Two-channel power amplifier switch 2 pairs of speaker switcher / power amplifier switcher / tube protection 2 in 2 out

Buying:

Type A: Without tube protection;
Type B: With tube amplifier no-load protection component.

Two-channel power amplifier speaker switcher, two-to-two two-way selection. Two power amplifiers and two pairs of speakers can be connected.

All two-to-two models are ground wire synchronous switching!

You can choose to have tube protection function. The principle of tube protection is: when the power amplifier is about to switch to another power amplifier, connect the fake load to the tube through another switch (this is the middle switch), and then leave. . This machine chooses 8 ohm load to better match the output impedance and reduce the reflection of the output cattle primary to the power bile duct.

In fact, the so-called protection can be achieved by connecting a resistor of several hundred ohms to 1K/3W, which can be directly connected in parallel to the output end of the amplifier, which saves the cost of switches and radiators and saves effort. Some enthusiasts and even businesses do just that. However, the impedance mismatch is still harmful to the components.

Not all tube amplifiers cannot be unloaded. Please consult the manufacturer of the product for specific situations. It is safer to add a dummy load if you are not sure.

There are two product models
The following are different configuration prices and delivery dates (excluding the day of payment)
1. No-amplifier no-load protection, the delivery period is 2-3 days
2. With amplifier no-load protection, the delivery period is 2-3 days

Talk about the main points of use:
1. For models with amplifier protection, switchers after 16 years, the amplifier can be connected to any group of amplifier input columns. Don't choose the model with amplifier protection if both of them are stone amplifiers. If both of them are amplifiers, please pay special attention: the two amplifiers cannot be turned on at the same time. When the amplifier is connected, the amplifier protection switch must be switched in the same direction as the amplifier selector switch! It has a protective effect, following the principles of “protect first, then boot” and “protect first then leave”.

2. Turn on both the ball and the stone. When switching to the stone machine, please turn down the volume of the amplifier to reduce the false load heating.

3. For models with tube amplifier protection, if two stone machines are connected, the dummy load can be disconnected if the middle three-gear switch is placed in the middle position. The power amplifier can be switched at will and will not be connected to a fake load.

4. Dummy load radiator cannot withstand high power, please do not connect high-power stone machine with dummy load, so as not to forget to turn down the volume and burn the machine.

Adopt large-scale terminal, all lines are completely cut off, safety structure, silver alloy high-current switch, single crystal copper silver-plated wire, pure copper gold-plated terminal. Before the machine is shipped, the actual connection equipment is checked, just in case! The dummy load of the protected model has been bombarded with full power for more than 1 hour of 10W small A power amplifier to ensure the stability and reliability of the dummy load aluminum shell resistance.

The shell used by this machine is a pure aluminum wire-drawing shell, and the front and rear panels are laser marked for use and wiring.

Please refer to the picture for the internal materials of the machine
Size: 220*70*220mm (width * height * depth, including protruding parts)
Weight: Type A 1.7kg, Type B 1.9kg
Color: black brushed aluminum oxide