In case anyone is wondering how the box (and Kaffeine) sees the tuners:
[ 80.604773] em28xx 1-3.1:1.0: New device HCW quadHD-A @ 480 Mbps (2040:846d, interface 0, class 0)
[ 80.604775] em28xx 1-3.1:1.0: DVB interface 0 found: bulk
[ 80.662007] em28xx 1-3.1:1.0: chip ID is em28174
[ 80.688605] em28xx 1-3.3:1.0: New device HCW quadHD-A @ 480 Mbps (2040:846d, interface 0, class 0)
[ 80.688610] em28xx 1-3.3:1.0: DVB interface 0 found: bulk
[ 80.745952] em28xx 1-3.3:1.0: chip ID is em28174
[ 81.886730] em28xx 1-3.1:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x14798274
[ 81.886734] em28xx 1-3.1:1.0: EEPROM info:
[ 81.886737] em28xx 1-3.1:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 81.911956] em28xx 1-3.1:1.0: AC97 audio (5 sample rates)
[ 81.911960] em28xx 1-3.1:1.0: 300mA max power
[ 81.911964] em28xx 1-3.1:1.0: Table at offset 0x27, strings=0x126a, 0x1688, 0x087e
[ 81.969636] em28xx 1-3.1:1.0: Identified as Hauppauge USB QuadHD ATSC (card=105)
[ 81.969642] em28xx 1-3.1:1.0: dvb set to bulk mode.
[ 81.981720] em28xx 1-3.3:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x14798274
[ 81.981724] em28xx 1-3.3:1.0: EEPROM info:
[ 81.981727] em28xx 1-3.3:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 82.006055] em28xx 1-3.3:1.0: AC97 audio (5 sample rates)
[ 82.006059] em28xx 1-3.3:1.0: 300mA max power
[ 82.006063] em28xx 1-3.3:1.0: Table at offset 0x27, strings=0x126a, 0x1688, 0x087e
[ 82.029842] em28xx 1-3.1:1.0: chip ID is em28174
[ 82.065594] em28xx 1-3.3:1.0: Identified as Hauppauge USB QuadHD ATSC (card=105)
[ 82.065600] em28xx 1-3.3:1.0: dvb set to bulk mode.
[ 82.125720] em28xx 1-3.3:1.0: chip ID is em28174
[ 83.262332] em28xx 1-3.1:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x14798274
[ 83.262336] em28xx 1-3.1:1.0: EEPROM info:
[ 83.262339] em28xx 1-3.1:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 83.287766] em28xx 1-3.1:1.0: AC97 audio (5 sample rates)
[ 83.287771] em28xx 1-3.1:1.0: 300mA max power
[ 83.287775] em28xx 1-3.1:1.0: Table at offset 0x27, strings=0x126a, 0x1688, 0x087e
[ 83.345445] em28xx 1-3.1:1.0: Identified as Hauppauge USB QuadHD ATSC (card=105)
[ 83.345451] em28xx 1-3.1:1.0: dvb ts2 set to bulk mode.
[ 83.356996] em28xx 1-3.3:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x14798274
[ 83.356997] em28xx 1-3.3:1.0: EEPROM info:
[ 83.356998] em28xx 1-3.3:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 83.380119] em28xx 1-3.3:1.0: AC97 audio (5 sample rates)
[ 83.380119] em28xx 1-3.3:1.0: 300mA max power
[ 83.380121] em28xx 1-3.3:1.0: Table at offset 0x27, strings=0x126a, 0x1688, 0x087e
[ 83.437214] em28xx 1-3.3:1.0: Identified as Hauppauge USB QuadHD ATSC (card=105)
[ 83.437215] em28xx 1-3.3:1.0: dvb ts2 set to bulk mode.
[ 83.636398] usbcore: registered new interface driver em28xx
[ 83.638031] em28xx 1-3.1:1.0: Binding DVB extension
[ 83.642098] dvbdev: DVB: registering new adapter (1-3.1:1.0)
[ 83.642100] em28xx 1-3.1:1.0: DVB: registering adapter 0 frontend 0 (MaxLinear mxl692 VSB Frontend)...
[ 83.642103] dvbdev: dvb_create_media_entity: media entity 'MaxLinear mxl692 VSB Frontend' registered.
