In article ,
David wrote:
Hello,
I'm after a replacement drive unit for a Technics PX20 electric piano and am
not getting very far with Panasonic. They have told me that the part number
is EAS16PL403A and that it is no longer available and there is no
replacement part. Admittedly the Piano was bought in 1989 so I'm not
surprised that they don't have spares.

Does anybody here know of a replacement that I could try (I'd obviously
replace both not just the blown one)?

Alternatively what details do I ask Panasonic for regarding the
specification of the speaker?

Full range or not?
Impedance?
Size?
Sensitivity?
Anything else?

I very much doubt it uses anything fancy, so it would be more of a
question of getting something that physically fits. The power handling and
impedance are probably marked on the speaker. Or the power output of the
amp given in the handbook.

http://www.wilmslow-audio.co.uk/

would be a good start for a replacement.

--
*Filthy stinking rich -- well, two out of three ain't bad

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message
what details do I ask Panasonic for regarding the
specification of the speaker?

Full range or not?
Impedance?
Size?
Sensitivity?
Anything else?

I very much doubt it uses anything fancy, so it would be more of a
question of getting something that physically fits. The power handling and
impedance are probably marked on the speaker. Or the power output of the
amp given in the handbook.

http://www.wilmslow-audio.co.uk/

would be a good start for a replacement.


Thank you Dave,

I'm fairly sure it's a 2x40 watts RMS amplifier but we haven't found the
handbook yet.
The piano is in everyday use so I was hoping that Panasonic would be able to
tell me the spec of the speaker before I dismantle it.
I shall open it up and have a look.

Thanks for the link.

Regards

David

"David"

I'm fairly sure it's a 2x40 watts RMS amplifier but we haven't found the
handbook yet.

** Got eyeballs ??

The piano is in everyday use so I was hoping that Panasonic would be able
to tell me the spec of the speaker before I dismantle it.

** Wot a ****WIT !!!

I shall open it up and have a look.

** Watch out for all the creepy crawlies....



..... Phil

Dave Plowman (News) wrote:


I very much doubt it uses anything fancy, so it would be more of a
question of getting something that physically fits. The power handling and
impedance are probably marked on the speaker. Or the power output of the
amp given in the handbook.

Isn't the rule of thumb that the impediance is about 1.5 times the DC
resistance - hence measure the good unit and multiply by 1.5?


But as Dave P says, probally not that critical here.

Pete

--
http://www.petezilla.co.uk

"Peter Chant"

Isn't the rule of thumb that the impedance is about 1.5 times the DC
resistance - hence measure the good unit and multiply by 1.5?


** The ratio of DC resistance to nominal impedance for a low/mid frequency
driver is usually close to 1.2

This assume the impedance (Z) is measured at 250 to 400Hz ( where Z is a
minimum) and with low power so the voice coil does not heat.

The ratio represents the additional mechanical ( friction) losses in the
driver's suspension, eddy currents in the magnet structure plus of course
radiated sound.



..... Phil