I'm using another pair of these for a gain stage without EQ with some low gain Meissner amps. While not exactly endless, the possibilities are certainly numerous for putting these to good use. The item "Pr General Electric UPX-003B Vintage Tube Phono Preamp" is in sale since Friday, June 19, 2020. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "widerangesound" and is located in Essex, Maryland.This item can be shipped to United States, Canada, United Kingdom, Denmark, Finland, Australia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Germany, Austria, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Malaysia, Brazil, Chile, Colombia, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, French guiana, Iceland, Cambodia, Liechtenstein, Sri lanka, Luxembourg, Macao, Maldives, Peru, Pakistan, Paraguay, Viet nam, Uruguay.