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Old 08-11-2010, 10:28 AM   #1
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Bass tube and amp setup?

Looking at getting a 6 1/2" bass tube for the jeep... Bazooka BT6024DVC BT Series 6-1/2" Bass Tube® with dual 4-ohm voice coils at Crutchfield.com
this tube has dual 4 ohm voice coils.....Whats that mean?

Also is this the right amp to get with it... JVC KS-AX4302 2-channel car amplifier — 100 watts RMS x 2 at Crutchfield.com

I'm looking for a little more bass, i thought this 6.5" would work well it has a 300 watt ratting.

All i want to know is if this would be a good combo..

Also thinking about tieing my rear Kenwood sound pods into the amp as well.

any suggestions?

Thanks

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Old 08-11-2010, 11:13 AM   #2
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Dual voice coil: All that means is it has two coils. One for left channel and one for the right channel.

define:dual voice coil - Google Search

Many people use those and like them. I guess it depends on what you want as far as bass and space is concerned. I installed a CompVT in my center console and push it with a small amp, that gives me all the thump I require.

As far as hooking up the extra speakers, that shouldn't be a problem but I always download the manuals first and read what it says before ordering to make sure there won't be any problems. basically, your gonna hook the Bazooka tube up to the left and right channel outs of the amp. you'll probably be doing the with the Kenwood speakers also. that's gonna cut you impedance in half so the amp will push more power. that doesn't make it much louder, just working harder. You might want to look at a four channel amp, but i might not be needed. Again, check the manual of the amp and see what it states.

Only problem I can see is that whatever you set your freq. response to on the amp for the Bazooka tube, it'll also do the same for the pods. so, if you set the tube up for low pass for more bass, then it'll also do the same for the pods and that will probably sound like crap.

JMO though.

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Old 08-11-2010, 11:17 AM   #3
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DVC has nothing to do with left and right. Basically they are made to achieve a certain impedance for your amplifier. Best thing you can do is save your self some bs and buy the powered Bazooka tube...less wiring, lesss mounting, etc. I am a Bazooka dealer and that's what I would do
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Old 08-11-2010, 11:29 AM   #4
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I'm not expert but that amp seems to be rated pretty low for that tube (amp: 100w RMS x2 @ 2ohms, tube: 300w RMS, 150w per coil). Also, consider that if the Kenwoods in the rear can only handle 60w RMS or something, that amp will be too powerful for them.

I agree with PTaylor about potentially finding a 4-channel 4/3/2 amp that you could put the Kenwood's on 1&2 and bridge the sub on 3&4.
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Old 08-11-2010, 11:37 AM   #5
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with a 4 ohm DVC you can wire it two ways, the first is wiring it in parallel that will cut the ohms in half, so it would make it have a 2 ohm resistance when wired into the amp, the second is to wire it in series and this will double the ohms, so it would be 8 ohms. the reason for this is so that you have more options on wiring your sub to your amp. the lower the ohms the more power it can handle.

as for an amp, look for a mono(single channel) amp with a rating of 2 ohms and have a power rating of 300 rms watts.

just so you know, those bass tubes suck, plain and simple. its over priced for what it pumps out.

so i can better help you what is your spending limit?
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Old 08-11-2010, 11:49 AM   #6
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Bass tubes do not suck...they did 15 years ago, but the ones today aren't too bad actually. Like I said above that no one seems to read....buy one with the amp built in it. And putting your rear speakers on it too is a dumb idea.
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Old 08-11-2010, 12:53 PM   #7
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Quote:
Originally Posted by Ibuildembig View Post
DVC has nothing to do with left and right.
not necessarily true....
Dual Voice Coil Subwoofers

Dual voice coil subwoofers are becoming a popular choice among car audio enthusiasts who want more flexibility in wiring their sound systems. While typical subwoofers have a single voice coil, dual voice coil (DVC) subwoofers use two separate voice coils, each with its own connections, mounted on one cylinder, connected to a common cone.
The key difference between single and dual voice coil subwoofers is the multiple wiring options DVC subs offer:

* Parallel: A dual 4-ohm voice coil subwoofer with its coils wired in parallel presents a 2-ohm load to your amplifier. Since an amplifier produces more wattage at a lower impedance, the parallel connection ensures you'll get the most output from your amp. In the same fashion, if you have a stereo amplifier and two DVC subs, wire both subs for 2-ohm impedance (one per channel) for maximum output.
* Series: Series wiring lets you configure multiple woofers to one amplifier at an acceptable impedance. Wire both coils in series for an 8-ohm impedance, and then wire two 8-ohm subs together in parallel for 4-ohm total impedance (perfect for most 2-channel amps bridged to mono operation). Another example: if you have a high-powered 2-channel amplifier, wire four 8-ohm subs per channel (each channel sees a 2-ohm load).
* Independent: You can wire each voice coil to a separate channel of your amplifier, if you prefer not to bridge your amp. Independent wiring is a nice option if you're wiring two DVC subs to a 4-channel amplifier — one voice coil per channel.
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Old 08-11-2010, 01:00 PM   #8
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Oh I understand the theory, I am an IEE and have been in the 12V industry for 25 years. That being said, a channel is not designated as left or right...it could be left and right, or right but not left, etc etc. Just because you have a left and right input to the amplifier doesn't mean its always that way. I'd say 90 percent of the HU's made these days have a single RCA output for low range...therefore its a combination of left and right. If a mono amp is used, its the same thing...no seperate left and right. And in theory, if a left signal emitting its own wave was fed into one coil, and a right signal emmitting a completely different wave was fet into the other coil...it would sieze. The coils cannot move independantly from each other.
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Old 08-11-2010, 01:02 PM   #9
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You cant have a sub and speakers wired to the same channel and make them sound good... you need to have the high/ low pass filters set depending on what your powering to block out the higher frequencies (for a sub) or the lower frequencies so your speakers dont distort, so if theyre both running off the same amp you will be losing sound quality with both. I recommend a 4 channel amp for your speakers and a two channel or mono amp for you subs... itll cost more but they will sound a million times better.
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Old 08-11-2010, 01:45 PM   #10
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Quote:
Originally Posted by Jma20a View Post
with a 4 ohm DVC you can wire it two ways
Post 7.
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Old 08-11-2010, 02:58 PM   #11
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i don't understand what your tying to say. are you trying to say there is only one way to wire a DVC sub?
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Old 08-11-2010, 05:59 PM   #12
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To answer the original question. As everyone has already stated it is so you can wire your speaker so the amp can see a 2ohm or a 4ohm load. Ohm's are a measure of resistance so a 2ohm load has less resistance i.e. the power can flow more freely than a 4 ohm load, so if the power can flow more freely then the amp will produce more power. Example I have an amp in my car that is stable to 1ohm mono, this amp is rated at 50watts a channel (in stereo @ 4ohms), but if wired to a speaker with duel 2ohm voice wired parallel bridged(one speaker running off two channels)the amp will see a 1ohm load and at that point it is porducing 800watts rms.
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Old 08-12-2010, 09:24 AM   #13
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i don't understand what your tying to say. are you trying to say there is only one way to wire a DVC sub?
Not at all, I was showing that there are more than two ways to wire up dual voice coil speakers. Wiring it up so it works with two channels, a left and right, will give stereo sound.
I believe, and I could be wrong, that the center console of the TJ series is done this way since it is a dual voice coil. a few people have used the bazooka tube speakers to replace the blown center console speaker in their Jeeps. I wasn't sure what mudslinger150 was shooting for, that's why I threw it out there.

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