I have a set of these in my walls. Do you think the v3 mono could drive them well?
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Fosi Audio V3 Mono Amplifier Review
- Thread starter amirm
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I have just joined the forum, I've been reading various posts about 2 weeks now. I found you AFTER I had received my Hifiman Ananda Nano headphone and read the reviews here on your forum 
. Live and learn... After reading the review here I have just joined the Kickstarter campaign for the Fosi Audio V3 Mono. I've ordered 2 amps and 2 power supplies for less than $225 total, shipping is scheduled for June 2024. I'm going to show my extreme ignorance here, will I be able to use a subwoofer with these 2 mono amps? I see that they only have outputs for 2 speakers when using both amps. I've seen diagrams for car audio mono amps with multiple speaker outputs, but is it feasible with a set up like the Mono V3 (only 2 speaker outputs total), and a pair of JBL A130 speakers?
. Live and learn... After reading the review here I have just joined the Kickstarter campaign for the Fosi Audio V3 Mono. I've ordered 2 amps and 2 power supplies for less than $225 total, shipping is scheduled for June 2024. I'm going to show my extreme ignorance here, will I be able to use a subwoofer with these 2 mono amps? I see that they only have outputs for 2 speakers when using both amps. I've seen diagrams for car audio mono amps with multiple speaker outputs, but is it feasible with a set up like the Mono V3 (only 2 speaker outputs total), and a pair of JBL A130 speakers?
You’ll need to identify which subwoofer you’re thinking of, and what you’re going to use for volume control. If you plan to get a preamp to control volume, you can choose one with multiple outputs so one pair of outputs goes to the V3 Monos to drive the speakers and another set of outputs feeds the subwoofer. All subwoofers have line level inputs so that for sure would work. If you plan to use a source with integrated volume control and won’t use a preamp, then you will need to pick a subwoofer that also has Speaker Level inputs which the sub would wire into the speaker level output of one of the V3 Monos.I have just joined the forum, I've been reading various posts about 2 weeks now. I found you AFTER I had received my Hifiman Ananda Nano headphone and read the reviews here on your forum
-Ed
Thanks, I may have to buy another preamp or choose a subwoofer with the speaker level inputs. I was going to use my IFI Zen preamp/DAC for volume control (only 2 RCA outputs and a 4.4mm balanced out). Again I wish I had found this forum first, but thanks. At least I know it can be done. I'll be eager to hear these amps on these speakers to see how long I can last without buying a subwoofer.
Converting from balanced to single-ended can easily be done passively. You can use the 4.4mm balanced out to subwoofer with this:
EDIT: You will also need to add some sort of in-line attenuator or volume dial to cut the signal down as I just realized your 4.4mm output is amplified, not line level. Something like this:
So now instead of the original cable I listed, you would use this one instead:
-Ed
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My wife is not going to like the idea me purchasing a subwoofer before I even set up my new amps (I'll send her here to the forum if it gets ugly, you can help explain it ), but man, I just ordered a new pair of the JBL A130 speakers (from Japan of all places, no one in the U.S. seems to have any), and I know I'll want lower bass. Thanks! I'll be ordering one of the adapters and a new subwoofer real soon .
), but man, I just ordered a new pair of the JBL A130 speakers (from Japan of all places, no one in the U.S. seems to have any), and I know I'll want lower bass. Thanks! I'll be ordering one of the adapters and a new subwoofer real soon .
I did indicate above https://www.audiosciencereview.com/...o-v3-mono-amplifier-review.53474/post-1964645My wife is not going to like the idea me purchasing a subwoofer before I even set up my new amps (I'll send her here to the forum if it gets ugly, you can help explain it
how you can use the subwoofer you already have with the iFi Nano.
-Ed
Nahkarankaisija
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Anyone have any recommendations for a preamp to pair with the two Fosi monoblocks? Budget is 300€ and it needs to have a "reliable" volume control so my 99 db efficient DIY speakers don't destroy my hearing should an accident happen and the monos push full watts to the speakers. I was thinking Topping but there were some posts here where the Topping preamp/dac suddenly pushed full volume which I am trying to avoid.
Shh, I don't want my wife to know all the secrets.... Yes I did see that, I'm going to brainstorm (okay for me it's more like brain sprinkle), on what and how to set things up. You are most helpful. I hope to be listening to something other than headphones and cheap Bluetooth speakers real soon.
I'm in the same boat, wanting to add a bit of extra power to my Audiolab 7000A. For the price, the V3 monos are a no brainer in my opinion.
georgehifi
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To me not a comfortable load for Class-D like these. Class-D's like Hypex NC500's would breath easier into them.
They dip to 3ohms around 100hz and 1khz and that's without taking any -phase (which they don't show) into account (EPDR) as well which "could" make them even lower impedance load. Cheers George
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I was afraid of that. Hypex is unfortunately out of my budget right now. Do you think the v3 monos would at least be better than a middle range AVR driving these?
georgehifi
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How longs a piece of string, but at theater sound levels, if I could afford it I'd go with a multi channel amp these seem to be good value
Cheers George
early rejecter
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Assuming he’s sticking with the iFi Zen, is there any reason to not just use RCA splitters to send the signal from the pre-amp to both the amps and subwoofer? That’s what I’ve always done with my pre-amps that don’t have dedicated subwoofer output.
I actually am not aware of a reason other than is there a potential voltage drop for each of the post-split outputs? If not then this works too.
-Ed
These will put out much more power than most any budget/midrange receiver (especially with all channels driven). Call me counter, but given the Fosi's excellent 2-ohm performance (including resistive and capacitive loads), I'd have no problem giving them a go (and I will myself, as soon as Fosi answers to the 10A power supply peculiarities).
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Worth a shot then. I was planning on ordering a 2nd 10A power supply and running each of them on their own.
My problem with this is the price. The 48v "10A" is quite expensive. Aiyima's is much less and seems to be genuine. Not sure we should be 'encouraged' to double up just because the power supply is not as described. Fosi may have tested "a" 48volt 10a supply, but we need "the" 48volt 10a supply to be 48v10a. It should be easy to clear this up though.
I agree with this. Right now what I end up getting depends on what they say on their 10A supplies. Maybe just get two bare amps and get the supplies seperate
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