Description
Product descriptionA stereo power amplifier designed for high output to not only faithfully reproduce the original music, but also to reproduce the sound of the music itself.*The final stage uses a parallel push-pull method using two high-output transistors with uniform characteristics for each channel. This method reduces the current flowing through each transistor by half, so it has the advantages of being able to select an operating point with good linearity, continuously obtaining stable high output, and obtaining low distortion over a wide band. Masu.*The circuit configuration is a further refined all-stage direct-connected pure complementary OCL circuit, the pre-drive stage is a 2-stage class A amplification with active load, and the drive stage is a parallel push-pull method with a 3-stage Darlington connection. It has become.The differential amplifier section uses newly developed dual transistors with uniform operating points and temperature characteristics to increase the stability of the midpoint potential, and at the same time improves direct current balance by combining a constant current circuit and a current mirror circuit. Its more stable.Furthermore, we actively use high-quality parts such as ultra-low noise transistors, low-leakage capacitors with low loss and leakage current, fuse resistors, non-flammable resistors, and varistors, and we have carefully tested them not only for their physical characteristics but also for rigorous listening tests. Sound quality is determined through testing.*The power supply section employs a two-winding toroidal transformer with independent left and right windings, and a large-capacity silicon rectifier and large-capacity electrolytic capacitor constitute a powerful power supply section.Moreover, ±2 power is supplied independently to the pre-drive and drive stages, and a stabilized power supply circuit is provided in the pre-drive stage that employs a constant current circuit.*For protection of the output transistor, a current limiter circuit based on safe operating area (ASO) detection and a temperature detection circuit using a posister are installed, and for speaker protection, a DC detection circuit combined with a relay is used. . When these protection features are active, the indicators on the front panel will turn red.Regarding inrush current when the power is turned on, which is a problem with large output amplifiers, a dedicated relay and prevention circuit have been installed to increase safety.*Equipped with a large power meter with excellent followability that allows you to check the output level and left/right balance.This power meter uses a logarithmic compression circuit to display the effective value, and is suitable for pulse-like signals and signals at low output. is also following.This indication range can be switched to 3 levels: x1, x1/10, and x1/100, and it is possible to read from 0.001W to 110W and from -34dB to +3dB.*The driver stage, output stage, and power supply section are each completely separated into separate blocks to prevent mutual interference and influence between each block stage, and to connect each block at the shortest possible distance to eliminate shielded wires as much as possible. I am.* Output In order to effectively dissipate the heat generated by the transistor, a large chimney type heat sink is used that utilizes the chimney effect.This heat sinker employs four convection radiators with an envelope volume of 1,200 c.c., making full use of the chimney effect, which has a type of forced air cooling effect by absorbing cold air from the bottom.?Main specificationsModel stereo power amplifierEffective output (both channel operation)20Hz~20kHz: 110W+110W(4?, THD 0.05%)110W+110W(8?, THD 0.03%)1kHz: 110W+110W(4?, THD 0.03%)110W+110W (8?, THD 0.01%)Output bandwidth (IHF) 5Hz to 50kHz (8?, THD 0.05%)Total harmonic distortionAt 1W output: 0.03% or less (4?) 0.02% or less (8?)At rated output: 0.05% or less (4?) 0.03% or less (8?)Cross-modulation distortion rate 0.03% or less (70Hz:7kHz=4:1, SMPTE)Frequency characteristics (at 1W output) 5Hz to 100kHz +0 -1dBChannel separation 75dB or more (1kHz)SN ratio 115dB or more (IHF, A network, short circuit)Input sensitivity/impedance 1000mV/50k?(1kHz)Power consumption 245W (rated) 910W (maximum)Maximum external dimensions Width 460x Height 176x Depth 415mmWeight 18.3kg?The condition of the product is that there are no noticeable scratches or stains.Confirmed to be energized.For remote delivery areas, additional fees will be charged. Import duties,taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility. These charges are normally collected by the delivering freight(shipping) company or when you pick the item up. -do not confuse them for additional shipping charges. We do not mark merchandise values below value or mark items as gifts. -US and International government regulations prohibit such behavior.
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