replacing hifi speaker tweeter?

Started by mr magnolia, August 12, 2015, 12:03:07 AM

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mr magnolia

Hi, I know there are a few HiFi buffs out there, and I need your help!

Got a pair of (now discontinued) TDL RTL2 floorstander speakers from around 1994/5.
The tweeter in one seems broken as it gives out a loud crackling noise when playing the turntable, CD, radio or tv,

I've contacted Lockwood Audio and Wilmslow Audio, who at first search seem to be the main options, but neither can offer direct replacements for my particular speaker bits.

Any other specialists that I could contact? Any info or thoughts gratefully received!
Thanks in advance,
Donald

MalcolmInN

#1
Quote from: mr magnolia on August 12, 2015, 12:03:07 AMor thoughts gratefully received!
Hi Donald,
I guess you have tried TDL themselves ?
http://www.tdl-loudspeakers.co.uk/rtl2.htm
quote
Contact Us
TDL Electronics
Gallery Court,
Hankey Place,
London SE1 4BB,
England
Email: info@tdl-loudspeakers.co.uk
TDL Electronics is a brand of Audio Partnership Plc
Registered Office:
Gallery Court, Hankey Place, London SE1 4BB, United Kingdom
Registered in England No. 2953313

If a 'restoration'/ 'reconstitute' project I have no help, sorry !

but at a listening level I'd be thinking of a wire cutter job and substitute an active system around a current sp/driver,
sharp intake of breath -  'gainclone' tech has come on leaps and bounds in recent years - with an active filter/equaliser to suit ?? (or even use the existing xover net ? )

PS Not sure if I qualifiy as a buff ?? !


Zogbert Splod

Don't take this the wrong way, but have you tried swapping the feed to the speakers to confirm that the fault is in the speaker for sure and not in the amp?  I'm not going to say why I know this is a possible thing! :-[
"When in trouble, when in doubt, run (trains) in circles..." etc.
There, doesn't that feel better? 
Lovely!

Planning thread:
http://www.ngaugeforum.co.uk/SMFN/index.php?topic=25873.0

My website: Zog Trains

Run what thou wilt shall be the whole of the law
I may appear to be listening to you, but inside my head, I'm playing with my trains.

mr magnolia

Malcolm
I think TDL doesn't function any more - that link doesn't go anywhere allowing direct contact info, which matches what someone else advised me. I'm afraid I don't understand the rest of your words though! :$ :-)

Zog - I've not actually tried that although I maybe will now, although I've assumed it's not an amp thing. I have the speakers wired so the tweeters and the bass are driven as 2 sets of speakers from the one amp (Arcam 6) so I'm assuming that the bass and treble cones would both be affected if the amp was giving any trouble - but I guess there may be an issue in the one of the 2 speaker drive lines?

MikeDunn

Quote from: mr magnolia on August 12, 2015, 08:13:00 AM
I have the speakers wired so the tweeters and the bass are driven as 2 sets of speakers from the one amp
Are you saying you're driving both speakers off the same output ?  Surely you have a left & a right output (maybe more granular) ?  If so, I think he's meaning "swap these" - see (hear  :P) if the fault moves ...  If so, may be the wires, may be the specific output, but at least you'll know it's not the speakers  :no:

mr magnolia

#5
Mike

I have the speakers wired from an amp that will drive 2 sets of speakers.
Speakers 1 are the woofers. Speakers 2 are the tweeters. I can switch speakers 2 on and off while speakers 1 carry on as default speakers.
This may or may not be what I vaguely remember as a form of bi-wiring!

It's all a bit vague - I've had the kit so long that when it gets moved about, the wires sort of naturally are shaped to show what goes where.

I've just now swapped the speaker 1 and 2 cables around at the terminations on each speaker cabinet (each double pair cable to each speaker remains unchanged, and ive not changed anything on the amp connectors...) to see if the fault then shows in the woofers.

It doesn't.

Head scratchingly though, the fault doesn't now show on the tweeter in question either...

It's beginning to feel a bit like wiring a reverse loop with interconnecting sidings!


I shall subject the children to loud dad music around tea time, when they will likely be getting up, and see if anything changes with time and different sources.

MikeDunn

So ... you swapped the cables around and the fault has gone ?

Have you swapped them back again ?  If so - still gone ?  That would imply the tweeter connection was not making proper contact before ?

mr magnolia

Hmm, guess I'll have to do that, although I had previously checked that connection were secure.

I was considering maybe going for the 'leave well alone' approach!

mr magnolia

#8
More hmm.

Now the fault exhibits when both woofers and tweeters are being driven.
Either on their own seem fine, and no matter which way around the cables attach.
It's just the one speaker, and its a stastic type sound that comes with increased volumes, and sounds a bit like the noise you get when the needle is on the run out groove at the end of a record.

Does that make me think speaker problem or amp problem?  :confused2:

Malc

Have you swapped the speakers left and right?
The years have been good to me, it was the weekends that did the damage.

Steve Brassett

#10
Normally when biwiring speakers, both connections for one speaker at the amp end come from one speaker output (mainly because most amps only have one set of speaker outputs).  I wonder if there is anything going on because you are using both sets at the same time to the same speakers.  A second thought - have the crossovers been disabled, so that the tweeter and bass speakers are electrically separate?

mr magnolia

Swapping speakers: not done but maybe up next! They are marked right and left though, so not sure if that's permissable?

'crossovers'? If that's the external bits that join up the connector pairs at the back office speaker then, yes, they are off. And have been for over 20 yrs. The problem will come when you ask me to put them back on!

Malc

The left and right marked on the speakers have no meaning in the audio world. As long as they are paired when bought, they aren't handed.
The years have been good to me, it was the weekends that did the damage.

mr magnolia

Thanks for that. Disappointed that the high flying hi-fi world allows left to be right. Even more like trains...
Anyway, I've swapped them and shown the fault moves with the speaker.

Woofer and tweeter sound fine alone but tweeter sounds borked when they play together. That seems to be the confirmed issue - so what's best to do now?
Find new tweeter? Refurb speakers? Don't want to buy new, really. Imagine getting that past the house finance committee!

Donald

MikeDunn

Must be misunderstanding something ... the fault moves with the speaker ?  So the other speaker has it now  ???  Or it stays with the speaker  ???

If it moves - not the speaker ...   If it stays - you sound happy with them otherwise; I'd go for a refurb ...

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