Markaudio develops for a number of commercial and high end customers in Asia, Europe and North America.
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Alpair 5 Grey
order no. BP-aa5grey on request (_)
6 cm full range driver with metal cone. A pair of speakers is delivered (the price is for one pair). The ribber surround is invers. The spider is rear ventilated for better cooling.
- power handling (continuous/programme) = 6/12 W
- frequency range = 100-30000 Hz
- resonance frequency fs = 136 Hz
- impedance R = 4 Ohm
- sound pressure level SPL = 85 dB (2,83V; 1m)
- DC resistance Re = 3,6 Ohm
- force factor BL = 2,16 N/A
- voice coil inductance L = 0,5935 mH
- effective piston radiating area Sd = 27,3 cm2
- effective mechanical mass incl. air load mms = 1,6 g
- equivalent volume of compliance Vas = 0,96 l
- total Q factor Qts = 0,75 (Qms=2,14, Qes=1,16)
- mounting diameter d = 82 mm
- overall diameter d = 100 mm
- mounting depth (not countersunk) t = 39,5 mm
PDF data sheet
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Alpair 5 Gold
order no. BP-aa5gold  - not available
6 cm full range driver with metal cone. A pair of speakers is delivered (the price is for one pair). The ribber surround is invers. The spider is rear ventilated for better cooling.
- power handling (continuous/programme) = 6/12 W
- frequency range = 100-30000 Hz
- resonance frequency fs = 125 Hz
- impedance R = 4 Ohm
- sound pressure level SPL = 84,5 dB (2,83V; 1m)
- DC resistance Re = 3,6 Ohm
- force factor BL = 2,17 N/A
- voice coil inductance L = 0,5517 mH
- effective piston radiating area Sd = 27,3 cm2
- effective mechanical mass incl. air load mms = 1,53 g
- equivalent volume of compliance Vas = 1,1 l
- total Q factor Qts = 0,72 (Qms=2,13, Qes=1,08)
- mounting diameter d = 82 mm
- overall diameter d = 100 mm
- mounting depth (not countersunk) t = 39,5 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 1,7 L volume
from 120/75 Hz (-3dB/-8dB)
recommended cabinet 2:
7 L volume bass reflex cabinet
with HP35 reflex tube, 7 cm long.
from 55/47 Hz (-3dB/-8dB).
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Alpair 6 Grey
order no. BP-aa6rectgray - not available
8 cm full range driver with metal cone. A pair of speakers is delivered (the price is for one pair). The ribber surround is invers.
- power handling (continuous/programme) = 15/30 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 74 Hz
- impedance R = 4 Ohm
- sound pressure level SPL = 86 dB (2,83V; 1m)
- DC resistance Re = 3,6 Ohm
- force factor BL = 2,87 N/A
- voice coil inductance L = 0,6255 mH
- effective piston radiating area Sd = 38 cm2
- effective mechanical mass incl. air load mms = 2,93 g
- equivalent volume of compliance Vas = 3,3 l
- total Q factor Qts = 0,48 (Qms=2,5, Qes=0,6)
- mounting diameter d = 75 mm
- overall diameter d = 92 mm
- mounting depth (not countersunk) t = 52,5 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 1,7 L volume
from 120/75 Hz (-3dB/-8dB)
recommended cabinet 2:
7 L volume bass reflex cabinet
with HP50 reflex tube, 17 cm long.
from 55/47 Hz (-3dB/-8dB).
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Alpair 6 Gold
order no. BP-aa6roundgold on request (_)
8 cm full range driver with metal cone. A pair of speakers is delivered (the price is for one pair). The ribber surround is invers.
- power handling (continuous/programme) = 15/30 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 74 Hz
- impedance R = 4 Ohm
- sound pressure level SPL = 86 dB (2,83V; 1m)
- DC resistance Re = 3,6 Ohm
- force factor BL = 2,87 N/A
- voice coil inductance L = 0,6255 mH
- effective piston radiating area Sd = 38 cm2
- effective mechanical mass incl. air load mms = 2,93 g
- equivalent volume of compliance Vas = 3,3 l
- total Q factor Qts = 0,48 (Qms=2,5, Qes=0,6)
- mounting diameter d = 96 mm
- overall diameter d = 114 mm
- mounting depth (not countersunk) t = 52,5 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 3,3 L volume
from 95/60 Hz (-3dB/-8dB)
recommended cabinet 2:
12,7 L volume bass reflex cabinet
with HP50 reflex tube, 14 cm long.
from 42/37 Hz (-3dB/-8dB).
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Alpair 7 Grey
order no. BP-aa7roundgray - not available
12 cm full range driver with metal cone. A pair of speakers is delivered (the price is for one pair). The ribber surround is invers.
