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25 Watt 300B Parallel Single-ended Monaural Power Amplifier
Features:
- 300B parallel single-ended stage for fixed-bias single pure class-A operation
- SOVTEK 2A3 for the transformer-coupled circuit driving PSVANE WE300B ended-tube optimally
- Output transformer and inter-stage transformer made by LUNDAHL in Sweden
- Two independent power choke transformers
- Designed throughout to reduce noise
Specifications:
| Product | 300B Parallel Single-ended Monaural Power Amplifier |
| Input impedance | 47k ohms |
| Gain | 27dB |
| Residual noise | 200µV or less: A-NET |
| Rated output | 25W (THD: 5%) |
| Frequency characteristics | 10Hz to 40kHz (+0,–3dB) |
| Output impedance | 4 ohms, 8 ohms |
| Power consumption | 160W（230VAC, 50 to 60Hz） |
| Input/Output terminals | Terminals made by FURUTECH CO.,LTD. |
| External dimensions (mm) | 270（W） x 245（H） x 433（D） |
| Weight | 20ｋｇ |
| Accessories | AC power cable |
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• Remote Control
• Large OLED display
• Blue Velvet ALPS motorized potentiometer
• Connectivity and extendibility through I/O Upgrade Modules
• Sophisticated protection and bias monitoring system
• No feedback design
• SRSG® implementation
• Gold plated Teflon RCA connectors
• Gold plated tube sockets
• 5mm aluminum face panel with luxury painting
• Five years guarantee
Ex-Dem Pass Labs INT-25 Integrated Amplifier
One unit ex-dem with remote and box
At Pass Labs we build Fet amplifiers with excessive output stages, huge heat sinks and massive power supplies. We use the highest quality components in simple linear topologies, assembled and tested with care and subtlety. They measure well, sound great, and are reliable. Twenty plus years of ongoing innovation have kept the X and XA amplifiers at the forefront of high-end audio.
The INT-25 embodies all this and less. A smaller stereo Class A amplifier at a lower price, it takes advantage of the lower power requirements to have simpler single-ended circuitry and fewer parts in the signal path. This also allows elimination of degeneration, “that other negative feedback” in all stages.
Download Owners Manual
Ex-Dem Pass Labs XP-22 Preamplifier
The new design uses double-shielded low noise toroidal transformers in external supply
The new design uses double-shielded low noise toroidal transformers in an external supply connected via aviation-grade circular connectors using silver over oxygen-free copper. The power supply is dual mono with two transformers with lower radiated and mechanical noise. Noise is the most prominent part of THD+N at low levels, so by lowering noise we get better resolution and dynamics.
The gain circuitry continues to use our favorite transistors from Toshiba but has a larger, higher biased, output stage like the Xs Preamp, and includes auto bias.
The larger output stage makes longer, and multiple cable runs easier to drive and gives us the advantage of simplifying our single-ended output circuitry while increasing performance.
The volume control is a single stage instead of two stages and has more range; it is quieter and more accurate. This is the same volume control as used in the XP-30.
Overall this makes for a quieter, more neutral, musical, and versatile control center for your system.
The XP-22 measures spectacularly well — but it really stands out sonically.
Ex-Dem Thivan Labs 211 Gold Swan Integrated Amplifier
- 1 unit ex-dem
- Please enquire for shipping cost if outside the UK
- The SWAN 211 Single-ended version’s sound quality is similar to that of the 211SE Anniversary version (the 2-blocked type). However, it is beautifully designed to be contained in one neat amplifier block. This one-block design, compared to the 211 SE Anniversary series, enables the Swan 211 to easily fit in narrow spaces.
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