very interesting.... $39 amp gets good review

[corwin99]

Problem of course with NiMH is the voltage is only 1.2v per cell.. less voltage drop at high current though.

This one could work:
http://www.partsexpress.com/pe/showd...umber=120-1135

Only about $20US and its 13.5v... should give it a bit more juice too. The max is 13.8v right?

[psonic]

Yes, I would think that part work, but the T-Amp adapter is the same price so tough call...

Did RGA contact you about your amp loan offer? I'm very much looking forward to his feedback on it...RGA, you still following this thread?

[corwin99]

He did not... however i have another interesting peice of news. I will be getting a pair of Radii KT88 15Watt SETs next week... I will be able to compare the two.

[niknik]

That's cool corwin99..!

What would be the most solution for powering the SI T-amp?
How many Volt? mah? Battery or power supply?

-a guy on headfi says that it would probably be the best to power it from batteries - rechargeable car-batteries as the best?

[corwin99]

A Car battery would certainly provide Stable, clean, hi current power... Might be a bit impractical though.

I don't know what method would be best, since i have only tried using a 1000mA Transformer. I have not even tried the batteries yet!

[niknik]

A Car battery would certainly provide Stable, clean, hi current power... Might be a bit impractical though.

I don't care.. I would just place it in my kitchen-closet next to the computer

any news?

I just recieved a couple of t-amps -for the price I am really impressed........................!

[corwin99]

Nothing new here.. When i get the Monoblocks i will compare. Are you powering the SI's with a car battery?

[niknik]

nope.. not yet anyhow... I managed to fry on up though -used it with an old power supply I had lying around. Should have been ok though -I just think i jammed it up too much maybe.. I didn't clip though -suddenly it was just dead.. I've got 2 more though -so I'm ok for now ;-)

On headfi a guy have tried with 3 different power supplies -but fresh batteries was still the best result soundwise..

[corwin99]

nope.. not yet anyhow... I managed to fry on up though -used it with an old power supply I had lying around. Should have been ok though -I just think i jammed it up too much maybe.. I didn't clip though -suddenly it was just dead.. I've got 2 more though -so I'm ok for now ;-)

On headfi a guy have tried with 3 different power supplies -but fresh batteries was still the best result soundwise..

hmm.. interesting. Yeah you can fry it with too much voltage from the power supply. I will have to try batteries for sure.

[niknik]

I plugged the Power supply into where the batteries was connected to start with.. Was that a mistake? I guess not? From what I can see on diyaudio -the guy that modded it there seems to be doing the same (of what I can see in the schematics he made -and the picture of the modded unit itself..)

[vr6ofpain]

I figure for $40.00 or less you can't go too wrong. I should think it would work better on my speakers than most - while I do have this skepticism of it - what the hell - i was skeptical of the Little RAT phono stage too and it's a stonking good little phono amp. And hey the AX Two is 1/4 the price of a lot of other speakers and IMO is clearly better - price and quality don;t always go hand in hand and this thing - well if they;re trying for a SET sound --- IMO that;s the RIGHT sound to be going after --

2.5 lbs regular mail I should not get hit for duty - is there anywhere I can buy it online? I'm currently evaluating a Skylan turntable base so that comes first but school is piling up too.

My Wharfedales are 95db 8 ohm beasties too - and I would not mind getting rid of that Marantz 4300 which is a giant dust collecting paper weight. Why do I not take my own advice and NOT buy a receiver *shakes heads rolls eyes.* Oh well two years left on the warranty I should be able to offload it. Hell if this Class T amp is ONLY as good as the receiver it would be worth it at 1/10 the price.

3 things I am curious about:

1) This Class T amp
2) "Little Rat phono stage"(is it cheap?)
3) Those stick on speakers @ Target

[vr6ofpain]

Is this "Rat phono stage" the one you find if you search "phono preamp" on radioshack's site?

also, I have a 12.0V 4.0ah sealed lead acid in my closet. I bought it to power my custom road bike light, a 20watt MR16 spot bulb.

Do you think this would fry the bastard? 4.0ah = 4000mah right...?

[corwin99]

Is this "Rat phono stage" the one you find if you search "phono preamp" on radioshack's site?

also, I have a 12.0V 4.0ah sealed lead acid in my closet. I bought it to power my custom road bike light, a 20watt MR16 spot bulb.

Do you think this would fry the bastard? 4.0ah = 4000mah right...?

The Rat Phono Stage is indeed the unit from Radio Shack.

As for whether the 12.0V 4.0ah battery will fry the bastard-- if you are referring to the Sonic Impact T-Amp, no it should not. The 4.0ah (or 4000mah) refers to the amount of charge it holds, which does not affect the amount of voltage. The voltage is what you have to worry about 12V will be fine.

[vr6ofpain]

do you think the 12.0V's is a little less than ideal? Didn't someone say that the adapter runs at 13.8V?

though if it runs off of 8 AA batteries(1.5V), isn't that 12 volts...?

[Bill K Davis]

What are the speaker connectors on this amp, and can anyone recommend decent, cheap, efficient speakers for it? I have a super mini-system in mind.

