I had this running for years in my old car running at 1 ohm powering 3x jl w6-v1 6ohm subs. It sounded so amazing and the w6 has had no problem with the power.

I still have my 800a2, and 800a4, both brand new in the box! I have had several, of both of these amps, from back in the day! One day I might, take these down, from storage

My favorite amp i had. Nice to see the the power version. I upgraded to bd1501 after this. Both were great!

@audiokeller1975

Жыл бұрын

bd 1500.1 is one of the next videos 👍

@bustyouup4free

Жыл бұрын

@@audiokeller1975 that's pretty cool. Can't wait to see this. I have a bd501 now with JL 8w7. That's all my wife will allow 😂

@audiokeller1975

Жыл бұрын

😄🤣🤣😁😁👍

Keep up the great work!! Enjoy your videos and tests, pretty much the only way to do real test.

@audiokeller1975

Жыл бұрын

Thanks again for a motivating comment!!!!

That’s great power for around 1999.

@audiokeller1975

7 ай бұрын

It’s conservative power - there are still speakers around which produce high SPL with less power. Especially in todays car audio section there are woofers with high power handling , they feature big voicecoils, heavy cones and very big magnets with a nice cooling system to handle lots of power but in most cases the downside is low efficiency which makes lots of power / bigger amps necessary to reach high spl . I think it’s still amazing what some audio systems were able to do with less power input from small oldschool amps - way smaller than this 800a2 👍😃 music Styles were also a bit different

Very nice amplifier! 🤘💯🇺🇲🇺🇲

@audiokeller1975

Жыл бұрын

yes. i really like these amps. they sound nice with plenty of power and headroom 👍

@charlespetersonii6989

Жыл бұрын

@@audiokeller1975 You should try a Power 500m. You will be shocked! 😎

@audiokeller1975

Жыл бұрын

i already did 😊 I dynoed the 250M which is the 96 model of the 500M. Its unbelievable what they put out if linked together but i dynoed only one amp - too bad i sold the other one before i had the idea to make amp dyno videos 😭😭😭🤣🤣🤣

@charlespetersonii6989

Жыл бұрын

@@audiokeller1975 You taught me something new. I did not know the 250m was the same as 500m! 👌

@audiokeller1975

Жыл бұрын

it has very little differences in the way the status display is connected. with the 96 model you dont need an extra adapter👍 in 2018 i fixed a 250M and after deeper looks into the schematic its the same amp😁

🤘🤘🤘🤘🤘🤘🤘freaky awesome power🤯🤯🤯

@audiokeller1975

Жыл бұрын

Cant imagine that lightweight amp manufacturers measure with 8 cycles. nobody had the idea to do this back in the days. to compare yesterdays amps to the lightweight amps of today makes a redyno of yesterdays amps necessary 👍

@saschacubexyz

Жыл бұрын

@@audiokeller1975 it's exciting. Old against new. The new Amps are definitely afraid of these tests 😉😉😉😬😬😬 which one sounds better is more important😎

I don t understand that machine and how it measures the watts please explain how it works so we understand clearly all i understand is there is a sound wave on the screen

@audiokeller1975

Жыл бұрын

let me try to explain it with my words: the machine is called a scope which can make AC voltage visible. that scope is connected to the amps outputs. instead of a speaker there is a big power resistor connected to the amps output ( this is a harder load for the amp than a speaker ) i give a sinewave via RCA input with a headunit into the amp and drive the signal to the clipping point. That is the point where the amp is at its outputpower limits. i measure the voltage and divide it by the used resistor. lets say we have a 4 ohm load and we get 50 volts RMS unclipped out of the amp. power is calculated: voltage * voltage divided by impedance in ohms. that means in our example : 50*50 / 4 = 625 watts. RMS = peakvoltage / 1.414. with the scope i just monitor the voltage until it reaches the clipping point. With a big amounr if clip the RMS value goes up. this has to be avoided because a clipped signal is dirty and sounds bad and destroys speakers sometimes. i hope i was able to explain it. If not let me know and ask your questions👍

@kurtulustourism

Жыл бұрын

@@audiokeller1975 thanks for your reply whan you are doing the test show the person that is watching in detail with a calculator in your hand and point everything out and show everything so the person watching understands 100 percent clearly what you are doing think that the person has no idea what is what machine and how it works =)

@audiokeller1975

Жыл бұрын

Good idea! i think i will make a short video how to make the calculations like a tutorial for all tests. i always try to keep my videos as short as possible. with an extra video i can still keep them short. Check out my older videos, if i remember correct i had the formulas and calculations in there 👍

@kurtulustourism

Жыл бұрын

@@audiokeller1975 there is much much more that will attract people that as a watcher my self and experience that I had in the industry I will try to help on the missing pieces to your good vedios my friend

Hello. I had the Punch 800a2 amp years ago, and it sounded awesome! The birth certificate said 982W total at 2 ohms, all channels combined. Is this Power 800a2 amp better, or more powerful, than the Punch 800a2? Is there any difference? Thanks, nice video!

@audiokeller1975

Жыл бұрын

The only difference of both amps is the slope of the input filters. 800a2 has 12db per octave and power has 24db per octave, that’s just a slight difference, but no difference in output power.

@charlesbolano7148

Жыл бұрын

@@audiokeller1975 Ok got it, thanks. Some other guy tested this same amp 2 yrs ago, and he only got 556W 8 ohms mono, and 811W 4 ohms mono! He ran the test again at 1khz, and got even lower numbers! How can this be? He ran the tests at 14 volts, and still got less power?? I was planning on buying one of these, but now I'm not so sure.

@audiokeller1975

Жыл бұрын

There is a difference in continuous and dynamic 1kHz test. Dynamic Power is printed in the birth sheets. Can you be more specific and point me to this test? After all these years it’s also possible that some of the big caps are starting to die and don’t store the same amount of energy like 20 years ago. Nothing wrong with buying this kind of amplifier-they are 👍

@charlesbolano7148

Жыл бұрын

@@audiokeller1975The test was done by "HifiVega" here on youtube, 2 yrs ago. He doesn't specify, but I think it's continuos power. In both 40hz and 1khz tests, the power rating results are lower than yours! His best results are 556W mono 8 ohm, and 811W mono 4 ohm. Over 100W less, than your test results! He also says the Punch 225.2 amp, is almost as powerful as the Power 800a2, which I don't believe! Thanks.

@audiokeller1975

Жыл бұрын

I know this test and it was continuous. The dynamic headroom of these amps is amazing because we don’t listen to sinus signals which have a crest factor of 3db, Musik has much higher crest factors and that’s when the Rockfords sound so amazing because they deliver lots of dynamic headroom 👍 todays pro audio amp manufacturers don’t rate with continuous power in most cases. They simulate different crest factors with different Burst signals which leads to much higher values because continuous is the hardest way to test an amp especially on fixed resistors which are way harder load than speakers which have impedance which are frequency depending! Continuous shows how strong the amps power supply is and you can compare amps only if tested equal. An amp which has 100 watts continuous but no dynamic headroom will not sound better than an amp which has 80 watts but 3 db of dynamic headroom ( 160watts for a short time )! That’s the reason why they are sounding great 👍