text: """Group multiple equalizers together to act on all simultaneously."""
  from .equalizer import EqualizerBase
  
  
  class EqualizerGroup(EqualizerBase):
      """
      Group multiple equalizers together to act on all simultaneously.
      """
  
      def __init__(self, equalizers):
          """
          :param equalizers: List of EqualizerBase implementations
          """
          self._equalizers = equalizers
  
      @property
      def equalizers(self):
          """
          :returns: List of equalizers
          """
          return self._equalizers
  
      def get_presets_names(self):
          """
          :returns: List of preset names shared by all equalizers.
          """
          presets_names = self._equalizers[0].get_presets_names()
  
          for equalizer in self._equalizers[1:]:
              eq_presets_names = equalizer.get_presets_names()
              presets_names = [p for p in presets_names if p in eq_presets_names]
  
          return presets_names
  
      def set(self, *args):
          """
          Set equalizer values by preset name or list of band values for all equalizers.
  
          :param: Name of the preset to set or list of 7 band values to set
          """
          for equalizer in self._equalizers:
              equalizer.set(*args)
  
      def save(self, name=None):
          """
          Create a new or overwrite existing preset for all equalizers.
  
          :param name: If empty, current preset will be saved, if provided name exist, that preset will overwrite existing
              one, otherwise a new preset is created with that name. In either case band values used will be ones
              currently set on a speaker e.g. via set() method.
          """
          for equalizer in self._equalizers:
              equalizer.save(name)
  
      def delete(self, name):
          """
          Delete preset from all equalizers.
  
          :param name: Name of a preset to delete
          """
          for equalizer in self._equalizers:
              equalizer.delete(name)
  