Sub with no pre-outs?

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wrencher_25

Copper - Posts: 101

Joined: March 23, 2003

Location: Canada

Posted: March 29, 2003 at 10:56 PM / IP Logged

My girlfriend has a JVC deck with no pre-outs on the back...my question is can you hook up a sub off the the right and left speaker wires...

that being L - and R+

My worry is that the sub will draw too much off of it without it being amplified and blow the fuse in the deck.

The other question would be could you MAKE RCA cables off of the leads on the speakers...it IS an AC signal.........just find a ground wire and make the RCA. IS THIS POSSIBLE. I am still new to the industry and am looking for creative ways to work around problems.

Andrew Weitzel

MECP First Class Installer

Qveon

Member - Posts: 40

Joined: January 10, 2003

Location: United States

Posted: March 29, 2003 at 11:04 PM / IP Logged

ok what you have to do is take the L&R out of the deck and plug it into the HI-Inputs of your amplifier and then you can run your sub off the amp's outputs.

Qveon

Member - Posts: 40

Joined: January 10, 2003

Location: United States

Posted: March 29, 2003 at 11:05 PM / IP Logged

oh and i forgot, no you can't make a RCA cable because the input voltage would be too high for the amp.

speedwayaudio1

Silver - Posts: 879

Joined: March 18, 2003

Location: United States

Posted: March 29, 2003 at 11:12 PM / IP Logged

they have rca conversion kits that turn high level to low level rca

Big Dave

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bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: March 29, 2003 at 11:13 PM / IP Logged

Get a high to low converter (LOC) with that you can tap into your rear speakers and it will convert the signal to a RCA. From the converter you can than run RCA cables to your sub amp.

esmith69

Gold - Posts: 1,511

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Joined: November 26, 2002

Location: United States

Posted: March 30, 2003 at 2:00 PM / IP Logged

You'd never want to bridge the speaker outputs of a head unit, especially if you're sending it to a line output converter. That being said, the best solution would be to tap in to the back speakers' wires as bberman said, and this will give you a relatively clean signal to send to the amp via an RCA cable

wrencher_25

Copper - Posts: 101

Joined: March 23, 2003

Location: Canada

Posted: March 30, 2003 at 2:16 PM / IP Logged

Awesome...thanks a lot for the tips. I'll see what kind of kits I can find in town.

Andrew Weitzel

MECP First Class Installer

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: March 30, 2003 at 2:25 PM / IP Logged

Glad to help just ask any car audio shop for a good quality high to low converter.

drvnbysound

Silver - Posts: 289

Joined: May 06, 2002

Location: United States

Posted: April 01, 2003 at 2:47 AM / IP Logged

Im curious to know how "Andrew" has "MECP Certified Installer" as part of his signature, and still asking questions as this one? I would think, as a certified imstaller, one would know about a Line Output Converter.

dragonrage

Copper - Posts: 193

Joined: March 15, 2003

Location: United States

Posted: April 01, 2003 at 8:27 AM / IP Logged

High to low converter in a nutshell. This'll give you about 1V if if your deck is around 40W/chan.

(from deck +) ____/\/\/\(10KOhm)/\/\/\_________(to amp +)

(from deck -) ____/\/\/\(1KOhm/\/\/\____|

|_________________________(to amp -)

2009 Pontiac G8 in planning stage

HU: ?

Speakers: ?

Amps: ?

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