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Technics SU-V2 keeps cutting out

I have a technics SU-V2 amp wired to 2 reli retro powerful bose speakers and the sound just cuts out for no reason (display stays on) ever so often im a bit of a novice and suspect the amp may not be powerful enough for the speakers but it sounds really great until it cuts out really need some help cheers

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Re: Technics SU-V2 keeps cutting out

An amp will cut out if the output protection circuit kicks in. This circuit compares output power against the preset level. Each channel has it's own, independent protector. There are calculations that can be done, but for a novice the rule of thumb is to "never use a speaker with a power rating less than the amp AND a lower impedance than stated". Typically using a 4 ohm load on a 8 ohm system is inviting disaster. Even if the system does not become a smoke generator, you might notice that though "louder", the sound quality is deteriorated. Many "audiophiles" often hook up some combinations of speakers to have "surround" without really understanding that the collective impedance actually changes (generally lowers).

Posted on Jan 21, 2008

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What's the second amp going to do in your scenario? Something other than the normal stereo channels; something multichannel (if your PC supports it); or just more speakers supported for the PC to feed?

An RCA Y-connector pair would share the stereo output of the PC with multiple Line Level destinations.

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Su-v55a technics amp cuts off when volume up to 2. 1

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When i turn up the amp the 'current drive' cuts

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check the main capacitors in the power supply, check the internal fuses, and change the wall plug fuse - check all the large capacitors for closed/short circuit or cracked solder joints, resolder anything suspicious looking. the fuse could be **nearly** blown, and bend apart when it gets warm, change it to be sure... hope this helps.

Jan 25, 2010 | Technics Amplifiers & Preamps

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Lost left stereo channel from amp. All speakers / wiring ok Technics SU-V6 amplifier. Wondering which component is most likely problem so I can cannibalise another amp.

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Check too for broken or burnt parts too!

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The most common cause of this is defective coupling caps inside. These allow some DC voltage to pass through to the final amp stage. This DDC voltage is detected by the protection circuit and the unit shuts down. This unit will require service. Please note that this should be a simple and inexpensive repair. The cost should be less than $10 for parts.


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