Topic: Battery Geeks 9/12-66 > R-44

[cashandkerouac]

i have been using the Battery Geeks 9/12-66 "Freedom E" to power my R-44 and it has always performed flawlessly.  since it's never come close to dying during a show or a festival i was curious how long it would actually last.  i ran a home test last night with a 2-channel setup and am sharing the results in case anyone is interested. 

equipment: ck5 caps > 451eb bodies > T-Gak cable > R-44
R-44 record settings: 16 bit/44.1 kHz
Phantom Power: provided by R-44 on channels 1 and 2
9/12-66 setting: 12v
total continuous run-time: 13 hours, 42 minutes


Specs for the 9V/12V Freedom E Battery Pack:
 
Voltage: 9v-12v (features a 9V/12V selector switch)
Current: 3.33 amps (max)
Capacity: 8000 mAh
Capacity: 66 wH
Chemistry: Li-Ion
Weight: 1 lb.
Dimensions: 6.25½ x 3½ x 0.75½
Run-time: 7-8 hours
Recharge Time: 3 - 3.5 hours
Recharge Cycles: >500
AC Charger: 100-240 VAC; 47-63 Hz

[tim in jersey]

Marking thread. On the fence about purchasing r-44. Sounds like it is easy to power, so that's good...

[DSatz]

bass_ur_face, are your microphones the AKG C 451 EB from the 1970s, which were very power-hungry (~6 mA per microphone at 48 Volts!), or are they the more recent (electret) C 451 B that only take about 1/3 as much current?

(If you have the older type, its capsules are readily removable / replaceable / interchangeable with capsules of other patterns from the same series. The newer type is a fixed-pattern cardioid.)

--best regards

[cashandkerouac]

bass_ur_face, are your microphones the AKG C 451 EB from the 1970s, which were very power-hungry (~6 mA per microphone at 48 Volts!), or are they the more recent (electret) C 451 B that only take about 1/3 as much current?

(If you have the older type, its capsules are readily removable / replaceable / interchangeable with capsules of other patterns from the same series. The newer type is a fixed-pattern cardioid.)

--best regards

sorry for the delayed response... they are the 451EB bodies that allow for interchangeable capsules.

[Hypnocracy]

bass_ur_face, are your microphones the AKG C 451 EB from the 1970s, which were very power-hungry (~6 mA per microphone at 48 Volts!), or are they the more recent (electret) C 451 B that only take about 1/3 as much current?

(If you have the older type, its capsules are readily removable / replaceable / interchangeable with capsules of other patterns from the same series. The newer type is a fixed-pattern cardioid.)

--best regards

sorry for the delayed response... they are the 451EB bodies that allow for interchangeable capsules.

So my favorite outdoor festival omni the Avenson STO-2 are power pigs too...

Power Requirements    P48 phantom power (~6 mA)