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Joined: Nov 2018
Posts: 300 Likes: 9
Hitchhiker
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Hitchhiker
Joined: Nov 2018
Posts: 300 Likes: 9 |
I had smoke come out of one of my DSP5ks, and the lower woofer stopped working. I read that the issue is most likely three transistors out of a possible 12. Is there a way to test the transistors without removing them from the board? Is the lower woofer controlled by the lower set of six transistors?
On another track, does anyone know the voltages available from the power supply, and also for the DSP board's analog outputs? I'm wondering if I could replace the amp board with a couple of ICEpower 80AM2 or 125ASX2s.
Jamie
Cave: Trinnov Altitude CI-8; Oppo 203 Vanity HD; 6xDSP5k, DSP5kC, D1500; Sony Z9D, PS5 Pro; Apple TV 4K
Living: Wiim Pro; Rega Planar 1+; 2xDSP5k
Master: Wiim Pro; 2xDSP3100
Kitchen: Bluesound Flex stereo pair / Amazon Echo Studio
Deck: Wiim Mini; Random Chinese Class D; Cambridge Soundworks Outdoor 52s; Polk Sub;
Garage: Wiim Pro; 2x5k
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Joined: May 2005
Posts: 839 Likes: 161
Paranoid android
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Paranoid android
Joined: May 2005
Posts: 839 Likes: 161 |
Hi Jamie,
You should be able to measure most of the transistors in circuit. If you have another working speaker, take measurements across transistors and compare...
The woofer will almost certainly be 'cooked' so you'll need to find another one (they do crop up from time to time on eBay).
The voltages available are +/- 45volts for the amplifier output stage and +/- 15v for the pre-stage.
Changing the amplifier is not really an option, since some of the electronic crossover is part of the circuit.
Drop me a PM if you want further information...
Cheers,
Steve
Main: 861v6 (LPS), 808v6, UHD722, DSP8000SE Anniversaries, DSP5200.2HC, DSP7200.2, SW1600, Sky Q, Cambridge Audio BD, Roon, M80
Office: 861v4 (LPS), 818v3, 800v4, HD621, M&K S150P, DSP5500HC, M&K MPS2810 sub x2
Son's system: 861v4, HD621, DSP6000.2, DSP5200HC, DSP33
Spare: MCD, 100 Series, 200 Series, 500 Series, F80s, C15s.
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Joined: Nov 2018
Posts: 300 Likes: 9
Hitchhiker
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Hitchhiker
Joined: Nov 2018
Posts: 300 Likes: 9 |
Are the two woofers (in a DSP5k) identically driven? (Are they identical drivers?) Or is one driven to lower frequencies?
Cave: Trinnov Altitude CI-8; Oppo 203 Vanity HD; 6xDSP5k, DSP5kC, D1500; Sony Z9D, PS5 Pro; Apple TV 4K
Living: Wiim Pro; Rega Planar 1+; 2xDSP5k
Master: Wiim Pro; 2xDSP3100
Kitchen: Bluesound Flex stereo pair / Amazon Echo Studio
Deck: Wiim Mini; Random Chinese Class D; Cambridge Soundworks Outdoor 52s; Polk Sub;
Garage: Wiim Pro; 2x5k
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Joined: Feb 2012
Posts: 209 Likes: 43
Hitchhiker
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Hitchhiker
Joined: Feb 2012
Posts: 209 Likes: 43 |
Hi Jamie,
They are identical drivers but have a different frequency band to cover and thus a different power amp to drive them.The lower one only covers up to around 200Hz or so.
Rgds
Stuart
Linn LP12, Ittok LV11, Arkiv, Linn Kairn as a phono stage, MPmax 221, DSP6000's, WiiM Pro streamer.
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Joined: Apr 2004
Posts: 12,733 Likes: 88
Don't Panic!
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Don't Panic!
Joined: Apr 2004
Posts: 12,733 Likes: 88 |
Yup, 5ks are a 2.5-way design, unlike the identically laid out M60s which are a true 3-way design.
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