Comment 2 for bug 1302090

Audio and Speakers
Internal High-Definition 5.1 Performance Audio with Dolby Home Theater v4 Software (Standard)
2.1 Speaker configuration with Subwoofer
Audio Powered by Klipsch®
7.1 Digital Audio out using HDMI out connection

(2x) Audio Out 1/8" Ports (One compatible with inline mic headset)
(1x) Line In Microphone 1/8" Port (retaskable for 5.1 analog audio output)

how many internal speakers ?

only stereo speakers at node 0x14

Node 0x14 [Pin Complex] wcaps 0x40058f: Stereo Amp-In Amp-Out
  Control: name="Speaker Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Control: name="Speaker Phantom Jack", index=0, device=0
  Amp-In caps: N/A
  Amp-In vals: [0x00 0x00]
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals: [0x00 0x00]
  Pincap 0x0001003c: IN OUT HP EAPD Detect
  EAPD 0x2: EAPD
  Pin Default 0x90170110: [Fixed] Speaker at Int N/A
    Conn = Analog, Color = Unknown
    DefAssociation = 0x1, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Power states: D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
  Connection: 3
     0x0c 0x0d 0x0e*

https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1299322