Hello. My no-name amplifier burn out by some reason, but it was not quite good, as well was made with so-so transistors ( TIP41C ), so I wish to get a bit better one and with a higher output.
I stumbled upon these 2 which seems good choices, at least by looking at similar amplifiers. I aim highest quality possible for like 40-50 bucks.
Please help me decide ( if u have something else on mind please poste it as well - all suggestions is welcome )
So :
https://www.ebay.com/itm/3256821122...-8e35-e65a121c59e3|iid:1|vlpname:vlp_homepage
or
https://www.ebay.com/itm/1561016332...-8e35-e65a121c59e3|iid:1|vlpname:vlp_homepage
Thank You in advance guys.
I stumbled upon these 2 which seems good choices, at least by looking at similar amplifiers. I aim highest quality possible for like 40-50 bucks.
Please help me decide ( if u have something else on mind please poste it as well - all suggestions is welcome )
So :
https://www.ebay.com/itm/3256821122...-8e35-e65a121c59e3|iid:1|vlpname:vlp_homepage
or
https://www.ebay.com/itm/1561016332...-8e35-e65a121c59e3|iid:1|vlpname:vlp_homepage
Thank You in advance guys.
I'd choose the first one over the second for a couple of reasons. First, the seller provides a schematic and second the UPC2581 driver chip used on the second one is rather hard to find the specs of. So I reckon fault-finding's going to be easier with the first one.
I'd be interested to know how anyone can tell you the sound quality of an amp from looking at its listing on eBay.😛 If you look carefully, the 2nd listing doesn't actually tell you what the output devices are going to be, could be bipolars or MOSFETs, anyone's guess.
Ah then probably better to ask in your opening post 'Has anyone listened to either or both of these two eBay amps and is willing to share something about their SQ?'
What makes you think these kits are "good choices" when you need an amplifier that actually works?
Well.. the end pair transistors and the driver ones participating in quite a lot of circuits which state that they are extremally low distortions for these 100W which provides. .. about that price those looked quite well build, but since I have no real opinion ( I've never heard them in real ) that's why I am asking.
Why do you not want to buy a commercial amplifier?
These eBay kits - nobody can tell what you will actually receive should you choose to buy any.
When buying amps from eBay at knock-down prices its probably unwise to assume that the output transistors will be the genuine Toshiba devices they headline in the listing.
Maybe post a picture of the internals of your old amp. What kind of amp PCB you can use depends on the voltages you have to offer. DC past the rectifier, smothed with capacitors. Something like +0- 30 Volts
If you want a very good sounding amp, there are some chip amps out there. They smoke these old designs any time of day, they are only revived because of the Chinese believe in great names and audio legends. With such low cost amps, these highly refined A/B chips are the best you can get.
Lm3886 and TDA7294 are the ones to look for.
If you want a very good sounding amp, there are some chip amps out there. They smoke these old designs any time of day, they are only revived because of the Chinese believe in great names and audio legends. With such low cost amps, these highly refined A/B chips are the best you can get.
Lm3886 and TDA7294 are the ones to look for.
Well the old amp is also chinese, but even lower grade. A small short on the out, and some resistors and transistors joined Valhalla..
The goodie is that there is a good equalizer, quite good looking box with a lot of inputs, Bluetooth, and a good toroidal transformer, and I was planning to remove the amplifier, replace it with one of above.
The goodie is that there is a good equalizer, quite good looking box with a lot of inputs, Bluetooth, and a good toroidal transformer, and I was planning to remove the amplifier, replace it with one of above.
The LM and TDA don't care about shorts.
You may get one of these kits: https://de.aliexpress.com/item/1005002871613103.html
This is a datasheet implementation of the LM3886. It comes without a (fake) LM3886. You have to get two LM3886TF chips from an honest distributor. This means "not from China". They are less than 10€ a piece. Check the parts that come with the kit, not all may be best quality. The valueable part is the PCB. Nothing fancy, just like here: https://www.ti.com/lit/ds/symlink/lm3886.pdf?ts=1714910012783
You do not need any loudspeaker protection with a REAL LM3886TF. It is internaly protected. The Chinese fake LM3886 do not have this protection and blow on the first short, beside from sounding ugly.
You may get one of these kits: https://de.aliexpress.com/item/1005002871613103.html
This is a datasheet implementation of the LM3886. It comes without a (fake) LM3886. You have to get two LM3886TF chips from an honest distributor. This means "not from China". They are less than 10€ a piece. Check the parts that come with the kit, not all may be best quality. The valueable part is the PCB. Nothing fancy, just like here: https://www.ti.com/lit/ds/symlink/lm3886.pdf?ts=1714910012783
You do not need any loudspeaker protection with a REAL LM3886TF. It is internaly protected. The Chinese fake LM3886 do not have this protection and blow on the first short, beside from sounding ugly.
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