I'm a little short on cash but I have the inverter and sub. I've got it all hooked up but there's only one input for the sub but two RCA outputs on the deck. I spliced them into the one line in but all I get is a constant buzz... No fluctuation whatsoever. Any help is much appreciated.
Thank you much,
pint
Replies (5)
compvr15s on 11/28/2004 14:58:38
most home subs only require a singe input from the rca either the left or da right it dont matter. so maybe by you splicing them together ya messed up, try just pluggin one side of the rcas in... the prolly wont give you what your looking for, i maybe wrong but im thinkin just save a lil money and invest in a lil system, you willprolly be more satisfied going that way... but what size is the sub and how big is the enclosure? good luck wait for other to post before doing anything, not very familiar with puttin home audio in vehicles
swez on 11/28/2004 19:06:23
This could be a tough go for a few reasons:
1. That invertor may generate a lot of noise into the car audio system
2. The RCA output levels of the HU are much higher than a typical 120 volt Home tuner/amp can handle. Home stereos operate on signals under 1.0 volts (707mV typ.)
3. Does your HU have a sub output channel with a built in crossover?
The constant hummmm you hear, is most likely an open ground problem. I would look at the RCA's from HU to amp first. You can tell if there is a problem if the noise (hum) goes away when you disconnect the RCA's from the amplifer.
May I suggest a few things? Of coarse....
1, Replace the modified RCA cables with known good cables
2. Hook them up in stereo as ususal
3. If the amp has a switch that permits MONO signals, use that
4. Are the speakers you are using full range of just a sub?
Depending on your responses, we take it from there. This may not be easy... The sub/speaker should work fine in a car application. It's the amplification process that I am concerned about.
Swez
cplkittle on 11/28/2004 22:14:37
you should never splice or reduce using a y adapter any two rca or speaker outputs from the HU (radio). These are not mono outputs, and can backfeed into one another. The only way to achieve mono sound from a stereo source is through a mono amplifier. Inside the amplifier, the sources are diode isolated before they are combined.
As Swez mentioned, too much power could also be a problem. Even the cheapest HUs put out 2-3 volts per RCA channel.
pintpoint5 on 11/29/2004 08:35:23
k thanks guys. I appreciate all the help. I've considered the options and decided I want to keep my sub at my computer. I'm considering one of those Bazooka Tubes. Internal amp and I don't need a whole lot of power. Any concerns on this (I don't need lots of power)?
Thanks,
pint
Oh, but if anyone has the solution to this it'd be nice to know :D
swez on 11/29/2004 10:06:43
That's a good option. Bazooka has speaker level inputs on some models and I believe they also have RCA line inputs to a MONO amp as well.
All you would need to install is a power wire, ground and remote turn on signal line. Depending on the unit used, you may or may not need RCA's at all.
Swez
Thank you much,
pint
Replies (5)
compvr15s on 11/28/2004 14:58:38
most home subs only require a singe input from the rca either the left or da right it dont matter. so maybe by you splicing them together ya messed up, try just pluggin one side of the rcas in... the prolly wont give you what your looking for, i maybe wrong but im thinkin just save a lil money and invest in a lil system, you willprolly be more satisfied going that way... but what size is the sub and how big is the enclosure? good luck wait for other to post before doing anything, not very familiar with puttin home audio in vehicles
swez on 11/28/2004 19:06:23
This could be a tough go for a few reasons:
1. That invertor may generate a lot of noise into the car audio system
2. The RCA output levels of the HU are much higher than a typical 120 volt Home tuner/amp can handle. Home stereos operate on signals under 1.0 volts (707mV typ.)
3. Does your HU have a sub output channel with a built in crossover?
The constant hummmm you hear, is most likely an open ground problem. I would look at the RCA's from HU to amp first. You can tell if there is a problem if the noise (hum) goes away when you disconnect the RCA's from the amplifer.
May I suggest a few things? Of coarse....
1, Replace the modified RCA cables with known good cables
2. Hook them up in stereo as ususal
3. If the amp has a switch that permits MONO signals, use that
4. Are the speakers you are using full range of just a sub?
Depending on your responses, we take it from there. This may not be easy... The sub/speaker should work fine in a car application. It's the amplification process that I am concerned about.
Swez
cplkittle on 11/28/2004 22:14:37
you should never splice or reduce using a y adapter any two rca or speaker outputs from the HU (radio). These are not mono outputs, and can backfeed into one another. The only way to achieve mono sound from a stereo source is through a mono amplifier. Inside the amplifier, the sources are diode isolated before they are combined.
As Swez mentioned, too much power could also be a problem. Even the cheapest HUs put out 2-3 volts per RCA channel.
pintpoint5 on 11/29/2004 08:35:23
k thanks guys. I appreciate all the help. I've considered the options and decided I want to keep my sub at my computer. I'm considering one of those Bazooka Tubes. Internal amp and I don't need a whole lot of power. Any concerns on this (I don't need lots of power)?
Thanks,
pint
Oh, but if anyone has the solution to this it'd be nice to know :D
swez on 11/29/2004 10:06:43
That's a good option. Bazooka has speaker level inputs on some models and I believe they also have RCA line inputs to a MONO amp as well.
All you would need to install is a power wire, ground and remote turn on signal line. Depending on the unit used, you may or may not need RCA's at all.
Swez
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