- power handling (continuous/programme) = 20/40 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 69 Hz
- impedance R = 4 Ohm
- sound pressure level SPL = 84,5 dB (2,83V; 1m)
- DC resistance Re = 3,6 Ohm
- force factor BL = 3,34 N/A
- voice coil inductance L = 0,018 mH
- effective piston radiating area Sd = 50,24 cm2
- effective mechanical mass incl. air load mms = 5,66 g
- equivalent volume of compliance Vas = 3,48 l
- total Q factor Qts = 0,57 (Qms=2,015, Qes=0,803)
- mounting diameter d = 103 mm
- overall diameter d = 135 mm
- mounting depth (not countersunk) t = 73 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 3,3 L volume
from 95/60 Hz (-3dB/-8dB)
recommended cabinet 2:
12,7 L volume bass reflex cabinet
with HP50 reflex tube, 14 cm long.
from 42/37 Hz (-3dB/-8dB).
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Alpair 7 Gold
order no. BP-aa7roundgold - not available
12 cm full range driver with metal cone. A pair of speakers is delivered (the price is for one pair). The ribber surround is invers.
- power handling (continuous/programme) = 20/40 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 69 Hz
- impedance R = 4 Ohm
- sound pressure level SPL = 84,5 dB (2,83V; 1m)
- DC resistance Re = 3,6 Ohm
- force factor BL = 3,34 N/A
- voice coil inductance L = 0,018 mH
- effective piston radiating area Sd = 50,24 cm2
- effective mechanical mass incl. air load mms = 5,66 g
- equivalent volume of compliance Vas = 3,48 l
- total Q factor Qts = 0,57 (Qms=2,015, Qes=0,803)
- mounting diameter d = 103 mm
- overall diameter d = 135 mm
- mounting depth (not countersunk) t = 73 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 3,2 L volume
from 98/62 Hz (-3dB/-8dB)
recommended cabinet 2:
12,9 L volume bass reflex cabinet
with HP50 reflex tube, 13 cm long.
from 44/38 Hz (-3dB/-8dB).
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CHR-70 Grey
order no. BP-aachr70gray EUR 69,90 
11 cm full range driver with metal cone. The ribber surround is invers.
- power handling (continuous/programme) = 20/40 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 68 Hz
- impedance R = 4 Ohm
- sound pressure level SPL = 84,5 dB (2,83V; 1m)
- DC resistance Re = 3,6 Ohm
- force factor BL = 3,092 N/A
- voice coil inductance L = 0,024 mH
- effective piston radiating area Sd = 50 cm2
- effective mechanical mass incl. air load mms = 4,68 g
- equivalent volume of compliance Vas = 4,2 l
- total Q factor Qts = 0,55 (Qms=2, Qes=0,75)
- mounting diameter d = 103 mm
- overall diameter d = 124 mm
- mounting depth (not countersunk) t = 59 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 3,2 L volume
from 98/62 Hz (-3dB/-8dB)
recommended cabinet 2:
12,9 L volume bass reflex cabinet
with HP50 reflex tube, 13 cm long.
from 44/38 Hz (-3dB/-8dB).
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CHR-70 Gold
order no. BP-aachr70gold - not available
11 cm full range driver with metal cone. The ribber surround is invers.
- power handling (continuous/programme) = 20/40 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 68 Hz
- impedance R = 4 Ohm
- sound pressure level SPL = 84,5 dB (2,83V; 1m)
- DC resistance Re = 3,6 Ohm
- force factor BL = 3,092 N/A
- voice coil inductance L = 0,024 mH
- effective piston radiating area Sd = 50 cm2
- effective mechanical mass incl. air load mms = 4,68 g
- equivalent volume of compliance Vas = 4,2 l
- total Q factor Qts = 0,55 (Qms=2, Qes=0,75)
- mounting diameter d = 103 mm
- overall diameter d = 124 mm
- mounting depth (not countersunk) t = 59 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 3,6 L volume
from 94/59 Hz (-3dB/-8dB)
recommended cabinet 2:
11,8 L volume bass reflex cabinet
with HP50 reflex tube, 17 cm long.
from 50/39 Hz (-3dB/-8dB).
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Alpair 10 Grey
order no. BP-aa10silver - not available
15 cm full range driver with metal cone. The ribber surround is invers.
