Hi all,
Ive found some focal aria 948 speakers for a banger deal.
But the only thing holding me back is that ive rad that they can be quit hard to drive due to a large impedance dip down to about 2.5ohms in the frequency range of 70-110hz.
do you think the aleph j will be fine for these?
Ive found some focal aria 948 speakers for a banger deal.
But the only thing holding me back is that ive rad that they can be quit hard to drive due to a large impedance dip down to about 2.5ohms in the frequency range of 70-110hz.
do you think the aleph j will be fine for these?
Gotta Build 'EM All!
I want to be the very best
Like no one ever was
To build them is my real test
To listen them is my cause
I will travel across the land
Searching far and wide
Each Firstwatt to understand
The power that's inside
... etc
I want to be the very best
Like no one ever was
To build them is my real test
To listen them is my cause
I will travel across the land
Searching far and wide
Each Firstwatt to understand
The power that's inside
... etc
Yes, thank you that is what I am after
-- perhaps this is how I got all my parts originally.
Impedance is futile
On the topic of difficult impedance, while possibly not matched that well with my DBR-62 I am still enjoying my Aleph-J's attributes. I'm primarily a soundstage / space chaser so its working out for me so far. Maybe a different amp would do better with these, or a better choice of speaker would fit this one. Nothing for it but to explore those options.
On the topic of difficult impedance, while possibly not matched that well with my DBR-62 I am still enjoying my Aleph-J's attributes. I'm primarily a soundstage / space chaser so its working out for me so far. Maybe a different amp would do better with these, or a better choice of speaker would fit this one. Nothing for it but to explore those options.
Pass DIY Addict
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I'm thinking a number of speaker manufacturers would call that one a "nominal 8 ohm load." Typically, anything north of 6 ohms gets lumped into the 8R category. This speaker only dips below 6 ohms from 150-300Hz (a small range of frequencies). Sure, at 125Hz we get the double whammy of 60 degree phase angle plus lower impedance, but the box tuning lies at 50Hz with a corresponding phase angle that is pretty close to zero degrees. Most "reasonably" robust amps will be pretty happy with this load.
Well I'm going to price up the f4, ba3 as I already have the preamp board and jfets and maybe an f5t build. Quite keen on these focals as they're half price atm.
I'm. Open to suggestions on any other diy amps for these speakers if anyone has an idea
🙂
I'm. Open to suggestions on any other diy amps for these speakers if anyone has an idea
🙂
@BenE123
FWIW I drive a pair of 1028BE with one ACA at times and it works fine for me. Not sure how they compare to the Aria 948 on paper.
The Aleph J would have roughly the same output into 4 ohms as an ACA? Yes?
I’ll be building an Aleph J next…okay not next, but the one after that.
FWIW I drive a pair of 1028BE with one ACA at times and it works fine for me. Not sure how they compare to the Aria 948 on paper.
The Aleph J would have roughly the same output into 4 ohms as an ACA? Yes?
I’ll be building an Aleph J next…okay not next, but the one after that.
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Pass DIY Addict
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BenE: as ZM was indicating earlier, you might want to look into push-pull amps with impedance curves that dip that low. This is especially the case with that blue curve that seems to spend lots of time between 2 and 4 ohms. Single ended amps may struggle more with these designs.
Ahhh okay, makes sense. Thank You for the clarification Eric! I've been eyeing up building an f4 for a while, so this is as good of an excuse to make a new all as any. But I'll do some research into a few others too and then decide
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My apologies if I misread the graph. I thought the dotted line on top is phase and the two solid lines at the bottom are impedance curves for two different speakers…