Bose Soundlink Mini II - how do I output high-quality sound?

I have a Bose Soundlink Mini that works well - I can pair it with Kubuntu (14.10) and set it as an audio playback device for videos in Phonon. Sounds great. :)

Just purchased a Soundlink Mini II and I've now run into trouble. The speaker does not seem to be using the same high-quality audio mode via bluetooth. It sounds pretty bad. Here's an extract from

$ pacmd list-sinks

index 1 is the new Soundlink Mini II

index 2 is my old Soundlink Mini

index: 1
    name: <bluez_sink.08_DF_1F_43_F9_CD>
    driver: <module-bluetooth-device.c>
    flags: HARDWARE HW_VOLUME_CTRL LATENCY 
    state: SUSPENDED
    suspend cause: IDLE 
    priority: 9530
    volume: 0: 100%
            balance 0.00
    base volume: 100%
    volume steps: 16
    muted: no
    current latency: 0.00 ms
    max request: 0 KiB
    max rewind: 0 KiB
    monitor source: 1
    sample spec: s16le 1ch 8000Hz
    channel map: mono
                 Mono
    used by: 0
    linked by: 0
    fixed latency: 128.00 ms
    card: 1 <bluez_card.08_DF_1F_43_F9_CD>
    module: 25
    properties:
            bluetooth.protocol = "hsp"
            device.intended_roles = "phone"
            device.description = "Bose Mini II SoundLink"
            device.string = "08:DF:1F:43:F9:CD"
            device.api = "bluez"
            device.class = "sound"
            device.bus = "bluetooth"
            device.form_factor = "speaker"
            bluez.path = "/org/bluez/502/hci0/dev_08_DF_1F_43_F9_CD"
            bluez.class = "0x240414"
            bluez.name = "Bose Mini II SoundLink"
            device.icon_name = "audio-speakers-bluetooth"
    ports:
            speaker-output: Speaker (priority 0, latency offset 0 usec, available: unknown)
                    properties:

    active port: <speaker-output>
index: 2
    name: <bluez_sink.00_0C_8A_B7_79_F2>
    driver: <module-bluetooth-device.c>
    flags: HARDWARE DECIBEL_VOLUME LATENCY 
    state: IDLE
    suspend cause: 
    priority: 9030
    volume: 0:  80% 1:  80%
            0: -5.81 dB 1: -5.81 dB
            balance 0.00
    base volume: 100%
                 0.00 dB
    volume steps: 65537
    muted: no
    current latency: 65.06 ms
    max request: 3 KiB
    max rewind: 0 KiB
    monitor source: 3
    sample spec: s16le 2ch 44100Hz
    channel map: front-left,front-right
                 Stereo
    used by: 0
    linked by: 0
    fixed latency: 45.32 ms
    card: 2 <bluez_card.00_0C_8A_B7_79_F2>
    module: 27
    properties:
            bluetooth.protocol = "a2dp"
            device.description = "Bose Mini SoundLink"
            device.string = "00:0C:8A:B7:79:F2"
            device.api = "bluez"
            device.class = "sound"
            device.bus = "bluetooth"
            device.form_factor = "hifi"
            bluez.path = "/org/bluez/502/hci0/dev_00_0C_8A_B7_79_F2"
            bluez.class = "0x240428"
            bluez.name = "Bose Mini SoundLink"
            device.icon_name = "audio-card-bluetooth"
    ports:
            hifi-output: HiFi (priority 0, latency offset 0 usec, available: yes)
                    properties:

    active port: <hifi-output>

As you can see the sample spec for the new speaker is only mono @ 8kHz. :(

Does this mean I need to set pulseaudio to use A2DP for this device? How do I do this? I'm happy to edit config files but I'm lost as to where to start.

Thanks.