[ 83.642459] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 83.643245] em28xx 1-3.1:1.0: DVB extension successfully initialized
[ 83.643247] em28xx 1-3.1:1.0: Binding DVB extension
[ 83.645212] dvbdev: DVB: registering new adapter (1-3.1:1.0)
[ 83.645214] em28xx 1-3.1:1.0: DVB: registering adapter 1 frontend 0 (MaxLinear mxl692 VSB Frontend)...
[ 83.645217] dvbdev: dvb_create_media_entity: media entity 'MaxLinear mxl692 VSB Frontend' registered.
[ 83.645607] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 83.646457] em28xx 1-3.1:1.0: DVB extension successfully initialized
[ 83.646459] em28xx 1-3.3:1.0: Binding DVB extension
[ 83.647933] dvbdev: DVB: registering new adapter (1-3.3:1.0)
[ 83.647935] em28xx 1-3.3:1.0: DVB: registering adapter 2 frontend 0 (MaxLinear mxl692 VSB Frontend)...
[ 83.647939] dvbdev: dvb_create_media_entity: media entity 'MaxLinear mxl692 VSB Frontend' registered.
[ 83.648291] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 83.648992] em28xx 1-3.3:1.0: DVB extension successfully initialized
[ 83.648994] em28xx 1-3.3:1.0: Binding DVB extension
[ 83.651672] dvbdev: DVB: registering new adapter (1-3.3:1.0)
[ 83.651674] em28xx 1-3.3:1.0: DVB: registering adapter 3 frontend 0 (MaxLinear mxl692 VSB Frontend)...
[ 83.651677] dvbdev: dvb_create_media_entity: media entity 'MaxLinear mxl692 VSB Frontend' registered.
[ 83.651935] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 83.652552] em28xx 1-3.3:1.0: DVB extension successfully initialized
[ 83.652553] em28xx: Registered (Em28xx dvb Extension) extension
[ 1272.446806] em28xx 1-3.1:1.0: Disconnecting em28xx #2
[ 1272.446809] em28xx 1-3.1:1.0: Disconnecting em28xx
[ 1272.446814] em28xx 1-3.1:1.0: Closing DVB extension
[ 1272.450573] em28xx 1-3.1:1.0: Closing DVB extension
[ 1272.457583] em28xx 1-3.1:1.0: Freeing device
[ 1272.457587] em28xx 1-3.1:1.0: Freeing device
[ 1272.458114] em28xx 1-3.3:1.0: Disconnecting em28xx #3
[ 1272.458115] em28xx 1-3.3:1.0: Disconnecting em28xx
[ 1272.458117] em28xx 1-3.3:1.0: Closing DVB extension
[ 1272.459359] em28xx 1-3.3:1.0: Closing DVB extension
[ 1272.460986] em28xx 1-3.3:1.0: Freeing device
[ 1272.460988] em28xx 1-3.3:1.0: Freeing device
[ 1278.218889] em28xx 1-3.1:1.0: New device HCW quadHD-A @ 480 Mbps (2040:846d, interface 0, class 0)
[ 1278.218894] em28xx 1-3.1:1.0: DVB interface 0 found: bulk
[ 1278.276009] em28xx 1-3.1:1.0: chip ID is em28174
[ 1279.495637] em28xx 1-3.1:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x14798274
[ 1279.495642] em28xx 1-3.1:1.0: EEPROM info:
[ 1279.495646] em28xx 1-3.1:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 1279.519104] em28xx 1-3.1:1.0: AC97 audio (5 sample rates)
[ 1279.519108] em28xx 1-3.1:1.0: 300mA max power
[ 1279.519113] em28xx 1-3.1:1.0: Table at offset 0x27, strings=0x126a, 0x1688, 0x087e
[ 1279.575851] em28xx 1-3.1:1.0: Identified as Hauppauge USB QuadHD ATSC (card=105)
[ 1279.575857] em28xx 1-3.1:1.0: dvb set to bulk mode.
[ 1279.635861] em28xx 1-3.1:1.0: chip ID is em28174
[ 1280.879201] em28xx 1-3.1:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x14798274
[ 1280.879206] em28xx 1-3.1:1.0: EEPROM info:
[ 1280.879210] em28xx 1-3.1:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 1280.902839] em28xx 1-3.1:1.0: AC97 audio (5 sample rates)
[ 1280.902844] em28xx 1-3.1:1.0: 300mA max power
[ 1280.902849] em28xx 1-3.1:1.0: Table at offset 0x27, strings=0x126a, 0x1688, 0x087e
[ 1280.959861] em28xx 1-3.1:1.0: Identified as Hauppauge USB QuadHD ATSC (card=105)
[ 1280.959867] em28xx 1-3.1:1.0: dvb ts2 set to bulk mode.
