4 best drok amps

Product description

DROK Battery Tester Digital Voltage Ampere Power Energy Multimeter



Technical Parameters:

Model: WLS-PVA200

Current measuring range: 200A

Current resolution: 0.2A

Power supply range: DC5～90V

Voltage measuring range: DC0～300V

Voltage resolution: 0.1V

Capacity measuring range: 0～999AH

Power measuring range: 0～999KW

Electric energy measuring range: 0～999KWH

Measurement error:±1%

Refreshing speed: 0.5S/time

Installing size: 76.0mm * 39.5mm

Diameter of transformer:Φ20mm

Working current: backlight on: 10MA;backlight off：4MA

 

Package includes:

1 X LCD Digital Cullen Meter 

• Multifunctional Meter: DROK multimeter panel is available to measure percentage and AH of remaining capacity, DC positive and negative bidirectional current, DC voltage, DC positive and negative power, DC positive and negative bidirectional accumulated electric energy. Voltage measurement range is DC 0-300V, current measurement range is 0-200A.
• Hall Sensor & Easy Mount: the voltage amperage meter is coming with a Hall transformer to for isolated measurement, reliable and safe; accepting two-wire system connection and three-wire system connection, could be powered DC5~90V, easy and simple to wire this meter up.
• Display: backlight can be controlled to be ON or OFF as user’s need; Equipped with full angle of view LCD screen, users could see the display clearly whenever at night and day, indoor or outside, even under the sunshine.
• Alarming Function: it will alarm and flash to draw your attention when the real voltage is higher or lower than preset alarming voltage and real current is higher than preset current; It will also alarm and flash to remind you to charge for your device when the remaining capacity of battery is low.
• Wide Applications: Can be used as dc amp meter, digital volt meter, power meter, battery capacity monitor. Suitable for all kinds of batteries, such as Lead-acid batteries, Lithium Polymer batteries, lithium iron phosphate batteries and etc. With function of storing date when power down, using this meter, no need to worry that your electric data will be lost.

User questions & answers

Question:	what is the actual size of the product? lxwxh .. nothing listed here
Answer:	Inside measurements for the cut out are 72mm wide, 39mm tall and 25mm deep. The outer face plate is 7mm wider and 3mm taller, not much difference. I made a matting skirt out of thin black plastic since it's very difficult to cut a perfectly sized rectangle in the wall.
Question:	How to use menu options no user manual is included
Answer:	Dear customer， We have pdf manual on product deatils page. It can be found on the "Technical Specification" from this page. Or please click on this link directly. https://m.media-amazon.com/images/I/B1ubSSVdpyS.pdf Best regards, DROK
Question:	specs say it is a 200A meter, yet some say its only goes up to 100A, can anyone confirm this can measure up to 200A
Answer:	im sitting looking right at one 6months installed ... it regularly measures 155 amps of 12volt charge and up to 199amps discharge .... those are my system limits witb a 5000w inverter several golf cart batteries and two 100amp chargers
Question:	How long i as the cable for sensor and what is max wire size that will fit in sensor
Answer:	The sensor cable is about 8 inches long but i cut my cable and extended it to about 10 ft. I testes it up to 15ft and it worked fine. You could possibly go longer. Just use a good quality multi wire cable, or make your own. About 18AWG probably OK. I recall the hole as 20mm, roughly 3/4 inch diameter. No problem for RV battery cable. Remember you can run more than one wire through the hole, That way you can still use battery terminal as the tie point for the various wires that may already be connected there. The sensor will read the Sum of currents, that is for example, if you have charging from a solar system at say 5A, and a discharge load to lighting at say 3A, your meter will show 2A charging. Hope this helps

Product features

Buttons

With 2 buttons to be easily operated.

Bi-direction Current

With the capability to measure current in forward and reverse direction.

Backlight Control

Backlight can be manually turned on/off via the button.

Can be clearly viewed in any light conditions.

Product description

Parameter:

Input Voltage: DC 9-18V, recommend 12v

Output Power: can be connected to 4-8 ohm speakers，max output 35W+35W (18V 4ohm)

Chip: TD7377pro2

Frequency range: 20Hz~20kHz, ±1dB

Input method: 3.5mm audio input/3P expansion input terminal

PCB size: 58.67*55.12mm

Overall Size (including heat sink): 90.56*55.12*26.65mm



Protection:

Power supply input reverse connection protection;

Short circuit protection;

Over current protection;

Over temperature protection



Note:

Please connect the PCB board in accordance with the wiring diagram. The power supply cannot be connected to the channel terminal, or the IC will burn.



Package Included:

1x Automotive Amplifier Board

1x 30cm 3-pin Shielding Cable

• DROK amplifier board input voltage range is DC 9-18v; output power is 30W+30W; can be connected to 4-8 ohm speakers.
• High Performance: Adopts high-grade pure black immersion gold circuit board, KEMET speaker capacitor, double NICHICON large-capacity filter capacitor per channel, high-quality monolithic filter capacitor and metal film resistor. These provide a high performance for this audio amplifier board.
• Specially-customized Terminals: The automotive amplifier module adopts specially-customized pure black copper terminals, gold-plated audio access terminals and 3P pure black terminals.
• Adjusting Knob: This dual-channel amplify module is comes with a adjustable knob, the volume can be adjusted conveniently.
• Safe Protection: The stereo amp board is designed with input reverse connection protection, short-circuit protection, over-current protection, over-heat protection, which can protect your device perfectly and extend its service life.

