Location: Middlesex, UK
Posts: 4,482
I'm Alex.
Location: Northern Ireland
Posts: 32
I'm Emmett.
Hi,
Multimeter arrived and I tested the Coles (out of circuit). It read at 3.2 ohm for one and 2.9ohm for the other. Is this significant when the tweeters are rated at either 8ohm or 16ohm?
Tried it again with the cords connected back in to the crossover and it measure the same.
Last edited by Emmett123; 14-05-2020 at 11:15.
Location: Middlesex, UK
Posts: 4,482
I'm Alex.
Last edited by spendorman; 14-05-2020 at 12:28.
Spendorman
I'm rather late on this great thread but yes it does sound like the Coles are goners. At least new replacements don't break the bank from Falcon.
I am fairly sure that the ones in my DM2a are dead too. Despite what people say I think if you are young enough you really do notice their absence- I don't have the data in front of me but the crossover point isn't astronomically high- 13kHz?
We hear this as a lack of air and what I always refer to as a lack of "crystalline" sound. I certainly have noticed something different, and I can't hear them anymore when I put my ear next to them- which I can on my similarly-Coles-equipped Mordaunt Short MS400.
Location: Northern Ireland
Posts: 32
I'm Emmett.
You can't just change a tweeter to a different spec or model without altering the crossover to suit. Better to stick with original types unless you're feeling adventurous .
It is impossible for anything digital to sound analogue, because it isn't analogue!
Location: Middlesex, UK
Posts: 4,482
I'm Alex.
Re the Coles 4001G units, I don't understand how the resistance (~ 23 Ohm) can be greater than the impedance (~ 15 Ohm).
But having sold some 4001Ks a few years ago, I did measure the DC resistance and it was around 23 Ohm, with accceptable and expected unit-to-unit variation.
Barry