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How to adjust amplifier for speakers?

post #1 of 3
Thread Starter 
I bought from Sony a media reciever, amplifier, 2 rear speakers and 2 front speakers for my car.
My media reciever model number is: Sony: DSX-S310BTX
With a built in amplifier Max power output : 52 watts x 4 at 4 ohms
Power Ad Hoc : CEA2006 Standard Power: 17 Watts RMS per channel into 4 Ohms, 4 channels driven from 20 Hz to 20 kHz with less than 1% THD+N.
Speaker Impedance : 4-8 Ohms High Pass Filter : Selectable on/off at: 50, 60, 80, 100 or 120 Hz.
High Voltage Pre Out : 4 Volt pre-out
Loudness : Dynamic Loudness
Low Pass Filter : Selectable on/off at: 50, 60, 80, 100 or 120 Hz.
Output Power (4ohm, 1kHz,16V)(W) : 52 watts x 4

Amplifier model number: Sony XM-ZR704
700W max power, 70W x 4 RMS into 4 ohms, 80W x 4 RMS into 2 ohms, 160W x 2 RMS into 4 ohms, variable 50-300Hz HPF/LPF on front and rear channels, Band : Low Pass Filter: 50-300 HZ, -12dB/oct High Pass Filter: 50-300 HZ, -12dB/oct
Circuit System : OTL Output Transformerless Circuit Pulse Power Supply
Frequency Response : 10-100kHz (+0/-3 dB)
Harmonic Distortion : 0.05% (1kHz)
Impedance : 2-8 Ohms Stereo, 4-8 Ohms Mono
Input Level : 0.3 - 6.0V (RCA input) 1.2 - 12.0V (High Level Input)
Low Boost : 0-10dB (40Hz)
Noise Level : 93 dBA
Power Supply : OTL Output Transformerless Circuit Pulse Power Supply
Signal Circuitry : 6-70Hz Variable -12 dB/Octave Subsonic filter


Rear speakers model number: Sony XS-GTX6932
Frequency Response : 30 - 30,000 Hz
Impedance : 4 Ohms
Sensitivity (db) : 88 +/- 2 dB/1W/1m
Power Handling Capacity : 500 Watts
Rated Input : 85 Watts


Front speakers model number:Sony XS-GTX1642
Frequency Response : 50-23,000 Hz
Impedance : 4 Ohms
Sensitivity (db) : 88 +/- 2 dB/1W/1m ----Power Handling Capacity : 350 Watts
Rated Input : 60 Watts

I connected everything by an installer. He did a great job mounting everything and installing it all but I don't think he knows how to do amp adjustments.

I managed get myself into the trunk and look. These are the 4 little turning knobs I see in the back of my amp. I have 2 sets of them, Front speakers and Rear speakers.

1: Low Boost (40hz)
Has settings between 0-+10db.

2: Filter- settings between 50-300hz.

3: Level- settings between 0.3v-6.

4: Subsonic filter- settings between 6-70hz.

I'm looking to make some adjustments because I feel my bass is to high and also the highs are too high. I tried lowering all equalizer settings but still can't get what I want.
post #2 of 3
Make sure all head unit settings are at zero. Anything that boosts the frequencies in any way is off. Like loud.

At the amp make sure the bass boost is at zero (Hate to use bass boost as it usually results in the amp clipping way early.

Now am I to understand that there is to much bass and the highs are to bright/fatiguing?

Basically that is going to be a function of the speakers you have.

If there is to much bass, play with the setting of the SSF for the rear speakers. Turn it up until you get the amount of bass you are happy with. The SSF will help attenuate the low bass from the speakers.

As for highs, you will have to play with EQ or maybe some cloth in front of the tweeter portions of the speakers to help absorb some of the highs. Or change speakers. Or buy a better EQ. Hard to advise on that one.
post #3 of 3
Thread Starter 
Thanks.
I have the Bass boost turned off. I looked at my amplifier and the guy who installed it actually set the Level/Gain all the way up. I looked at some videos on YouTube and was able to adjust it myself. Now I'm able to get the bass I want and overall the sound is good. I'm still going to have a professional tune it with a meter.
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