Originally Posted by Yosh70
His receiver may be in 5 Channel stereo mode which is why his rear speakers aren't working. If he goes through his settings on his receiver there should be an option to turn 7 channel stereo mode on and then all of the speakers should play sound. If not then there may be another issue. The receiver has different surround mode options. Here are what the surround modes the receiver has:
Surround Modes: This receiver incorporates a wide variety of surround modes to bring you maximum enjoyment from your audio and video software. The surround modes include:
Dolby Digital: Dolby Digital is a 5.1 multi-channel digital surround format.
Dolby Digital EX: Dolby Digital EX is a 6.1 multi-channel digital surround format.
DTS Digital Surround: DTS Digital Surround is a 5.1 multi-channel digital surround sound format used for both commercial/theatrical and consumer grade applications.
DTS-ES Extended Surround: DTS-ES features two 6.1 multi-channel formats.
DTS-ES Discrete 6.1: DTS-ES Discrete 6.1-channel is a 6.1-channel discrete digital audio format adding a surround back channel to the DTS digital surround sound.
DTS-ES Matrix 6.1: DTS-ES Matrix 6.1-channel is a discrete 5.1 channel digital audio format inserting a surround back channel to the DTS surround sound through matrix encoding.
DTS 96/24: DTS 96/24 is a digital audio format enabling high sound quality playback in 5.1-channels with a sampling frequency of 96 kHz and 24 bit quantization of DVD-video.
Dolby Pro Logic II: Dolby Pro Logic II technology processes any high quality stereo (two-channel) movie and music audio into five playback channels of full-bandwidth surround sound. A matrix surround decoding technology, Dolby Pro Logic II detects the directional cues that occur naturally in stereo content and uses these elements to create a five-channel surround sound playback experience. You can choose from Cinema, Music, or Game formats. You can also choose Dolby Pro Logic (the earlier 4-channel mode).
Dolby Pro Logic IIx: Pro Logic IIx expands any existing stereo- or 5.1-channel audio for a 6.1- or 7.1- channel playback, creating a seamless, natural surround soundfield that immerses you in the entertainment experience. You can choose from the following Dolby Pro Logic IIx formats - Cinema, Music, or Game.
DTS Neo:6 Surround: DTS Neo:6 is a matrix decoding technology for achieving 6.1-channel surround playback with 2-channel sources. You can choose from two DTS Neo: 6 Surround formats - Neo: 6 Cinema and Neo: 6 Music.
Combined Surround Modes: The receiver features several combined modes using existing Dolby and DTS surround modes:
Dolby Digital + Dolby Pro Logic IIx Cinema
Dolby Digital + Dolby Pro Logic IIx Music
DTS + Neo:6
DTS + Dolby Pro Logic IIx Cinema
DTS + Dolby Pro Logic IIx Music
Denon Original Surround (DSP) Modes:
Rock Arena: this mode is for enjoying the atmosphere of a live concert in an arena
Jazz Club: this mode is for enjoying the atmosphere of a live concert in a jazz club
Mono Movie: this mode is for playing monaural movie sources with surround sound
Video Game: this mode is suited for achieving surround sound with video games
Matrix: this mode lets you add a sense of expansion to stereo music sources
Virtual: this mode is for enjoying surround effects using only the front speakers or headphones
5CH/7CH Stereo: this mode is for enjoying stereo sound from all speakers