KEF Q150 help needed!

[MaxwellsEq]

I'm not sure if this is the correct way and quite honestly it defeats all logic in my opinion (maybe somebody can explain why?), I had to connect one of the speakers to port A of the Sony receiver and the other speakers to port B. Then I chose the A+B option on the receiver to get the sound from both speakers. This is the only possible way for them both to work at the same time

You are correct - that is strange. If you only use one speaker (as an experiment) and with A only selected, can you plug it into the A Left red and black sockets and hear the left channel OK. If you then plug it into the A Right red and black terminals do you hear the right channel?

 

[Astoneroad]

Where are you located?

 

[Grom]

Where are you located?

Vancouver, Canada.

 

[Grom]

You are correct - that is strange. If you only use one speaker (as an experiment) and with A only selected, can you plug it into the A Left red and black sockets and hear the left channel, OK? If you then plug it into the A Right red and black terminals do you hear the right channel?

Either of the speakers works when plugged in A Front left and they would also work in B Front right but only when plugged individually. As soon as I plugged both of them in either one of A left and right or B left and right, only one would work but not the other. So the only way they work is when I plugged them how I did. This is with a Sony strk870p receiver.

Unfortunately, none of the plug combinations work with the Sansui amplifier.

Blows my mind!

 

[Grom]

You are correct - that is strange. If you only use one speaker (as an experiment) and with A only selected, can you plug it into the A Left red and black sockets and hear the left channel, OK? If you then plug it into the A Right red and black terminals do you hear the right channel?

Either of the speakers works when plugged in A Front left and they would also work in B Front right but only when plugged individually. As soon as I plugged both of them in either one of A left and right or B left and right, only one would work but not the other. So the only way they work is when I plugged them how I did. This is with a Sony strk870p receiver.

Unfortunately, none of the plug combinations work with the Sansui amplifier.

Blows my mind

 

[MaxwellsEq]

Unfortunately, none of the plug combinations work with the Sansui amplifier.

In that case, I think you can assume the Sansui is broken, and you can either get rid of it or repair it.

Either of the speakers works when plugged in A Front left and they would also work in B Front right but only when plugged individually. As soon as I plugged both of them in either one of A left and right or B left and right, only one would work but not the other. So the only way they work is when I plugged them how I did. This is with a Sony strk870p receiver.

That's extremely strange. It proves a couple of things: your speakers and turntable are OK.

It's hard to know what to suggest. It's possible that the KEFs are sufficiently difficult a load for the Sony to only be able to drive one of them at a time from the front or rear amplifier.

 

[Astoneroad]

Borrow an amp, or order a Wiim Pro on Amazon to determine if your Sansui is the problem. I suspect that you'll love the Wiim and want to keep it, otherwise you can return it and decide what to do next, depending upon repair costs. Either way, you'll have answered your original question.

 

[Grom]

Borrow an amp, or order a Wiim Pro on Amazon to determine if your Sansui is the problem. I suspect that you'll love the Wiim and want to keep it, otherwise you can return it and decide what to do next, depending upon repair costs. Either way, you'll have answered your original question.

Great idea. I have already ordered Toppings dx10s and though i know they are a similar devices I guess that Wiim would be a better choice because it's easier for streaming from Spotify.

Wiim's built in DAC is not as good as Toppings itself but Wiim is perhaps more convenient.

Where do you stand on this, and which device is better for my setup in your opinion?

BTW, where do you live?

 

[Grom]

In that case, I think you can assume the Sansui is broken, and you can either get rid of it or repair it.

That's extremely strange. It proves a couple of things: your speakers and turntable are OK.

It's hard to know what to suggest. It's possible that the KEFs are sufficiently difficult a load for the Sony to only be able to drive one of them at a time from the front or rear amplifier.

I will look into servicing Sansui so that I can use it in the future.

