Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q!

abhipuru16 · 12th November 2010, 11:44

Quote:

Originally Posted by navin

50Hz and 1kHz are fine as long the sub is XOed atleast an octave above 50Hz.

At what reference level?

And yet another query-
What is known as setting the gains high on an amplifier, is it when the knob is more towards 8V or is it when it is more towards 0.3V?

navin · 12th November 2010, 11:53

Quote:

Originally Posted by abhipuru16

What is known as setting the gains high on an amplifier, is it when the knob is more towards 8V or is it when it is more towards 0.3V?

Ideally the gains should be set at about 50%-70% so if you want to keep it simple start in the middle and turn it up if you find the volume too low.

abhipuru16 · 12th November 2010, 14:01

Quote:

Originally Posted by abhipuru16

At what reference level?

And yet another query-
What is known as setting the gains high on an amplifier, is it when the knob is more towards 8V or is it when it is more towards 0.3V?

If I ask specifically?

LionX · 12th November 2010, 14:36

Quote:

Originally Posted by abhipuru16

If I ask specifically?

As per my understanding it is when the knob is more towards 0.3V because you are increasing sensitivity of the amp.

Sam Kapasi · 12th November 2010, 15:01

Quote:

Originally Posted by abhipuru16

If I ask specifically?

Quote:

Originally Posted by LionX

As per my understanding it is when the knob is more towards 0.3V because you are increasing sensitivity of the amp.

Absolutely correct. The lower the voltage on the gain setting, the higher the gain of the amplifier is.

abhipuru16 · 12th November 2010, 15:12

Okay, if in an amplifier, the gains are set high, would there be clipping at say 30% volume or normal listening volumes?

Also, how to activate the Subsonic Filter?
Does it activate automatically when LPF is switched on?
I am asking because my amplifier has it for both channels and the switch for crossover is only for- HPF-LPF-OFF

mukeshgoel · 12th November 2010, 15:19

I have recently installed JVC AVX-836 HU (Without B&W, as this model is not available officially yet) in my Civic.

The only problem I am facing is the microphone of this HU is really bad. I have used HU with bluetooth (Blaupunkt MP57) in my Swift last year and it was really good but I am not able to use it the JVC. I have to literally shout, even then my voice is not audible to the caller.

This particular piece of microphone maybe defective or it might not be successful in this model of JVC.

Any suggestion guys?

Can I use other microphones with this unit? If yes, from where and for how much I can get it in Delhi ?

Thanks in advance.

DerAlte · 12th November 2010, 15:57

@mukeshgoel, where have you mounted the microphone? Dumb question, but - are you sure the microphone is connected?

The best place for the microphone is near the visor. Where exactly depends on how the microphone and it clamp are oriented. You need to experiment with location and direction of the mic. A good place to start is where the A-pillar meets the roof near the sun visor.

mukeshgoel · 12th November 2010, 16:02

Hi.

It is connected. If I shout then I am slightly audible to the caller and my voice is distorted like a cheap radio.

It is placed exactly where you are suggesting (where the A-pillar meets the roof near the sun visor).

By the way, I am using my Blackberry Bold 9700. It streams music from my phone to the HU so well. I am yet to try another phone.

DerAlte · 12th November 2010, 17:30

You could try using another mic, as long as the jack is the same. I doubt if there is a problem with the mic, it could be just a loose connection. Try a JVC service center - even if it is not officially supported, they would be able to help you diagnose the problem.

mukeshgoel · 12th November 2010, 17:34

Thanks.

Will try another phone first.

If unsuccessful, will try another mic.

Can someone please confirm are they normal mic or JVC has some special proprietary jack/pin ?

navin · 13th November 2010, 10:05

I use a Blackberry Torch (before that a Bold2) with a bluetooth Jabra and have had no problems.

vamsi.kona · 15th November 2010, 01:49

Dear All,

I would like to know your opinion or choice of HU from the two units mentioned below. I cannot personally audition them as I getting them from US. Also I have narrowed my choice to these two after getting convinced that Clarion is a good brand.

There is not much of a price difference between the two. I don't know much about the technical terms hence this request. And I have attached the file showing comparisions of HU's where the below mentioned Hu's are featured. (From Clarion India site)

Clarion UK | CZ500E

Clarion UK | FZ709E

DerAlte · 15th November 2010, 10:07

The FZ709 is disc-less, so if you want to play CDs, even MP3 CDs, you can't. Funnily, it also doesn't have a removable face plate, nor a rotary volume control. On the other hand, the FZ709 has a 24-bit DAC, which means better sound.

With Time Alignment, The DXZ786USB is a better choice, but alas it doesn't have Bluetooth. Tough choice!

fine69 · 18th November 2010, 12:23

What are the basic features that one should look for in an HU (~6-7k) if 1 sub and 1 amp would also be added in future? The initial setup would have 1 HU and 1 set of components for the front door. Later, say after 2-3 months, I would add an amp and sub also.

I've already shortlisted JBL's GTO608c but do not have much idea about what HU to go with. I really liked Pioneer's DEH-4190SD and Kenwood's KDC-X7013U for their looks but the price is on the higher side. So need a little help in selecting a good looking HU which would only be required to drive front components.

