. Everything is legit

miner

Installed yet - let us know the outcome & how you like it.

jiggaman

man that place has some good prices huh?

ortiz

I ended up buying an Alpine MRV-F540. It sounds great and matches the MRD-M500 I already have. Talk about hearing me from a mile away.

elduderino

Does the F540 have a variable hi-pass subsonic like the brochure says?

And how long is that thing, anyway? Looking to buy one soon...

ortiz

It is the same size as teh M500 mono but I haven't measured it. If you do do the amp change over the stock speakers will sound like crap and will need to be replaced.

elduderino

Understood. Going to MB Quart 6 x 9 reference woofers and Alpine X-type 5.25 components.

x911gt2

Yeah, I actually decided to go with the same model. I was thinking of getting another one and bridging it to 3 channels. Do you know what the power output is in 3 ch mode?

elduderino

I didn't but Google did:

80 watts RMS x 4 at 4 ohms
100 watts RMS x 4 at 2 ohms
200 watts RMS x 2 in bridged mode
2-, 3-, or 4-channel output

vitocorleone

Greetings. The TSX will be our only car (will be getting an '05), and we need the trunk space - so no sub. I know the stock factory amp is in/near the center console and, while replacing every speaker will improve the sound significantly, is underpowered and not of high quality.

What other amp mounting options are there? Most aftermarket amps are much larger, unless we're talking about a 2ch amp just for the front components. What other amp mounting options are there, that allow the trunk to be used and the rear seats to be folded? I'd happily get the Infiniti 6ch amp as a replacement, but where does such a beast go mounted? Thanks!

vitocorleone

Greetings. The TSX will be our only car (will be getting an '05), and we need the trunk space - so no sub. I know the stock factory amp is in/near the center console and, while replacing every speaker will improve the sound significantly, is underpowered and not of high quality.

What other amp mounting options are there? Most aftermarket amps are much larger, unless we're talking about a 2ch amp just for the front components. What other amp mounting options are there, that allow the trunk to be used and the rear seats to be folded? I'd happily get the Infiniti 6ch amp as a replacement, but where does such a beast go mounted? Thanks!

elduderino

First, decide what speaker system you'd LIKE to have.

I am going with a set of 5-1/4" components up front and a pair of 6x9 woofers in the back.

Mostly this was driven by the screamin' deal I got on the Alpine 5-1/4" X types that I got.

Another approach, possibly more valid than mine, is to go with 6.5" seperates or coaxial/seperates in the front doors, and another set of 6.5" in the rear doors (I would use mid-bass drivers and run them such, probably cutting them off at the top end around 300 Hz or so).

This would sound more accurate than my system - the 6.5's play better-sounding bass than the 6x9's will. The 6X9's will be louder... not a priority for me, though.

I guess my point is that these are both 4-channel systems... not 6-channel systems. As far as fidelity goes, you don't need six channels for F/R/Sub. Maybe for volume, maybe for playing music for rear-seat passengers, but not for fidelity. (Six channels for Hi/mid/Lo is another story.)

And four-channel amps come in more sizes and shapes. You could get a good 4-channel amp that could fit under the aft half of the passenger seat, methinks.

How about a set of MB Quart Reference 6.5" and 3/4" tweeters with MusiCOMP xovers, a set of the same 6.5" mid-basses in the rear doors, and a JL Audio 300/4 shoved under the aft half of the rear seat? The adjustments would have to face forwards (making it hard to tune) but I think it would fit.

vitocorleone

"How about a set of MB Quart Reference 6.5" and 3/4" tweeters with MusiCOMP xovers, a set of the same 6.5" mid-basses in the rear doors, and a JL Audio 300/4 shoved under the aft half of the rear seat? The adjustments would have to face forwards (making it hard to tune) but I think it would fit."

Excellent - thanks for the recommendations. In your recommendation, were you unhooking the 6x9's competely or just leaving them running on factory amp power?

Fidelity at a "reasonable" cost is priority #1 (and the less mods/cutting the installers have to do the better - would love to use factory grills, too, if possible). Might need to be able to hear some highs in the back (thinking ahead to having to ride in back with a little one sometime in the future). Probably have to start with new speakers and add an amp later - and the amp chosen will have to depend on space available, of course.

I was thinking of MB's (looks like spacers are needed in front) or Polk's for the TSX. My Integra has Boston Pro components in front and Kenwoods in back for fill with a 50x4ch Eclipse amp, sounds good, but want to go a little nicer in the new car.

elduderino

Everything would use factory grilles if you use the MB Q with the tweets in the coaxial position.

I would disconnect the 6x9's myself. Since the speakers have spacers embedded in the frame any door speaker requires a spacer of some sort. I am making some this weekend and will document with photos...

