I got two bookshelf speakers for $20 US, figured I would try to build an amplifier to test them, but having trouble finding a good 2-channel chip. Any recommendations?
The Speakers are VB-15 Bookshelf Speaker | Klipsch
The Speakers are VB-15 Bookshelf Speaker | Klipsch
How about LM3886? I think a lot of DIYers can recommend it, and here's some quality implementations by Tom:
Solid State Power Amplifiers & Power Supplies | Neurochrome :: Audio
Solid State Power Amplifiers & Power Supplies | Neurochrome :: Audio
There are many possibilities. LM3886 is one attractive possibility though it is actually a single channel chip.
It depends a lot on your level of ambition. Without power supply and pre-amplifier, a well sounding stereo amplifier can be made from 5 EUR (6$) and upwards. Is it only for testing of these speakers? Have you any idea about how much you like to spend? How much output power would you like?
You like a ready-made board, a kit or you are going to design it yourself?
It depends a lot on your level of ambition. Without power supply and pre-amplifier, a well sounding stereo amplifier can be made from 5 EUR (6$) and upwards. Is it only for testing of these speakers? Have you any idea about how much you like to spend? How much output power would you like?
You like a ready-made board, a kit or you are going to design it yourself?
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Like Faux said, the LM3886 is single channel.
A kit or something similar would be best. My budget is about $50, though it can be extended. Mostly using them for music . Between 25 and 75w would work.
A kit or something similar would be best. My budget is about $50, though it can be extended. Mostly using them for music . Between 25 and 75w would work.
these are the options for what you want :
So what if lm3886 is not 2 channel chip?
Use 2of them .... 😀
What is your 50$ budget suppose to cover?
So what if lm3886 is not 2 channel chip?
Use 2of them .... 😀
What is your 50$ budget suppose to cover?
TDA8566 does a great job as classAB amp, provided its decoupled extremely well. See here : Possibly the most frugal high-end sounding amp? - Page 3
...2 channle class d amp with PSU....
68 $ amp with a brick psu 24/4A fine and nice implementation of a TI Class D chip.
Feixiang FX AUDIO FX502SPRO HIFI Audio Digital High Power Amplifier Home Mini Professional Amp TPA3250+NE5532 24V 4A 2 Colors-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
or europe
FX-AUDIO FX502SPRO Amplificateur Class D TPA3250 2x 80W 4 Ohm Black
modification
TPA3250 somebody is listening?
chris
68 $ amp with a brick psu 24/4A fine and nice implementation of a TI Class D chip.
Feixiang FX AUDIO FX502SPRO HIFI Audio Digital High Power Amplifier Home Mini Professional Amp TPA3250+NE5532 24V 4A 2 Colors-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
or europe
FX-AUDIO FX502SPRO Amplificateur Class D TPA3250 2x 80W 4 Ohm Black
modification
TPA3250 somebody is listening?
chris
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Are there any chip/pcb's that are rated for single channel 4 ohm, but with two outputs? I'm reading that you can connect two 8 ohm speakers to one 4 ohm chip?
Indeed you can, and if the chip is 2ohm capable you can connect 4 such speakers. TDA8566 is 2ohm capable.
Was able to get a hold of 2 more of the same speaker, so that would work great! Do you know of any pcb's that would have 4 outputs for that chip? Not big into designing my own board...
2-Channel Chip Amp
Like Anti said, either the LM4766T / LM4780T, or a lower-power version: The LM4765T. This chip is 30W/ch. I've built several 2-Channel chip-amp boards around the '4765T and they sound great.
My desktop system is an FX Audio DAC-X6 feeding the LM4765T thru a 100KΩ ALPS RK16 stereo pot. Speakers are modified Minimus-7s (extra insulation to tighten up the bass, and revised crossover networks for a 12dB/Octave roll-off).
The LM4765T is configured for 15W/ch into 8Ω. Power is supplied by a 12VDC to +/-20VDC PWM Switcher. Controller IC is an SG3525 clocked at 66kHz (33kHz switching frequency). Transformer are two FT-114-77 toroids stacked. Primary is 4T+4T, and secondary is 11T+11T.
The Amp picks up no detectable noise from the switcher, which is less than five inches.
Like Anti said, either the LM4766T / LM4780T, or a lower-power version: The LM4765T. This chip is 30W/ch. I've built several 2-Channel chip-amp boards around the '4765T and they sound great.
My desktop system is an FX Audio DAC-X6 feeding the LM4765T thru a 100KΩ ALPS RK16 stereo pot. Speakers are modified Minimus-7s (extra insulation to tighten up the bass, and revised crossover networks for a 12dB/Octave roll-off).
The LM4765T is configured for 15W/ch into 8Ω. Power is supplied by a 12VDC to +/-20VDC PWM Switcher. Controller IC is an SG3525 clocked at 66kHz (33kHz switching frequency). Transformer are two FT-114-77 toroids stacked. Primary is 4T+4T, and secondary is 11T+11T.
The Amp picks up no detectable noise from the switcher, which is less than five inches.
LM4766 sound quality compared to Class-D boards?
Hi. (I realize it's an old thread, but the only one I found for this).
Trying my hand at actively crossing over a speaker with a cone midbass and a planar tweeter (which is very revealing of detail).
I have my (analog) crossovers already, and a stereo 100W Class-D for the midbass. I'm looking at a variety of lower-powered Class-D amps and also the popular LM4766 Class-AB "chip amp" for driving these sensitive tweeters.
Anyone here ever compared the LM4766 stereo amp against such class-D boards, such as the TA2024, which I also have (or the TP3110, or TDA 7297) ?
I'd appreciate any comments on sound quality, H.F. performance, noise, etc.
Thanks in advance for your kind opinions.
-Charles
Hi. (I realize it's an old thread, but the only one I found for this).
Trying my hand at actively crossing over a speaker with a cone midbass and a planar tweeter (which is very revealing of detail).
I have my (analog) crossovers already, and a stereo 100W Class-D for the midbass. I'm looking at a variety of lower-powered Class-D amps and also the popular LM4766 Class-AB "chip amp" for driving these sensitive tweeters.
Anyone here ever compared the LM4766 stereo amp against such class-D boards, such as the TA2024, which I also have (or the TP3110, or TDA 7297) ?
I'd appreciate any comments on sound quality, H.F. performance, noise, etc.
Thanks in advance for your kind opinions.
-Charles
I have one of these and really like it. You can turn off the sub output. This amp and a power supply will take you slightly over $50, unless you have a computer power supply brick, which will work great.
https://www.parts-express.com/TPS31...-x-50W-100W-with-Filter-and-Volume-Co-320-635
https://www.parts-express.com/TPS31...-x-50W-100W-with-Filter-and-Volume-Co-320-635