|Item Weight||1.9 ounces|
|Product Dimensions||4.2 x 2.7 x 7 inches|
|Item model number||TDA7297 15W+15W|
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DROK Amplify Module Audio Component Amplifier,TDA7297 (TDA7297 15W+15W)
|Price:||$12.28 & FREE Shipping on orders over $25. Details|
- 2.0 dual output channel of 15W+15W; can be connected to 4 to 8 ohms/ 10 to 50W speakers
- Blue LED indicator which lights on when amplifier power on
- It is suitable for AC and DC circuit usage; with CBB capacitance of 2200UF/25V
- Tiny appearance but with high volume; it has knob for you to screw the potentiometer
- It has the fan for cooling and is soldered already so that you can use it directly
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Parameters: Power Supply: AC/DC 9-18V, Recommend 12V 2A Output Impedance:4-8 ohms efficiency: up to 90% Output Power: 15W+15W Chip: TDA7297 Dual-Channel Amplifier Chip please follow the picture to connect the Power Supply and Speaker. Package Includes: 1x Mini Amplifier
Top customer reviews
Like most of the other DROK amps, this is a bare bones amplifier. What it does have is a strong clean output. It has no case and it doesn't come with a power supply. I tested it with a 12v 5A power supply brick that I had driving a pair of JBL Loft 40 speakers. I cranked it up while wearing Etymotic ER20-SMC earplugs because it was so loud that I was concerned about hearing damage when sitting near the speakers. I played several selections that I normally use for audio testing and I was quite impressed. Even music with deep base did not seem to phase this little guy. I also listened from a further distance without earplugs just to be sure the sound wasn't being altered. The base was clean and strong, the highs were a little exaggerated but I think this is more a function of the speakers. With the volume control at max and no music playing, there was nearly zero hiss.
It has a large heat sink (50mmx55mm), something often lacking in these types of amps. It became quite warm after a few minutes of playing music at high volume, but it wasn't so hot that I couldn't touch it and it never shutdown from overheating. I tried to get a temperature reading using a non-contact thermometer and it was showing about 115F, but I think it was hotter. The board design is quite simple as most of the work is done by the ST Microelectronics 7377 integrated circuit. The line level input connector is a standard 1/8" stereo connector, the power and speaker connections use CMM5-2 PCB screw down terminals. The screw terminals are typical for these types of bare amps and are a little weak (so don't over tighten, or solder on some wires). It has a blue LED that indicates power, there are no other indicators. The only control is for volume, and it was static free when adjusted.
For the more technically inclined... The TDA7377 is actually a class A/B four channel amp designed for car stereo head units. The DROK design uses it in double bridge mode to make it a higher power two channel amp, it isn't possible to bridge it further for a subwoofer. The chip has output short circuit and overload/overheat protection. The outputs do not share a common ground since they are bridged. The DROK design uses a diode in series with the positive power so it is protected if you accidentally reverse the power polarity. The chip specs a supply voltage of 8-18V, however due to the series diode you will need at least 9V to operate it. I wouldn't go with less than a 5A power supply unless you plan on keeping the volume down. The specs say it has a THD of 0.3 at 10W in bridged mode, and max output of 35W/channel into a 4ohm load at 14.4V. If you want to extend functionality, pin 10 of the chip can be used to indicate faults such as clipping and overload. The IC in volume is around $3, but when you add in the other components and manufacturing, the DROK TDA7377 is quite a bargain for the sound quality.
For those that don't mind dealing with a bare amp, it beats the pants off most of the cheap amps that come with a case (ie. Lapai, etc).
An old receiver broke on me and so I shopped around for a way to power 1 bookshelf speaker for the garage. Glad I found this and gave it a try! Works great bridged for a mono feed, powered by a 9v 1000mAh wall wart power supply. I mounted it straight to the top of the speaker with small wood screws and nylon spacers.. looks awesome.
I was surprised the DROK® Micro TDA7377 runs cool enough to touch after pushing a 100w speaker for an hour, impressive! There were others that said it gets hot, well not in any way that is unsafe.
I'd give it 6 stars for the price.
Other than the case (I used this one: uxcell® Plastic Enclosure Project Case Junction Box 160 x 120 x 68mm), everything I needed I already had - some speakers left over from an old 5.1 amplifier that I replaced a long time ago, a switch from my junkbox, a 12v 5a power supply from a dead printer. and a male-to-male headphone patch cable that I have no memory of buying - it's quite possible that two cables in the rats nest of my junkbox reproduced themselves and this is the baby.
I ordered another (I had two more of the speakers) as soon as I had this one going. Here's some project photos.
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