@C-liv 

Hi Chris, welcome to the community.

They look like the glue spots that hold the connections between the voice-coil and the flexible leads on the back of the cone. They are present on most loudspeaker cones but are sometimes hidden by dust covers.

Thanks for the reply Rex. And I apologize for no formal intro to the community. Yes I thought that was the area where wires from voice-coil connect. Those spots were not visible before. When I turn Amps on those areas are warm and pliable as though melting, like a short or something!!? 

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@C-liv wrote:

Thanks for the reply Rex. And I apologize for no formal intro to the community. Yes I thought that was the area where wires from voice-coil connect. Those spots were not visible before. When I turn Amps on those areas are warm and pliable as though melting, like a short or something!!? 

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@C-liv 

Voice-coils do get warm when producing sound. If they get warm with the amps on but no music playing, I would worry about the amps. A short in a voice-coil would severely reduce the output - and is unlikely in two drivers. High-frequency oscillation in the amps could cause excessive heat in voice-coils.

Hi, send mail from Japan. I also have a old Tannoy.

Your case is 2 way buy new one or repair.

Even if the old speaker is distorted, it is difficult to answer because we do not know whether you are the same distortion, but the treble or bass or both, most often the edge supporting the cone deteriorates (always due to gravity For example, the voice coil relative to the magnet pulled down) does not maintain the correct position.
It's actually more complicated, but from the experience of JBL LE8T, this is probably the one thing that's wrong.

Relic is Japanese Old speaker repair shop 

cost is only in Japan, from UK is much more, you should consider first my word.

anyway my mail is usefull for you very grad to me, RGDS

https://relicfreq.com/works/961/

# 1 HPD385 The edge is deteriorated
# 3 HPD385 high frequency magnetic very iderably oxidized into the gap
# 4 HPD385 Low frequency magnetic Red rust is remarkable here
# 5 3839M Ferrite magnetism is also covered with oxide
# 6 3839M High frequency side voice coil oxidation
# 7 HPD385 Low frequency side voice coil oxidation (Originally red coated wire, one side oxidized to blue green)
# 8 HDP385 Hardware around the edge This also has red rust!
# 9 Westminster unit Connector Oxidized and deformed
# 10 Below is the photo after overhaul.

General repair price per unit
TANNOY HPD385 (Round connector type) Repair set: 1 pc. ¥ 64,500 (excluding tax)
TANNOY 3828, Westminster unit, etc. (with a square connector housing) Repair set: 1 pc. ¥ 68,500 (excluding tax)
Depending on the degree of oxidation of the magnet and the deterioration of each part, the above general repair price may be added. Formal quotes will be provided after the actual item is confirmed.

Hi, apologies for the delay in getting back to you, there is no set times or guidelines as to when to use the wax.  Personally i would just dust your speakers with a soft cloth andmaybe one or twice a year give them a soft waxing to keep the cabinets in a tip top condition.

@chubanina 

Hello Tsvetomir, welcome to the forum.

For a 2 metre run, the 1.0mm2 cable should be OK. 2.0mm2 cable is theoretically better but you probably would not be able to hear any difference. 

Hi,

Thank you for the answer. You might laugh but I currently use 4mm2 and I notice too much low frequencies...

I think it's an overkill to use such a thick cable...shall i change it? 

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@chubanina wrote:

Hi,

Thank you for the answer. You might laugh but I currently use 4mm2 and I notice too much low frequencies...

I think it's an overkill to use such a thick cable...shall i change it? 

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@chubanina 

The thicker cable should not cause a problem with the sound. These speakers can give too much bottom end in small rooms. If you have the space, you could try moving them away from walls and corners. 

Hi Gary ( @Ratnaguna ), 

Welcome to the community. This is usually caused by a worn out cable not the input jacks themselves.  Can you take a picture of the plugs and jacks so we can have a look? 

Ken

When this happens to me , I take a pair of needle nose pliers or a pair of small wir cutters and put a slight kink/bend in the RCA plugs outer shell in order to get a tight fit.  The RCA plugs center pin usually fits tight enough to not bother with. 

@bnobre69 , Please contact our spare parts department at:

https://www.tannoy.com/brand/tannoy/support#googtrans(en|en)

@Ozzie666 

The Behringer um2 doesn't have balance outputs so there is no cable to make a balanced connection.

Ohh I see... Thank you for your kind answer, if I may ask? What is the best way to connect Presonus eris 3.5 to my laptop? Should I look for a DAC with balanced output or go for Behringer um2 or just use the headphone jack and don't bother at all? 

@Ozzie666 

How about an RCA (normal Hi-Fi stereo) cable? That's the easiest.