Sonic Impact Class T $39 amplifier review at 6moons

grkn · « **Reply #160 on:** 22 Jan 2005, 11:16 pm »

People are raving about that 13.8v is better, but I only have access to 12V 7A batteries. How can I increase the voltage? By serial coupling it with a 1.8V 1A battery?

Vinnie R. · « **Reply #161 on:** 22 Jan 2005, 11:21 pm »

Quote from: grkn

People are raving about that 13.8v is better, but I only have access to 12V 7A batteries. How can I increase the voltage? By serial coupling it with a 1.8V 1A battery?

When your 12V SLA battery is fully charged, it is usually around 13.2V. I do not recommend you use any voltage above 13.2V (as mentioned in the Tripath datasheet).

If you put a AA battery in series, it will probably degrade the performance due to the addition of a higher series resistance.

-Vinnie

Jose Garcia · « **Reply #162 on:** 23 Jan 2005, 02:01 am »

Saludos!!!

Hey, Vinnie!! Congratulations on your Clari-T unit

you have a winner!!

Regarding to the stock SIT, the way to go is buying this unit with a 12V Sealed Battery and the corresponding charger. Add the needed cables and that's it?

I just posted about it at a South American Forum ( a fantastic one !!) and my friends can't believe it. This amp is kind of ground shaker to some manufacturers

Thanks,

Jose.

Jose Garcia · « **Reply #163 on:** 23 Jan 2005, 02:34 am »

Take a look at this

http://mywebpages.comcast.net/ampbox/page2.html

Jose.

gary · « **Reply #164 on:** 23 Jan 2005, 02:50 am »

Quote from: Jose Garcia

Take a look at this

Jose.

That thing is pretty crazy. I have no idea how the guy is able to sell the thing for $50, there's got to be an easy four or five hours of machining, welding and polishing required to build it. Personally I'd still rather have Vinnie's version, as he's added better components and includes the charger & battery plus there's no assembly or wiring required. Still though, you could go this route and have a battery-powered t-amp in a nice enclosure for just over a hundred bucks. Not bad at all.

Gary

corwin99 · « **Reply #165 on:** 23 Jan 2005, 02:59 am »

Damn that is one hell of an enclosure!! too bad it doesn't look like it could fit an SLA in it.

grkn · « **Reply #166 on:** 23 Jan 2005, 03:20 pm »

Quote

When your 12V SLA battery is fully charged, it is usually around 13.2V. I do not recommend you use any voltage above 13.2V (as mentioned in the Tripath datasheet).

If you put a AA battery in series, it will probably degrade the performance due to the addition of a higher series resistance.

So, when using a 13.8V batteri it would actually be a 15V one when fully charged? I guess 15V wouldn't kill it but it might overheat?

I have 88db speakers, would I gain more by upping the voltage than people with 100db speakers? Ofcouse, 13.2V is probably enough.
I'm not sure that there is any real gain of using more voltage than that.

One more thing, is there any point in using thicker wire than this?

Maybe about 2mm^2? should be fine.

Anyhow, will measure battery voltage after fully charging it.

EDIT:
Ladida, burned my poor Sonic Impact, coupled the polarity wrong after improving the battery cable on the picture.
Bzzzzt! *smoke*

I don't think it's usable now?
So, remember, positive in center, negative around the barrel is correct.

But how could I have know I was wrong?

doug s. · « **Reply #167 on:** 23 Jan 2005, 08:27 pm »

Quote from: grkn

...EDIT:
Ladida, burned my poor Sonic Impact, coupled the polarity wrong after improving the battery cable on the picture.
Bzzzzt! *smoke*

I don't think it's usable now?
So, remember, positive in center, negative around the barrel is correct.

