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Secondhand setup, first amp, advice welcome

post #1 of 9
Thread Starter 
Hi guys,

I recently bought myself a cheap second (third?)hand audio setup and would like your comment on it.

I picked up an old Pioneer SA-620 amp and two 6Ohm Akai speakers and so far I'm quite happy with the setup. One of the speakers had a membrane that had come loose (the part between the coil and the cone), causing it to make annoying noises when the bass got too heavy. I have since fixed that with some superglue and that appears to have solved it. I know Akai isn't the best brand of speakers I could get, but they were cheap, and the only ones I could find locally that would not blow up if attached to my amp.

Alternatively, I'm using my Grado SR80i hooked up to the amp, which is recommended by a lot of people (supposed to boost the bass and dynamics a bit).

Now I've hooked up the amp through my PC's soundcard (Asus supremeFX II) with the front-out (it doesn't have a line-out), and my PC set to 50% volume. The amp receives this signal through a 3.5mm -> stereo tulip plugs, hooked into the AUX input. Is this the correct way to set it up?

I know this probably won't impress you lot, but I got the whole set for ~30 bucks so I'm quite happy with it smile.gif

Here's a picture of the setup:

WalXn.jpg
    
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post #2 of 9
Looks fine to me, and that's the way most people hook up their amps to their computers so everything is probably hooked up right as well...

You may want to experiment with different volume settings on the computer. Depending on the signal/noise ratio of the amp, you may get a better performance from the amp if you give it higher line level signal strength, so that you can achieve equal listening levels with less gain through the amp required. When you starve an amp of input signal, you are forced to turn the gain way up to overcome the low signal. Many modern amps are so dead silent that this just wouldn't matter, however, older amps, like I am assuming the one pictured here is, tend to hiss when the gain is cranked up.


The only part that I don't understand is...
Quote:
...and the only ones I could find locally that would not blow up if attached to my amp...

I smell misconception smile.gif
Edited by mdocod - 1/7/12 at 4:15pm
     
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post #3 of 9
Thread Starter 
Well the amp is rated for 6-16 Ohm speakers. The other speakers I found were 2 or 4 Ohm, which would be too much power for the speakers, right?
    
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post #4 of 9
Retro amps are awesome, I love mine lol

Personally I set my PC volume to 100%, but I don't think it makes much of a difference.
Quote:
Originally Posted by citruspers View Post

Well the amp is rated for 6-16 Ohm speakers. The other speakers I found were 2 or 4 Ohm, which would be too much power for the speakers, right?

It will work but if you turn the volume up too high you run the risk of your amp overheating
Edited by AgentHydra - 1/7/12 at 4:21pm
     
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post #5 of 9
Quote:
Originally Posted by citruspers View Post

Well the amp is rated for 6-16 Ohm speakers. The other speakers I found were 2 or 4 Ohm, which would be too much power for the speakers, right?

no that just means you couldnt crank it up without blowing them is all.
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post #6 of 9
fail post
     
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post #7 of 9
Thread Starter 
Thanks for clearing it up guys.

Speaking of the amp overheating, the amp is passively cooled, the case is slotted on about 25% of the top surface, and the sides. Now my monitor covers most of the top area, will this be dangerous or will the side slots provide sufficient cooling? It often gets hot in my room.
    
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post #8 of 9
Quote:
Originally Posted by citruspers View Post

Well the amp is rated for 6-16 Ohm speakers. The other speakers I found were 2 or 4 Ohm, which would be too much power for the speakers, right?

Choosing speakers with a lower impedance (higher load) than the amp is rated for can increase the risk of over-heating the amplifier.

In the real world, unless you listen at extraordinarily high levels for long sessions on a hot summer day, it's unlikely that the amp would be damaged by driving a lower impedance load than it is rated for. (within reason). Most solid state amps are pretty forgiving on the matter.
     
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post #9 of 9
Thread Starter 
Alright. Good point about the gain and hiss. I just checked it and I started hearing any hiss at 75% pc volume, 6/10 amp volume (which is just barely what my ears can handle for power listening).
    
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