A question to Cyrus amp users...

[stereoman]

...hallo. With my amp (8vs2) there is a difference when I connect upper or lower sets of terminals. ( Single wiring ). Upper sets give me really edgy, too bright sound while the lower balance everything and sound much smoother. Is this also a matter with your amps ? In general there should be no difference between the terminals but there is. Is this a slight mechanical fault or simply the speakers are so sensitive that they sound differently depending on connection ?

 

[Blacksabbath25]

...hallo. With my amp (8vs2) there is a difference when I connect upper or lower sets of terminals. ( Single wiring ). Upper sets give me really edgy, too bright sound while the lower balance everything and sound much smoother. Is this also a matter with your amps ? In general there should be no difference between the terminals but there is. Is this a slight mechanical fault or simply the speakers are so sensitive that they sound differently depending on connection ?

wait there 13th will be along in a sec ! *smile*

 

[stereoman]

...hallo. With my amp (8vs2) there is a difference when I connect upper or lower sets of terminals. ( Single wiring ). Upper sets give me really edgy, too bright sound while the lower balance everything and sound much smoother. Is this also a matter with your amps ? In general there should be no difference between the terminals but there is. Is this a slight mechanical fault or simply the speakers are so sensitive that they sound differently depending on connection ?

wait there 13th will be along in a sec ! *smile*

lol...ok.

 

[Blacksabbath25]

...hallo. With my amp (8vs2) there is a difference when I connect upper or lower sets of terminals. ( Single wiring ). Upper sets give me really edgy, too bright sound while the lower balance everything and sound much smoother. Is this also a matter with your amps ? In general there should be no difference between the terminals but there is. Is this a slight mechanical fault or simply the speakers are so sensitive that they sound differently depending on connection ?

wait there 13th will be along in a sec ! *smile*

lol...ok.

I would help my friend but never owned any Cyprus gear but 13th is the man for the job

 

[stereoman]

...hallo. With my amp (8vs2) there is a difference when I connect upper or lower sets of terminals. ( Single wiring ). Upper sets give me really edgy, too bright sound while the lower balance everything and sound much smoother. Is this also a matter with your amps ? In general there should be no difference between the terminals but there is. Is this a slight mechanical fault or simply the speakers are so sensitive that they sound differently depending on connection ?

wait there 13th will be along in a sec ! *smile*

lol...ok.

I would help my friend but never owned any Cyprus gear but 13th is the man for the job

I believe...

 

[Vladimir]

The two pairs of terminals are just paralleled so it should impose no difference in sound or performance. Only thing I can think of is factory error during assembly where they wired one of the terminal pairs out of phase.

 

[stereoman]

The two pairs of terminals are just paralleled so it should impose no difference in sound or performance. Only thing I can think of is factory error during assembly where they wired one of the terminal pairs out of phase.

Yes. Right. But to my surprise there is a difference. I did not notice this with previous amps with both sets of terminals. But with this amp, there is an audible sound change. Depending which ones I use...strange.

 

[Vladimir]

Make sure you're not the one connecting the speakers out of phase. If the differences still occur, try the speakers intentionally out of phase on the less bassy terminals to confirm if its factory wiring error.

 

[stereoman]

Make sure you're not the one connecting the speakers out of phase. If the differences still occur, try the speakers intentionally out of phase on the less bassy terminals to confirm if its factory wiring error.

Checked. Not out of phase. Simply sound better on lower terminals. (?)

 

[insider9]

Make sure you're not the one connecting the speakers out of phase. If the differences still occur, try the speakers intentionally out of phase on the less bassy terminals to confirm if its factory wiring error. 

Checked. Not out of phase. Simply sound better on lower terminals. (?)

Question is which one is the intended sound? Many would argue that it may be the top terminal...

 

[Vladimir]

Weird!

Can you measure DC offset with a multimeter? (set for mV DC) By default there should be no differences between terminals.

 

[stereoman]

Make sure you're not the one connecting the speakers out of phase. If the differences still occur, try the speakers intentionally out of phase on the less bassy terminals to confirm if its factory wiring error.

Checked. Not out of phase. Simply sound better on lower terminals. (?)

Question is which one is the intended sound? Many would argue that it may be the top terminal...

Yes, indeed. With me it sounds better on lower. But the question is why there is a difference ?

 

[stereoman]

Weird!

Can you measure DC offset with a multimeter? (set for mV DC) By default there should be no differences between terminals.

