Quad artera pop/thump

[Italian Job]

The amp arrived, it's tiny but feels extremely solid.
Although... sounds comes out only from the left channel and I can hear quite a bit of ground noise.
Both channels work when tested one at the time, so odd!
Could be an impedance issue?

 

[Purité Audio]

That’s a nuisance, I can only suggest step by step process of elimination, which it sounds as if you have already tried.
Keith

 

[Redacted]

The amp arrived, it's tiny but feels extremely solid.
Although... sounds comes out only from the left channel and I can hear quite a bit of ground noise.
Both channels work when tested one at the time, so odd!
Could be an impedance issue?

By "ground noise" do you mean mains hum?
Can I assume you have tested different signal cables in all combinations?
There could be a connector issue.

 

[Italian Job]

That’s a nuisance, I can only suggest step by step process of elimination, which it sounds as if you have already tried.
Keith

Yes very annoying, I also tried with different speaker and XLR cables but the result didn't change.
IOM told me they only tested the rca connections before sending it out, so I'll need to send it back oof

 

[Italian Job]

By "ground noise" do you mean mains hum?
Can I assume you have tested different signal cables in all combinations?
There could be a connector issue.

by ground noise I mean a background hiss, yes like a bad rca hiss.

 

[Redacted]

Yes very annoying, I also tried with different speaker and XLR cables but the result didn't change.
IOM told me they only tested the rca connections before sending it out, so I'll need to send it back oof

OK, makes my question irrelevant, but I am unimpressed with the vendor's testing regime, and I hope you have written (email) agreement to get postage costs credited....

 

[Redacted]

You could get a refund and buy Nord instead - they were in Cheltenham, now Gloucester.
Here's just one model for £415. It can have XLR, but check details,

Nord Value-Line MP NCx252 Stereo Power Amplifier - Nord Acoustics Ltd

SPECIFICATION (Per Channel) • Standard Stereo Case (optional SE case) • Hypex NCore NC252MP twin channel Module • RCA or XLR Input • Auto sensing 100-240V mains input operation • 0.12W standby operation • 650W Main PSU • 47K Ohms Input Impedance, low output impedance • THD 0.0015% • S/N Ratio...

nordacoustics.co.uk

 

[Italian Job]

OK, makes my question irrelevant, but I am unimpressed with the vendor's testing regime, and I hope you have written (email) agreement to get postage costs credited....

Let's see if they cover the shipping costs! I'm sure they will.
I chose the IOM over the Nord purely for aesthetic reasons, I cannot get past how unpleasant their chassis design is.

 

[Redacted]

Let's see if they cover the shipping costs! I'm sure they will.
I chose the IOM over the Nord purely for aesthetic reasons, I cannot get past how unpleasant their chassis design is.

They offer [edit: case choice]though. And the amps might actually work!
I don't have one, so no vested interest. I have a CA Evo 75 which has been excellent to use (Hypex NC122), but probably a product ASR would dismiss.

 

[Italian Job]

They offer choice though. And the amps might actually work!
I don't have one, so no vested interest. I have a CA Evo 75 which has been excellent to use (Hypex NC122), but probably a product ASR would dismiss.

Yeah I agree! I heard only good things about Nord amps

 

[DavidEdwinAston]

Should my Quad gear fail! First, can Quad fix it? Then, by the look of things something from the Nord Value line would be perfect!

 

[Italian Job]

I did some more troubleshooting yesterday, and it turned out the issue was caused by faulty binding post caps!
As for the left channel not sounding very clear, that was because the wiring was inverted
At least I won't have to return it. Sipko is sending over a new set of caps, and I'll probably switch to banana plugs since they make a better connection.

 

[Italian Job]

Should my Quad gear fail! First, can Quad fix it? Then, by the look of things something from the Nord Value line would be perfect!

Absolutely, they will get it fixed

 

[Redacted]

Should my Quad gear fail! First, can Quad fix it? Then, by the look of things something from the Nord Value line would be perfect!

I think they still have repair capability in the UK.

Quad are now Chinese-owned, of course!, by International Audio Group, so should have solid backing, plus the kit will be made in China . IAG owns several British hi-fi manufacturers, including Audiolab, Wharfedale, Mission and Castle Acoustics; plus Japanese brand Luxman.

 

[Italian Job]

IOM felt that the experience wasn't up to the standard of service they aim to provide.
They offered me a 50% discount as a goodwill gesture, which I thought was a great example of customer service.
It shows how seriously the company takes looking after its customers