Before revision: Nevertheless, tube preamplifiers are still sold in niche markets, such as with home hi-fi enthusiasts, audio engineers , and music producers (who use tube preamplifiers in studio recordings to "warm up" microphone signals) and electric guitarists, electric bassists and Hammond organ players, of whom a minority continue to use tube preamps, tube power amps and tube effects units.
After revision: Nevertheless tube preamplifiers are still sold in niche markets, such as with home hi-fi enthusiasts, audio engineers , and music producers (who use tube preamplifiers in studio recordings to "warm up" microphone signals) and electric guitarists, electric bassists and Hammond organ players, of whom a minority continue to use tube preamps, tube power amps and tube effects units.