[corwin99]

Yeah.. it runs off 12V but it can go up to something like 13.8V or so if the supply is tightly regulated. The Speaker connectors are spring terminals. Crappy small dinky ones.. as far as recommending anything for it, i still am not that impressed with it, so i will hold off any recommendations... of all my speakers, the Klipsch RB-5 MKII's sounded the best with it. Sensitivity of 96db.

[vr6ofpain]

went to my local target. they didnt have it. the only thing they were selling was a two piece speaker system with somekind of an amp. it was a set for $19. the only thing was that the speakers were not the ones you mount on to anything, but premade ones, cardboard squares. and i assumed the smaller in line amp wasn't as nice as the 15watt one. I almost bought it for $15, but then decided not to.

i will pick up at least a couple of those stick on pads if I find them.

[RGA]

Yeah.. it runs off 12V but it can go up to something like 13.8V or so if the supply is tightly regulated. The Speaker connectors are spring terminals. Crappy small dinky ones.. as far as recommending anything for it, i still am not that impressed with it, so i will hold off any recommendations... of all my speakers, the Klipsch RB-5 MKII's sounded the best with it. Sensitivity of 96db.

I would not mind borrowing this from you if I may. I can;t for the next week or so because I have tons of homework - but perhpas I could meet you some place like Chapters.

Even though speakers can be sensitive some speakers have deeper impedence swings - my J's are an easier load than the E's so despite the fact that the E's are more sensitive they may actually be tougher to drive as the frequency esponse of the E has a 3.6ohm dip from 80hz right through the midbass to 200hz. Ie; a low powered amp would have trouble with the bass.

[vr6ofpain]

FEATURES • Class-T architecture • Single Supply Operation • “Audiophile” Quality Sound 0.04% THD+N @ 9W, 4. 0.18% IHF-IM @ 1W, 4. 11W @ 4., 0.1% THD+N 6W @ 8., 0.1% THD+N • High Power 15W @ 4., 10% THD+N 10W @ 8., 10% THD+N • High Efficiency 81% @ 15W, 4. 88% @ 10W, 8. • Dynamic Range = 102 dB • Mute and Sleep inputs • Turn-on & turn-off pop suppression • Over-current protection • Over-temperature protection

[vr6ofpain]

why not just pick up the t-amp there too!

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

[psonic]

went to my local target. they didnt have it. the only thing they were selling was a two piece speaker system with somekind of an amp. it was a set for $19. the only thing was that the speakers were not the ones you mount on to anything, but premade ones, cardboard squares. and i assumed the smaller in line amp wasn't as nice as the 15watt one. I almost bought it for $15, but then decided not to.

Are you talking about the set that comes with the triangle cardboard speaks, the amp & the bag? This is the 15w T-Amp in this kit, regular price should say 49.99...

http://www.target.com/gp/detail.html...sin=B00009W44A


RGA, glad you are going to audition it, looking forward...

[corwin99]

I would not mind borrowing this from you if I may. I can;t for the next week or so because I have tons of homework - but perhpas I could meet you some place like Chapters.

Even though speakers can be sensitive some speakers have deeper impedence swings - my J's are an easier load than the E's so despite the fact that the E's are more sensitive they may actually be tougher to drive as the frequency esponse of the E has a 3.6ohm dip from 80hz right through the midbass to 200hz. Ie; a low powered amp would have trouble with the bass.

Yes, the Klipsch RB-5's have a a similar dip at the low frequencies... Sure, no problem. Chapters works for me.. very close to my house. Send me an email at corwin at island dot net and we'll arrange something.

Damn i wish i knew that was selling at partsexpress i could've bought it there for much less money.

[vr6ofpain]

Are you talking about the set that comes with the triangle cardboard speaks, the amp & the bag? This is the 15w T-Amp in this kit, regular price should say 49.99...

http://www.target.com/gp/detail.html...sin=B00009W44A

No they had this one for $17.99(same price as online, I dont know why I quoted two prices in my first post?? ), but it was clear/red....UGLY!!
http://www.target.com/gp/detail.html...sin=B000087H9W

[psonic]

No they had this one for $17.99(same price as online, I dont know why I quoted two prices in my first post?? ), but it was clear/red....UGLY!!
http://www.target.com/gp/detail.html...sin=B000087H9W

OK, that is the wrong one. Are there any other Targets nearby? Maybe you could give them a call, or just order online...

[vr6ofpain]

OK, that is the wrong one. Are there any other Targets nearby? Maybe you could give them a call, or just order online...

Wow. Well I guess your memory doesn't serve you well.
I will quote the post that you originally replied to:

went to my local target. they didnt have it. the only thing they were selling was a two piece speaker system with somekind of an amp. it was a set for $19. the only thing was that the speakers were not the ones you mount on to anything, but premade ones, cardboard squares. and i assumed the smaller in line amp wasn't as nice as the 15watt one. I almost bought it for $15, but then decided not to.

i will pick up at least a couple of those stick on pads if I find them.

So yes, there is one, but as I already said, I went to my "local" one, and they didn't have the t-amp of speaker pads. But instead they had the one set that I posted a picture of.