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Car Audio Equipment
Amplifiers
Is my amp powerful enough?
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<blockquote data-quote="RSDXzec" data-source="post: 7614241" data-attributes="member: 638347"><p>Well all I've measured so far is:</p><p></p><p>I put a 50hz tone in the head unit at max volume.</p><p></p><p>(185x4)^1/2 = 27.2V</p><p></p><p>Without the speakers connected I set it to 27.2V</p><p></p><p>but with them connected I get a reading of 23.8V or thereabouts.</p><p></p><p>I don't understand why this voltage drop is occurring, because with a single 200WRMS sub the voltage didn't drop at all, or maybe a very small amount.</p><p></p><p>So with them connected I set the gain to 27.2V and it started to sound bad imo, then I disconnected them and it read about 40.7V.</p><p></p><p>So I decided to put them back down to the original 27.2V with the speakers disconnected. They don't hit as hard that way but atleast it doesn't sound at risk of breaking.</p><p></p><p>Cheers</p><p></p><p>edit:</p><p></p><p>Been looking on the net and I think it may be worth noting that with a single sub I use an 18 Gauge wire from the amp to the sub because I got one in my wiring kit.</p><p></p><p>With both subs connected I have a wire from the amp to the sub at 18 gauge and the wire connecting both subs in parallel is thinner, it doesn't say how thin it is but I could guess it would be around 24 gauge. (needless to say I will be replacing the 24g wire with a 18g wire as 24g is just way too small)</p><p></p><p>I'd also like to know what kind of voltage drop I'd see with 8ohm/2ohm impedance as opposed to 4ohm. I assume the voltage difference would be bigger/lower respectively.</p></blockquote><p></p>
[QUOTE="RSDXzec, post: 7614241, member: 638347"] Well all I've measured so far is: I put a 50hz tone in the head unit at max volume. (185x4)^1/2 = 27.2V Without the speakers connected I set it to 27.2V but with them connected I get a reading of 23.8V or thereabouts. I don't understand why this voltage drop is occurring, because with a single 200WRMS sub the voltage didn't drop at all, or maybe a very small amount. So with them connected I set the gain to 27.2V and it started to sound bad imo, then I disconnected them and it read about 40.7V. So I decided to put them back down to the original 27.2V with the speakers disconnected. They don't hit as hard that way but atleast it doesn't sound at risk of breaking. Cheers edit: Been looking on the net and I think it may be worth noting that with a single sub I use an 18 Gauge wire from the amp to the sub because I got one in my wiring kit. With both subs connected I have a wire from the amp to the sub at 18 gauge and the wire connecting both subs in parallel is thinner, it doesn't say how thin it is but I could guess it would be around 24 gauge. (needless to say I will be replacing the 24g wire with a 18g wire as 24g is just way too small) I'd also like to know what kind of voltage drop I'd see with 8ohm/2ohm impedance as opposed to 4ohm. I assume the voltage difference would be bigger/lower respectively. [/QUOTE]
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Is my amp powerful enough?
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