I had this idea to mount a ta2020+ps in the middle of two Ikea bowls to make a ceiling hanging speaker. Unfortunately it created a little too much heat, so I didn't think it would be very safe.
My new idea is to create a enclosure, mount that to the ceiling, and hang the speaker from the enclosure.
Any ideas on a nice enclosure? Also I have a PS from Arje Helder. It seems quite big... Aren't there any smaller alternatives?
My new idea is to create a enclosure, mount that to the ceiling, and hang the speaker from the enclosure.
Any ideas on a nice enclosure? Also I have a PS from Arje Helder. It seems quite big... Aren't there any smaller alternatives?
Head over to 41Hz Audio - Main page and check out the amp3. V-bro on the forum over there made one that fits inside a stripped 9V battery.
I bought this one to power a TA2021 amp, but 5A is too much more than enough. Perhaps it'd be just right to power two TA2024s.
AC 100V-240V Converter Adapter DC 12V 5A Power Supply | eBay
AC 100V-240V Converter Adapter DC 12V 5A Power Supply | eBay
This will be more than enough. What may happen though is the following. The adapter is grounded. I had it that when connected to my PC - also grounded to the same earth - a ground loop occured (switching noise on it). By removing the earth tap from the adapter by twisting it with a pair of pliers, this problem can be solved, might the same happen to you.
vac
vac
TA2020 = TA2024 but in a better casing. So if heat is a problem TA2024 won't help much. At least a heatsink can be attached to TA2020 (hence the slightly higher output wattage).
Indeed PE can be a problem when a switching power supply is used. Those are always connected to PE for safety and EMI reasons as they can put out a lot of RF/HF garbage. This EMI garbage will be led to PE so it can't go on a trip via the mains cabling. If you mount the amp in a metal enclosure with both amp PCB and power supply on the same metal chassis it will cause audio-GND to be connected to PE. This is a ground loop. To make thing slightly worse most manufacturers have the mounting holes connect to audio GND (why not isolated ?) so mounting an amp PCB by metal mounting studs and metal M3 bolts will mean that the amps audio-GND will be connected to the chassis automatically. We don't want to connect audio GND to PE anyway so the solution is to separate audio GND and PE.
This can, for example, be done by mounting the switching power supply on isolated mounting studs. Please leave PE connected for safety. Removing PE will also cause the EMI components to hang in the air thus the switcher will pollute the mains voltage and so the amps voltage too. It is very unclever and unsafe to remove PE from switchers !!! Either do things right or don't do them at all.
Indeed PE can be a problem when a switching power supply is used. Those are always connected to PE for safety and EMI reasons as they can put out a lot of RF/HF garbage. This EMI garbage will be led to PE so it can't go on a trip via the mains cabling. If you mount the amp in a metal enclosure with both amp PCB and power supply on the same metal chassis it will cause audio-GND to be connected to PE. This is a ground loop. To make thing slightly worse most manufacturers have the mounting holes connect to audio GND (why not isolated ?) so mounting an amp PCB by metal mounting studs and metal M3 bolts will mean that the amps audio-GND will be connected to the chassis automatically. We don't want to connect audio GND to PE anyway so the solution is to separate audio GND and PE.
This can, for example, be done by mounting the switching power supply on isolated mounting studs. Please leave PE connected for safety. Removing PE will also cause the EMI components to hang in the air thus the switcher will pollute the mains voltage and so the amps voltage too. It is very unclever and unsafe to remove PE from switchers !!! Either do things right or don't do them at all.
Last edited:
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.