wiring an amp

[Chris]

I have a Kenwood KFCW-300S Sub that I am connecting to a SPLX SPLA350 Amp
using an Autoleads PC4-20 wiring kit.

The wiring kit comes with a 15, 20 and 30 Amp Fuse, should I use the 30, 20
or 10 Amp fuse for the amp live from the car battery?

[Marky]

Post by Chris
I have a Kenwood KFCW-300S Sub that I am connecting to a SPLX SPLA350 Amp
using an Autoleads PC4-20 wiring kit.
The wiring kit comes with a 15, 20 and 30 Amp Fuse, should I use the 30,
20 or 10 Amp fuse for the amp live from the car battery?

What fuse does the Amp have?

[Chris]

Post by Marky

Post by Chris
I have a Kenwood KFCW-300S Sub that I am connecting to a SPLX SPLA350 Amp
using an Autoleads PC4-20 wiring kit.
The wiring kit comes with a 15, 20 and 30 Amp Fuse, should I use the 30,
20 or 10 Amp fuse for the amp live from the car battery?

What fuse does the Amp have?

10 Amp

[Tim..]

Post by Chris

Post by Marky

Post by Chris
I have a Kenwood KFCW-300S Sub that I am connecting to a SPLX SPLA350 Amp
using an Autoleads PC4-20 wiring kit.
The wiring kit comes with a 15, 20 and 30 Amp Fuse, should I use the 30,
20 or 10 Amp fuse for the amp live from the car battery?

What fuse does the Amp have?

10 Amp

Are you sure?!

An amp with a 10a fuse is only going to give about 30w RMS max, and will be
of little use trying to power a sub.

Tim..

[Colin Stamp]

On Sat, 20 Aug 2005 18:10:23 +0000 (UTC), "Tim.."

Post by Tim..

Post by Chris
10 Amp

Are you sure?!
An amp with a 10a fuse is only going to give about 30w RMS max, and will be
of little use trying to power a sub.

Actually, all this talk of amp power ratings is a bit irrelevant. The
fuse at the source end is there to protect the wiring, so it's fine to
fit as big-a-fuse as you like as long as it's guaranteed to blow
before the wiring goes up in smoke. For example, if you're using 6mm^2
cable (which is good for 50A), the 30A fuse would be the best one to
go for. It has the lowest resistance of the three, so the least effect
on sound quality, but it'll still blow well before the cable catches
light. One thing you have to watch out for though, is that there
aren't any bits of thinner cable anywhere in the current path,
otherwise you'd need to down-rate the fuse to suit that cable.

The fuse in the amp, will obviously need to be whatever the
manufacturer was expecting.

Cheers,

Colin.

[Chris]

Post by Colin Stamp
On Sat, 20 Aug 2005 18:10:23 +0000 (UTC), "Tim.."

Post by Tim..

Post by Chris
10 Amp

Are you sure?!
An amp with a 10a fuse is only going to give about 30w RMS max, and will be
of little use trying to power a sub.

Actually, all this talk of amp power ratings is a bit irrelevant. The
fuse at the source end is there to protect the wiring, so it's fine to
fit as big-a-fuse as you like as long as it's guaranteed to blow
before the wiring goes up in smoke. For example, if you're using 6mm^2
cable (which is good for 50A), the 30A fuse would be the best one to
go for. It has the lowest resistance of the three, so the least effect
on sound quality, but it'll still blow well before the cable catches
light. One thing you have to watch out for though, is that there
aren't any bits of thinner cable anywhere in the current path,
otherwise you'd need to down-rate the fuse to suit that cable.
The fuse in the amp, will obviously need to be whatever the
manufacturer was expecting.
Cheers,
Colin.

4.6mm2 Power Cable (Autoleads PC4-20 wiring kit). 30 Amp (360Watt Max). -
info on Packaging.

[Colin Stamp]

On Sat, 20 Aug 2005 20:19:31 GMT, "Chris"

Post by Chris

Post by Colin Stamp
On Sat, 20 Aug 2005 18:10:23 +0000 (UTC), "Tim.."

Post by Tim..

Post by Chris
10 Amp

Are you sure?!
An amp with a 10a fuse is only going to give about 30w RMS max, and will be
of little use trying to power a sub.

Actually, all this talk of amp power ratings is a bit irrelevant. The
fuse at the source end is there to protect the wiring, so it's fine to
fit as big-a-fuse as you like as long as it's guaranteed to blow
before the wiring goes up in smoke. For example, if you're using 6mm^2
cable (which is good for 50A), the 30A fuse would be the best one to
go for. It has the lowest resistance of the three, so the least effect
on sound quality, but it'll still blow well before the cable catches
light. One thing you have to watch out for though, is that there
aren't any bits of thinner cable anywhere in the current path,
otherwise you'd need to down-rate the fuse to suit that cable.
The fuse in the amp, will obviously need to be whatever the
manufacturer was expecting.
Cheers,
Colin.

4.6mm2 Power Cable (Autoleads PC4-20 wiring kit). 30 Amp (360Watt Max). -
info on Packaging.

Yep. You'd be a bit nearer the mark on 4.6mm^2, but still OK with a
30A fuse. Do make sure it's all at least that size all the way from
the battery to the amp though.

Cheers,

Colin.

[Chris]

Post by Colin Stamp

Post by Chris
4.6mm2 Power Cable (Autoleads PC4-20 wiring kit). 30 Amp (360Watt Max). -
info on Packaging.

Yep. You'd be a bit nearer the mark on 4.6mm^2, but still OK with a
30A fuse. Do make sure it's all at least that size all the way from
the battery to the amp though.
Cheers,
Colin.

Only using wires supplied in the Autoleads kit to Power and Earth it.

Cheers for info.

Chris