21285
The 2290 was upgradeable to 32 seconds and Electro-Harmonix offered a 16-second delay and looping machine .
 Electro-Harmonix
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Electro-Harmonix