With Sony strk870p I also tried a different set of old speakers yesterday and I encountered the same problem as i did wit KEFQ150 when of the Front A ports work work with only 1 speaker and not both plugged in. Basically the same issue. Maybe it's the Sony receiver. Who knows, at least my KEF's work when plugged like my picture shows.

 

[Astoneroad]

Don't worry about the DACs, they are both transparent. You won't be able to hear a difference in a blind test. The Wiim is an all in one amp, streamer, dac with eq and sufficient connectivity options and a value for under $400. Check out Amir's review: Wiim Amp Pro Review

You'd have to buy additional boxes with the DX10s to match functionality. I've owned the Wiim and almost choose it over my 300W McIntosh because it was so versatile, but sometimes I just need more power... like with the Salons... lol. (I'm in Vegas.)

 

[Astoneroad]

I will look into servicing Sansui so that I can use it in the future.

You mentioned it's a unicorn. From what I found, you're right. The only question is how much does it cost to get a unicorn back into shape? You might post another thread asking about that. There are guys who love those vintage Japanese amps on ASR.

 

[Grom]

Don't worry about the DACs, they are both transparent. You won't be able to hear a difference in a blind test. The Wiim is an all in one amp, streamer, dac with eq and sufficient connectivity options and a value for under $400. Check out Amir's review: Wiim Amp Pro Review

You'd have to buy additional boxes with the DX10s to match functionality. I've owned the Wiim and almost choose it over my 300W McIntosh because it was so versatile, but sometimes I just need more power... like with the Salons... lol. (I'm in Vegas.)

View attachment 411859

Sweet setup!!!
I almost relocated to Vegas a few months ago.

 

[Grom]

You mentioned it's a unicorn. From what I found, you're right. The only question is how much does it cost to get a unicorn back into shape? You might post another thread asking about that. There are guys who love those vintage Japanese amps on ASR.

I will do that, thank you.

 

[Astoneroad]

Sweet setup!!!
I almost relocated to Vegas a few months ago.

Funny, I'm looking at relocating to a suburb of Vancouver in the next year or so. I've started a thread about it: https://audiosciencereview.com/foru...as-an-ex-pat-input-welcome.58353/post-2135036

 

[Grom]

That is funny. If you do, it would be nice to meet you in person. I live in Burnaby.

 

[Astoneroad]

I will do that, thank you.

I looks like those sell between $500-1000 usd, so you might come out of it with new gear and a couple $ to spare, if that's the path you choose. If so, if you donate here, you can list it for sale to the sort of buyer that might be interested in vintage gems, not to mention supporting Amir's educational efforts. https://www.hifishark.com/model/sansui-au-777-a

 

[MaxwellsEq]

Basically the same issue. Maybe it's the Sony receiverr

I think it is. Definitely time to get new electronics. Some older kit is interesting, but mostly the newest gear performs as well if not better than the vintage stuff.

 

[AnalogSteph]

The Sony appears to have been part of the HT-DDW870 home theater system retailing for $299 (I guess US) in the mid-2000s. My guess would be protection relay contact issues, which is not uncommon. The unit may have one relay per set of outputs.

The Sansui is a nice old piece of kit but it is over 50 years old at the end of the day. Since it has a separate preamp and power amp stage you can test those individually; notably, you can connect a DAC with volume control to MAIN IN and verify power amp functionality this way. As an aside, missing pre-main bridges are a common reason for no sound.

 

[Grom]

The Sony appears to have been part of the HT-DDW870 home theater system retailing for $299 (I guess US) in the mid-2000s. My guess would be protection relay contact issues, which is not uncommon. The unit may have one relay per set of outputs.

The Sansui is a nice old piece of kit but it is over 50 years old at the end of the day. Since it has a separate preamp and power amp stage you can test those individually; notably, you can connect a DAC with volume control to MAIN IN and verify power amp functionality this way. As an aside, missing pre-main bridges are a common reason for no sound.

Good to know. Thank you.