I'm using Sure 600x1 amp based on the TAS5630 to power a sub. My power supply is a cheap SMPS 48v 8.3 A. If I understand correctly, I can't put larger caps on the SMPS output filter because it causes instability. The amplifier has 7 x 470uF caps, the bulk power supply input decoupling caps I assume. If I change these to the largest caps that will fit, 2200uF Ultra-low ESR Nichicons, can it still cause problems with the power supply?
It may trip over current projection at power on - at least.
Whats the intend to change these caps, more bass? Nope. 🙂
Whats the intend to change these caps, more bass? Nope. 🙂
Using WinISD, the speaker shouldn't exceed xmax in the box I built. It should handle full rated power of 800W RMS. I ran a burst tone at 42HZ and heard a POP from the aluminum cone that sounded like it was bottoming out. The amp only puts out about 260watts at 1% and 300 at 10%, and the power supply is rated 400watts. I didn't have the volume more than 60% turned up so it seems like I shouldn't bottom out the speaker unless it was clipping really bad. Is it possible to test for a voltage drop on the power supply while running a burst tone, or can cause a short?
My thoughts are that to power supply is underrated and cant provide enough instantaneous current for the transient peaks of the amplifier. Plus it seams like 7 x470uF is not enough for a 600 watt amp. I've seem 3116d2 amps with 3x 3300uF caps that only push 200 watts. Thats 3,290uF for 600watts, but 9,900 for the 200 watt amp.
On power up an SMPS runs for a short while without checking for a short, this is to allow capacitors to charge up. It then goes into normal running mode checking for a short or too much current.
If you put too many uF on the output the SMPS will think there is a short and shut down.
Using an SMPS you should be able to get away with maybe 1000uf on output of it.
The SMPS is probably running around 100KHZ so the capacitor doesn't get much time to discharge so you dont need massive capacitance.
If you put too many uF on the output the SMPS will think there is a short and shut down.
Using an SMPS you should be able to get away with maybe 1000uf on output of it.
The SMPS is probably running around 100KHZ so the capacitor doesn't get much time to discharge so you dont need massive capacitance.
You could try increasing them incrementally like 680uf or 1000uf.
But you would have to test the amp after each change that the SMPS was ok with it.
You could solder tack them on to the current capacitors just to test.
This is mainly done for the lower ESR of these caps, not for their capacitance.
I noticed the spec sheet for TAS5630 recommends using a minimum of 4x 1000uF low ESR caps. I think I'll go ahead and switch them, but I'm pretty sure I need to cough out the $75 for the se-600 48v meanwell power supply. Also, I should probably get the dual voice coil 4 ohm version of this speaker in a 10" to better match with the amp. It's for my computer anyway. I'll save the 15" for when I built my HT speakers and pair it with a 1000w plate amp. Underpowering it so much is just asking for trouble.
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