Description

Description 【Condition】N ew *This product requires assembly with solder, etc. Product Specifications [ Circuit configuration, vacuum tubes used ]. Flat amplifier (line amplifier): 2 x 12AX7, 1 x 12AU7 single-ended input/output Phono equalizer amplifier section: 2× 12AX7, 1× 12AU7 CR type RIAA equalizer amplifier A power supply: DC lighting (all bulbs) B power supply: MOSFET type slow-start constant voltage power supply [Phono equalizer amplifier section ] [Maximum output voltage] 20Vrms(1kHz) [Gain (1kHz)] 29dB [Residual noise] 50μV(IHF-A) [RIAA deviation] within ±0.5dB (20Hz to 20kHz) [Input resistance] 47kΩ (MM) [Flat amplifier section] Unbalanced input/output, continuously variable gain type [Maximum output voltage] 20Vrms (1kHz) [Maximum gain] Approx. 17dB (approx. 7 times) [Frequency Response] 5Hz to 200kHz (-3dB) [Residual noise] 15μV (IHF-A) [PHONO IN : RCA jacks, for MM cartridge, 47kΩ LINE IN : 4 lines LINE 1, 2, 3 : RCA jacks LINE 4 : 3.5mm stereo phone jacks (front) PRE OUT : 2 RCA jacks (parallel output) REC OUT : 1 RCA jack, [Power supply voltage] AC 100V 50/60Hz IEC standard 3P inlet type [Rated power consumption] 23W [Dimensions] W 352 × H 66 × D 298 mm (including protruding parts) [Weight] Approx. 3.9 kg (when completed) Product Overview The TU-8550N is an all-tube preamplifier kit with a built-in phono equalizer amplifier. Tubes are not included. Please prepare them separately. Use 4 x 12AX7 and 2 x 12AU7 tubes. Please use tubes with low microphonic noise. TU-8550 is also available with vacuum tubes. Phono equalizer amp uses CR type RIAA equalizer circuit, which has a reputation for its straightforward and smooth sound quality. The flat amp uses a quadruple volume control. When the input sensitivity of the power amplifier is low or the sound source level is low, high gain is required for the preamplifier. However, a disadvantage of high gain in the preamplifier is that residual noise at low volume when the volume is turned down can be a concern. Therefore, this model uses a quadruple volume control system, which lowers the gain of the amplifier when the volume is lowered (by a factor of 1.4) and increases the gain when the volume is raised (by a factor of 7), thus reducing noise at low volumes. Thorough elimination of hum noise In the power supply section, the B power supply uses a fast-recovery diode for rectification and a MOSFET for slow-start stabilization. The A power supply (heater power supply) also uses an LDO regulator for full DC lighting to thoroughly eliminate hum noise. REC-OUT is equipped The signal selected by the selector is output from the REC-OUT. Use this function when connecting to recording equipment or when you want to use the equalizer amp output from this unit with other amplifiers. Two outputs (PRE-OUT) Connection can be made to two power amplifiers. Large coupling capacitor can be replaced with a large coupling capacitor. Space is provided for mounting a capacitor up to 20 mm in diameter and 57 mm in length. Shipping information: 【Shipping cost】Standard shipping(FedEX or Japan Post) 【Estimate Time of Arrival】 The package will arrive 7-30 days after shipment 【Handling Time】 1-10days. International Buyers - Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying. If the cancellation is due to buyers, we will charge a Payonner fee. If there is a remote charge for your address, we will charge you for additional shipping. Than you for your understanding.