How to remove carstereo HU-650 and replace with a dbl-din?
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Mike Langlois
- Posts: 143
- Joined: 22 April 2014
- Year and Model: 2002 V70 & V70 XC
- Location: Santa Ana, CA, USA
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Re: How to remove carstereo HU-650 and replace with a dbl-din?
I recently installed a double DIN JVC stereo and wish I had the information provided by forum members; especially Mikestone's. I completely rewired the speakers and even added the center speaker in the dash. I did the complete rewire because I was installing new speakers and they used external crossovers. With a complete rewire, I had no issues with the speakers functioning properly. As noted in the above information, the stock speakers have different impedance's. The impedance issue is one reason I replaced the speakers. I have one front door left on a V70 I am stripping and will be happy to post pictures of the wiring if it will help; just let me know.
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EngineeringBloke
- Posts: 318
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- Year and Model: 2006 2.5T S60
- Location: Boston
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Hi Stockholm,
At the back of the head-unit is a plug with 4 pairs of wires to the left and right, front and rear speakers. It is plugged into the head unit or into the optional amplifier's output lead.
One of the pairs goes to the drivers door and to the 6 - 6.6 inch speaker. Near that speaker, those leads are split and a pair goes to the tweeter unit. There is a capacitor in line with the tweeter.
The bigger mid range unit gets all the frequencies but due to its size and mass, it does not and cannot reproduce very high frequencies. But you may be surprised how high it goes.
The tweeter can play high frequencies but would be destroyed by high energy lower frequencies as it only has a small voice coil which would overheat. The inline capacitor has an impedance (AC resistance) that increases with lower frequency and so blocks and protects the tweeter so that it just reproduces higher tones.
The passenger side is similar.
If you did not alter the speakers or wiring in the door, then it is unlikely that the tweeters would have failed. I suspect that you are not getting high frequencies to the doors and were not aware how much sound comes from the low/mid units.
An aftermarket head-unit may be designed with a builtin crossover. This can send low and mid frequencies out of one set of outputs, and high frequencies out of a different set of outputs. If you have one of these connected to the front speakers, then only low/mid frequencies might be sent to the door and so you would not hear anything from the tweeters. This could be a wiring issue but also may be configured in the head-unit set up.
For example, my Pioneer can be set with low, mid and high outputs, plus separate outputs for 2 subs. I don't use the low outputs and set the filter on the mids to go down to 80 Hz. I ran 2 speaker lead pairs from my 5-way amplifier in the trunk to the standard connector, and another two pairs to my tweeter which are on the dashboard. I disconnected the tweeters in the doors and replaces the Volvo 6.5 inch ones with Boston acoustic ones. I only mention this as it is an example where the doors are only getting low and mid frequencies.
Please let us know:
1. The model and make of your aftermarket unit.
2. Did you connect an amplifier, if so which one?
3. Did you connect your new head-unit to the standard Volvo speaker plug? And what information did you have about the speaker wires?
4. Did you connect rear speakers as well as front ones? If so, do they have a normal frequency output (bass and treble)?
At the back of the head-unit is a plug with 4 pairs of wires to the left and right, front and rear speakers. It is plugged into the head unit or into the optional amplifier's output lead.
One of the pairs goes to the drivers door and to the 6 - 6.6 inch speaker. Near that speaker, those leads are split and a pair goes to the tweeter unit. There is a capacitor in line with the tweeter.
The bigger mid range unit gets all the frequencies but due to its size and mass, it does not and cannot reproduce very high frequencies. But you may be surprised how high it goes.
The tweeter can play high frequencies but would be destroyed by high energy lower frequencies as it only has a small voice coil which would overheat. The inline capacitor has an impedance (AC resistance) that increases with lower frequency and so blocks and protects the tweeter so that it just reproduces higher tones.
The passenger side is similar.
If you did not alter the speakers or wiring in the door, then it is unlikely that the tweeters would have failed. I suspect that you are not getting high frequencies to the doors and were not aware how much sound comes from the low/mid units.
An aftermarket head-unit may be designed with a builtin crossover. This can send low and mid frequencies out of one set of outputs, and high frequencies out of a different set of outputs. If you have one of these connected to the front speakers, then only low/mid frequencies might be sent to the door and so you would not hear anything from the tweeters. This could be a wiring issue but also may be configured in the head-unit set up.
For example, my Pioneer can be set with low, mid and high outputs, plus separate outputs for 2 subs. I don't use the low outputs and set the filter on the mids to go down to 80 Hz. I ran 2 speaker lead pairs from my 5-way amplifier in the trunk to the standard connector, and another two pairs to my tweeter which are on the dashboard. I disconnected the tweeters in the doors and replaces the Volvo 6.5 inch ones with Boston acoustic ones. I only mention this as it is an example where the doors are only getting low and mid frequencies.
Please let us know:
1. The model and make of your aftermarket unit.
2. Did you connect an amplifier, if so which one?
3. Did you connect your new head-unit to the standard Volvo speaker plug? And what information did you have about the speaker wires?
4. Did you connect rear speakers as well as front ones? If so, do they have a normal frequency output (bass and treble)?
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