I have the opportunity to buy a transformer from the power amplifier "IMG STA 1506 980W" 2x40v, for $50 a good price. New transformers are too expensive for me, not worth their price. But used "Toroids" for 1/3 of the price are 😉
Cheapest reputable SMPS I would use with a Wolverine is the Hypex smps1200a400. I have measured and listened, it is clean. It’s measurably silent if mounted vertically at the front of your chassis away from the input stages ie fix to the front plate.
Speaking of power supplies, has anyone compared SMTP (600W) vs Analog PSU (600W + 80,000uF) per channel, what is the lowest frequency response? I am referring to the lowest frequency range and its fidelity of presentation of 30 Hz - 100 Hz. 🙄
I haven't connected my Wolverine to the internet so I'm not sure 😛
PSU doesn't change the amplifiers frequency response (20hz to 20khz +0,-0.1dB, 5hz to 180khz +0,-3db). Between SMPS 1200W Hypex & 1900W MicroAudio, and LPS 1200VA and 800VA, I can't hear or measure a difference (other than measured idle noise floors with shorted input). Deep bass is present and clean for all.
PSU doesn't change the amplifiers frequency response (20hz to 20khz +0,-0.1dB, 5hz to 180khz +0,-3db). Between SMPS 1200W Hypex & 1900W MicroAudio, and LPS 1200VA and 800VA, I can't hear or measure a difference (other than measured idle noise floors with shorted input). Deep bass is present and clean for all.
Thanks for the comparison, ...I thought that with SMPS the bass would not go as deep as with an analog PSU. But I'm determined for MonoBlock 4U 400 chassis from modushop and 1200W SMPS from hypex is for monoblock unnecessarily powerful and more expensive than analog PSU. So I'll go the analog power supply way. 🙂
I don't know-hear the benefits of SMPS but linear power supply will last for ever...
Not the same for SMPS💥
Not the same for SMPS💥
I have compared in the past SMPS1200A400 with a linear PS in the same price range and I have to say that overall I prefer the SMPS.
Sound wise, SMPS had more fast and clear trebles and middles although not so deep and full body bass.
( Using as amp module the First One, not Wolverine )
Sound wise, SMPS had more fast and clear trebles and middles although not so deep and full body bass.
( Using as amp module the First One, not Wolverine )
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Hi Guys,
Here is a sneak peek at the Wolverine V5
Enjoy:
Here is a sneak peek at the Wolverine V5
Enjoy:
Incredible performance!
Just curious...how much did you invest in matching the relevant transistors and how did you do it ?
Just curious...how much did you invest in matching the relevant transistors and how did you do it ?
Well all the paired transistors are matched quite closely. I use a curve tracer to match them but you can use a matcher like the one Anatech designed or a normal component tester for great results too.
This is a great result, but. I am not sure of the validity of it because there is no reference. With the notch filter and reconstruction filter in REW there is a high likely hood of errors and false readings.
When I showed you how to set this up, I mentioned that in REW to be sure you were getting accurate readings you have to apply a signal with distortion, say -60dB, then confirm in the RTA that you are reading -60dB, if that is that case it would be nice to see in the video for confirmation, I have stopped using this method a long time ago now because it simply was not accurate enough or consistent enough to stand by the measurement.
Also the reading is in dBFS, so I am assuming that it wasnst calibrated to a know voltage level, and if it was it would be nice to see the actual level in volts or dBV.
But great work regardless, and I am anxious to see confirmed and valid measurements. Or if you guys want to send it to me, I can measure it on the AP555 and you will know for sure.
I am also interested to see if you guys made any progress on lowering the actual noise floor of the amp, as THD is only half the battle.
Hi Andy,
I hope you are going well.
That measurement is in dBc so you can be sure the distortion is at that level below the carrier.
Yes the equipment was calibrated for level first.
You have a lot of experience with REW but I think it is a bit rich to say that you showed me how to do it tbh.
In regards to noise any amplifier will multiply the input noise by its gain We are not looking at the noise specficially in this measurement.
