FWIW, I modified my 8-ch amp by replacing one of the 2x150W modules with a 2x300W. It was a tight fit. This was to increase the power for the woofers of the LX521-ish speaker I built for my son. That system had two Peerless SLS10" in "W" OB config, which proved not punchy enough for him. I ended up modifying it by pulling the SLS woofers, turning the W frame into a closed box & installing a Dayton RS265HF subwoofer driver w/200Hz LR4 crossover & DSP PEQ below 50Hz. The revised speakers totally kick ***. With heavy bass tracks, the whole 14x22x9' room shakes. My son & his friends can't believe the sheer power, especially in the bass, that these 1.3 cf boxes & the modest looking amp is putting out.
The amp is under the Wiim & miniDSP.
Sealed monopole bass + OB above 200Hz.
The amp is under the Wiim & miniDSP.
Sealed monopole bass + OB above 200Hz.
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Hello everybody! My first project!
So far, without a chassis, another buffer board and without an input and output selector. I can't decide how many encoder knobs there should be and whether to make a preamp output. And do you even need knobs if there is a remote control.
I really like this chassis:
So far, without a chassis, another buffer board and without an input and output selector. I can't decide how many encoder knobs there should be and whether to make a preamp output. And do you even need knobs if there is a remote control.
I really like this chassis:
Is 5.3 ohms Re speaker impedance OK for these amps when they are bridged?--- Works ok on 2x300W amplifier module.
When bridged, each amplifier sees half of the load.
In your case load for each amp will be 5.3/2=2.65 Ohm
Now, is this 5.3 Ohm the Nominal impedance?
If yes, expect the minimum impedance to be even lower (x0.8 acc IEC-268-5), i.e. 2.12 Ohm
I have tested the 2x150 W modules at 16, 8, 4 and 2.3 Ohm loads (Ohmic loads).
See posts 519 to 525.
Also post 507 for the behavior of the overload indicator
George
Wow, George, that's a whole lot of data!!
I scanned quickly through it all. Hard to get it all straight, but it looks like output on the 150W version drops as load goes below 4 ohms? And distortion rises. I don't suppose I can assume the 2x300W version behaves exactly the same.
Overload indicator? There's a clipping LED? I had no idea?! Need to examine your post 507...
PS: 5.3 ohms is Re, at DC. I think it's usually the lowest impedance point. The speakers is nominally rated 8 ohms, but it's a sub and won't ever be driven much past 100Hz. I'm looking to bridge 2x300W model to power it.
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Right. Better don't assume anything.
I can only speak of what I have measured.
Alas I don't have a 2x300W module.
Only five 2x150W boards. 😊
George
My dear friends, wish you all a Happy New Year, 新年快乐~🍾🍾
Привет, Эрик!
Не могли бы вы написать мне? Я хотел бы заказать усилитель, но пока не опубликовал достаточно информации, чтобы можно было отправлять личные сообщения.
Спасибо,
Не могли бы вы написать мне? Я хотел бы заказать усилитель, но пока не опубликовал достаточно информации, чтобы можно было отправлять личные сообщения.
Спасибо,
I felt ashamed when I saw this message, this is prioritized in the 2025 to-do list,