Found for review here is an ancient two-channel car amplifier
"Farenheit"
from the company "Power Acoustic", model Q2-320,
which means that the model has 2-channel
and the maximum output power for both channels is 320 watts.
The amplifier provides a highly effective audio amplification
of any content connected to this amplifier.
There are several connection configurations with additional equalizers, audio processors
in a common such customizable audio system.
The amplifier is equipped with short-circuit protection in the load and thermal protection.
"Farenheit Q2-320" is the first car device that is on my channel.
Well, all the technical characteristics and dimensions of this amplifier
are presented in this table, please see.
The amplifier is made in a sheet metal housing.
The upper border is made of transparent lilac
plastic, on which is fastened with 4 screws,
such a thick plate that performs a purely decorative role.
To install the amplifier in the car
in the elements of the radiator there are positions for fixing the screws.
The amplifier is old enough, even rust appears, it was used last time about 10 years ago.
On the back side are all the terminals.
This is for connecting acoustics. Do not look, that there are 2 channels here.
It is possible to use 4 speakers.
And 3 terminals for power connection: -12 Volts, Remote and +12 Volts.
To use the amplifier,
the connectors Remote and +12 Volts are short-circuited.
And there is also a fuse, like this.
To output sound, you need acoustics with a resistance of 2 to 8 ohms - this is very important.
In my case, this is a 3-band "Pioneer" speaker
with 4 Ohms resistance, model TS-A2011, maximum power 350 watts.
The amplifier is equipped with two types of inputs:
a high-level input
and a low-level input. These are 2 channels. There is such
a 6-pin connector.
And here also 2 channels are connected: -, + right channel, -, + left channel,
this middle one is not used, and here the signal ground is the lower middle one.
And here are also 2 LEDs - green and red.
Green lights up when power is applied, red indicates protection.
There are several controls on the front panel of the device. For example, here is
the "X-OVER" switch, which allows depending on the connected acoustics,
for example, if we connect a subwoofer,
we switch the switch to the middle position "LP",
and only the low-frequency spectrum of the signal is output to acoustics.
With the help of this crossover regulator "LPF" you can adjust
the transmission frequency from 40 to 300 Hertz.
That is, we add a few mid-range frequencies, we hear musical instruments.
Now we cut them.
And the entire range is the switch in the "FR" position.
If it is necessary to select the middle frequency, then switch the "X-OVER"
to the "HP" position,
and also by means of the regulator it is possible to cut
off the entire frequency, which is lower from 40 to 300 Hertz.
Well in this case below 40 Hertz
or below 300 Hertz.
Well, that is, it's a high pass filter - a midrange filter and a low pass filter.
And accordingly there are regulators.
If it is necessary to add a low-frequency component, there is such a bass boost switch.
Here it is off.
On.
And adjust the level of the input signal.
Minimum.
In this amplifier, several options for connecting speakers are possible.
The 1st mode is the main mode
when the left and right speaker systems are connected as follows:
+ right, - right, - left, + left.
In this case, the resistance of the acoustic speakers should be from 2 to 4 ohms each.
To connect a subwoofer, it is clear that in mono mode,
it is necessary that its resistance be 4 Ohms.
In my case it's
"Alphard XE", 150 watts.
Well, it's clear that you first set the switches on the front panel
to the desired position
to output only the low-frequency signal, adjust the crossover frequency,
and connect as follows:
"-" right goes to "-" speaker and "+" left goes to " + "dynamics.
In this case, the subwoofer.
And the third option is when you have a subwoofer connected in mono mode
and 2 broadband channels are connected in stereo mode,
while the subwoofer should be 8 ohms.
We connect through the inductor.
Well, and 2 channels of speakers 4 ... 8 Ohm the resistance
must be connected through the separation capacitors, and, depending on the cutoff frequency, the requirements
for the inductance and capacitor ratings are listed in this table.
By the way, this is an instruction in pdf format.
I will leave a link to it in the description.
Overload of power supply unit - current is not enough.
I have several times assembled and dismantled the body of this device,
and I have not much impression of him.
Everything looks like something collective-farm, clumsy.
And even this plate is turned out like a samopal. So I took off this whole body kit.
With the help of screws such secured. Here, just such plastic lies.
Well, such a scheme. The amplifier is assembled according to the traditional scheme.
The final cascade requires about 25 volts.
And here such an inverter is built on a KIA494AP controller.
The heat sensor here stands on the radiator, more precisely on the body.
With the help of an insulating gasket, the terminal
4 transistors are fixed to the housing: here 2, here 2 - the left and right channels.
As the final ones, such transistors are used.
With some elements of the scheme can be found in the photos
that I will post in their posts.
Okay. In any case, such an amplifier is automotive. I repeat this "Farenheit Q2-320",
which is well, by chance, got to the review. I decided to introduce you to him.
Well, on this I say goodbye to you. Good luck to all! I'll see you soon. Till!
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