There are a few very minor cosmetic blemishes but the combo still makes a very pleasing visual impression as you can see in the pics.Bid with confidence on this combo. The controls and switches have been cleaned and lubed smooth and silent operation. A muting circuit eliminates turn on 'thumps'.This active crossover has been carefully tested and is in excellent working order. Crossover takes place with 12 dB/octave slopes, and compensation circuitry ensures high phase linearity at the selected crossover frequency.

The EC-100 features simplified crossover frequency selection and individual level controls for the divided channels. Tri-amplification and even more sophisticated installations are possible by implementing multiple EC-100's. One EC-100 can be inserted between a preamplifier and two stereo power amplifiers to provide bi amplification. This is a well built piece of equipment designed serious audio enthusiast.From Nakamichi's original product literature:The EC-100 Electronic Crossover provides a simple, and low cost method for multi amplification of loudspeakers. This is a great choice for bi-amp installations to power loudspeakers using multiple amplifiers for optimal clarity. Please check back later tonight for additional details and pics or click here for our testing and FAQ page!On Mar-22-21 at 10:19:25 PDT, seller added the following information:NakamichiEC-100 Crossover w PS-100 Power SupplyYou are bidding on a superb Nakamichi EC-100 crossover with the matching PS-100 power supply and filter. Nakamichi EC-100 Electronic Crossover Serious audiophiles have for many years chosen multi amplification of their loudspeaker systems (i.e., driving individual loudspeaker elements with separate power amplifiers) in order to further improve the quality of sound reproduction. Includes power supply/filter and DIN cable for connecting the two units. Excellent quality active crossover with very precise control over the slope and cutoff without added distortion to the signal chain.

Nakamichi ec 200