VOGONS


First post, by GabrielKnight123

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Does anyone recognise this old pc speaker and logo, the one pictured is the non powered second channel and I'm working on getting the powered one that is exactly the same but it has a power button with volume and bass dials. IIRC I bought them in the 90's and I'm trying to repair the simple amp in the powered one. On the PCB is "LS118" and on the non powered speaker is "LS-118" I'm looking to identify the brand of "LS" so I can hopefully find a manual/service manual as some of the electrolytic capacitors were not in the same orientation as what is silk screened, the capacitors could be bipolar but I don't have enough info, I've heard before sometimes this happens from design mistakes not capacitors being bipolar. One output channel wasn't working because of 2 bad caps and a few are just out of limits if they are 10% caps, I'm going to ask at badcaps.net about some of the caps but I'm hoping someone knows this speaker set.

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Reply 1 of 9, by darry

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I had a hunch that they are an attempt to capitalize on the look of these [1],but the Tannoy brand ones are more recent.

I am no expert on speakers and amps, but I would guess that if the drivers are still good and if you can replace the caps in the crossover network, you might be better off getting a new amp in there. EDIT: Maybe something similar to this https://www.amazon.ca/Amplifier-DROK-Immersio … s/dp/B077M526SB

[1]
https://m.hifidatabase.com/Tannoy_Mercury%20mXR-M_5235.php

Reply 2 of 9, by shevalier

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darry wrote on 2023-10-23, 15:49:

I would say more like these Accutons.
duke2_Gallery4.jpg
Wait, were you not kidding?
There is nothing in common there at all, except for the color and location of the speakers.
Starting with the fact that the Tannoy have a dome tweeter, and the author of the topic has an ordinary small paper driver.

To be completely honest, I would not recommend restoring this.
Starting with the fact that over 30 years all impregnations and plasticizers have evaporated from the paper of drivers. And ending with the fact that recently measurements and simulators have begun to be used in the design of even simple acoustic systems.
Modern ones are simply better.

Last edited by shevalier on 2023-10-23, 16:38. Edited 1 time in total.

Aopen MX3S, PIII-S Tualatin 1133, Radeon 9800Pro@XT BIOS, Diamond monster sound MX300
JetWay K8T8AS, Athlon DH-E6 3000+, Radeon HD2600Pro AGP, Audigy 2 Value

Reply 3 of 9, by GabrielKnight123

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shevalier wrote on 2023-10-23, 16:23:
I would say more like these Accutons. https://reference-audio.ams3.cdn.digitaloceanspaces.com/_1720x920_fit_center-center_none/d […]
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darry wrote on 2023-10-23, 15:49:

I would say more like these Accutons.
duke2_Gallery4.jpg
Wait, were you not kidding?
There is nothing in common there at all, except for the color and location of the speakers.
Starting with the fact that the Tannoy have a dome tweeter, and the author of the topic has an ordinary small paper driver.

Eh it doest matter shevalier the ball is rolling so I hope someone recognises mine, I've tried a picture upload lookup with the LS logo but it didn't have any success

Reply 4 of 9, by GabrielKnight123

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darry wrote on 2023-10-23, 15:49:
I had a hunch that they are an attempt to capitalize on the look of these [1],but the Tannoy brand ones are more recent. […]
Show full quote

I had a hunch that they are an attempt to capitalize on the look of these [1],but the Tannoy brand ones are more recent.

I am no expert on speakers and amps, but I would guess that if the drivers are still good and if you can replace the caps in the crossover network, you might be better off getting a new amp in there. EDIT: Maybe something similar to this https://www.amazon.ca/Amplifier-DROK-Immersio … s/dp/B077M526SB

[1]
https://m.hifidatabase.com/Tannoy_Mercury%20mXR-M_5235.php

Those $30 boards only have volume no bass and my speakers have sentimental value I will fix the caps first to see if the second channel works again

Reply 5 of 9, by shevalier

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If it is completely impossible to determine the polarity of the coupling capacitors,
then WIMA produces MKS02 film capacitors with a distance between leads of 2.5 mm.
Capacitance up to 1 µF is available.
https://www.wima.de/wp-content/uploads/media/ … WIMA_MKS_02.pdf
If you need a capacitance of up to 10 μF, then MKS2
Better than electrolytes, worse than polypropylene.
High quality conventional capacitor made of metallized polyester.

Aopen MX3S, PIII-S Tualatin 1133, Radeon 9800Pro@XT BIOS, Diamond monster sound MX300
JetWay K8T8AS, Athlon DH-E6 3000+, Radeon HD2600Pro AGP, Audigy 2 Value

Reply 6 of 9, by darry

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shevalier wrote on 2023-10-23, 16:23:
I would say more like these Accutons. https://reference-audio.ams3.cdn.digitaloceanspaces.com/_1720x920_fit_center-center_none/d […]
Show full quote
darry wrote on 2023-10-23, 15:49:

I would say more like these Accutons.
duke2_Gallery4.jpg
Wait, were you not kidding?
There is nothing in common there at all, except for the color and location of the speakers.

I get the impression that either I might have been unclear or you misunderstood me (or both).

Please allow me to rephrase and clarify .

When I said

I had a hunch that they are an attempt to capitalize on the look of these

, I meant to suggest that it looked to me like OP's LS-118 speaker might have been intentionally designed to copy ("rip-off") the visual style of that Tannoy model (or a similar one), nothing more, nothing less .

It is obvious that the drivers are different between these as are other things (such as the fact that the Tannoy ones are not amplified).

My comment about [1] was meant as an example of how one might retrofit the LS-118 with a newer amplifier and had nothing to do with the Tannoy

[1]
https://www.amazon.ca/Amplifier-DROK-Immersio … s/dp/B077M526SB

Reply 7 of 9, by darry

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GabrielKnight123 wrote on 2023-10-23, 16:42:
darry wrote on 2023-10-23, 15:49:
I had a hunch that they are an attempt to capitalize on the look of these [1],but the Tannoy brand ones are more recent. […]
Show full quote

I had a hunch that they are an attempt to capitalize on the look of these [1],but the Tannoy brand ones are more recent.

I am no expert on speakers and amps, but I would guess that if the drivers are still good and if you can replace the caps in the crossover network, you might be better off getting a new amp in there. EDIT: Maybe something similar to this https://www.amazon.ca/Amplifier-DROK-Immersio … s/dp/B077M526SB

[1]
https://m.hifidatabase.com/Tannoy_Mercury%20mXR-M_5235.php

Those $30 boards only have volume no bass and my speakers have sentimental value I will fix the caps first to see if the second channel works again

I completely understand. Hopefully someone will be able to provied some background on these speakers .

Best of luck with the project .

Reply 8 of 9, by megatron-uk

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I love my Mercury M1's. They're getting close to 30 years old at this point and still sound fabulous.

They were definitely trying to capture the look of the Mxr range with the op's speakers.

My collection database and technical wiki:
https://www.target-earth.net

Reply 9 of 9, by GabrielKnight123

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Thanks Darry I'll get them working even if I have to replace every component and put a new cushion on the speakers, I think I was 16 years old when I saved up for them that would be around 1994 and if I got the year right mine were made before your example but if I got the year wrong they could be a copy of a brand that was already out, though I do remember my awesome family pc guy I bought them from told me they were really great quality speakers for the time he even used a set on his completely cluttered desk, he's the reason I'm not buying new ones to go with my 486 rig he passed away many moons ago