TU-8550, ELEKIT’s new tube preamp kit with a built-in phono equalizer, configured with tubes, 12AU7 and 12AX7, for all signal stages.

TU-8550 comes with tubes. *TU-8550N does not come with tubes, please note.

■A CR type RIAA equalizer circuit for straight-forward and smooth sound quality

■Quadral volume for the flat amp
diminishes residual noise upon low volume

■A CR type RIAA equalizer circuit for straight-forward and smooth sound quality

■Ample space for a larger coupling capacitor exchange
High gain is required for a preamp when the level of a sound source is low or when the input
sensivity of a power amp is low. On the other hand, high gain of a preamp brings about a
problem of residual noise at a small sound volume. VOLUME-GAIN locking system, where
the gain decreases as the sound volume is lowered down (approx. 1.4 times) and increases
when a volume is highered (approx. 7 times) puts this residual noise problem to rest and
diminishes the noise at low level even when the sound volume is low.

■Thorough elimination of hum noise

In the power sections, for rectification, first-recovery diodes are adopted for B-power, and a
slow-start by MOSFET is adopted for stabilized power supply. In addition, for A-power (heater
power), all tubes are DC-powered by a LDO regulator to eliminate hum noise thoroughly.

■REC-OUT built-in

Signals selected by the selector are output from REC-OUT which users may use when
connecting TU-8550 to a recording device or using the signals output from the equalizer
amp of TU-8550 in other amplifier device.

■2 lines of PRE-OUT
You can connect up to 2 power amps to TU-8550.

■Ample space for a larger coupling capacitor exchange
Maximum size of a capacitor : 20mm(diameter) x 57mm(length)