You can still power 8 speakers from that amp, I think, if you connect them serially (if that's even the term applied to amplifiers).
I'm not very knowledgeable with amps, but I zoomed in on the DTA45 and it's a tripath 2020 chip, same chip that 41hz uses in 2 channel amps (amp6 i think). But a good chip cannot save an otherwise bad design, so I can't say anything about dta45's sound quality. I'm looking forward to Sonic's review.
My 2001 Mitsubishi Eclipse GT:
"The Project That Never Ends"
more projects then time!
Led Skyline Tail Lights--100%
High Power Led Reverse Lights--100%
Led third brake light--100%
Led front turn signals--0%
Got the device today and theyre calling for a warm(ish) weekend. Should be a quick turnaround for this review!
A review would be highly appreciated. But don't keep high expectations. It is based on the ubiquitous Tripath TA2020 chip or derivatives which is very common in OEM Car stereos.
The power figures as per datasheet
25W @ 4Ω, 10% THD+N, VDD=14.6V
22W @ 4Ω, 10% THD+N, VDD=13.5V
13W @ 8Ω, 10% THD+N, VDD=13.5V
Have a good look at the THD figures above and decide yourself whether these deserves the audiophile tag. Also you can buy these on eBay for almost half the price that ByByte charges.
Again, I must restate, all amps are subject to rising THD as power increases. Lower the power and your THD can easily fall into whatever is considered "audiophile" category.
See example. @ 10% you have 12W and at 1% you have 8.5W. If you wanted to be a typical "audiophile" you would proclaim this amp outputs 6W @ 0.05%.
Since we know it's a TA2020 design, it's easy to find out the "Audiophile" specs by looking at the datasheet.
Here we can see 12W continuous @ 0.1% THD with 22W peaks @ 10% THD for a 4 ohm load. A little too low power for my tastes.
Single Supply Operation
“Audiophile” Quality Sound
0.03% THD+N @ 10W 4Ω
0.1% THD+N @12W 4Ω
0.18% IHF-IM @ 1W 4Ω
13W @ 8Ω, 10% THD+N
22W @ 4Ω, 10% THD+N
38W EIAJ* VDD=14.4V @ 4Ω
*saturated square wave output
88% @ 12W 8Ω
81% @ 20W 4Ω
Dynamic Range = 103 dB
Up to 2X25Wrms @ 4Ω, VDD=14.6V
Mute and Sleep inputs
Turn-on & turn-off pop suppression
32-pin SSIP package
I have this amp and have been using it for a while now. It by no means is a power house but it does the job nicely for my application. It does sound clear, no thunderous bass but I blame that on my speakers. The only thing that is a negative is that it is has a really high, low voltage cutoff. Meaning if you want to listen to the music with the car off, not really going to happen, as it overloads easily due to low voltage thought by it. This is kinda a pain seeing the computer would shut it off anyway, but I assume it is the chip caracteristicts. I don't get any motor noise from it, just from my onboard soundcard, a ground loop thing is my temp fix.
hope this helps