The car is driven with 2 occupants at max so no plans of having any co-ax in rear but would definitely want to add an amp and sub in future and hence would want the HU to be able to undertake such modifications.

When browsing the net for the HUs I get to see a lot of features but have no idea what all are really worth having in an HU.

12th November 2010, 15:12	#10536
abhipuru16 BHPian Join Date: Dec 2009 Location: Faridabad Posts: 719 Thanked: 40 Times	Okay, if in an amplifier, the gains are set high, would there be clipping at say 30% volume or normal listening volumes? Also, how to activate the Subsonic Filter? Does it activate automatically when LPF is switched on? I am asking because my amplifier has it for both channels and the switch for crossover is only for- HPF-LPF-OFF Last edited by abhipuru16 : 12th November 2010 at 15:15.
	() Thanks

12th November 2010, 15:19	#10537
mukeshgoel Senior - BHPian Join Date: Sep 2008 Location: Gurgaon Posts: 1,278 Thanked: 2,412 Times View My Garage	I have recently installed JVC AVX-836 HU (Without B&W, as this model is not available officially yet) in my Civic. The only problem I am facing is the microphone of this HU is really bad. I have used HU with bluetooth (Blaupunkt MP57) in my Swift last year and it was really good but I am not able to use it the JVC. I have to literally shout, even then my voice is not audible to the caller. This particular piece of microphone maybe defective or it might not be successful in this model of JVC. Any suggestion guys? Can I use other microphones with this unit? If yes, from where and for how much I can get it in Delhi ? Thanks in advance.
	() Thanks

12th November 2010, 15:57	#10538
DerAlte Senior - BHPian Join Date: Mar 2007 Location: Bangalore Posts: 8,035 Thanked: 2,920 Times	@mukeshgoel, where have you mounted the microphone? Dumb question, but - are you sure the microphone is connected? The best place for the microphone is near the visor. Where exactly depends on how the microphone and it clamp are oriented. You need to experiment with location and direction of the mic. A good place to start is where the A-pillar meets the roof near the sun visor.
	() Thanks

12th November 2010, 16:02	#10539
mukeshgoel Senior - BHPian Join Date: Sep 2008 Location: Gurgaon Posts: 1,278 Thanked: 2,412 Times View My Garage	Hi. It is connected. If I shout then I am slightly audible to the caller and my voice is distorted like a cheap radio. It is placed exactly where you are suggesting (where the A-pillar meets the roof near the sun visor). By the way, I am using my Blackberry Bold 9700. It streams music from my phone to the HU so well. I am yet to try another phone.
	() Thanks

12th November 2010, 17:30	#10540
DerAlte Senior - BHPian Join Date: Mar 2007 Location: Bangalore Posts: 8,035 Thanked: 2,920 Times	You could try using another mic, as long as the jack is the same. I doubt if there is a problem with the mic, it could be just a loose connection. Try a JVC service center - even if it is not officially supported, they would be able to help you diagnose the problem.
	() Thanks

12th November 2010, 17:34	#10541
mukeshgoel Senior - BHPian Join Date: Sep 2008 Location: Gurgaon Posts: 1,278 Thanked: 2,412 Times View My Garage	Thanks. Will try another phone first. If unsuccessful, will try another mic. Can someone please confirm are they normal mic or JVC has some special proprietary jack/pin ?
	() Thanks

13th November 2010, 10:05	#10542
navin Team-BHP Support Join Date: Mar 2004 Location: Mumbai Posts: 25,409 Thanked: 9,957 Times	I use a Blackberry Torch (before that a Bold2) with a bluetooth Jabra and have had no problems.
	() Thanks

15th November 2010, 10:07	#10544
DerAlte Senior - BHPian Join Date: Mar 2007 Location: Bangalore Posts: 8,035 Thanked: 2,920 Times	The FZ709 is disc-less, so if you want to play CDs, even MP3 CDs, you can't. Funnily, it also doesn't have a removable face plate, nor a rotary volume control. On the other hand, the FZ709 has a 24-bit DAC, which means better sound. With Time Alignment, The DXZ786USB is a better choice, but alas it doesn't have Bluetooth. Tough choice!
	() Thanks

18th November 2010, 12:23	#10545
fine69 Senior - BHPian Join Date: Dec 2008 Location: New Delhi Posts: 1,598 Thanked: 1,468 Times	What are the basic features that one should look for in an HU (~6-7k) if 1 sub and 1 amp would also be added in future? The initial setup would have 1 HU and 1 set of components for the front door. Later, say after 2-3 months, I would add an amp and sub also. I've already shortlisted JBL's GTO608c but do not have much idea about what HU to go with. I really liked Pioneer's DEH-4190SD and Kenwood's KDC-X7013U for their looks but the price is on the higher side. So need a little help in selecting a good looking HU which would only be required to drive front components. The car is driven with 2 occupants at max so no plans of having any co-ax in rear but would definitely want to add an amp and sub in future and hence would want the HU to be able to undertake such modifications. When browsing the net for the HUs I get to see a lot of features but have no idea what all are really worth having in an HU.
	() Thanks