Indeed strange. Now I cannot do this unfortunately...need to borrow or buy it (multimeter).

 

[Vladimir]

Let's hope Quest, drummerman and the Major have some info for solving this mystery.

 

[drummerman]

Sorry, have never tried to do a comparison. Will do in the next few days.

Cyrus circuitboards are upside down ie it hangs under the top plate so the upper terminals at the rear are closest to the board.

No idea if that makes one iota of difference but am prepared to accept it may do.

 

[Gray]

I've got the Cyrus 8, which I've opened up a couple of times. From memory I think the pairs of (BFA type) terminals are paralleled within the one, molded block.

In other words, there are just 2 legs soldered to the PCB feeding both pairs of parallel terminals.

So there's no way they can be wrongly connected relative to each other (or even as a block) during manufacture.

There is no very brief, intermittent, total loss of sound is there? You mean they are consistently, tonally very different? Though nobody doubts you, I think we're all saying it's not possible!

Just as well you're not bi-wiring as that would have led to further complications.

Out of interest, where are you located stereoman?

 

[Vladimir]

I doubt a cold solder joint on one of the terminal legs would make a tonnal difference. It would make intermittent sound or trip the protection.

 

[stereoman]

Out of interest, where are you located stereoman?

Germany.

 

[stereoman]

I doubt a cold solder joint on one of the terminal legs would make a tonnal difference. It would make intermittent sound or trip the protection.

Have been trying to reconnecting ( keep on plugging and unplugging several times to clean the upper terminals ) and moved away the speaker cable so it does not touch the metal post of my rack. Seems to be (sound) better but still a slight difference...I think the terminals might have been a bit dirty. Cyrus has these very specific hidden terminals.

 

[Vladimir]

Give them all a good clean with isopropyl alcohol and tooth brush with the unit fully unplugged from mains. Should be as good as new.

 

[stereoman]

Give them all a good clean with isopropyl alcohol and tooth brush with the unit fully unplugged from mains. Should be as good as new.

Yeah. But just looked with a pocket lamp and after some reconnecting they seem to be clean...maybe you're right, I'll try this out. Now still there is a significant sound difference. By upper giving me fatigue after a few minutes , with lower it sounds simply right.

 

[insider9]

Give them all a good clean with isopropyl alcohol and tooth brush with the unit fully unplugged from mains. Should be as good as new.

Yeah. But just looked with a pocket lamp and after some reconnecting they seem to be clean...maybe you're right, I'll try this out. Now still there is a significant sound difference. By upper giving me fatigue after a few minutes , with lower it sounds simply right.

A word of caution. Don't attempt to clean terminals that give you the sound that you enjoy. In case that the terminals you describe as worse are what the amp should sound like.

 

[Vladimir]

Give them all a good clean with isopropyl alcohol and tooth brush with the unit fully unplugged from mains. Should be as good as new.

Yeah. But just looked with a pocket lamp and after some reconnecting they seem to be clean...maybe you're right, I'll try this out. Now still there is a significant sound difference. By upper giving me fatigue after a few minutes , with lower it sounds simply right.

Ideally you want these cleaned with KONTAKT PRF and a brush. It evaporates without leaving residue. It's widely available in Germany I think.

 

[Vladimir]

Give them all a good clean with isopropyl alcohol and tooth brush with the unit fully unplugged from mains. Should be as good as new.

Yeah. But just looked with a pocket lamp and after some reconnecting they seem to be clean...maybe you're right, I'll try this out. Now still there is a significant sound difference. By upper giving me fatigue after a few minutes , with lower it sounds simply right.

A word of caution. Don't attempt to clean terminals that give you the sound that you enjoy. In case that the terminals you describe as worse are what the amp should sound like.

or

Clean all terminals and if that makes the amp sound worse, chuck it in the bin.

 

[stereoman]

Give them all a good clean with isopropyl alcohol and tooth brush with the unit fully unplugged from mains. Should be as good as new.

Yeah. But just looked with a pocket lamp and after some reconnecting they seem to be clean...maybe you're right, I'll try this out. Now still there is a significant sound difference. By upper giving me fatigue after a few minutes , with lower it sounds simply right.

Ideally you want these cleaned with KONTAKT PRF and a brush. It evaporates without leaving residue. It's widely available in Germany I think.

Yes I have a kontakt spray...I thought about it too.