It has a passive subwoofer output mode (selectable with a switch at the bottom). In that mode, the volume control can be very handy, or even necessary to properly integrate the sub.
Last edited:
-
WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required. There are many reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!
Aiyima A70 Mono - Leaked?
- Thread starter andrelambert_
- Start date
- Joined
- Sep 10, 2020
- Messages
- 136
- Likes
- 378
Yes, correct is 20hz-20khz （±0.5DB）
OP
andrelambert_
Member
Two frequency controls for the sub? One on the front and one on back? Am I understanding this right?
Do they choose features for their products by pulling them out of a hat?
Do they choose features for their products by pulling them out of a hat?
- Joined
- Sep 10, 2020
- Messages
- 136
- Likes
- 378
Passive subwoofer cutoff frequency adjustment on the front, active subwoofer cutoff frequency adjustment on the back
Roland68
Major Contributor
It seems to me as if this was again designed by someone who knows nothing about audio.
Two things make absolutely no sense to me:
The crossover is always active and always cuts off the frequencies for the main speakers? Even if I don't need a subwoofer?
Most subwoofers only have an RCA input. But not all recordings have the bass mixed equally on the left and right.
Seems to be a product that could make inexperienced users unhappy.
restorer-john
Grand Contributor
OP
andrelambert_
Member
- Thread Starter
- #29
First point: 99% sure this product doesn't have a high pass filter for the mains, when using the sub. None of the previous Aiyima or Fosi Audio products do, which is unfortunate. Then again, I don't think that would work for a monoblock amp...
As stated by the manufacturer, the front sub frequency knob is for when the amp is being used as a passive subwoofer amp.
Second point: Yeah, seems like you have to choose between feeding the sub either the left or right channel. Should be okay for 80% of the time, but for sure isn't the best implementation.....
i think most modern subwoofers have ability to accept a stereo signal and sum it - that's not a problem
I think the front LEFT know is the sub vol. right?
and yeah i think without any way to control the cutoff of the MAIN L/R speakers then this thing is not too useful at all unless you are intending to use small speaker already cut at 60-70-80 etc.
I think the front LEFT know is the sub vol. right?
and yeah i think without any way to control the cutoff of the MAIN L/R speakers then this thing is not too useful at all unless you are intending to use small speaker already cut at 60-70-80 etc.
Roland68
Major Contributor
Even if small speakers limit themselves, it is the worst possible idea.
Such speakers in particular benefit greatly from active filtering of the low frequencies.
100% there's a hole in the market for an integrated amp with cut offs for the main speakers
and possibly some way to control the slope for the mains AND subs - preferably in the digital domian
the fact there is such a hole in the market shows how they as a whole are not listening to consumer demands
and possibly some way to control the slope for the mains AND subs - preferably in the digital domian
the fact there is such a hole in the market shows how they as a whole are not listening to consumer demands
OP
andrelambert_
Member
- Thread Starter
- #34
Could you elaborate? I don't understand what you mean.
Last edited:
- Joined
- Jul 21, 2018
- Messages
- 1,062
- Likes
- 914
I mean that I am amazed that amps do not come with an optional high pass filter for use with subs these days.
As pro-audio speakers (for sound reinforcement) are made for use with subs, they are designed to play above around 70-80Hz approx, so they don't waste amplifier power playing lower frequencies.
As pro-audio speakers (for sound reinforcement) are made for use with subs, they are designed to play above around 70-80Hz approx, so they don't waste amplifier power playing lower frequencies.
Guddu
Major Contributor
- Joined
- Feb 10, 2020
- Messages
- 1,227
- Likes
- 1,173
OK, that makes more sense, I was too harsh. But it is a unique (unusual) feature.
Roland68
Major Contributor
Which passive pro audio speakers have a built-in passive high-pass filter?
- Joined
- Jul 21, 2018
- Messages
- 1,062
- Likes
- 914
Not sure. I use Tannoy V12s. They do not have a built in passive HPF, but are designed to roll off naturally around 70Hz, as are most pro-audio speakers of this type. The drivers are designed to be more efficient, rather than go deep. The upshot is your amp doesn't need as much power and doesn't waste power on the lower frequencies. These are played by your sub/s.
Last edited:
- Joined
- Sep 10, 2020
- Messages
- 136
- Likes
- 378
Tested 300W/4 ohm load/distortion 8.3% using continuous signal at room temperature of 78.8 degrees Fahrenheit.
Tested over 10 minutes with less than 2W loss and 5 minutes with less than 1W loss.
Power at 1% is 190W/4 ohms, continuous signal can work continuously without loss Frequency Response 20Hz-20Khz (±0.5dB)
Similar threads