I just picked up a used JL 300/4 for a good deal and I will find out in the next couple of days what it takes to get it to go under the passenger-seat crossbar. It fits between the seat brackets, but the crossbar hits it. I intend to pull the seat, pull the carpet, remove all matting below the carpet, and re-test - it's pretty close.

vitocorleone

Cool - I'll keep checking back. Would an xtant4.4 fit lengthwise under the seat? It's long and relatively thin.... 15 9/16" L x 9 1/16" W x 2" H. I suspect it would protrude from underneath the seat such that a rear passenger could kick it accidentally. Always loved the sound of it.

elduderino

JL 300/4:

Dimensions:
13.4"L x 9.25"W x 2.36"H

Nothing any longer than that will go between the seat brackets, and I recall that the 4.4 is longer than that.

Back in the day I would have used a small Alpine 4-channel - but they went past 2" tall a few years ago The Eclipse 4-channels would fit - they are only 2.05" tall - they have a premium line and an integrated line. The Premium probably doesn't suck, but is 13.3" by 11.8"...would stick out aft a bit. The Integrated is 10.85" square, I think, but is not as good as the Premuim, but certainly better than stock.

What we did in another TSX was built a panel taht sat on top of the gas tank area ahead of the spare well, and mounted the amp to that in the trunk. It's visible, but not really in the way...

vitocorleone

Would it be possible to install just a 2ch amp under the front seat to drive front components and continue using the factory amp for the rear speakers? Would it be possible to get a decent soundstage/fidelity (with new speakers in the rear, too, of course)or would it just be louder in the front. Would prob have to leave 6x9's hooked in to ensure there was enough "fill" in back to make up for the difference. Trouble is, the 2ch amps are no thinner than they're bigger brothers, though they typically lose an inch or two in length (e.g., Eclipse PA4212 2ch is 11.32x11.85x2.05 vs 4ch 13.32x11.85x2.05). My current Eclipse amp is the EA36401 and it sounds "sweet" enough to me - maybe I'll check into getting it professionally uninstalled at the place the installed it if it doesn't cost too much and take it with me... if it'll fit under the seat. It measures 10.82x10.82x1.97.

Other "thinner" quality 2ch amps/sizes (LxWxH)
* xtant2.2 11 11/16" x 9 1/16" x 2"
* Eclipse PA4212 11.32" x 11.85" x 2.05"
* Eclipse EA2212 8.85" x 10.82" x 1.97"
* JL Audio 300/2 13.4" x 9.25" x 2.36"
* JL Audio e2150 9.25" x 9.8" x 2.36"
* Rockford Fosgate Punch P2002 and P3002 11" x 11.7" x 2.4"
* Nakamichi (how good are their car amps?) PA-1002 11 1/2" x 2 1/8" x 14 7/8"
* Phoenix Gold Tantrum 300.2 8.4" x 10" x 2.35"

The 4 channel siblings of these models are all the same thickness, just larger.

Also, are the crossbars (not sure what they're actually called) for the trunk in the way of installing a small amp between the 6x9's under the rear deck?

elduderino

Some have "hung" an amp where the navi goes on non-navi cars... and if you're good with metalwork you could suspend an amp from there, navi or no. I don't have access to that kind of equipment any longer, so I gave up on the idea. Oh, and technically they're "torsion" bars (like the rear suspension on an old 911: )

Yeah, I hadn't realized how much the "high"-power "45W" decks had killed the small 20W x 4 amp category - EVERYTHING has to be huge now!

The JL 'e' series has the cables coming out one end, so I'm not sure it would fit either (considered it). THe 300/4 has the cables on one long side.


I would stay away from Nak car amps... company's too much on the bubble.

Anyone have any experience with the MBQ amps? Are they just Rockfords?

vitocorleone

Realized that I haven't been on topic too much in my posts. To make up for it:

JL Audio also has a 6 channel amp (e6450). Not sure how it compares to the Infinity, except that it's 45w x 6 @ 4 ohms and a beefy 17.7" x 9.25" x 2.36" (the Infinity is 56w x 4 and 107w x 2 and 18.5" x 12" x 2.69"). I'd wager that, despite pushing less rated power, the difference is not so huge and the sound quality is at least equal - if not better. Audiobahn also has a 6ch amp, the A5100T. It pushes 125w x 2 and 75w x 1 and 75w x 2 and 300w x 1 @ 4ohms. Spendy piece as well, at ~$1,200. There's also some amp made by Phase Linear called PBSix that's 65w x 6....

Never heard of Audiobahn but they make a 5000w rackmount amp, so they must have SOME knowledge, eh? Seems their A1004DP is a 100w x 4ch, measures only 8.5" x 9.5" x 2", making it the smallest 4ch amp I've seen. Anyone ever heard one of these amps??

elduderino

Audiobahn is trying to be taken seriously but I still think of them as second-tier. I don't think they MAKE anything... I think they have a PO book and a fax machine...

Keep in mind that the JL "E" series is not the same design at all as the "slash" series. Not fully regulated for one.

Phase Linear makes car audio again? I thought Jensen killed that brand in 1989...

You could find some used a/d/s/ amps on ebay... and Directed is blowing out the Viper Audio line, here's a 6-channel on eBay:
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5712003735