But how could I have know I was wrong?...

use a multimeter to check continuity prior to plug-in...

doug s.

grkn · « **Reply #168 on:** 23 Jan 2005, 08:50 pm »

contiwhat?
I used a multimeter, and figured out that negative center should be right.

doug s. · « **Reply #169 on:** 23 Jan 2005, 09:20 pm »

Quote from: grkn

contiwhat?
I used a multimeter, and figured out that negative center should be right.

not sure what yure saying. all i meant is that you could use the multimeter to make sure you had continuity from the positive battery terminal to the center of the pin, & from the negative battery terminal to the outside barrel...

if yure saying you originally *thought* the center pin should be negative, & purposely hooked it up that way, well that's different. i thought it was awreddy determined somewhere in this forum that center pin was positive.

doug s.

grkn · « **Reply #170 on:** 23 Jan 2005, 09:31 pm »

Quote

if yure saying you originally *thought* the center pin should be negative, & purposely hooked it up that way, well that's different. i thought it was awreddy determined somewhere in this forum that center pin was positive.

precisely!

doug s. · « **Reply #171 on:** 23 Jan 2005, 09:35 pm »

Quote from: grkn

Quote
if yure saying you originally *thought* the center pin should be negative, & purposely hooked it up that way, well that's different. i thought it was awreddy determined somewhere in this forum that center pin was positive.

precisely!

oops! i hope it was only a $39 stock amp ya fried & not a spendy modded one!

doug s.

grkn · « **Reply #172 on:** 23 Jan 2005, 09:47 pm »

Only a regular one, so, where can I buy a new one (that will ship it to Norway?). Thinkgeek is currently out

corwin99 · « **Reply #173 on:** 24 Jan 2005, 05:54 am »

I got a chance a chance to listen those Tannoys with the Sonic Impact.. and also with the Avantgarde Trio!! Holy Crap!! My first real review, sso be nice

check it out http://www.audiocircle.com/index.php?topic=16202

grkn · « **Reply #174 on:** 24 Jan 2005, 09:02 am »

btw, do you think it is just burnt or broken? hehehe.

corwin99 · « **Reply #175 on:** 24 Jan 2005, 03:49 pm »

corwin99 · « **Reply #176 on:** 24 Jan 2005, 03:50 pm »

I accidently toasted my first one using a power supply that had the inner pin negative not knowing it. I returned it and the guy told me the chip was toast... I purchased mine right from SI-5

gonefishin · « **Reply #177 on:** 25 Jan 2005, 07:10 pm »

Well, I just got off the phone with ecost...they currently have over 200 customers for the SI T-Amp on back order!

I wonder where the heck I am

Bingo · « **Reply #178 on:** 25 Jan 2005, 08:49 pm »

I have some (don't laugh) tweeked out Klipsch KLF-30's and I was looking for some assistance on using one SI per channel, with each amp channel going directly to the mid-horn and the tweeter-horn using some type of unobtrusive X-over at each amp's inputs. I would love to mount the amps internally to keep them as close to the voice coils as possible, scrap the passive X-overs and use the volume controls to balance out the system. I would be using a larger amp for the twin woofers. Any suggestions for keeping the purity of signal with minimal circutry?

corwin99 · « **Reply #179 on:** 27 Jan 2005, 07:53 pm »

Quote from: Bingo

I have some (don't laugh) tweeked out Klipsch KLF-30's and I was looking for some assistance on using one SI per channel, with each amp channel going directly to the mid-horn and the tweeter-horn using some type of unobtrusive X-over at each amp's inputs. I would love to mount the amps internally to keep them as close to the voice coils as possible, scrap the passive X-overs and use the volume controls to balance out the system. I would be using a larger amp for the twin woofers. Any suggestions for keeping the purity of signal with minimal circutry?

No laughing here.. i actually found that the best speakers i had for the SI was a pair of Klipsch RB-5 MKII's.

Are you trying to Vertically Biamp Your Klipsch KLF-30 horn portions with 2 SI's and using an Active Crossover? and then drive the woofers with another amp? Sounds interesting.. and complicated

with the Sensitivity of the Klipschs i don't think you'd need any more power than one of those SI's for the whole deal... adding a second SI and an additoinal amp would kind of contradicts your original goal of mimnizing circuitry.