ST70s as Mono Blocks

Bugs · 16 Re: ST70s as Mono Blocks on Fri Jul 17, 2009 8:09 pm

Bugs

Posts: 54
Join date: 2009-04-17

Hi Bob,

I'm being overly cautious, I just want to make sure I'm not causing any problems down the line.

Is it safe to assume that if I use two ST70s and two biampable 4 ohm speakers (using the passive crossovers) and one ST70 drives the right channel and the other the left channel and on each ST70 one output drives the bass and the other output drives the mid and high I should be okay?

Can the output transformer driving the mid and high on each ST70 potentially see a short?

Bob Latino · 17 Re: ST70s as Mono Blocks on Fri Jul 17, 2009 8:15 pm

Bob Latino

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Location: Massachusetts

Bugs wrote:Hi Bob,

I'm being overly cautious, I just want to make sure I'm not causing any problems down the line.

Is it safe to assume that if I use two ST70s and two biampable 4 ohm speakers (using the passive crossovers) and one ST70 drives the right channel and the other the left channel and on each ST70 one output drives the bass and the other output drives the mid and high I should be okay?

Can the output transformer driving the mid and high on each ST70 potentially see a short?

Bugs,

Measure the static resistance of both the woofer and the tweeter sections and let us know what you got for readings.

Bob

Bugs · 18 Re: ST70s as Mono Blocks on Fri Jul 17, 2009 8:41 pm

Bugs

Posts: 54
Join date: 2009-04-17

Well, that's enlightening. Across the bass speaker wire terminal I get 4.7 ohms and across the mid/tweet terminal I get 0 ohms. Can't tell if my meter reads in fractions of an ohm?

Sounds like a straight short to me. Shocked

Bob Latino · 19 Re: ST70s as Mono Blocks on Sat Jul 18, 2009 7:18 am

Bob Latino

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Bugs wrote:Well, that's enlightening. Across the bass speaker wire terminal I get 4.7 ohms and across the mid/tweet terminal I get 0 ohms. Can't tell if my meter reads in fractions of an ohm?

Sounds like a straight short to me.

Bugs,

The readings don't sound right to me ? Together the readings in parallel (4.7 ohms and 0 ohms) are still a dead short. The speaker manufacturer wouldn't have their speaker set up to look like a dead short to the amplifier?

Are you sure you are not getting 4.7 ohms on the woofer section and a very HIGH resistance on the tweeter? That would seem to make more sense?

Bob

Bugs · 20 Re: ST70s as Mono Blocks on Sat Jul 18, 2009 10:55 am

Bugs

Posts: 54
Join date: 2009-04-17

Hi Bob, what my meter reads is 0F, independent of the scale I'm using.

This checked at the speaker wire terminals/taps if that is the right place to test them?

16 Re: ST70s as Mono Blocks on Fri Jul 17, 2009 8:09 pm

Bugs

17 Re: ST70s as Mono Blocks on Fri Jul 17, 2009 8:15 pm

Bob Latino

18 Re: ST70s as Mono Blocks on Fri Jul 17, 2009 8:41 pm

Bugs

19 Re: ST70s as Mono Blocks on Sat Jul 18, 2009 7:18 am

Bob Latino

20 Re: ST70s as Mono Blocks on Sat Jul 18, 2009 10:55 am

Bugs