There could be some venturi effect (?) with cooler air going in the lower section and warmer air flowing out of the top? We need more pictures! 😀
Sure, this photo is one of my current setup, all DIY stuff except the source. Speakers are MLTL, capable of down to 20Hz-6dB for organs. Bottom right is another amp which will be posted later.
Please remember this is a just a pictures thread and not for discussion on repairs etc. Please post in the relevant forums for that. One post asking for help has been moved.
Edit... make that two posts now.
My recently finished dual mono MX50SE build:
This is my prototype of the latest Mosfet power amp I developed for Pure Dynamics, a small Austrian high end company. For easy access the bottom is open, the final product looks quite different (https://www.puredynamics.com/produkt/class-a/).
The amp features lateral NMOS-Fets in an SRPP configuration.
Biasing is a version of Class A I call CCP ("constant current product", because instead of the sum it is the product of the push and pull currents which is held constant). Distortion and output impedance are minimised by a Haksford style error correction scheme.
You also see two components from the KISS series I developed for Pure Dynamics, a Li-Ion battery power supply and Jfet preamp with remote volume motor control.
Cheers,
Gerhard
The amp features lateral NMOS-Fets in an SRPP configuration.
Biasing is a version of Class A I call CCP ("constant current product", because instead of the sum it is the product of the push and pull currents which is held constant). Distortion and output impedance are minimised by a Haksford style error correction scheme.
You also see two components from the KISS series I developed for Pure Dynamics, a Li-Ion battery power supply and Jfet preamp with remote volume motor control.
Cheers,
Gerhard
Ionic Integrated Amp
The case design was based on the classic Greek Ionic Order, it looks like a complex integrity, yet grown from a simple cubic box. The prototype costed almost 3 years to complete. There are 2 versions: MKX and MKY. Major difference is that MKX has NO global negative feedback.
Ionic MKX SPECs:
Dual mono class AB integrated amplifier
Quasi DC amplifier
uV-level DC supply ripple, no large electrolytic cap (anybody done this before?)
Front-end topology: complimentary differential
Power stage: Push-pull T-circuit BJTs
Bandwidth: 3Hz-100KHz-3dB
Power per channel: 100W/8 ohms, 180W/4 ohms
Input impedance: Mega ohms level
Output impedance: 0.5 ohms
No NFB
Noise level: Quiet as in deep sea
Input terminals: 4 x RCA
Output terminals: Banana plugs
Operable parts: Power switch, volume control, input selection
No remote control
Size: 500x450x135mm
Weight: 12kg
Ionic MKY SPECs:
Dual mono class AB integrated amplifier
Quasi DC amplifier
uV-level DC supply ripple, no large electrolytic cap
Front-end topology: differential cascode
Power stage: push-pull T-circuit BJTs
Bandwidth: 2Hz-100KHz-3dB
Power per channel: 100W/8 ohms, 180W/4 ohms
Input impedance: Mega ohms level
Output impedance: 0.5 ohms
NFB: limited amount
Noise level: Quiet as in deep sea
Input terminals: 4 x RCA
Output terminals: Banana plugs
Operable parts: Power switch, volume control, input selection
No remote control
Size: 500x450x135mm
Weight: 12kg
======================================
Ionic in action:
The case design was based on the classic Greek Ionic Order, it looks like a complex integrity, yet grown from a simple cubic box. The prototype costed almost 3 years to complete. There are 2 versions: MKX and MKY. Major difference is that MKX has NO global negative feedback.
Ionic MKX SPECs:
Dual mono class AB integrated amplifier
Quasi DC amplifier
uV-level DC supply ripple, no large electrolytic cap (anybody done this before?)
Front-end topology: complimentary differential
Power stage: Push-pull T-circuit BJTs
Bandwidth: 3Hz-100KHz-3dB
Power per channel: 100W/8 ohms, 180W/4 ohms
Input impedance: Mega ohms level
Output impedance: 0.5 ohms
No NFB
Noise level: Quiet as in deep sea
Input terminals: 4 x RCA
Output terminals: Banana plugs
Operable parts: Power switch, volume control, input selection
No remote control
Size: 500x450x135mm
Weight: 12kg
Ionic MKY SPECs:
Dual mono class AB integrated amplifier
Quasi DC amplifier
uV-level DC supply ripple, no large electrolytic cap
Front-end topology: differential cascode
Power stage: push-pull T-circuit BJTs
Bandwidth: 2Hz-100KHz-3dB
Power per channel: 100W/8 ohms, 180W/4 ohms
Input impedance: Mega ohms level
Output impedance: 0.5 ohms
NFB: limited amount
Noise level: Quiet as in deep sea
Input terminals: 4 x RCA
Output terminals: Banana plugs
Operable parts: Power switch, volume control, input selection
No remote control
Size: 500x450x135mm
Weight: 12kg
======================================
Ionic in action:
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I was thinking "Diva" - which has a hifi theme to it.
I wouldn't look out of place down a tunnel at CERN would it(!)