A60 Power Amp problem
-
- Posts: 1027
- Joined: Mon Jul 29, 2019 8:16 am
- Location: Grimsby/Phnom Penh
- Has thanked: 1539 times
- Been thanked: 429 times
A60 Power Amp problem
Well I've stripped down the system today trying to find the source of crackling in the left hand speaker. I've also had a hum on both speakers which I've put down to the phonostage, so have purchased a 4 shelf to replace a 2 shelf rack which I'm hoping will sort the problem giving a larger distance between phono and power supplies. I've only set up the digital side of things for now and the crackling still exists, even when unplugging the inputs in the power amp so one can assume I have a fault in the power amp. I will dig out an old intergrated tomorrow to confirm, but if it's the fault of the A60 is it just sent back to NVA with an appropriate note?
- savvypaul
- Posts: 8793
- Joined: Tue Oct 11, 2016 7:14 pm
- Location: Durham
- Has thanked: 1676 times
- Been thanked: 3069 times
- Contact:
-
- Posts: 1027
- Joined: Mon Jul 29, 2019 8:16 am
- Location: Grimsby/Phnom Penh
- Has thanked: 1539 times
- Been thanked: 429 times
Re: A60 Power Amp problem
At the moment one channel Paul. It an crackling sound, constant but louder and softer noises. Hope this helps.
- karatestu
- Posts: 5994
- Joined: Sun Jan 08, 2017 4:40 pm
- Location: North Yorkshire
- Has thanked: 1885 times
- Been thanked: 1425 times
Re: A60 Power Amp problem
If its a rustling noise then you have a couple of mice nesting in there
DIY FREE ZONE
- savvypaul
- Posts: 8793
- Joined: Tue Oct 11, 2016 7:14 pm
- Location: Durham
- Has thanked: 1676 times
- Been thanked: 3069 times
- Contact:
Re: A60 Power Amp problem
OK. Swap the speaker leads over at the amplifier outputs - take out the red cables FIRST, re-insert the red cables LAST.
Does the noise change channel or stay in the same channel?
-
- Posts: 1027
- Joined: Mon Jul 29, 2019 8:16 am
- Location: Grimsby/Phnom Penh
- Has thanked: 1539 times
- Been thanked: 429 times
Re: A60 Power Amp problem
Why didn't I think about swopping speaker cables
Anyway just done that and the crackling has moved to the right hand side speaker, more intermittent. This is with the input cables removed.
Anyway just done that and the crackling has moved to the right hand side speaker, more intermittent. This is with the input cables removed.
-
- Posts: 1027
- Joined: Mon Jul 29, 2019 8:16 am
- Location: Grimsby/Phnom Penh
- Has thanked: 1539 times
- Been thanked: 429 times
Re: A60 Power Amp problem
I have changed the cables back, there is intermittent crackling on the left hand side speaker and also a low level noise when putting your ear next to the speaker. There is no noise coming from the right hand side speaker.
- savvypaul
- Posts: 8793
- Joined: Tue Oct 11, 2016 7:14 pm
- Location: Durham
- Has thanked: 1676 times
- Been thanked: 3069 times
- Contact:
Re: A60 Power Amp problem
OK.
In that case it points to a fault on one of the amplifier boards. I will double check with Tomasz that I haven't overlooked anything...then PM you with the next steps.
In that case it points to a fault on one of the amplifier boards. I will double check with Tomasz that I haven't overlooked anything...then PM you with the next steps.
-
- Posts: 1027
- Joined: Mon Jul 29, 2019 8:16 am
- Location: Grimsby/Phnom Penh
- Has thanked: 1539 times
- Been thanked: 429 times
Re: A60 Power Amp problem
Thanks Paul, I'll be posting my P90 on Monday. Got a Yamaha AS300 in the system now so at least there's music.
- slinger
- Posts: 9367
- Joined: Wed Aug 22, 2012 4:30 pm
- Location: The Garden of England
- Has thanked: 4812 times
- Been thanked: 3205 times
Re: A60 Power Amp problem
If you give it a "slap" and the crackling stops or gets worse, it's probably a dry joint.
NO!! I AM NOT RECOMMENDING THAT. IT WAS A JOKE. SUCH TESTS SHOULD ONLY BE CARRIED OUT UNDER LABORATORY CONDITIONS AND BY QUALIFIED ELECTRONICS ENGINEERS.
NO!! I AM NOT RECOMMENDING THAT. IT WAS A JOKE. SUCH TESTS SHOULD ONLY BE CARRIED OUT UNDER LABORATORY CONDITIONS AND BY QUALIFIED ELECTRONICS ENGINEERS.
Amps - NVA P50, AP30, A40, Stanislav Palo Tube Headphone Amp BB 85
Speakers - Monitor Audio Silver RX2
Cables - NVA LS1+LS3, SSC, Gotham S/PDIF, IBRA Optical
Digital - NAD C516BEE, SONY ST-SDB900 DAB TUNER, TEAC UD-H01 DAC
Analogue - Pro-Ject Debut Carbon Esprit SB, Graham Slee Gram Amp 2 Phono
Cans - Grado SR80, ATH-M50X
Speakers - Monitor Audio Silver RX2
Cables - NVA LS1+LS3, SSC, Gotham S/PDIF, IBRA Optical
Digital - NAD C516BEE, SONY ST-SDB900 DAB TUNER, TEAC UD-H01 DAC
Analogue - Pro-Ject Debut Carbon Esprit SB, Graham Slee Gram Amp 2 Phono
Cans - Grado SR80, ATH-M50X