Thread: Bybyte.com's DTA45 Amp Good or Bad?

Originally Posted by nivanov

I agree with soundman, that if you have 4 speakers, it's better to just get a 4 channel amp. However, to be fair, the only "i've used it" response regarding dta45 indicated that it was pretty good.

I actually have 8 speakers in my vehicle, i just cant seem to find any specs on the speakers (i read all the speakers have 8 ohm's of resistance)?
Kind of odd to have 8 ohm speakers.

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.

Originally Posted by Sonicxtacy02

Looks like the DTA45 should be the next item i do a product review for. There's a lot of information on the board about it, but it seems for the most part negative and "specification" based. Lemme see if i can get one and compare it to my current audio setup.

i look forward to your review!!

Originally Posted by knownchild

I actually have 8 speakers in my vehicle, i just cant seem to find any specs on the speakers (i read all the speakers have 8 ohm's of resistance)?
Kind of odd to have 8 ohm speakers.

most cars use 2 or 4 ohm speakers, but there is no standard procedure, or spec for this, so car makers can use anything they want..

Originally Posted by nivanov

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.

yes, you would need to connect everything in series, and parallel to get the correct load on the amp-- you really need to familiarize yourself with the way that multiple resistances react in different connection methods to fully understand the correct connections..

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.
http://www.datasheetcatalog.org/data...h/mXyzxwww.pdf

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.

FEATURES
�� Class-T architecture
�� Single Supply Operation
�� “Audiophile” Quality Sound
�� 0.03% THD+N @ 10W 4Ω
�� 0.1% THD+N @12W 4Ω
�� 0.18% IHF-IM @ 1W 4Ω
�� High Power
�� 13W @ 8Ω, 10% THD+N
�� 22W @ 4Ω, 10% THD+N
�� 38W EIAJ* VDD=14.4V @ 4Ω
*saturated square wave output
�� High Efficiency
�� 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
�� Over-current protection
�� Over-temperature protection
�� Bridged outputs
�� 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

Originally Posted by smarty2

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

this is for amp9 or the dta45?

Originally Posted by soundman98

and it's class-t architecture means that it has a higher thd then a class-d or a/b amp, which rules it out as a "audiophile" quality amp...

i hardly doubt that anyone looking at this amp is going for audiophile quality (lacking the headroom for in car 'audiophile' installations for one). and as far as class-t amps not being audiophile. that is something to be debated since 'audiophile' isn't a set standard and there are some class-t amps out there that get amazing reviews by people much more picky then me. It's not only the amp. the source and speakers have a lot to do with it as well as other factors.