using sonic impact amp for hivi b3s

[jaygeorge1979]

Hello

i beleive i read somewhere that this little amp:

http://www.partsexpress.com/pe/showd...number=300-952

which is rated at 10 W per channel @ 8 ohm would be a good companion to the hi-vi b3s 3 inch full range speakers...i am going to be using them with my computer so extremely high volume isnt necessary...i still feel like maybe it wouldnt be enough to push them efficiently? anyone agree/disagree?
by the way, the speakers are rated 15 W RMS and they are 8 ohms

thanks guys

[boydon_lepasci]

Did you also see this version?

http://www.partsexpress.com/pe/showd...number=300-956

It comes with many of the upgrades you will read about if you search the Class D forum. If you don't have the time or skills, this is worth considering.

In regard to the driver, here is an excellent design which also happens to mention the T-Amp:

http://www.zaphaudio.com/audio-speaker18.html

Hopefully this answers your question.

[jaygeorge1979]

the t-amp u linked is way out of my price range...i was referring to the sonic impact portable t-amp, the partsexpress.com price for it is 30.00...i cant figure out why the one you showed me is SO much more expensive....same power rating right?

and yes, you answered my question

[boydon_lepasci]

The short of it is: you get what you pay for. If you read the threads on the Class D forum, you will see how much time and money people are putting into the version you linked to so that they can stand to listen to it for any length of time. The version I linked to already has many of the modifications for quality and convenience made for you, thus the higher cost. My ears really aren't so golden and I might be happy with the "stock" version. I don't have any experience with nearfield listening on a fullrange driver either. The amp could play a larger role here.

[jaygeorge1979]

good point...i figured out a way to use my mini system to power them, so i am actually not going to worry about the Tamp , at least not for awhile...thx to all replies!

[JWFokker]

Originally posted by boydon_lepasci
The short of it is: you get what you pay for. If you read the threads on the Class D forum, you will see how much time and money people are putting into the version you linked to so that they can stand to listen to it for any length of time. The version I linked to already has many of the modifications for quality and convenience made for you, thus the higher cost. My ears really aren't so golden and I might be happy with the "stock" version. I don't have any experience with nearfield listening on a fullrange driver either. The amp could play a larger role here.

It sounds quite excellent in stock form. It just lacks a bit in the bass department. Because of the input filter, bass roll off starts at 70hz. By bypassing the stock input capacitor and using something larger and if you want to get fancy, something better like a film capacitor, in it's place (2.2-3.3uf), you can completely eliminate bass roll off. And replacing the stock power capacitor with something like a 2200uf Panasonic FM cap for a $1-2 from Digikey will tighten up the bass. It's extremely listenable in it's stock form though. Modding is not necessary and will be a big step above most mini systems.

Any harshness in the treble goes away after a few hours of listening. The amp only gets better as it burns in. It's much smoother as time goes on.

[BassAwdyO]

just got my sonic t-amp and I'll say it was worth every penny of the ~30 bucks I paid for it

might be a useful model for biamping... if it needs modification for bass then you can just do one channel(I have yet to try it out on some good sized speakers).