TRIO ST-833X
¥ 105,000 (around 1966)
Commentary
Stereo components incorporating the latest electronic technology in the amplifier section.
Receiver section
It has an output of 28W to support a wide dynamic range.
The FM tuner section is equipped with a stereo monitor to identify FM multi-stereo.
We are also working to improve the quality by incorporating Trio's technologies, such as FM-multi noise reduction equipment.
Player part
The player part uses a tri-auto start system that enables smooth record performance with just one knob.
A MM type cartridge is used for the cartridge, and a hard pipe arm is used for the tone arm.
Speaker part
3-way 3-speaker configuration.
A 25 cm cone woofer is installed in the low range and a 16 cm cone squaker is installed in the middle range.
A horn type tweeter is installed in the high-frequency range.
The network is an LC type.
The enclosure is hermetically sealed.
Model Rating
| Type | Stereo component | |
| Receiver Section | ||
| Tuner Section | ||
| Receiving frequency | FM | 76 MHz to 90 MHz |
| AM | 535 kHz to 1,605 kHz | |
| Sensitivity | FM | 2.5 μ V/84MHz (30% modulation, S/N20dB) |
| AM | 20 μ V/1MHz (30% modulation, S/N10dB) | |
| Image ratio | FM | 30 dB or more |
| AM | 40 dB or more | |
| Frequency characteristic | 20 Hz ~ 20 kHz ± 1 dB (FM) | |
| Signal-to-noise ratio | FM | 60 dB or More (100% modulation, 1 mV input) |
| AM | 45 dB or More (30% Modulation, 1 mV Input) | |
| Amplifier Unit | ||
| Output | 28W (14W + 14W, Music Power, 1% distortion) | |
| Input sensitivity (1 kHz input required for 8W output) | MAG:2mV Aux:500mV |
|
| SN ratio (maximum volume adjustment, flat tone control) | MAG : 55 dB or more Aux : 65 dB or more |
|
| Residual noise | 3 mv (minimum volume adjustment) | |
| Entire Receiver Section | ||
| Accessory function | Earphone jack (L/R) New multi-stereo noise filter Tape rec connector |
|
| Used vacuum tubes, etc. | 6BM8x4 and others 14-ball 8-diode |
|
| Pwer | 100 VAC, 50Hz/60Hz | |
| Power consumption | 150W | |
| <Player Part> | ||
| Model Name | ST-833XP | |
| Cartridge Section | ||
| Cartridge | MM Type | |
| Needle tip | 0.7 mil diamond needle | |
| Frequency characteristic | 20 Hz to 20 kHz ± 2 dB | |
| Output voltage difference | Within ± 1 dB | |
| Needle pressure | 3-4g | |
| <Turntable portion> | ||
| Drive motor | 4-pole synchronous motor | |
| Turntable | 25 cm Aluminum Die Cast | |
| Number of revolutions | 16 2/3, 33 1/3, 45, 78 rpm | |
| Wow | Not more than 0.25% | |
| Tone Arm Section | ||
| Format | Static balanced type pipe arm | |
| Speaker Unit | ||
| Model Name | ST-833XS | |
| Method | 3-Way, 3-Speaker, Airtight System, Floor Type | |
| Units Used | For low band : 25 cm cone type For Medium Range : 16 cm cone type For High Frequency : Horn Type |
|
| Frequency characteristic | 45 Hz to 20 kHz | |
| Max Input | 15W | |
| Impedance | 8 Ω | |
| Crossover frequency | 1.25 kHz, 5 kHz | |
| <General> | ||
| External dimensions | Width 1,414x Height 780x Depth 400 mm | |
| Weight | 53.7kg | |