[ 1281.159057] em28xx 1-3.1:1.0: Binding DVB extension
[ 1281.160914] dvbdev: DVB: registering new adapter (1-3.1:1.0)
[ 1281.160916] em28xx 1-3.1:1.0: DVB: registering adapter 0 frontend 0 (MaxLinear mxl692 VSB Frontend)...
[ 1281.160922] dvbdev: dvb_create_media_entity: media entity 'MaxLinear mxl692 VSB Frontend' registered.
[ 1281.161448] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 1281.162125] em28xx 1-3.1:1.0: DVB extension successfully initialized
[ 1281.162127] em28xx 1-3.1:1.0: Binding DVB extension
[ 1281.164202] dvbdev: DVB: registering new adapter (1-3.1:1.0)
[ 1281.164204] em28xx 1-3.1:1.0: DVB: registering adapter 1 frontend 0 (MaxLinear mxl692 VSB Frontend)...
[ 1281.164208] dvbdev: dvb_create_media_entity: media entity 'MaxLinear mxl692 VSB Frontend' registered.
[ 1281.164518] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 1281.165275] em28xx 1-3.1:1.0: DVB extension successfully initialized
[ 1281.258736] em28xx 1-3.3:1.0: New device HCW quadHD-A @ 480 Mbps (2040:846d, interface 0, class 0)
[ 1281.258738] em28xx 1-3.3:1.0: DVB interface 0 found: bulk
[ 1281.315988] em28xx 1-3.3:1.0: chip ID is em28174
[ 1282.535396] em28xx 1-3.3:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x14798274
[ 1282.535402] em28xx 1-3.3:1.0: EEPROM info:
[ 1282.535408] em28xx 1-3.3:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 1282.558628] em28xx 1-3.3:1.0: AC97 audio (5 sample rates)
[ 1282.558632] em28xx 1-3.3:1.0: 300mA max power
[ 1282.558637] em28xx 1-3.3:1.0: Table at offset 0x27, strings=0x126a, 0x1688, 0x087e
[ 1282.615860] em28xx 1-3.3:1.0: Identified as Hauppauge USB QuadHD ATSC (card=105)
[ 1282.615865] em28xx 1-3.3:1.0: dvb set to bulk mode.
[ 1282.679972] em28xx 1-3.3:1.0: chip ID is em28174
[ 1283.915491] em28xx 1-3.3:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x14798274
[ 1283.915495] em28xx 1-3.3:1.0: EEPROM info:
[ 1283.915498] em28xx 1-3.3:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 1283.941229] em28xx 1-3.3:1.0: AC97 audio (5 sample rates)
[ 1283.941234] em28xx 1-3.3:1.0: 300mA max power
[ 1283.941239] em28xx 1-3.3:1.0: Table at offset 0x27, strings=0x126a, 0x1688, 0x087e
[ 1283.999860] em28xx 1-3.3:1.0: Identified as Hauppauge USB QuadHD ATSC (card=105)
[ 1283.999867] em28xx 1-3.3:1.0: dvb ts2 set to bulk mode.
[ 1284.198997] em28xx 1-3.3:1.0: Binding DVB extension
[ 1284.200804] dvbdev: DVB: registering new adapter (1-3.3:1.0)
[ 1284.200806] em28xx 1-3.3:1.0: DVB: registering adapter 2 frontend 0 (MaxLinear mxl692 VSB Frontend)...
[ 1284.200810] dvbdev: dvb_create_media_entity: media entity 'MaxLinear mxl692 VSB Frontend' registered.
[ 1284.201123] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 1284.201719] em28xx 1-3.3:1.0: DVB extension successfully initialized
[ 1284.201721] em28xx 1-3.3:1.0: Binding DVB extension
[ 1284.203865] dvbdev: DVB: registering new adapter (1-3.3:1.0)
[ 1284.203867] em28xx 1-3.3:1.0: DVB: registering adapter 3 frontend 0 (MaxLinear mxl692 VSB Frontend)...
[ 1284.203870] dvbdev: dvb_create_media_entity: media entity 'MaxLinear mxl692 VSB Frontend' registered.
[ 1284.204129] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 1284.204826] em28xx 1-3.3:1.0: DVB extension successfully initialize
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