Greetings audiofolk,
I have 2 woofers. The left sounds "weaker" than the right one. Lower volume, less vivid. No crossover. Exact same woofers, brand new.
I have checked everything from internal wiring (cabinet), external wiring (audio cables), the DAC, the AMP and all the cables in between. I switched the speaker from left to right, the right speaker sounds weaker. The "weaker" woofer needs 50% more volume to stay at the same level as the good one.
So... is it the woofer/driver itself that's messed up or am I missing something?
UPDATE
AMP:
Denon AVR-4306
WOOFER:
SB15NAC30-4 (4 ohm, I checked both with a multimeter).
No crossover, no schematic.
I have 2 woofers. The left sounds "weaker" than the right one. Lower volume, less vivid. No crossover. Exact same woofers, brand new.
I have checked everything from internal wiring (cabinet), external wiring (audio cables), the DAC, the AMP and all the cables in between. I switched the speaker from left to right, the right speaker sounds weaker. The "weaker" woofer needs 50% more volume to stay at the same level as the good one.
So... is it the woofer/driver itself that's messed up or am I missing something?
UPDATE
AMP:
Denon AVR-4306
WOOFER:
SB15NAC30-4 (4 ohm, I checked both with a multimeter).
No crossover, no schematic.
Last edited:
Disconnect the woofers and check the amplifier for an imbalance. Input an AC signal (50-100Hz) at a voltage at the input(s) of the amplifier of 500mV-1V and then check each channels output (in Stereo mode) R then L and compare the voltages. You should have fairly close matching AC voltages R to L. If one channel is say more than 100mV difference, you found your issue. If you can hear it easily, more likely it's off by 500mv-1 volt channel to channel.
You have already ruled out the amplifier as the source of the problem.'
To confirm your diagnosis of the speaker being the problem,
first place the speakers face to face about 3cm apart.
Reverse the leads on the back of ONE of the speakers.
Play music in MONO at the normal position of the volume control.
Adjust the balance control for minimum sound.
Is the balance control centered, or offset from center?
If the balance control is centered, the speakers put out the same volume.
If the balance control is significantly off center, they have different outputs.
This assumes that your volume control tracks properly.
To confirm your diagnosis of the speaker being the problem,
first place the speakers face to face about 3cm apart.
Reverse the leads on the back of ONE of the speakers.
Play music in MONO at the normal position of the volume control.
Adjust the balance control for minimum sound.
Is the balance control centered, or offset from center?
If the balance control is centered, the speakers put out the same volume.
If the balance control is significantly off center, they have different outputs.
This assumes that your volume control tracks properly.
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Again, knowing nothing about the system, schematics, model numbers, etc, the comments are guesses and speculations.
Hello everyone, thank you for your replies. After a lot of checking I discovered my amp is at fault... somehow. Here are the specs:
AMP: Denon AVR-4306
WOOFER: SB15NAC30-4 (4 ohm, I checked both with a multimeter).
No crossover, no schematic.
The Ohm output of my amp, left-channel is 36 Ohm and the right one is 18 ohm. Did I fry something in the amp, maybe?
AMP: Denon AVR-4306
WOOFER: SB15NAC30-4 (4 ohm, I checked both with a multimeter).
No crossover, no schematic.
The Ohm output of my amp, left-channel is 36 Ohm and the right one is 18 ohm. Did I fry something in the amp, maybe?
Start back at the beginning,
Set amp to MONO.
Do both speakers play at the same volume?
If not, turn off, and disconnect and exchange (move) the speakers between the channels.
Does the imbalance follow the speaker, or stay on the same side?
If the imbalance stays on the same side, the speakers are ok.
Use a CD source. At the CD input sockets, swap the L and R plugs.
Does the imbalance stay on the same side?
If so, the problem is in the amp.
You may have a dirty switch, or a part failure.
What amplifier do you have?
Set amp to MONO.
Do both speakers play at the same volume?
If not, turn off, and disconnect and exchange (move) the speakers between the channels.
Does the imbalance follow the speaker, or stay on the same side?
If the imbalance stays on the same side, the speakers are ok.
Use a CD source. At the CD input sockets, swap the L and R plugs.
Does the imbalance stay on the same side?
If so, the problem is in the amp.
You may have a dirty switch, or a part failure.
What amplifier do you have?