User questions & answers

Question:	On the "B Version" can you hook up two different inputs at the same time
Answer:	Yes. I have the aux cable input coming from a phone (playing music) and the screw terminal input coming from a microcontroller (playing sounds using an Arduino library) and both sounds can play at the same time.
Question:	Can I conect this amp. Direct to car radio
Answer:	The inputs on this amp are line (Aux) level inputs, so if you have an aftermarket car stereo, you can come out of the line level outputs (RCA jacks) into this amp. If you have a factory stereo you should NOT hookup to the speaker wires. The speaker outputs will overload the amp inputs and cause distortion. The inputs on the amp have a common ground, and this would damage most factory stereo outputs.
Question:	Is the 3P pure black audio input terminal the same as the 3.5mm input
Answer:	From the limited documentation that comes with it, yes.
Question:	can i use it on 16 ohm guitar speaker
Answer:	The data sheet for the TDA7377 doesn't say so, but in stereo bridge mode, it should not work with the design parameters. HOWEVER. Do be aware that the limit of power output is voltage on this design; even at 18V, 16 ohm speakers will probably reduce it to closer to 5W or 6W per channel. I would suggest a design that's based on 8 to 16 ohm speakers,. not a 2 to 4 ohm speaker design. Now if you had four of those speakers you could wire in parallel, it would probably work fine (since that would then end up 4 ohms effective.)

Product features

Dual Audio Input Methods

• 3.5mm gold-plated audio input socket
• 3P pure black audio input terminal

Immersion Gold PCB

• Well laid out
• High performance
• Stable and reliable

High Grade Components

• KEMET audio capacitor
• Nichicon capacitor
• Monolithic filter capacitor
• Metal film resistor
• No distortion
• Little noise

Multiple Protections

• Input reverse connection protection
• Short-circuit protection
• Over-current protection
• Over-heat protection

Product description

DROK 30W+30W Car Audio Stereo Amplifier Board



Parameter:

Working voltage: DC 9-18v, recommend 12V

Max output power:35W*2 (18V 4 Ohm), can be connected to 4-8 ohm speakers.

Frequency range: 20Hz~2kHz, ±1dB

Input method: 3.5mm audio cable input/3P extension cable input

Dimension: 101x64x45mm



Protection:

Power supply input reverse connection protection;

Short-circuit protection;

Over-current protection;

Over-temperature protection.



Package Included:

1x Power Amplifier Module with Case

1x 30cm 3-pin Shielding Cable

• PARAMETER --- working voltage DC 9-18V, recommend 12V; max output power 35W*2 (18V 4Ω), can be applied to 4-8Ω speakers.
• APPLICATION --- can be applied to automotive audio stereo system DIY; can be applied to test bench; can be applied to bookshelf speakers, etc.
• PROPERTY --- class AB, 2.0 dual channel.
• INPUT METHOD --- 3.5mm audio cable input/3P extension cable input.
• PROTECTION --- input reverse connection protection; short-circuit protection; over-current protection; over-temperature protection.

User questions & answers

Question:	Will this mix both inputs
Answer:	Hello there, No. It is a stereo in and stereo out.
Question:	Is it plug and play or you have to use a soldering iron for the parts
Answer:	This is plug and play. No soldering required. Assembly is required if you want build the acrylic enclosure (parts provided with the amplifier board).
Question:	Is this amp bridgeable
Answer:	No
Question:	What is the frequency range
Answer:	Hi, the frequency range of the amplifier module is 20Hz--20kHz, ±1dB.

Product features

Dual Audio Input Methods

• 3.5mm gold-plated audio input socket
• 3P pure black audio input terminal

Immersion Gold PCB

• Well laid out
• High performance
• Stable and reliable

High Grade Components

• KEMET audio capacitor
• Nichicon capacitor
• Monolithic filter capacitor
• Metal film resistor
• No distortion
• Little noise

Multiple Protections

• Input reverse connection protection
• Short-circuit protection
• Over-current protection
• Over-heat protection

Product description

DROK 30W+30W Dual Channel 2.0 Car Audio Stereo Amplifier Module



Parameter：

Working voltage: DC 9-18V, recommend 12V

Output power: 35W*2 max (18V 4Ω), can be connected to 4-8Ω speaker

Input method: 3.5mm audio cable input

Dimension: 71x64x72mm



Protection:

Power supply input reverse connection protection;

Short-circuit protection;

Over-current protection;

Over-temperature protection



Package Included:

1x Stereo Amp Module

• PARAMETER --- working voltage DC 9-18V, recommend 12V; max output power 35W*2 (18V 4Ω), can be applied to 4-8Ω speakers.
• APPLICATION --- for bookshelf speaker; for test bench; for car auto audio stereo sound system DIY
• PROPERTY --- class AB, 2.0 dual channel.
• INPUT METHOD --- 3.5mm audio cable input.
• SAFE PROTECTION --- power supply input reverse connection protection; short-circuit protection; over-current protection; over-temperature protection.

User questions & answers

Question:	RCA inputs
Answer:	NO...3.5 mm input. Get skw cables..good for the $$$$
Question:	What kind of power needs are required? How many amps
Answer:	5 amp or more current rating. I reccoment 12v digital power supply. Alitove makes good stuff.
Question:	What screws are used to secure the plastic case to the columns
Answer:	those should be included in the kit.
Question:	What chip is in this
Answer:	TDA 7377. Class AB with set gain. Recommend 12v switching power supply because 8-9 volt 5 amp power transformers are hard to come by. Higher voltage the chip gets hot. Recommend changing out the input capacitors ( the little white squares next to the chip.) but thats a challenge. My speakers don't like tubes and this little amp is just fine for my apartment. 30 watts is for 4 ohms speakers...mine are 6 so I get okay power. Recommend SKW 3.5mm cables for input.