Model4 builds in the high performance and the high-quality sound transformer which used the permalloy core for MC cartridges.
In Model4, many phono cartridges from MC to MM can be used.
MC transformer is arranged at the nearness of the equalizer amplifier on the printed circuit board.
By this arrangement, there is no degradation of the sound quality by long signal transmission.
Three types of cartridge can be chosen with the switch on the front panel.
|Input Sensitivity||Input Impedance||The example of a Phono cartridge|
|MM||5mV||47Kohms||MM type Phono cartridge|
|MC High||0.5mV||40ohms||DENON DL-103, Audiotechnica AT-33, etc.|
|MC Low||0.2mV||10ohms||ortofon MC-10,MC-20,MC-30,SPU, etc.|
Model4 has a twice gain from the usual phono equalizer amplifier. Since there are few volume differences with digital equipment, such as CD and SACD, comfortable playback can be enjoyed.
The muting button which cuts the noise at the time of record exchange or cartridge exchange. Record exchange and cartridge exchange can be performed without reducing volume control.
Model4 has adopted CR type passive equalizer circuit suitable for a fine expression. Model4 play a delicate sound of an analog disk certainly.
The non-feedback amplification circuit which combined vacuum tube 12AX7 and a MOS-FET buffer is used. This non-feedback amplification circuit is essentially low-distortion. And it has a natural tone. Furthermore, you can enjoy the warm soft tone of a vacuum tube.
Exact reproduction is realized with the high precision RIAA equivalent
RIAA deviation : Less than 0.3dB (100Hz to 10kHz), less than 0.5dB(20Hz to 20kHz).
Model4 reproduces the very small signal of MC cartridge finely by a quality vacuum tube and quality parts, and composition which eliminated noise thoroughly. Even use by the MC Low position realized low noise and a high S/N ratio.
|Noise level in input||S/N ratio|
|No Compensation||IEC Compensation||No Compensation||IEC Compensation|
Low distortion was attained by improving the characteristic of an amplification
circuit, without using for a negative feedback.
0.2%(No Compensation), 0.1% (400Hz highpass filter) at 1kHz, 1V output.
Model4 uses low noise vacuum tube 12AX7LPS selected carefully. 12AX7LPS is the vacuum tube developed for low noise audio amplification circuits.
Please look at Model4 technical description about an internal photograph, a circuit diagram, and detailed description.
The price of Model4 is US$650 or 590Euro.
|Price||US$650 or 590Euro|
exclude tax and carriage
|Input||1 phono input (RCA)|
|Output||1 unbalanced consumer output(RCA)|
|Sensitivity & Impedance||
|RIAA equivalent error||Less than 0.3dB (100Hz to 10kHz).
Less than 0.5dB(20Hz to 20kHz).
|Distortion||0.2%(No Compensation), 0.1% (400Hz highpass filter) at 1kHz, 1V output.|
|An additional function||Muting|
|Maxim output voltage||20V|
|Dimensions||width 12"(30cm), depth 10"(26cm), height 4"(10cm)|
|AC Power Requirements||110-120Volts, 50-60Hz or
220-240Volts, 50-60Hz.(Choose at the order.)