- Latest News
- Product Catalogue
- Where to Buy
- Tech Support
- Contact Us
- Register Warranty
As UK distributors for the brands we represent, our main focus is to give you all the information you need to help assist with your purchase. Once you have the information you need, we want to make the purchase process as simple as possible. So we give you up-to three options on how to buy our products.
Our preferred option is for you to visit a nearby store and buy what you need locally. Our authorised stockists are some of the finest specialist hi-fi retailers in the country, and they're equipped to give you the best after-sales and set-up advice possible - all in person. To find your local retailer, either click the 'Buy In-Store' button on your product page for exactly the right recommendation, or head to our comprehensive Where To Buy tool.
If you want the added convenience of only having to pop-in to store when you know the product you want has arrived, you can use our Click & Collect-style checkout process. With Buy Now, Collect Locally, your purchase takes place online and the product is then delivered direct to your local supporting retailer; ready for you to collect when you're ready. Click here to find out more about Buy Now, Collect Locally.
For smaller items, you can also have the ultimate convenience of purchasing directly through our website. The checkout process is entirely secure, so you can trust your information will be safe - and your desired product will arrive with you as quickly as possible.
The Triode 25 was born out of the huge success of the long-standing Triode 20 amplifier, and released as part of the 25th anniversary celebrations of Unison Research's formation. It's been developed over an extended period to ensure it is a worthy successor to the Triode 20's name.
Like its predecessor, the Triode 25 is a push-pull amplifier that utilizes EL34 tubes in the output stage. The push-pull circuit includes a final stage with two power tubes intended for the amplification of the audio signal, and is then followed by a symmetrical output transformer stage that reconstructs the signal into a high-quality linear wave.
Using a push-pull structure in this amplifier design allows for numerous benefits, including higher-output power compared to single-ended designs, improved efficiency and no static polarization of the output transformer for greater performance in the output section. However, for this to work well it is essential that all the individual amplification stages are carefully designed and constructed to prevent the formation of dangerous and compromising odd-order harmonic distortion. This is true for the two semi-output amplifiers, and even more important in the output transformer.
The Triode 25 can operate in two modes: triode and pentode. The latter is capable of delivering a maximum power output of over 45 watts per channel (6Ω load) with minimal harmonic distortion across the entire audio band.
With the use of an Apple lightning to USB connector (not included) you can plug your iPhone/iPod/iPad directly into the Triode 25's DAC and play your hi-res music files straight from your device.
The addition of a USB input modernises the Triode 25 and increases its appeal to the growing world of computer audiophiles, who use their laptop or computer as a high-quality audio source for their hi-fi. The USB input is 32-bit/384kHz and DSD 128 compliant to support the latest standards in studio quality audio.
The Triode 25 is available with a premium cherry wood front panel (Black Wood front panel is available to Special Order).
|Output Stage:||Push-Pull, Ultralinear, Class-AB|
|Output Power (per-channel):||45W in Pentode mode
25W in Triode mode (approx.)
|Input Impedance:||47kΩ / 50pF|
|Negative Feedback:||Switchable, 5dB or 1.8dB|
|Valves:||2 x ECC83 (12AX7)
1 x ECC82 (12AU7)
4 x EL34 (6CA7)
|Power Consumption:||300W max.|
|Fuses:||T3.15A (220 - 250V)|
|Dimensions:||30 x 20 x 45cm|
Many of our products are firm favourites with the global hi-fi press, and this one is no exception. Check out the coveted awards and/or reviews this great product has received. To find out more click the icons below.