I’m fortunate to have a pair of A40 mono blocks mk2 that I picked up second hand on eBay and have been using them for over a year now even though I have an A30 & an S80 (old A20).
These A40s were in poor state when received and were ‘for parts/spares- not working’
They tested good with my multi meter and visually no magic smoke so I fixed the cases, re soldered a few joins and added music- so far so good for about 18 months. Delightful music was the result.
I recently began to note the right mono block was becoming increasingly sensitive to source equipment being turned on/off whereas the left remained silent.
Opening up the case I was horrified to see the glue from the previous owners attempt to secure transformer, caps and board to chassis had ingress to a few components and was turning black from its natural clear/brown state- I had obviously missed this when first received and now was very obvious.
I full afternoon of stripping components, cleaning, replacing and cleaning the board has resulted in a return to normal operation- no noise and I’ve noted the sound stage to be more “equal”.
Lesson learnt- check used equipment very very carefully and take note of small changes in their modus operandi as this could have progressed with severe outcomes.
Used equipment- A40 mono blocks
- Latteman
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- Location: S. Yorkshire
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Used equipment- A40 mono blocks
Analogue Source -
Denon DP47f; AT-VM95SH- RigB 9
GL-59; ARB uni pivot; AT- Signet mc
Nva phono mm/mc
Doug Self balanced Pre amp
Akai 4000DS mk2 R2R
Digital Sources- Argon Pi4 v2; IfI iUSB 3.0, Ifi Neo idsd Dac;
Tidal / Radio Paradise
Amplification Nva 300va mono blocks
Speakers Lii Audio F-15 in Open Baffle; Ls6
Weiduka AC8.8- for digital sources
Mini BMU for analog sources
Denon DP47f; AT-VM95SH- RigB 9
GL-59; ARB uni pivot; AT- Signet mc
Nva phono mm/mc
Doug Self balanced Pre amp
Akai 4000DS mk2 R2R
Digital Sources- Argon Pi4 v2; IfI iUSB 3.0, Ifi Neo idsd Dac;
Tidal / Radio Paradise
Amplification Nva 300va mono blocks
Speakers Lii Audio F-15 in Open Baffle; Ls6
Weiduka AC8.8- for digital sources
Mini BMU for analog sources
- Latteman
- Posts: 1225
- Joined: Tue Aug 14, 2018 7:20 pm
- Location: S. Yorkshire
- Has thanked: 562 times
- Been thanked: 301 times
- Contact:
Re: Used equipment- A40 mono blocks
A fellow diy hifi enthusiast mentioned he had a couple of CRC psu boards going spare- What?!! I said, is a CRC psu- I’ll just leave this here
Analogue Source -
Denon DP47f; AT-VM95SH- RigB 9
GL-59; ARB uni pivot; AT- Signet mc
Nva phono mm/mc
Doug Self balanced Pre amp
Akai 4000DS mk2 R2R
Digital Sources- Argon Pi4 v2; IfI iUSB 3.0, Ifi Neo idsd Dac;
Tidal / Radio Paradise
Amplification Nva 300va mono blocks
Speakers Lii Audio F-15 in Open Baffle; Ls6
Weiduka AC8.8- for digital sources
Mini BMU for analog sources
Denon DP47f; AT-VM95SH- RigB 9
GL-59; ARB uni pivot; AT- Signet mc
Nva phono mm/mc
Doug Self balanced Pre amp
Akai 4000DS mk2 R2R
Digital Sources- Argon Pi4 v2; IfI iUSB 3.0, Ifi Neo idsd Dac;
Tidal / Radio Paradise
Amplification Nva 300va mono blocks
Speakers Lii Audio F-15 in Open Baffle; Ls6
Weiduka AC8.8- for digital sources
Mini BMU for analog sources