Gain settings simplified!

Maky · 9th December 2014, 20:09

Quote:

Originally Posted by DerAlte

Try re-positioning the sub, i.e. facing rear, then side, then front. In some positions it will sound better than in the others. Another way is to use Time Alignment, if available in the HU.

Done, Done and Done. Top firing is poo and not much difference between front and rear. Currently I've set it as Front.

You think a HU upgrade will result in significant difference? something like a P80 PRS?

DerAlte · 10th December 2014, 12:35

Quote:

Originally Posted by Maky

... You think a HU upgrade will result in significant difference? something like a P80 PRS?

IMHO other than Time Alignment, which is there in quite a few HUs, P80RS will not be justified at it's price only to improve bass. P80RS is good overall, so one has to look at it differently.

Maky · 10th December 2014, 14:31

Quote:

Originally Posted by DerAlte

IMHO other than Time Alignment, which is there in quite a few HUs, P80RS will not be justified at it's price only to improve bass.

Yes I figured as much. I went ahead and moved the gain knob to 1/2 over the earlier 1/4th. The bass response compared to the treble is much more in balance now. I did this after speaking to some people who figured the box rise could be a bit much for my enclosure at 1.277 Cu.Ft and the final the impedance could be as much as 3Ohms.

I still have to turn the volume up a little more than I'd like but its significantly better than where it was earlier at 1/4th. I will have a check on the 4Ch gains as I think it might be higher than what it should be at. Also, I ran my palm over the Subwoofer cone surface after half an hour of listening to heavy hitting music and the Subwoofer wasn't warm at all.
Perhaps I've finally found a good point for my Ultimo SC to be fed at : ).....

Quote:

Originally Posted by DerAlte

P80RS is good overall, so one has to look at it differently.

Correct you are...
I have upgrades planned, I've ended up spending more than I originally set out to so these upgrades will take place after a couple of months. I will also use the time to research more products. I wish to eventually upgrade speakers, sound deaden all doors and upgrade HU as well.

Following is what I have and what I have narrowed down so far:

Current - Upgrade
Sony XAV-64BT - P80 PRS
TS-A1605C/TS-A6965R - Morel Tempo
No Sound Deadening - Sound Deaden

If my current amplifier fails to bring those speakers to life I will consider upgrading the mainstream series Pioneer amplifier to two exotic ones instead. I think the 80PRS would make much more sense later on with those upgrades in place and not right now, DerAlte.

viXit · 19th July 2020, 15:12

So it doesn't matter what the ratings of the speakers are when setting gains?
Does 50.4 mean 50w rms at 4ohms or is it talking about the 4 channels?

a4anurag · 30th October 2020, 21:56

Quote:

Originally Posted by viXit

So it doesn't matter what the ratings of the speakers are when setting gains?
Does 50.4 mean 50w rms at 4ohms or is it talking about the 4 channels?

You'll need to know the RMS rating of the speaker and impedance rating too when setting gains on the amplifier.

Where did you see the "50.4"? Was it on the speaker or amplifier?

viXit · 30th October 2020, 22:07

Quote:

Originally Posted by a4anurag

You'll need to know the RMS rating of the speaker and impedance rating too when setting gains on the amplifier.

Where did you see the "50.4"? Was it on the speaker or amplifier?

I'll check the back of the speakers for the impendance rating. I saw the 50.4 on the amplifier. I've seen similar notations on the forum several times. 75.4 , 50.4 etc.

a4anurag · 30th October 2020, 22:47

Quote:

Originally Posted by viXit

I'll check the back of the speakers for the impendance rating. I saw the 50.4 on the amplifier. I've seen similar notations on the forum several times. 75.4 , 50.4 etc.

Mostly speakers are rated at 4 ohms and subwoofers are either 2 or 4 ohms.

If it is on the amplifier, it is wattage x no. of channels @ 4 ohms generally. For example: Gladen One 70.6 is: 70W x 6 channels @ 4 ohms

viXit · 31st October 2020, 00:05

Quote:

Originally Posted by a4anurag

Mostly speakers are rated at 4 ohms and subwoofers are either 2 or 4 ohms.

If it is on the amplifier, it is wattage x no. of channels @ 4 ohms generally. For example: Gladen One 70.6 is: 70W x 6 channels @ 4 ohms

Thanks for the info.
My car really IS a mess. Check this video out. CRAZY whining from the sound system, it's gone now after interchanging the channels of the amplifier and a battery replacement of the car. But it's funny how bad it was.

https://youtu.be/8AmuhJ-11VQ

straight6 · 12th January 2021, 02:27

Can someone tell me what voltage should I set for my mono amp which can do 1000 rms @ 1 ohm and 700 rms @ 2 ohms?

I will be using it at 2 ohms.

a4anurag · 12th January 2021, 09:42

Quote:

Originally Posted by straight6

Can someone tell me what voltage should I set for my mono amp which can do 1000 rms @ 1 ohm and 700 rms @ 2 ohms?

I will be using it at 2 ohms.

What is the RMS ratings for the subwoofer that this monoblock will be driving?

straight6 · 12th January 2021, 15:06

Quote:

Originally Posted by a4anurag

What is the RMS ratings for the subwoofer that this monoblock will be driving?

Its rated at 600 rms. The Pioneer champion series pro.

a4anurag · 15th January 2021, 15:30

Quote:

Originally Posted by straight6

Its rated at 600 rms. The Pioneer champion series pro.

RMS = 600W
Impedance = 2ohms

Voltage to be set on multimeter = 34.64V (sq root of 600*2)

straight6 · 24th January 2021, 16:40

Quote:

Originally Posted by a4anurag

RMS = 600W
Impedance = 2ohms

Voltage to be set on multimeter = 34.64V (sq root of 600*2)

So I got the gain set to 34.9 as it was very difficult to set it exactly. Also I was playing the test tone on BT. Do you think I should set it with with the test tone on the usb later?

a4anurag · 24th January 2021, 17:06

Quote:

Originally Posted by straight6

So I got the gain set to 34.9 as it was very difficult to set it exactly. Also I was playing the test tone on BT. Do you think I should set it with with the test tone on the usb later?

CD or USB is better choice for source files for setting the gains. Go to SMD website and download the test tracks especially 40Hz @ 0dB and 1,000Hz @ 0dB.

You can set the gains to 34.6V or 34.7V.

straight6 · 26th January 2021, 04:38

Quote:

Originally Posted by a4anurag

RMS = 600W
Impedance = 2ohms

Voltage to be set on multimeter = 34.64V (sq root of 600*2)

The 1st post of this thread says you must consider the rms of the amplifier which would be 700 @ 2 ohms so then shouldn't I have set it at 37.41 V?

19th July 2020, 15:12	#64
viXit BHPian Join Date: Apr 2020 Location: Hyd Posts: 804 Thanked: 2,876 Times View My Garage	Re: Gain settings simplified! So it doesn't matter what the ratings of the speakers are when setting gains? Does 50.4 mean 50w rms at 4ohms or is it talking about the 4 channels?
	() Thanks

12th January 2021, 02:27	#69
straight6 Senior - BHPian Join Date: Oct 2007 Location: Bombay Posts: 2,548 Thanked: 296 Times	Re: Gain settings simplified! Can someone tell me what voltage should I set for my mono amp which can do 1000 rms @ 1 ohm and 700 rms @ 2 ohms? I will be using it at 2 ohms.
	() Thanks