Using a TC electronic 750 with a 4 ohms and 8 ohms cab together

[liffordmark]

I am useless when it comes to Ohms
wonder if I connected a rs212 tc 8 Ohms cabinet with a Mesa boogie walkabout 112 4 Ohms cab to a TC electronic 750 amp would that be ok????????

[MDWagstaff]

No, the RH750 has a minimum 4ohm output, the Mesa on its own would be the limit

[Musashimonkey]

The RH750 does let you string 3 TC cabs together, so would likely be fine if the Mesa cab is accurate in its rating. But the 4ohm cab would get twice the power from the amp.

[Bill Fitzmaurice]

[quote name='Musashimonkey' timestamp='1467397193' post='3083466']
The RH750 does let you string 3 TC cabs together
[/quote]As I recall that's because the TC cabs are actually higher than 8 ohms.

[chris_b]

The RH750 goes to 2.67 ohms. It's on the web site. A 4 ohm cab with an 8 ohm cab is fine with this amp.

Look at the table on page 7
[url="http://cdn-downloads.tcelectronic.com/media/914735/tc_electronic_bass_amp_power_rating___active_power_management.pdf"]http://cdn-downloads..._management.pdf[/url]

min load column. . . . 2.66R.

[Oldman]

[quote name='chris_b' timestamp='1467419711' post='3083626']
The RH750 goes to 2.67 ohms. It's on the web site. A 4 ohm cab with an 8 ohm cab is fine with this amp.

Look at the table on page 7
[url="http://cdn-downloads.tcelectronic.com/media/914735/tc_electronic_bass_amp_power_rating___active_power_management.pdf"]http://cdn-downloads..._management.pdf[/url]

min load column. . . . 2.66R.
[/quote]

What he said , and.....

http://www.speakerimpedance.co.uk/?act=four_parallel&page=calculator

[Bill Fitzmaurice]

[quote name='chris_b' timestamp='1467419711' post='3083626']
The RH750 goes to 2.67 ohms. It's on the web site. A 4 ohm cab with an 8 ohm cab is fine with this amp.
Look at the table on page 7
[url="http://cdn-downloads.tcelectronic.com/media/914735/tc_electronic_bass_amp_power_rating___active_power_management.pdf"]http://cdn-downloads..._management.pdf[/url]
min load column. . . . 2.66R.
[/quote]One must read the fine print. They'll only handle 2.66 ohms with Active Power Management engaged, which significantly lowers output capacity. The same July 2011 Bass Gear review of the TC amps that discovered their overstating of actual RMS continuous measured output of their amps also discovered that the RS210 was 10.5 ohms, and the RS212 11.5 ohms.

[chris_b]

[quote name='Bill Fitzmaurice' timestamp='1467464905' post='3083875']
One must read the fine print. They'll only handle 2.66 ohms with Active Power Management engaged, which significantly lowers output capacity. The same July 2011 Bass Gear review of the TC amps that discovered their overstating of actual RMS continuous measured output of their amps also discovered that the RS210 was 10.5 ohms, and the RS212 11.5 ohms.
[/quote]

Active power management isn't switched on or off. it is on all the time.

Fine print not required. I owned an RH750 and ran it with 3 8 ohm cabs and it was fine. Any issues and the amp immediately goes into protection mode. Plugging in the wrong cabs cannot damage this amp. And the watts thing is irrelevant to this thread. This amp is as as loud as any 750 watt amp I've heard.