Anyone used or listened Zapco i-4100 ?

[SPL BRONCO II]

Originally Posted by atoprak Hi Guys, I have bought Audison Lrx 4.1k. it brings clean and constant (12-14V) 2*130 + 1*500w (bridge mode) which will be more than enough for my speakers ... Thanks for your help...

Congrats, that is a very nice amp.

[bassfreak]

awesome amp.. drools..

[atoprak]

Hi,

I have installed the amp today.

There is strange situation about gains of the amp. I have decided to play safe for the amp today. I use multimeter, 1khz and 50hz sine wave signals for gain adjustments. I set the gains for Channel A to 18v output while as for the sub channel I set 34V. The idea is getting 2*80+300w rms from my speakers ...

Now the gains are set to %70 for mid channels and %80 for sub channel.It seems pretty high for me, because I am not even using the full power of the amplifier yet.. but the gains are so high at the moment.. The preout voltage of my HU is 2v ... I think there is relationship but now %100 sure about that..


What do you think ?

[lilweezyana]

Originally Posted by atoprak Hi, I have installed the amp today. There is strange situation about gains of the amp. I have decided to play safe for the amp today. I use multimeter, 1khz and 50hz sine wave signals for gain adjustments. I set the gains for Channel A to 18v output while as for the sub channel I set 34V. The idea is getting 2*80+300w rms from my speakers ... Now the gains are set to %70 for mid channels and %80 for sub channel.It seems pretty high for me, because I am not even using the full power of the amplifier yet.. but the gains are so high at the moment.. The preout voltage of my HU is 2v ... I think there is relationship but now %100 sure about that.. What do you think ?

What is the amp's input sensitivity?

[drozzy]

Originally Posted by atoprak Now the gains are set to %70 for mid channels and %80 for sub channel.It seems pretty high for me, because I am not even using the full power of the amplifier yet.. but the gains are so high at the moment.. The preout voltage of my HU is 2v ... I think there is relationship but now %100 sure about that..

Originally Posted by lilweezyana What is the amp's input sensitivity?

http://www.woofersetc.com/p8332/LRx-...-Amplifier.htm

That LRx's input voltage is 24 - 1.4 V rms as per specs. 2V preouts, 70-80% should be in the ballpark.

[atoprak]

Originally Posted by lilweezyana What is the amp's input sensitivity?

Woofersetc is not correct.

Both lrx 6.9 and 4.1k has the same sensivity which is 0.3-5v ...

[drozzy]

Originally Posted by atoprak Woofersetc is not correct. Both lrx 6.9 and 4.1k has the same sensivity which is 0.3-5v ...

Is there a low/high sensitivity input switching button on the amp?

(24V / 5V) = (1.44V / 0.3V)

[atoprak]

Originally Posted by drozzy Is there a low/high sensitivity input switching button on the amp? (24V / 5V) = (1.44V / 0.3V)

no, none... actually where have been you been figured out this 24 ?


I have checked the specs from tech sheet of audison website..

[drozzy]

Originally Posted by drozzy http://www.woofersetc.com/p8332/LRx-...-Amplifier.htm That LRx's input voltage is 24 - 1.4 V rms as per specs.

Originally Posted by atoprak no, none... actually where have been you been figured out this 24 ?

"Speaker-In sensitivity: 1.4 - 24 VRMS"

From Woofers' website, as stated previously. However, it may not be for the same gen as yours, I don't know.

Their rep was on here the other day defending the authenticity of the specs they list - straight from manufacturers apparently.

[atoprak]

Originally Posted by drozzy "Speaker-In sensitivity: 1.4 - 24 VRMS" From Woofers' website, as stated previously. However, it may not be for the same gen as yours, I don't know. Their rep was on here the other day defending the authenticity of the specs they list - straight from manufacturers apparently.

Shall we look at input sensivity or Speaker-In sensitivity ? ....

I think we should look at input sensivity .. which is vvery much related with gain settings.. or am I wrong ?? ??

That should be related wtih high level inputs... like speaker output of the HU ... but I am using low level input....

[drozzy]

Originally Posted by atoprak Shall we look at input sensivity or Speaker-In sensitivity ? ....

Hahaha!

Yep. I was out to lunch.

So your gains are at 70-80% w/ a max sensitivity of 0.3V? For a 2V preout HU, that's pushing it. If your gain setting method was legit, the damn thing does like 1.1-1.3V rms at full unclipped output.

[atoprak]

Originally Posted by drozzy Hahaha! Yep. I was out to lunch. So your gains are at 70-80% w/ a max sensitivity of 0.3V? For a 2V preout HU, that's pushing it. If your gain setting method was legit, the damn thing does like 1.1-1.3V rms at full unclipped output.

I am totally confused... 0.3-5v should be range of the input sensivity.. I mean at full volume of the hu, the preouts should be at 2v.


If we assume that my deck outputs are 4v, than the gains should be lower... right ? ..

[drozzy]

Originally Posted by atoprak I mean at full volume of the hu, the preouts should be at 2v.

Yeah, or around 1.7-1.8V rms at the volume lvl on the HU just under the point where clipping kicks in.

Originally Posted by atoprak If we assume that my deck outputs are 4v, than the gains should be lower... right ? ..

Right.


edit: http://bcae1.com/gaincon2.htm

[atoprak]

Originally Posted by drozzy Yeah, or around 1.7-1.8V rms at the volume lvl on the HU just under the point where clipping kicks in. Right. edit: http://bcae1.com/gaincon2.htm

I will read the all contnets in the link when I get home. The information looks detailed ... But actually it seems that nothing wrong in my setup....

Actually in the current configuration I can listen music very laudly (at 55/62 volume level) without any distortion .. and after 15min listening, the amp gets warm not hot ...