- power handling (continuous/programme) = 35/70 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 40 Hz
- impedance R = 6 Ohm
- sound pressure level SPL = 87 dB (2,83V; 1m)
- DC resistance Re = 5,4 Ohm
- force factor BL = 5,83 N/A
- voice coil inductance L = 0,7023 mH
- effective piston radiating area Sd = 90 cm2
- effective mechanical mass incl. air load mms = 9,24 g
- equivalent volume of compliance Vas = 19,5 l
- total Q factor Qts = 0,33 (Qms=2,24, Qes=0,39)
- mounting diameter d = 137 mm
- overall diameter d = 160 mm
- mounting depth (not countersunk) t = 78 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 3,6 L volume
from 94/59 Hz (-3dB/-8dB)
recommended cabinet 2:
11,8 L volume bass reflex cabinet
with HP50 reflex tube, 17 cm long.
from 50/39 Hz (-3dB/-8dB).
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Alpair 10 Gold
order no. BP-aa10gold - not available
15 cm full range driver with metal cone. The ribber surround is invers.
- power handling (continuous/programme) = 35/70 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 40 Hz
- impedance R = 6 Ohm
- sound pressure level SPL = 87 dB (2,83V; 1m)
- DC resistance Re = 5,4 Ohm
- force factor BL = 5,83 N/A
- voice coil inductance L = 0,7023 mH
- effective piston radiating area Sd = 90 cm2
- effective mechanical mass incl. air load mms = 9,24 g
- equivalent volume of compliance Vas = 19,5 l
- total Q factor Qts = 0,33 (Qms=2,24, Qes=0,39)
- mounting diameter d = 137 mm
- overall diameter d = 160 mm
- mounting depth (not countersunk) t = 78 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 3,9 L volume
from 111/70 Hz (-3dB/-8dB)
recommended cabinet 2:
12,6 L volume bass reflex cabinet
with HP70 reflex tube, 21 cm long.
from 59/46 Hz (-3dB/-8dB).
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Alpair 12 Grey
order no. BP-aa12roundgrey - not available
19 cm full range driver with metal cone. The ribber surround is invers.
- power handling (continuous/programme) = 50/100 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 46 Hz
- impedance R = 8 Ohm
- sound pressure level SPL = 89,3 dB (2,83V; 1m)
- DC resistance Re = 7 Ohm
- force factor BL = 8,75 N/A
- voice coil inductance L = 0,058 mH
- effective piston radiating area Sd = 143 cm2
- effective mechanical mass incl. air load mms = 15,87 g
- equivalent volume of compliance Vas = 22,8 l
- total Q factor Qts = 0,33 (Qms=1,454, Qes=0,42)
- mounting diameter d = 169 mm
- overall diameter d = 207 mm
- mounting depth (not countersunk) t = 95 mm
PDF data sheet
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recommended cabinet 1:
closed cabinet with 3,9 L volume
from 111/70 Hz (-3dB/-8dB)
recommended cabinet 2:
12,6 L volume bass reflex cabinet
with HP70 reflex tube, 21 cm long.
from 59/46 Hz (-3dB/-8dB).
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Alpair 12 Gold
order no. BP-aa12roundgold - not available
19 cm full range driver with metal cone. The ribber surround is invers.
- power handling (continuous/programme) = 50/100 W
- frequency range = 80-20000 Hz
- resonance frequency fs = 46 Hz
- impedance R = 8 Ohm
- sound pressure level SPL = 89,3 dB (2,83V; 1m)
- DC resistance Re = 7 Ohm
- force factor BL = 8,75 N/A
- voice coil inductance L = 0,058 mH
- effective piston radiating area Sd = 143 cm2
- effective mechanical mass incl. air load mms = 15,87 g
- equivalent volume of compliance Vas = 22,8 l
- total Q factor Qts = 0,33 (Qms=1,454, Qes=0,42)
- mounting diameter d = 169 mm
- overall diameter d = 207 mm
- mounting depth (not countersunk) t = 95 mm
PDF data sheet
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Alpair 10 Grey Woofer
order no. BP-aa10woofer - not available
15 cm bass-midrange driver with metal cone. The ribber surround is invers.
- power handling (continuous/programme) = 35/70 W
- frequency range = 20-2000 Hz
- resonance frequency fs = 35 Hz
- impedance R = 6 Ohm
- sound pressure level SPL = 86,2 dB (2,83V; 1m)
- DC resistance Re = 5,4 Ohm
- force factor BL = 6,25 N/A
- voice coil inductance L = 0,288727 mH
- effective piston radiating area Sd = 89,9 cm2
- effective mechanical mass incl. air load mms = 11,22 g
- equivalent volume of compliance Vas = 21 l
- total Q factor Qts = 0,3 (Qms=2,37, Qes=0,35)
- mounting diameter d = 137 mm
- overall diameter d = 160 mm
- mounting depth (not countersunk) t = 78 mm
PDF data sheet
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The cabinet volume calculations are executed considering
an external resistance of 0.3 Ohm. We are using, if
no other data is known or available, the information supplied
by the manufacturer.