Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.
It checks today's price at every store, compares the alternatives and answers in about a minute.
This is a bare 6K4 tube preamp board that runs on DC 12V to 16V at 1A or more, with the power cord not included. A three-position toggle lets you adjust the gain or tone to taste, and the preamp stage is rated for a 5Hz to 500kHz frequency response. It suits DIY builders and tinkerers who want to add tube warmth in front of a home amp, and it takes phones, CD players, computers, TVs and MP3 players as sources. It is a board, not a finished enclosure, so expect to supply your own case, wiring and power supply.
Availability unknown
As an Amazon Associate, Deal.ai earns from qualifying purchases.
Also available at
Store links may earn us a commission.
Lowest price we've seen: $16.99 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.
This is a 6K4 tube preamplifier board sold as a DIY kit. It takes a low-level signal from a source such as a phone, CD player, computer, TV or MP3 player. It gives 5 times voltage amplification. A toggle switch has three adjustable levels for tuning the sound.
The preamp must be connected to a power amplifier or powered speakers. It cannot connect directly to passive speakers, headphones, gramophones or cars. It runs on 12V to 16V DC and needs at least 1A. The power supply is not included, and a DC12V 1.5A supply is recommended. The housing is made of ABS, PC and metal.