MINI Audio tube preamplifier Pre-Amp Class A preamp Valve 12AU7 Tube Headphone Amplifier | Электроника

Характеристики

Using this method must be carefully read: !!!!       After good line and headphones. To boot. Then probably about heat engine 15 seconds. Headphone which can speak! In addition.Remember. Do not for a long time (more than five minutes) load this bile amplifier or easily damaged machine. (The so-called no-load. That is not connected to any headphone or RCA outputs do not access post-stage. Direct long driving machine) ,Unlike tube amplifier transistor. If the load time. Amplification tubes and pipes are damaged.   So if you unplug the headphones, turn the small amplifier. Otherwise, please make sure the headset plugged into the small amplifiers. !!!       Improvement:       1, custom absoluteGold plated RCA input nest, gold-plated headphone output interfaces seatProvide excellent exposure, to ensure smooth transmission.   2, better panel, 3MM thick fireproof material.   3,Power upgrade to 24V / 1.5A (solid mark).Absolutely enough, the original general 24V1A, in addition, to increase the output protection function, so that when turned on, the relay may be of great current impact sound, has now been resolved, while increasing the relay, allowing you to plug in your headphones directly advance . without the need to require heat engine before inserting. (If you do not heat the machine before you plug in your headphones when power is applied. will be of great current impact sound, will damage the headset.)   4, the regulator replace all imported ST regulator, non-domestic bargains.   In addition. The price includes all the accessories. Power, host, tubes are homogeneous, (bring your own cable), hand ready to use.   Some common parameters:   Operating voltage: DC24V / 1.5~2A     Input sensitivity: 50mV   Output Impedance: 16 ~ 600Ohm   Gain: 32dB   Frequency Response: 20Hz-20KHz   Machine operating rated power: 15W (heat big reason is because of this class amplifier .A little useful work about 10-20%, the other for being converted to heat up if you need to work long hours, plus a recommendation. small fan)   Actual output power (also called RMS). After a solid test, probably 450mw / per channel. (Figuratively, headphone output power is only 20-30mw), so for general low-impedance headphones can cope Click (generally 20-60 ohm, ear), but for you some big impedance or high-power headphones. Most of the headphone, speaker unit with large diameter, power is also great, and then the phone they can not do anything. So, With this small amplifier, Guarantee can push properly properly, let alone a hundred European standard headphones.   Package contains a list: 1pcs pre amp 1pcs 12AU7 tubes. 1pcs 6.35 to 3.5 Adapter Hand ready to use. DC 24V/2A power adapter   Note: Class A tube preamp because the heat is very large, do not use for a long time!