Hi Thmartin,
It depends on what you want. The PM 1.5 has fans I don't like if you use it at home. At 375 watts per channel into 8 ohms, it has enough energy to end most speakers. So my first question would be, do you need that much power?
They are good amplifiers for their use. The power supplies can be noisy and they draw current pretty much as needed. If you're going to run it loud, you need a dedicated run from the breaker panel. Carver amps do not like portable power generators or extension cords. Amplifiers with lower distortion exist. If you want efficiency with very high power, these are excellent amplifiers. They have two dual capacitors that may fail, the proper replacement is a special PCB with snap mount capacitors on it. The factory never once sold bare boards, only complete. I used them, then later created a copy PCB using the same parts with thicker copper. I install them, I won't sell them. There are sonic improvements possible, but this isn't a simple parts swap and the amplifier needs to be re-compensated during the process.
Hi egellings,
No, the M 1.0t is a solid state amplifier. They reduced the damping factor to match a tube amplifier and also used a series resistor as well.
It depends on what you want. The PM 1.5 has fans I don't like if you use it at home. At 375 watts per channel into 8 ohms, it has enough energy to end most speakers. So my first question would be, do you need that much power?
They are good amplifiers for their use. The power supplies can be noisy and they draw current pretty much as needed. If you're going to run it loud, you need a dedicated run from the breaker panel. Carver amps do not like portable power generators or extension cords. Amplifiers with lower distortion exist. If you want efficiency with very high power, these are excellent amplifiers. They have two dual capacitors that may fail, the proper replacement is a special PCB with snap mount capacitors on it. The factory never once sold bare boards, only complete. I used them, then later created a copy PCB using the same parts with thicker copper. I install them, I won't sell them. There are sonic improvements possible, but this isn't a simple parts swap and the amplifier needs to be re-compensated during the process.
Hi egellings,
No, the M 1.0t is a solid state amplifier. They reduced the damping factor to match a tube amplifier and also used a series resistor as well.
I converted my IIs to 1+1s, converted the energizer to allow passive bi-amping, used 2 x NAIm 160 and had added woofers. Then igotintosingle driver systems.
dave
What is passive bi-amping? Those used transformers didn't they?
I just repaired a pair of Servo Charge amplifiers.
I just repaired a pair of Servo Charge amplifiers.
Passive biamping is when you take the passive (parallel) XO, separate the sections and drive each with the 2 (of the same) amplifier.
https://www.t-linespeakers.org/FALL/system/accoustats.html
dave
https://www.t-linespeakers.org/FALL/system/accoustats.html
dave
Why would you do that? Whether you connect the two sections at the amp or in the speaker matters not. Assuming you aren't using tiny wire of course!
I could see using a pair of amplifiers, and also an electronic crossover.
I could see using a pair of amplifiers, and also an electronic crossover.
More power. Amps don’t have to work as hard. Made a significant difference with sonics.
Givent the transformers in the XO still needs to be there you won’t gain much from an active XO. If you had direct drive amplifier thou…
dave
Hi Dave,
Okay, so you split the load up between the two amplifiers? That isn't what that diagram shows.
If you feed the amplifiers only the frequency bands they handle (electronic crossover), you will have much more headroom on the high amplifier. May as well have done that since you already had two stereo amplifiers in use.
Okay, so you split the load up between the two amplifiers? That isn't what that diagram shows.
If you feed the amplifiers only the frequency bands they handle (electronic crossover), you will have much more headroom on the high amplifier. May as well have done that since you already had two stereo amplifiers in use.
The diagram shows the XO before modification. The connection to the bottom half of the circuit is rewired to an additional set of terminals. Quite simple. Just make sure you let everything discharge before bworkin gon it.
dave
dave
That makes perfect sense then Dave. Thanks.
I would have liked to hear it using an electronic crossover.
Believe me, you are very aware of what you're doing working on those things!
I would have liked to hear it using an electronic crossover.
Thankfully it doesn't take long to discharge. There is approximately 2,500 VDC on the drive, 4,500 + VDC on the diaphragm of the ones I worked on. High current too, so it wouldn't be a little shock.
Believe me, you are very aware of what you're doing working on those things!