Uneven speaker response

[farflungstar]

Why might one speaker have a better low frequency response?

So for a long time I've noticed that my right ANe has been deficient in low bass, below about 40hz in comparison to the left. I've put it down to the room but yesterday I swapped them over and whilst the room makes a difference there is definately a difference in output between them. Why might this be? I'm loathe to open the offending speaker up as they are a nightmare (old style) - but could it be something as simple as placement of wadding?

[Lawrence001]

Or it could be something amiss in the crossover

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[Bourney]

Could be a poor joint or a crossover component. I'm sure there used to be a variable resistor in there. Pretty easy to swap the bass drivers over to take them out of the equation. Remake the biwire link connections if you're single wiring.

[walpurgis]

It could be that one bass driver has a lower compliance to the other, due maybe to a unit having been replaced at some time and the physical spec being different. Do the bass/mid units look identical?

Also, there could be differences in the type or amount of internal damping material between the two speakers.

[Bourney]

My Es have a newer bass unit in one due to one getting damaged but I can tell no difference in output and imaging is stable (superb in fact). I have to say though, when I bought the driver, Audionote advised that you could experience differences with using different aged units.

[farflungstar]

The drivers look identical in every way including age. The variable resistor is for the tweeter.

Opening these up is a fking nightmare as they are fixed with blue tac (or similar) and it destroys the chipwood when prising the drivers out - would a bad solder joint really have this effect? Passing through everything above 40hz (guessing) but very very little below? I can imagine wadding might have that effect... I don't know what to do - having lived with them for a couple of years and intending to buy new speakers in October I don't know whether to leave well alone.

[hifinutt]

needs sorting otherwise you won`t be able to sell them ! are there no Spanish hi fi speaker repairers ?

[Bourney]

You can get the drivers out if you're careful and patient. Mine are older ones and there was No damage when I removed them.

[User211]

If you have a test mic press it into action and post the FR results?

Might provide further clues but will definitely show the extent of the problem if you know what you are doing. Best done with one speaker at a time in the same position without moving the test mic between samples.

[cooky]

A technique I adopt where a mastic/gasket has been used is to remove the screws/bolts, then using allen keys in the mount holes-get a mate to help, 4 is better than 2, prize the driver frame away from the cab. Take care not to bash the cone, use a circle of cardboard as protection.Dont bend the frame-it works best on cast frames like Tannoys.