When we do quote noise it will be input referred noise as it should be.
If you need more details on this send me a PM.
- Dan
I hope you are going well.
That measurement is in dBc so you can be sure the distortion is at that level below the carrier.
Yes the equipment was calibrated for level first.
You have a lot of experience with REW but I think it is a bit rich to say that you showed me how to do it tbh.
In regards to noise any amplifier will multiply the input noise by its gain We are not looking at the noise specficially in this measurement.
When we do quote noise it will be input referred noise as it should be.
If you need more details on this send me a PM.
- Dan
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Hi Guys,
I’m excited to share a fresh development for the Wolverine family: the EF3-5 output stage board! As you know, our current lineup includes the EF3-3 (3 current gain stages, 3 output transistor pairs) and the EF3-4 (3 current gain stages, 4 output pairs).
Now, we’re taking it up a notch with the EF3-5, featuring 3 current gain stages and 5 output transistor pairs for even greater power and stability.
To top it off, I’ve mirrored the EF3-5 design—just like the EF3-3 and EF3-4 in the 5th Group Buy—offering dedicated Left and Right channel versions. This keeps the inputs at the rear and outputs low on the heatsink, maintaining that clean, symmetrical layout you’ve come to love.
The EF3-5 boards are 7 mm longer and 10 mm wider than the current EF3-4 boards. All the holes still follow the UMS, except for the two at the top where the output transistors mount—they’ve moved up 10 mm. The output transistor mounting holes have also shifted up 10 mm, so some drilling and tapping will be required if you’d like to use the EF3-5.
The EF3-5 is perfect for those pushing higher currents or lower impedances (think 2-ohm loads or beyond) with the same Wolverine Class AB finesse.
Please see the 5th Group buy thread for further details.
Best regards,
Stuart (stuartmp)
Wolverine Team
I’m excited to share a fresh development for the Wolverine family: the EF3-5 output stage board! As you know, our current lineup includes the EF3-3 (3 current gain stages, 3 output transistor pairs) and the EF3-4 (3 current gain stages, 4 output pairs).
Now, we’re taking it up a notch with the EF3-5, featuring 3 current gain stages and 5 output transistor pairs for even greater power and stability.
To top it off, I’ve mirrored the EF3-5 design—just like the EF3-3 and EF3-4 in the 5th Group Buy—offering dedicated Left and Right channel versions. This keeps the inputs at the rear and outputs low on the heatsink, maintaining that clean, symmetrical layout you’ve come to love.
The EF3-5 boards are 7 mm longer and 10 mm wider than the current EF3-4 boards. All the holes still follow the UMS, except for the two at the top where the output transistors mount—they’ve moved up 10 mm. The output transistor mounting holes have also shifted up 10 mm, so some drilling and tapping will be required if you’d like to use the EF3-5.
The EF3-5 is perfect for those pushing higher currents or lower impedances (think 2-ohm loads or beyond) with the same Wolverine Class AB finesse.
Please see the 5th Group buy thread for further details.
Best regards,
Stuart (stuartmp)
Wolverine Team
Thank you for the info!
Is there a power spec for this new version of the board? Something like @Mainframe posted for the EF3-3 and 3-4?
Is there a power spec for this new version of the board? Something like @Mainframe posted for the EF3-3 and 3-4?
Adding extra output pairs won't increase output power for same PSU size/voltage. 64VDC power supply will still deliver up to 200WPC from a 3 pair, 4 pair and 5 pair. The ability to handle difficult loads improves with more output pairs. Each pair added increases idle current flow and heatsink temperatures.
5 pair is aimed at more experienced builders, more install complexity and heat considerations. I would advise 5 pair be used with 5U chassis. Or 4U chassis stick to 60VDC max rails to keep idle heat under control.
5 pair is aimed at more experienced builders, more install complexity and heat considerations. I would advise 5 pair be used with 5U chassis. Or 4U chassis stick to 60VDC max rails to keep idle heat under control.
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